Need a Couple of Schematics

Demeter VTMP-2A

Bogen CHA33

Googled and looked all over the place for the Demeter
and Schematics Heaven didn't have that model Bogen.

Any of you personally have a copy or know someone?

If so, please let me know and I'll provide my real email address.

Thanks,

Ed

Elvis Kabong wrote:
>
> Demeter VTMP-2A
>
> Bogen CHA33
>
> Googled and looked all over the place for the Demeter
> and Schematics Heaven didn't have that model Bogen.
>
> Any of you personally have a copy or know someone?
>
> If so, please let me know and I'll provide my real email address.
>
> Thanks,
>
> Ed





Try here....

http://www.filmtools.com/ticpen2510me.html


I grab the old 1388-#2, and give it a workout.

http://keysan.com/ksu0358.htm

Old school.


Regards,

Rich Koerner,
Time Electronics.
http://www.timeelect.com

Specialists in Live Sound FOH Engineering,
Music & Studio Production,
Vintage Instruments, and Tube Amplifiers

"Rich Koerner" <richk@timeelect.com> wrote in message
news:482C0A83.DAC6E416@timeelect.com...
>
>
> Elvis Kabong wrote:
>>
>> Demeter VTMP-2A
>>
>> Bogen CHA33
>>
>> Googled and looked all over the place for the Demeter
>> and Schematics Heaven didn't have that model Bogen.
>>
>> Any of you personally have a copy or know someone?
>>
>> If so, please let me know and I'll provide my real email address.
>>
>> Thanks,
>>
>> Ed
>
>
>
>
>
> Try here....
>
> http://www.filmtools.com/ticpen2510me.html
>
>
> I grab the old 1388-#2, and give it a workout.
>
> http://keysan.com/ksu0358.htm
>
> Old school.
>
>
> Regards,
>
> Rich Koerner,
> Time Electronics.
> http://www.timeelect.com
>
> Specialists in Live Sound FOH Engineering,
> Music & Studio Production,
> Vintage Instruments, and Tube Amplifiers

...and if that doesn't work, see if the public library has a SAMS for
it/them.

"Phil S." <psymonds_no_spam@comcast.net> wrote in message
news:3Y-dnQ_K8-dGv7HVnZ2dnUVZ_qLinZ2d@comcast.com...
>
> "Rich Koerner" <richk@timeelect.com> wrote in message
> news:482C0A83.DAC6E416@timeelect.com...
>>
>>
>> Elvis Kabong wrote:
>>>
>>> Demeter VTMP-2A
>>>
>>> Bogen CHA33
>>>
>>> Googled and looked all over the place for the Demeter
>>> and Schematics Heaven didn't have that model Bogen.
>>>
>>> Any of you personally have a copy or know someone?
>>>
>>> If so, please let me know and I'll provide my real email address.
>>>
>>> Thanks,
>>>
>>> Ed
>>
>>
>>
>>
>>
>> Try here....
>>
>> http://www.filmtools.com/ticpen2510me.html
>>
>>
>> I grab the old 1388-#2, and give it a workout.
>>
>> http://keysan.com/ksu0358.htm
>>
>> Old school.
>>
>>
>> Regards,
>>
>> Rich Koerner,
>> Time Electronics.
>> http://www.timeelect.com
>>
>> Specialists in Live Sound FOH Engineering,
>> Music & Studio Production,
>> Vintage Instruments, and Tube Amplifiers
>
> ...and if that doesn't work, see if the public library has a SAMS for
> it/them.

I was just mentally alerted to get in touch with
the psychic print network.

