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octal preamp tube questions
octal preamp tube questions
Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
got to thinking about doing something different with the PI, not sure what.
So, the wild hair raises the questions.
1) Is there an octal equivalent to a 12AT7?
2) Aside from the lower gain factor, is there anything in particular I
should be aware of in working with a 6SL7? How good/bad are current
production tubes?
3) Is there a significant difference between 6SC7 and 6SL7? Is this a bit
like comparing a 5751 to a 12AX7?
I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
between that and the 6SN7 with Ra in the 5k-15k range?
Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
got to thinking about doing something different with the PI, not sure what.
So, the wild hair raises the questions.
1) Is there an octal equivalent to a 12AT7?
2) Aside from the lower gain factor, is there anything in particular I
should be aware of in working with a 6SL7? How good/bad are current
production tubes?
3) Is there a significant difference between 6SC7 and 6SL7? Is this a bit
like comparing a 5751 to a 12AX7?
I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
between that and the 6SN7 with Ra in the 5k-15k range?
Re: octal preamp tube questions
Phil S. wrote:
> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
> got to thinking about doing something different with the PI, not sure what.
> So, the wild hair raises the questions.
>
> 1) Is there an octal equivalent to a 12AT7?
>
>
>
Your RCA book is your friend ... it's not uncommon to see 12ax7
in the entire (voltage) amp stages .. why *not* 6Sl7 ?
Phil S. wrote:
> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
> got to thinking about doing something different with the PI, not sure what.
> So, the wild hair raises the questions.
>
> 1) Is there an octal equivalent to a 12AT7?
>
>
>
Your RCA book is your friend ... it's not uncommon to see 12ax7
in the entire (voltage) amp stages .. why *not* 6Sl7 ?
Re: octal preamp tube questions
On May 17, 1:07 pm, WB <warb...@ppp,com > wrote:
> Phil S. wrote:
> > Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> > sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
> > got to thinking about doing something different with the PI, not sure what.
> > So, the wild hair raises the questions.
>
> > 1) Is there an octal equivalent to a 12AT7?
>
> Your RCA book is your friend ... it's not uncommon to see 12ax7
> in the entire (voltage) amp stages .. why *not* 6Sl7 ?
Funny this came up. I have an old (1954) Gibson GA-40 that chassis
that I was going to canibalise and have been thinking of getting
running first just for shits and giggles. When looking for the octal
preamp tubes (6sj7 and 6sn7) should I avoid metal tubes and stick to
glass? Seems to me I read that metal are more microphonic.
Phil, in my GA-40 the phase inverter is half a 6sn7 (cathodyne?..
plate to one 6v6 grid.. cathode to the other 6v6 grid).
OT: the driver for the tremolo is a 6v6 .. go figure :)
If you want the schematic let me know drew dot rsm at gmail dot com
Cheers
Drew
On May 17, 1:07 pm, WB <warb...@ppp,com > wrote:
> Phil S. wrote:
> > Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> > sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
> > got to thinking about doing something different with the PI, not sure what.
> > So, the wild hair raises the questions.
>
> > 1) Is there an octal equivalent to a 12AT7?
>
> Your RCA book is your friend ... it's not uncommon to see 12ax7
> in the entire (voltage) amp stages .. why *not* 6Sl7 ?
Funny this came up. I have an old (1954) Gibson GA-40 that chassis
that I was going to canibalise and have been thinking of getting
running first just for shits and giggles. When looking for the octal
preamp tubes (6sj7 and 6sn7) should I avoid metal tubes and stick to
glass? Seems to me I read that metal are more microphonic.
Phil, in my GA-40 the phase inverter is half a 6sn7 (cathodyne?..
plate to one 6v6 grid.. cathode to the other 6v6 grid).
OT: the driver for the tremolo is a 6v6 .. go figure :)
If you want the schematic let me know drew dot rsm at gmail dot com
Cheers
Drew
Re: octal preamp tube questions
On Sat, 17 May 2008 10:18:32 -0700 (PDT), DH82C <drew.rsm@gmail,com >
wrote:
>On May 17, 1:07 pm, WB <warb...@ppp,com > wrote:
>> Phil S. wrote:
>> > Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>> > sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
>> > got to thinking about doing something different with the PI, not sure what.
>> > So, the wild hair raises the questions.
>>
>> > 1) Is there an octal equivalent to a 12AT7?
>>
>> Your RCA book is your friend ... it's not uncommon to see 12ax7
>> in the entire (voltage) amp stages .. why *not* 6Sl7 ?
>
>Funny this came up. I have an old (1954) Gibson GA-40 that chassis
>that I was going to canibalise and have been thinking of getting
>running first just for shits and giggles. When looking for the octal
>preamp tubes (6sj7 and 6sn7) should I avoid metal tubes and stick to
>glass? Seems to me I read that metal are more microphonic.
>Phil, in my GA-40 the phase inverter is half a 6sn7 (cathodyne?..
>plate to one 6v6 grid.. cathode to the other 6v6 grid).
>OT: the driver for the tremolo is a 6v6 .. go figure :)
>If you want the schematic let me know drew dot rsm at gmail dot com
>
>Cheers
>
>Drew
Sell that thing on Ebay and use the money to get some new iron...
On Sat, 17 May 2008 10:18:32 -0700 (PDT), DH82C <drew.rsm@gmail,com >
wrote:
>On May 17, 1:07 pm, WB <warb...@ppp,com > wrote:
>> Phil S. wrote:
>> > Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>> > sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then I
>> > got to thinking about doing something different with the PI, not sure what.
>> > So, the wild hair raises the questions.
>>
>> > 1) Is there an octal equivalent to a 12AT7?
>>
>> Your RCA book is your friend ... it's not uncommon to see 12ax7
>> in the entire (voltage) amp stages .. why *not* 6Sl7 ?
>
>Funny this came up. I have an old (1954) Gibson GA-40 that chassis
>that I was going to canibalise and have been thinking of getting
>running first just for shits and giggles. When looking for the octal
>preamp tubes (6sj7 and 6sn7) should I avoid metal tubes and stick to
>glass? Seems to me I read that metal are more microphonic.
>Phil, in my GA-40 the phase inverter is half a 6sn7 (cathodyne?..
>plate to one 6v6 grid.. cathode to the other 6v6 grid).
>OT: the driver for the tremolo is a 6v6 .. go figure :)
>If you want the schematic let me know drew dot rsm at gmail dot com
>
>Cheers
>
>Drew
Sell that thing on Ebay and use the money to get some new iron...
Re: octal preamp tube questions
DH82C wrote:
> On May 17, 1:07 pm, WB <warb...@ppp,com > wrote:
> OT: the driver for the tremolo is a 6v6 .. go figure :)
> If you want the schematic let me know drew dot rsm at gmail dot com
check your email !
DH82C wrote:
> On May 17, 1:07 pm, WB <warb...@ppp,com > wrote:
> OT: the driver for the tremolo is a 6v6 .. go figure :)
> If you want the schematic let me know drew dot rsm at gmail dot com
check your email !
Re: octal preamp tube questions
"Phil S." <psymonds_no_spam@comcast,net > wrote in message
news:k6KdneqPPekkQ7PVnZ2dnUVZ_u2dnZ2d@comcast,com ...
> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then
> I got to thinking about doing something different with the PI, not sure
> what. So, the wild hair raises the questions.
>
> 1) Is there an octal equivalent to a 12AT7?
>
> 2) Aside from the lower gain factor, is there anything in particular I
> should be aware of in working with a 6SL7? How good/bad are current
> production tubes?
>
> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a bit
> like comparing a 5751 to a 12AX7?
>
> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
> between that and the 6SN7 with Ra in the 5k-15k range?
Gee Phil, you mean to tell us you *still* haven't bought
the "RCA Receiving Tube Manual" (in paperback)
or the "GE Essential Characteristics" also in paperback
yet? Sheeks! All of your answers are in those books!
"Phil S." <psymonds_no_spam@comcast,net > wrote in message
news:k6KdneqPPekkQ7PVnZ2dnUVZ_u2dnZ2d@comcast,com ...
> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then
> I got to thinking about doing something different with the PI, not sure
> what. So, the wild hair raises the questions.
>
> 1) Is there an octal equivalent to a 12AT7?
>
> 2) Aside from the lower gain factor, is there anything in particular I
> should be aware of in working with a 6SL7? How good/bad are current
> production tubes?
>
> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a bit
> like comparing a 5751 to a 12AX7?
>
> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
> between that and the 6SN7 with Ra in the 5k-15k range?
Gee Phil, you mean to tell us you *still* haven't bought
the "RCA Receiving Tube Manual" (in paperback)
or the "GE Essential Characteristics" also in paperback
yet? Sheeks! All of your answers are in those books!
Re: octal preamp tube questions
On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
<ampscience@tuneland,com > wrote:
>
>"Phil S." <psymonds_no_spam@comcast,net > wrote in message
>news:k6KdneqPPekkQ7PVnZ2dnUVZ_u2dnZ2d@comcast,com ...
>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then
>> I got to thinking about doing something different with the PI, not sure
>> what. So, the wild hair raises the questions.
>>
>> 1) Is there an octal equivalent to a 12AT7?
>>
>> 2) Aside from the lower gain factor, is there anything in particular I
>> should be aware of in working with a 6SL7? How good/bad are current
>> production tubes?
>>
>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a bit
>> like comparing a 5751 to a 12AX7?
>>
>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
>> between that and the 6SN7 with Ra in the 5k-15k range?