"Rich Koerner" <richk@timeelect.com> wrote in message
news:482C0A83.DAC6E416@timeelect.com...
>
>
> Elvis Kabong wrote:
>>
>> Demeter VTMP-2A
>>
>> Bogen CHA33
>>
>> Googled and looked all over the place for the Demeter
>> and Schematics Heaven didn't have that model Bogen.
>>
>> Any of you personally have a copy or know someone?
>>
>> If so, please let me know and I'll provide my real email address.
>>
>> Thanks,
>>
>> Ed
>
>
>
>
>
> Try here....
>
> http://www.filmtools.com/ticpen2510me.html
>
>
> I grab the old 1388-#2, and give it a workout.
>
> http://keysan.com/ksu0358.htm
>
> Old school.
>
>
> Regards,
>
> Rich Koerner,
> Time Electronics.
> http://www.timeelect.com
>
> Specialists in Live Sound FOH Engineering,
> Music & Studio Production,
> Vintage Instruments, and Tube Amplifiers

Ha ha ha ha, good one Rich, but I already use Bic push-button plastic
pencils with 0.5mm leads, various coloured
0.2mm Uniball pens and various colored Bic Brite Liner
marker pens on graph paper for my own schematics and
layouts instead of CAD. However, I didn't design the
Demeter or the Bogen units. Did you design those units
and are trying to keep them big secrets?

Elvis Kabong wrote:
>
> "Rich Koerner" <richk@timeelect.com> wrote in message
> news:482C0A83.DAC6E416@timeelect.com...
> >
> >
> > Elvis Kabong wrote:
> >>
> >> Demeter VTMP-2A
> >>
> >> Bogen CHA33
> >>
> >> Googled and looked all over the place for the Demeter
> >> and Schematics Heaven didn't have that model Bogen.
> >>
> >> Any of you personally have a copy or know someone?
> >>
> >> If so, please let me know and I'll provide my real email address.
> >>
> >> Thanks,
> >>
> >> Ed
> >
> >
> >
> >
> >
> > Try here....
> >
> > http://www.filmtools.com/ticpen2510me.html
> >
> >
> > I grab the old 1388-#2, and give it a workout.
> >
> > http://keysan.com/ksu0358.htm
> >
> > Old school.
> >
> >
> > Regards,
> >
> > Rich Koerner,
> > Time Electronics.
> > http://www.timeelect.com
> >
> > Specialists in Live Sound FOH Engineering,
> > Music & Studio Production,
> > Vintage Instruments, and Tube Amplifiers
>


<snip>

> However, I didn't design the
> Demeter or the Bogen units. Did you design those units
> and are trying to keep them big secrets?

No, nothing like that.

I just start drawing the print that doesn't exist with my #2.

Most times, it's more exact with the present revisions included.


Regards,

Rich Koerner,
Time Electronics.
http://www.timeelect.com

Specialists in Live Sound FOH Engineering,
Music & Studio Production,
Vintage Instruments, and Tube Amplifiers

On May 15, 8:53 pm, Rich Koerner <ri...@timeelect.com> wrote:
> Elvis Kabong wrote:
>
> > "Rich Koerner" <ri...@timeelect.com> wrote in message
> >news:482C0A83.DAC6E416@timeelect.com...
>
> > > Elvis Kabong wrote:
>
> > >> Demeter VTMP-2A
>
> > >> Bogen CHA33
>
> > >> Googled and looked all over the place for the Demeter
> > >> and Schematics Heaven didn't have that model Bogen.
>
> > >> Any of you personally have a copy or know someone?
>
> > >> If so, please let me know and I'll provide my real email address.
>
> > >> Thanks,
>
> > >> Ed
>
> > > Try here....
>
> > >http://www.filmtools.com/ticpen2510me.html
>
> > > I grab the old 1388-#2, and give it a workout.
>
> > >http://keysan.com/ksu0358.htm
>
> > > Old school.
>
> > > Regards,
>
> > > Rich Koerner,
> > > Time Electronics.
> > >http://www.timeelect.com
>
> > > Specialists in Live Sound FOH Engineering,
> > >       Music & Studio Production,
> > > Vintage Instruments, and Tube Amplifiers
>
> <snip>
>
> > However, I didn't design the
> > Demeter or the Bogen units. Did you design those units
> > and are trying to keep them big secrets?
>
> No, nothing like that.
>
> I just start drawing the print that doesn't exist with my #2.
>
> Most times, it's more exact with the present revisions included.
>
> Regards,
>
> Rich Koerner,
> Time Electronics.http://www.timeelect.com
>
> Specialists in Live Sound FOH Engineering,
>        Music & Studio Production,
> Vintage Instruments, and Tube Amplifiers- Hide quoted text -
>
> - Show quoted text -

When I sign my paycheck I have a hard time making the lines of the X
cross.. so now.. drawing isnt my strong point.