>
>Gee Phil, you mean to tell us you *still* haven't bought
>the "RCA Receiving Tube Manual" (in paperback)
>or the "GE Essential Characteristics" also in paperback
>yet? Sheeks! All of your answers are in those books!
>
Didn't I see those online? PMillet or somewhere?
On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
<ampscience@tuneland,com > wrote:
>
>"Phil S." <psymonds_no_spam@comcast,net > wrote in message
>news:k6KdneqPPekkQ7PVnZ2dnUVZ_u2dnZ2d@comcast,com ...
>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7. Then
>> I got to thinking about doing something different with the PI, not sure
>> what. So, the wild hair raises the questions.
>>
>> 1) Is there an octal equivalent to a 12AT7?
>>
>> 2) Aside from the lower gain factor, is there anything in particular I
>> should be aware of in working with a 6SL7? How good/bad are current
>> production tubes?
>>
>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a bit
>> like comparing a 5751 to a 12AX7?
>>
>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
>> between that and the 6SN7 with Ra in the 5k-15k range?
>
>Gee Phil, you mean to tell us you *still* haven't bought
>the "RCA Receiving Tube Manual" (in paperback)
>or the "GE Essential Characteristics" also in paperback
>yet? Sheeks! All of your answers are in those books!
>
Didn't I see those online? PMillet or somewhere?
Re: octal preamp tube questions
"J.P." <jpasano@hotmail,com > wrote in message
news:ukku249f38ng8pm16ve7anbr0knkdv7vds@4ax,com ...
> On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
> <ampscience@tuneland,com > wrote:
>
>>
>>"Phil S." <psymonds_no_spam@comcast,net > wrote in message
>>news:k6KdneqPPekkQ7PVnZ2dnUVZ_u2dnZ2d@comcast,com ...
>>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7.
>>> Then
>>> I got to thinking about doing something different with the PI, not sure
>>> what. So, the wild hair raises the questions.
>>>
>>> 1) Is there an octal equivalent to a 12AT7?
>>>
>>> 2) Aside from the lower gain factor, is there anything in particular I
>>> should be aware of in working with a 6SL7? How good/bad are current
>>> production tubes?
>>>
>>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a
>>> bit
>>> like comparing a 5751 to a 12AX7?
>>>
>>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
>>> between that and the 6SN7 with Ra in the 5k-15k range?
>>
>>Gee Phil, you mean to tell us you *still* haven't bought
>>the "RCA Receiving Tube Manual" (in paperback)
>>or the "GE Essential Characteristics" also in paperback
>>yet? Sheeks! All of your answers are in those books!
>>
> Didn't I see those online? PMillet or somewhere?
Antique Electronics sells reprints of them, among other books.
"J.P." <jpasano@hotmail,com > wrote in message
news:ukku249f38ng8pm16ve7anbr0knkdv7vds@4ax,com ...
> On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
> <ampscience@tuneland,com > wrote:
>
>>
>>"Phil S." <psymonds_no_spam@comcast,net > wrote in message
>>news:k6KdneqPPekkQ7PVnZ2dnUVZ_u2dnZ2d@comcast,com ...
>>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7.
>>> Then
>>> I got to thinking about doing something different with the PI, not sure
>>> what. So, the wild hair raises the questions.
>>>
>>> 1) Is there an octal equivalent to a 12AT7?
>>>
>>> 2) Aside from the lower gain factor, is there anything in particular I
>>> should be aware of in working with a 6SL7? How good/bad are current
>>> production tubes?
>>>
>>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a
>>> bit
>>> like comparing a 5751 to a 12AX7?
>>>
>>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
>>> between that and the 6SN7 with Ra in the 5k-15k range?
>>
>>Gee Phil, you mean to tell us you *still* haven't bought
>>the "RCA Receiving Tube Manual" (in paperback)
>>or the "GE Essential Characteristics" also in paperback
>>yet? Sheeks! All of your answers are in those books!
>>
> Didn't I see those online? PMillet or somewhere?
Antique Electronics sells reprints of them, among other books.
Re: octal preamp tube questions
On May 17, 10:55 pm, "Elvis Kabong" <ampscie...@tuneland,com > wrote:
> "J.P." <jpas...@hotmail,com > wrote in message
>
> news:ukku249f38ng8pm16ve7anbr0knkdv7vds@4ax,com ...
>
>
>
>
>
> > On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
> > <ampscie...@tuneland,com > wrote:
>
> >>"Phil S." <psymonds no s...@comcast,net > wrote in message
> >>news:k6KdneqPPekkQ7PVnZ2dnUVZ u2dnZ2d@comcast,com ...
> >>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> >>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7.
> >>> Then
> >>> I got to thinking about doing something different with the PI, not sure
> >>> what. So, the wild hair raises the questions.
>
> >>> 1) Is there an octal equivalent to a 12AT7?
>
> >>> 2) Aside from the lower gain factor, is there anything in particular I
> >>> should be aware of in working with a 6SL7? How good/bad are current
> >>> production tubes?
>
> >>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a
> >>> bit
> >>> like comparing a 5751 to a 12AX7?
>
> >>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
> >>> between that and the 6SN7 with Ra in the 5k-15k range?
>
> >>Gee Phil, you mean to tell us you *still* haven't bought
> >>the "RCA Receiving Tube Manual" (in paperback)
> >>or the "GE Essential Characteristics" also in paperback
> >>yet? Sheeks! All of your answers are in those books!
>
> > Didn't I see those online? PMillet or somewhere?
>
> Antique Electronics sells reprints of them, among other books.- Hide quoted text -
>
> - Show quoted text -
Dunno if it is legal but the GE Essential Characteristics is available
on pdf from emule..
On May 17, 10:55 pm, "Elvis Kabong" <ampscie...@tuneland,com > wrote:
> "J.P." <jpas...@hotmail,com > wrote in message
>
> news:ukku249f38ng8pm16ve7anbr0knkdv7vds@4ax,com ...
>
>
>
>
>
> > On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
> > <ampscie...@tuneland,com > wrote:
>
> >>"Phil S." <psymonds no s...@comcast,net > wrote in message
> >>news:k6KdneqPPekkQ7PVnZ2dnUVZ u2dnZ2d@comcast,com ...
> >>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
> >>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7.
> >>> Then
> >>> I got to thinking about doing something different with the PI, not sure
> >>> what. So, the wild hair raises the questions.
>
> >>> 1) Is there an octal equivalent to a 12AT7?
>
> >>> 2) Aside from the lower gain factor, is there anything in particular I
> >>> should be aware of in working with a 6SL7? How good/bad are current
> >>> production tubes?
>
> >>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a
> >>> bit
> >>> like comparing a 5751 to a 12AX7?
>
> >>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
> >>> between that and the 6SN7 with Ra in the 5k-15k range?
>
> >>Gee Phil, you mean to tell us you *still* haven't bought
> >>the "RCA Receiving Tube Manual" (in paperback)
> >>or the "GE Essential Characteristics" also in paperback
> >>yet? Sheeks! All of your answers are in those books!
>
> > Didn't I see those online? PMillet or somewhere?
>
> Antique Electronics sells reprints of them, among other books.- Hide quoted text -
>
> - Show quoted text -
Dunno if it is legal but the GE Essential Characteristics is available
on pdf from emule..
Re: octal preamp tube questions
On Sun, 18 May 2008 12:01:14 -0700 (PDT), DH82C <drew.rsm@gmail,com >
wrote:
>On May 17, 10:55 pm, "Elvis Kabong" <ampscie...@tuneland,com > wrote:
>> "J.P." <jpas...@hotmail,com > wrote in message
>>
>> news:ukku249f38ng8pm16ve7anbr0knkdv7vds@4ax,com ...
>>
>>
>>
>>
>>
>> > On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
>> > <ampscie...@tuneland,com > wrote:
>>
>> >>"Phil S." <psymonds no s...@comcast,net > wrote in message
>> >>news:k6KdneqPPekkQ7PVnZ2dnUVZ u2dnZ2d@comcast,com ...
>> >>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>> >>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7.
>> >>> Then
>> >>> I got to thinking about doing something different with the PI, not sure
>> >>> what. So, the wild hair raises the questions.
>>
>> >>> 1) Is there an octal equivalent to a 12AT7?
>>
>> >>> 2) Aside from the lower gain factor, is there anything in particular I
>> >>> should be aware of in working with a 6SL7? How good/bad are current
>> >>> production tubes?
>>
>> >>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a
>> >>> bit
>> >>> like comparing a 5751 to a 12AX7?
>>
>> >>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
>> >>> between that and the 6SN7 with Ra in the 5k-15k range?
>>
>> >>Gee Phil, you mean to tell us you *still* haven't bought
>> >>the "RCA Receiving Tube Manual" (in paperback)
>> >>or the "GE Essential Characteristics" also in paperback
>> >>yet? Sheeks! All of your answers are in those books!
>>
>> > Didn't I see those online? PMillet or somewhere?
>>
>> Antique Electronics sells reprints of them, among other books.- Hide quoted text -
>>
>> - Show quoted text -
>
>Dunno if it is legal but the GE Essential Characteristics is available
>on pdf from emule..
I got one of those from LV...RC30 ...thing is about an 11/4" thick or
so...
On Sun, 18 May 2008 12:01:14 -0700 (PDT), DH82C <drew.rsm@gmail,com >
wrote:
>On May 17, 10:55 pm, "Elvis Kabong" <ampscie...@tuneland,com > wrote:
>> "J.P." <jpas...@hotmail,com > wrote in message
>>
>> news:ukku249f38ng8pm16ve7anbr0knkdv7vds@4ax,com ...