"Rich Koerner" <richk@timeelect.com> wrote in message
news:482CDB27.29408C40@timeelect.com...
>
>
> Elvis Kabong wrote:
>>
>> "Rich Koerner" <richk@timeelect.com> wrote in message
>> news:482C0A83.DAC6E416@timeelect.com...
>> >
>> >
>> > Elvis Kabong wrote:
>> >>
>> >> Demeter VTMP-2A
>> >>
>> >> Bogen CHA33
>> >>
>> >> Googled and looked all over the place for the Demeter
>> >> and Schematics Heaven didn't have that model Bogen.
>> >>
>> >> Any of you personally have a copy or know someone?
>> >>
>> >> If so, please let me know and I'll provide my real email address.
>> >>
>> >> Thanks,
>> >>
>> >> Ed
>> >
>> >
>> >
>> >
>> >
>> > Try here....
>> >
>> > http://www.filmtools.com/ticpen2510me.html
>> >
>> >
>> > I grab the old 1388-#2, and give it a workout.
>> >
>> > http://keysan.com/ksu0358.htm
>> >
>> > Old school.
>> >
>> >
>> > Regards,
>> >
>> > Rich Koerner,
>> > Time Electronics.
>> > http://www.timeelect.com
>> >
>> > Specialists in Live Sound FOH Engineering,
>> > Music & Studio Production,
>> > Vintage Instruments, and Tube Amplifiers
>>
>
>
> <snip>
>
>> However, I didn't design the
>> Demeter or the Bogen units. Did you design those units
>> and are trying to keep them big secrets?
>
> No, nothing like that.
>
> I just start drawing the print that doesn't exist with my #2.
>
> Most times, it's more exact with the present revisions included.
>
>
> Regards,
>
> Rich Koerner,
> Time Electronics.
> http://www.timeelect.com
>
> Specialists in Live Sound FOH Engineering,
> Music & Studio Production,
> Vintage Instruments, and Tube Amplifiers

Well sure if it's working properly and there aren't any
burnt beyond recognition power supply resistors or
ay other components like these 2 units have.

BTW, before I got into electronics, every time I bought a
new piece of gear, I would write to the company and
request a schematic. Whenever I brought anything in
for repairs, I also brought in the schematic and the
tech guys loved me for it. They give me a discount since they
didn't have to order one and appreciated my consideration.

So sheeks, I'm not trying to preserve these units designs
on paper. I'm trying to repair them!

So can you help me or not?