>>
>>
>>
>>
>>
>> > On Sat, 17 May 2008 16:21:27 -0500, "Elvis Kabong"
>> > <ampscie...@tuneland,com > wrote:
>>
>> >>"Phil S." <psymonds no s...@comcast,net > wrote in message
>> >>news:k6KdneqPPekkQ7PVnZ2dnUVZ u2dnZ2d@comcast,com ...
>> >>> Oh, just thinking here...I've got a recycled chassis drilled for 5 octal
>> >>> sockets. I was thinking maybe a pair of 6V6, and two or three 6SL7.
>> >>> Then
>> >>> I got to thinking about doing something different with the PI, not sure
>> >>> what. So, the wild hair raises the questions.
>>
>> >>> 1) Is there an octal equivalent to a 12AT7?
>>
>> >>> 2) Aside from the lower gain factor, is there anything in particular I
>> >>> should be aware of in working with a 6SL7? How good/bad are current
>> >>> production tubes?
>>
>> >>> 3) Is there a significant difference between 6SC7 and 6SL7? Is this a
>> >>> bit
>> >>> like comparing a 5751 to a 12AX7?
>>
>> >>> I already know there is a 6SN7, roughly a 12AU7 equivalent. What's in
>> >>> between that and the 6SN7 with Ra in the 5k-15k range?
>>
>> >>Gee Phil, you mean to tell us you *still* haven't bought
>> >>the "RCA Receiving Tube Manual" (in paperback)
>> >>or the "GE Essential Characteristics" also in paperback
>> >>yet? Sheeks! All of your answers are in those books!
>>
>> > Didn't I see those online? PMillet or somewhere?
>>
>> Antique Electronics sells reprints of them, among other books.- Hide quoted text -
>>
>> - Show quoted text -
>
>Dunno if it is legal but the GE Essential Characteristics is available
>on pdf from emule..
I got one of those from LV...RC30 ...thing is about an 11/4" thick or
so...
Re: octal preamp tube questions
Elvis Kabong wrote:
>
> Gee Phil, you mean to tell us you *still* haven't bought
> the "RCA Receiving Tube Manual" (in paperback)
>
>
The RCA books are actually online .. I have them bookmarked ...
SOMEWHERE ...on one of my computers ...
I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
couple of Rc-30 ( Radio Shack 70's ) .
I troll Amazon every once and awhile and grab them for $1.
E-bay is *way* too expense.!
Elvis Kabong wrote:
>
> Gee Phil, you mean to tell us you *still* haven't bought
> the "RCA Receiving Tube Manual" (in paperback)
>
>
The RCA books are actually online .. I have them bookmarked ...
SOMEWHERE ...on one of my computers ...
I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
couple of Rc-30 ( Radio Shack 70's ) .
I troll Amazon every once and awhile and grab them for $1.
E-bay is *way* too expense.!
Re: octal preamp tube questions
"WB" <WB@here,com > wrote in message
news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
> Elvis Kabong wrote:
>>
>> Gee Phil, you mean to tell us you *still* haven't bought
>> the "RCA Receiving Tube Manual" (in paperback)
>>
>>
> The RCA books are actually online .. I have them bookmarked ...
> SOMEWHERE ...on one of my computers ...
>
> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
> couple of Rc-30 ( Radio Shack 70's ) .
>
> I troll Amazon every once and awhile and grab them for $1.
> E-bay is *way* too expense.!
>
I've been off line. I was away for the weekend, then Comcast had some
"engineering problem".
I tried to post through Google, but it doesn't seem to be here.
Anyhow, thanks to all for the advice.
I downloaded RC-30. This is something one wants to thumb through, not read
at the computer. My brief perusal didn't turn up an octal sub for a 12AT7.
Anyone who doesn't mind throwing me a bone?
So, I broke down and bought both the GE and RCA at Amazon today, as they
appeared to be cheaper there compared to eBay. At worst, it's even with
eBay. I figure they always have resale value. They should be here by the
end of the week.
--Phil
"WB" <WB@here,com > wrote in message
news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
> Elvis Kabong wrote:
>>
>> Gee Phil, you mean to tell us you *still* haven't bought
>> the "RCA Receiving Tube Manual" (in paperback)
>>
>>
> The RCA books are actually online .. I have them bookmarked ...
> SOMEWHERE ...on one of my computers ...
>
> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
> couple of Rc-30 ( Radio Shack 70's ) .
>
> I troll Amazon every once and awhile and grab them for $1.
> E-bay is *way* too expense.!
>
I've been off line. I was away for the weekend, then Comcast had some
"engineering problem".
I tried to post through Google, but it doesn't seem to be here.
Anyhow, thanks to all for the advice.
I downloaded RC-30. This is something one wants to thumb through, not read
at the computer. My brief perusal didn't turn up an octal sub for a 12AT7.
Anyone who doesn't mind throwing me a bone?
So, I broke down and bought both the GE and RCA at Amazon today, as they
appeared to be cheaper there compared to eBay. At worst, it's even with
eBay. I figure they always have resale value. They should be here by the
end of the week.
--Phil
Re: octal preamp tube questions
"Phil S." <psymonds_no_spam@comcast,net > wrote in message
news:MqadnaGjcOtCk6_VnZ2dnUVZ_sWdnZ2d@comcast,com ...
>
> "WB" <WB@here,com > wrote in message
> news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
>> Elvis Kabong wrote:
>>>
>>> Gee Phil, you mean to tell us you *still* haven't bought
>>> the "RCA Receiving Tube Manual" (in paperback)
>>>
>>>
>> The RCA books are actually online .. I have them bookmarked ...
>> SOMEWHERE ...on one of my computers ...
>>
>> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
>> couple of Rc-30 ( Radio Shack 70's ) .
>>
>> I troll Amazon every once and awhile and grab them for $1.
>> E-bay is *way* too expense.!
>>
>
> I've been off line. I was away for the weekend, then Comcast had some
> "engineering problem".
>
> I tried to post through Google, but it doesn't seem to be here.
>
> Anyhow, thanks to all for the advice.
>
> I downloaded RC-30. This is something one wants to thumb through, not
> read at the computer. My brief perusal didn't turn up an octal sub for a
> 12AT7. Anyone who doesn't mind throwing me a bone?
>
> So, I broke down and bought both the GE and RCA at Amazon today, as they
> appeared to be cheaper there compared to eBay. At worst, it's even with
> eBay. I figure they always have resale value. They should be here by the
> end of the week.
>
> --Phil
Hi Phil - all I could find with a quick glance were 3 octal twin triodes
with a 70 mu factor, a 6SC7, a 6SL7 and a 6SU7. Couldn't find
any with a 60 mu. BTW, the 6SC7 has a common cathode.
"Phil S." <psymonds_no_spam@comcast,net > wrote in message
news:MqadnaGjcOtCk6_VnZ2dnUVZ_sWdnZ2d@comcast,com ...
>
> "WB" <WB@here,com > wrote in message
> news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
>> Elvis Kabong wrote:
>>>
>>> Gee Phil, you mean to tell us you *still* haven't bought
>>> the "RCA Receiving Tube Manual" (in paperback)
>>>
>>>
>> The RCA books are actually online .. I have them bookmarked ...
>> SOMEWHERE ...on one of my computers ...
>>
>> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
>> couple of Rc-30 ( Radio Shack 70's ) .
>>
>> I troll Amazon every once and awhile and grab them for $1.
>> E-bay is *way* too expense.!
>>
>
> I've been off line. I was away for the weekend, then Comcast had some
> "engineering problem".
>
> I tried to post through Google, but it doesn't seem to be here.
>
> Anyhow, thanks to all for the advice.
>
> I downloaded RC-30. This is something one wants to thumb through, not
> read at the computer. My brief perusal didn't turn up an octal sub for a
> 12AT7. Anyone who doesn't mind throwing me a bone?
>
> So, I broke down and bought both the GE and RCA at Amazon today, as they
> appeared to be cheaper there compared to eBay. At worst, it's even with
> eBay. I figure they always have resale value. They should be here by the
> end of the week.
>
> --Phil
Hi Phil - all I could find with a quick glance were 3 octal twin triodes
with a 70 mu factor, a 6SC7, a 6SL7 and a 6SU7. Couldn't find
any with a 60 mu. BTW, the 6SC7 has a common cathode.
Re: octal preamp tube questions
"Elvis Kabong" <ampscience@tuneland,com > wrote in message
news:nDoYj.7946$255.2691@bignews8.bellsouth,net ...
>
> "Phil S." <psymonds_no_spam@comcast,net > wrote in message
> news:MqadnaGjcOtCk6_VnZ2dnUVZ_sWdnZ2d@comcast,com ...
>>
>> "WB" <WB@here,com > wrote in message
>> news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
>>> Elvis Kabong wrote:
>>>>
>>>> Gee Phil, you mean to tell us you *still* haven't bought
>>>> the "RCA Receiving Tube Manual" (in paperback)
>>>>
>>>>
>>> The RCA books are actually online .. I have them bookmarked ...
>>> SOMEWHERE ...on one of my computers ...
>>>
>>> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
>>> couple of Rc-30 ( Radio Shack 70's ) .
>>>
>>> I troll Amazon every once and awhile and grab them for $1.
>>> E-bay is *way* too expense.!