Elvis Kabong wrote:
>
> "Rich Koerner" <richk@timeelect.com> wrote in message
> news:482CDB27.29408C40@timeelect.com...
> >
> >
> > Elvis Kabong wrote:
> >>
> >> "Rich Koerner" <richk@timeelect.com> wrote in message
> >> news:482C0A83.DAC6E416@timeelect.com...
> >> >
> >> >
> >> > Elvis Kabong wrote:
> >> >>
> >> >> Demeter VTMP-2A
> >> >>
> >> >> Bogen CHA33
> >> >>
> >> >> Googled and looked all over the place for the Demeter
> >> >> and Schematics Heaven didn't have that model Bogen.
> >> >>
> >> >> Any of you personally have a copy or know someone?
> >> >>
> >> >> If so, please let me know and I'll provide my real email address.
> >> >>
> >> >> Thanks,
> >> >>
> >> >> Ed
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > Try here....
> >> >
> >> > http://www.filmtools.com/ticpen2510me.html
> >> >
> >> >
> >> > I grab the old 1388-#2, and give it a workout.
> >> >
> >> > http://keysan.com/ksu0358.htm
> >> >
> >> > Old school.
> >> >
> >> >
> >> > Regards,
> >> >
> >> > Rich Koerner,
> >> > Time Electronics.
> >> > http://www.timeelect.com
> >> >
> >> > Specialists in Live Sound FOH Engineering,
> >> > Music & Studio Production,
> >> > Vintage Instruments, and Tube Amplifiers
> >>
> >
> >
> > <snip>
> >
> >> However, I didn't design the
> >> Demeter or the Bogen units. Did you design those units
> >> and are trying to keep them big secrets?
> >
> > No, nothing like that.
> >
> > I just start drawing the print that doesn't exist with my #2.
> >
> > Most times, it's more exact with the present revisions included.
> >
> >
> > Regards,
> >
> > Rich Koerner,
> > Time Electronics.
> > http://www.timeelect.com
> >
> > Specialists in Live Sound FOH Engineering,
> > Music & Studio Production,
> > Vintage Instruments, and Tube Amplifiers
>
> Well sure if it's working properly and there aren't any
> burnt beyond recognition power supply resistors or
> ay other components like these 2 units have.
>
> BTW, before I got into electronics, every time I bought a
> new piece of gear, I would write to the company and
> request a schematic. Whenever I brought anything in
> for repairs, I also brought in the schematic and the
> tech guys loved me for it. They give me a discount since they
> didn't have to order one and appreciated my consideration.
>
> So sheeks, I'm not trying to preserve these units designs
> on paper. I'm trying to repair them!
>
> So can you help me or not?



Ed, I draw a print to see on paper what the heck the ckt is, burnt resistors and all.

I then, figure out how the ckt works on paper.

Then, I grab the calculator, apply the theory, and crunch the numbers.

That's how I get the starting part values, when you need to know values.

I plug the unit in, and tweak for ckt function.

Having a variable metered 500 volt DC power supply on the bench saves time getting data from a unit
with a toasted power supply section with a ton of fried resistors. Substitute with the bench
supply, fire up stages one at a time while crunching ohm law.

Run the tube specs from the manuals. They tell you what voltages will keep a tube happy.

Ed, I can't even guess at the numbers of tube amps I've repaired without a print.

SS amps without a print, the parts population works against ya.

However, psychic connection helps in both cases.

When that fails, I call the psychic hot line for the answers.

http://www.certifiedpsychics.com/

Ask for Kornelia, she's hot.

Helped a friend of mine last year fix Limp Bizkit's amp.



Regards,

Rich Koerner,
Time Electronics.
http://www.timeelect.com

Specialists in Live Sound FOH Engineering,
Music & Studio Production,
Vintage Instruments, and Tube Amplifiers

On Thu, 15 May 2008 00:59:07 -0500, "Elvis Kabong"
<ampscience@tuneland.com> wrote:

>Demeter VTMP-2A
>
>Bogen CHA33
>
>Googled and looked all over the place for the Demeter
>and Schematics Heaven didn't have that model Bogen.
>
>Any of you personally have a copy or know someone?
>
>If so, please let me know and I'll provide my real email address.
>
>Thanks,
>
>Ed
>
Might check here...they have the operators manual but I am not sure
about the schematic...
http://music-electronics-forum.com/showthread.php?t=328

On May 15, 1:12 pm, J.P. <jpas...@hotmail.com> wrote:
> On Thu, 15 May 2008 00:59:07 -0500, "Elvis Kabong"
>
>
>
>
>
> <ampscie...@tuneland.com> wrote:
> >Demeter VTMP-2A
>
> >Bogen CHA33
>
> >Googled and looked all over the place for the Demeter
> >and Schematics Heaven didn't have that model Bogen.
>
> >Any of you personally have a copy or know someone?
>
> >If so, please let me know and I'll provide my real email address.
>
> >Thanks,
>
> >Ed
>
> Might check here...they have the operators manual but I am not sure
> about the schematic...http://music-electronics-forum.com/showthread.php?t=
=328- Hide quoted text -
>
> - Show quoted text -

I caved.. "needed" a schematic for a bogen ph-10. Started to try with
a quil and papyrus. After a couple of hours (realising I wasnt really
learning anything just tracing cables and component) I found the Sams
Photofact on ebay for 5$+ship. Does that make me a bad person? i guess
it does.. :D

On Thu, 15 May 2008 11:28:06 -0700 (PDT), DH82C <drew.rsm@gmail.com>
wrote:

>On May 15, 1:12 pm, J.P. <jpas...@hotmail.com> wrote:
>> On Thu, 15 May 2008 00:59:07 -0500, "Elvis Kabong"
>>
>>
>>
>>
>>
>> <ampscie...@tuneland.com> wrote:
>> >Demeter VTMP-2A
>>
>> >Bogen CHA33
>>
>> >Googled and looked all over the place for the Demeter
>> >and Schematics Heaven didn't have that model Bogen.
>>
>> >Any of you personally have a copy or know someone?
>>
>> >If so, please let me know and I'll provide my real email address.
>>
>> >Thanks,
>>
>> >Ed
>>
>> Might check here...they have the operators manual but I am not sure
>> about the schematic...http://music-electronics-forum.com/showthread.php?t28- Hide quoted text -
>>
>> - Show quoted text -
>
>I caved.. "needed" a schematic for a bogen ph-10. Started to try with
>a quil and papyrus. After a couple of hours (realising I wasnt really
>learning anything just tracing cables and component) I found the Sams
>Photofact on ebay for 5$+ship. Does that make me a bad person? i guess
>it does.. :D
Maybe smart if learning how to draw is not your forte'...you just kept
a part of a tree from being wasted...

Elvis Kabong wrote:
>
>
> Bogen CHA33
>
>

I have schematics for Bogen 100, and a Bogen 330,
and Stromsau33, as well as Carillon 35, and 75. Couple of
other to boot too.


After poking around some of of these old (PA)
amps, you be surprised how many of them share
similar/ or even identical schematics ... If your been in
and around Fenders, these look pretty much
the same if one can reverse - engineer layouts to
schematics.

ping if interested -> b24warbaby att yahoo dott com

"WB" <WB@here.com> wrote in message
news:482ca0ab$0$4074$bbae4d71@news.suddenlink.net...
> Elvis Kabong wrote:
>>
>>
>> Bogen CHA33
>>
>>
>
> I have schematics for Bogen 100, and a Bogen 330,
> and Stromsau33, as well as Carillon 35, and 75. Couple of
> other to boot too.
>
>
> After poking around some of of these old (PA)
> amps, you be surprised how many of them share
> similar/ or even identical schematics ... If your been in
> and around Fenders, these look pretty much
> the same if one can reverse - engineer layouts to
> schematics.
>
> ping if interested -> b24warbaby att yahoo dott com

Actually, on both units a power supply resistor is burnt severly. Someone
who worked on the Demeter already
replaced some high watt resistor with five 1 watt resistors
all in series and they are all burnt to hell. The Bogen has a
burnt supply resistor and I can only read 2 stripes on the
2 watt carbon comp. I normally don't work on PA or
recording gear (mostly guitar amps) so I really don't know
how many volts I should be generally seeing at these points
in the supplies, thus the request for the schemas.

On May 15, 4:44 pm, WB <W...@here.com> wrote:
> Elvis Kabong wrote:
>
> > Bogen CHA33
>
>   I have schematics for  Bogen 100, and a Bogen 330,
> and Stromsau33, as well as Carillon 35, and 75. Couple of
> other to boot too.
>
> After poking around some of of these old (PA)
> amps, you be surprised how many of them share
> similar/ or even identical schematics ... If your been in
> and around Fenders, these look pretty much
> the same if one can reverse - engineer layouts to
> schematics.
>
> ping if interested -> b24warbaby  att yahoo dott com

Jebus man....how many times I gotta "ping" you for the Carillon 70
schemo?