>>>
>>
>> I've been off line. I was away for the weekend, then Comcast had some
>> "engineering problem".
>>
>> I tried to post through Google, but it doesn't seem to be here.
>>
>> Anyhow, thanks to all for the advice.
>>
>> I downloaded RC-30. This is something one wants to thumb through, not
>> read at the computer. My brief perusal didn't turn up an octal sub for a
>> 12AT7. Anyone who doesn't mind throwing me a bone?
>>
>> So, I broke down and bought both the GE and RCA at Amazon today, as they
>> appeared to be cheaper there compared to eBay. At worst, it's even with
>> eBay. I figure they always have resale value. They should be here by
>> the end of the week.
>>
>> --Phil
>
> Hi Phil - all I could find with a quick glance were 3 octal twin triodes
> with a 70 mu factor, a 6SC7, a 6SL7 and a 6SU7. Couldn't find
> any with a 60 mu. BTW, the 6SC7 has a common cathode.
>
Hi Ed,
12AT7 Ra= 11,000
6SC7 Ra=53,000
6SL7 Ra= 44,000
6SU7 Ra=44,000
IMO, these Ra numbers make the tubes better as 12AX7 subs, but not at 12AT7
subs. That's what's prompting the question.
Thanks for looking, and I really appreciate it.
Phil
"Elvis Kabong" <ampscience@tuneland,com > wrote in message
news:nDoYj.7946$255.2691@bignews8.bellsouth,net ...
>
> "Phil S." <psymonds_no_spam@comcast,net > wrote in message
> news:MqadnaGjcOtCk6_VnZ2dnUVZ_sWdnZ2d@comcast,com ...
>>
>> "WB" <WB@here,com > wrote in message
>> news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
>>> Elvis Kabong wrote:
>>>>
>>>> Gee Phil, you mean to tell us you *still* haven't bought
>>>> the "RCA Receiving Tube Manual" (in paperback)
>>>>
>>>>
>>> The RCA books are actually online .. I have them bookmarked ...
>>> SOMEWHERE ...on one of my computers ...
>>>
>>> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
>>> couple of Rc-30 ( Radio Shack 70's ) .
>>>
>>> I troll Amazon every once and awhile and grab them for $1.
>>> E-bay is *way* too expense.!
>>>
>>
>> I've been off line. I was away for the weekend, then Comcast had some
>> "engineering problem".
>>
>> I tried to post through Google, but it doesn't seem to be here.
>>
>> Anyhow, thanks to all for the advice.
>>
>> I downloaded RC-30. This is something one wants to thumb through, not
>> read at the computer. My brief perusal didn't turn up an octal sub for a
>> 12AT7. Anyone who doesn't mind throwing me a bone?
>>
>> So, I broke down and bought both the GE and RCA at Amazon today, as they
>> appeared to be cheaper there compared to eBay. At worst, it's even with
>> eBay. I figure they always have resale value. They should be here by
>> the end of the week.
>>
>> --Phil
>
> Hi Phil - all I could find with a quick glance were 3 octal twin triodes
> with a 70 mu factor, a 6SC7, a 6SL7 and a 6SU7. Couldn't find
> any with a 60 mu. BTW, the 6SC7 has a common cathode.
>
Hi Ed,
12AT7 Ra= 11,000
6SC7 Ra=53,000
6SL7 Ra= 44,000
6SU7 Ra=44,000
IMO, these Ra numbers make the tubes better as 12AX7 subs, but not at 12AT7
subs. That's what's prompting the question.
Thanks for looking, and I really appreciate it.
Phil
Re: octal preamp tube questions
"Phil S." <psymonds_no_spam@comcast,net > wrote in message
news:EvadnWjqSMsGh6_VnZ2dnUVZ_hqdnZ2d@comcast,com ...
>
> "Elvis Kabong" <ampscience@tuneland,com > wrote in message
> news:nDoYj.7946$255.2691@bignews8.bellsouth,net ...
>>
>> "Phil S." <psymonds_no_spam@comcast,net > wrote in message
>> news:MqadnaGjcOtCk6_VnZ2dnUVZ_sWdnZ2d@comcast,com ...
>>>
>>> "WB" <WB@here,com > wrote in message
>>> news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
>>>> Elvis Kabong wrote:
>>>>>
>>>>> Gee Phil, you mean to tell us you *still* haven't bought
>>>>> the "RCA Receiving Tube Manual" (in paperback)
>>>>>
>>>>>
>>>> The RCA books are actually online .. I have them bookmarked ...
>>>> SOMEWHERE ...on one of my computers ...
>>>>
>>>> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
>>>> couple of Rc-30 ( Radio Shack 70's ) .
>>>>
>>>> I troll Amazon every once and awhile and grab them for $1.
>>>> E-bay is *way* too expense.!
>>>>
>>>
>>> I've been off line. I was away for the weekend, then Comcast had some
>>> "engineering problem".
>>>
>>> I tried to post through Google, but it doesn't seem to be here.
>>>
>>> Anyhow, thanks to all for the advice.
>>>
>>> I downloaded RC-30. This is something one wants to thumb through, not
>>> read at the computer. My brief perusal didn't turn up an octal sub for
>>> a 12AT7. Anyone who doesn't mind throwing me a bone?
>>>
>>> So, I broke down and bought both the GE and RCA at Amazon today, as they
>>> appeared to be cheaper there compared to eBay. At worst, it's even with
>>> eBay. I figure they always have resale value. They should be here by
>>> the end of the week.
>>>
>>> --Phil
>>
>> Hi Phil - all I could find with a quick glance were 3 octal twin triodes
>> with a 70 mu factor, a 6SC7, a 6SL7 and a 6SU7. Couldn't find
>> any with a 60 mu. BTW, the 6SC7 has a common cathode.
>>
> Hi Ed,
> 12AT7 Ra= 11,000
>
> 6SC7 Ra=53,000
> 6SL7 Ra= 44,000
> 6SU7 Ra=44,000
>
> IMO, these Ra numbers make the tubes better as 12AX7 subs, but not at
> 12AT7 subs. That's what's prompting the question.
>
> Thanks for looking, and I really appreciate it.
>
> Phil
Well Phil, if you are gonna limit your search parameters
to Plate resistance, check out 6N7.
12AT7 10,900 Rp / 5,500 Gm / 60 mu
6N7 11,000 Rp / 3,200 gm / 35 mu @ 294 PV instead
of 250V. (Also contains common cathode)
Though I wouldn't expect as much gain as a 12AT7 provides.
"Phil S." <psymonds_no_spam@comcast,net > wrote in message
news:EvadnWjqSMsGh6_VnZ2dnUVZ_hqdnZ2d@comcast,com ...
>
> "Elvis Kabong" <ampscience@tuneland,com > wrote in message
> news:nDoYj.7946$255.2691@bignews8.bellsouth,net ...
>>
>> "Phil S." <psymonds_no_spam@comcast,net > wrote in message
>> news:MqadnaGjcOtCk6_VnZ2dnUVZ_sWdnZ2d@comcast,com ...
>>>
>>> "WB" <WB@here,com > wrote in message
>>> news:482f5db9$0$4078$bbae4d71@news.suddenlink,net ...
>>>> Elvis Kabong wrote:
>>>>>
>>>>> Gee Phil, you mean to tell us you *still* haven't bought
>>>>> the "RCA Receiving Tube Manual" (in paperback)
>>>>>
>>>>>
>>>> The RCA books are actually online .. I have them bookmarked ...
>>>> SOMEWHERE ...on one of my computers ...
>>>>
>>>> I have RCA Rc-14, and rc-16 too, one which original 6L6 power amp,
>>>> couple of Rc-30 ( Radio Shack 70's ) .
>>>>
>>>> I troll Amazon every once and awhile and grab them for $1.
>>>> E-bay is *way* too expense.!
>>>>
>>>
>>> I've been off line. I was away for the weekend, then Comcast had some
>>> "engineering problem".
>>>
>>> I tried to post through Google, but it doesn't seem to be here.
>>>
>>> Anyhow, thanks to all for the advice.
>>>
>>> I downloaded RC-30. This is something one wants to thumb through, not
>>> read at the computer. My brief perusal didn't turn up an octal sub for
>>> a 12AT7. Anyone who doesn't mind throwing me a bone?
>>>
>>> So, I broke down and bought both the GE and RCA at Amazon today, as they
>>> appeared to be cheaper there compared to eBay. At worst, it's even with
>>> eBay. I figure they always have resale value. They should be here by
>>> the end of the week.
>>>
>>> --Phil
>>
>> Hi Phil - all I could find with a quick glance were 3 octal twin triodes
>> with a 70 mu factor, a 6SC7, a 6SL7 and a 6SU7. Couldn't find
>> any with a 60 mu. BTW, the 6SC7 has a common cathode.
>>
> Hi Ed,
> 12AT7 Ra= 11,000
>
> 6SC7 Ra=53,000
> 6SL7 Ra= 44,000
> 6SU7 Ra=44,000
>
> IMO, these Ra numbers make the tubes better as 12AX7 subs, but not at
> 12AT7 subs. That's what's prompting the question.
>
> Thanks for looking, and I really appreciate it.
>
> Phil
Well Phil, if you are gonna limit your search parameters
to Plate resistance, check out 6N7.
12AT7 10,900 Rp / 5,500 Gm / 60 mu
6N7 11,000 Rp / 3,200 gm / 35 mu @ 294 PV instead
of 250V. (Also contains common cathode)
Though I wouldn't expect as much gain as a 12AT7 provides.
