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Effect of Variac on Monoblocks
Re: Effect of Variac on Monoblocks
Wink wrote:
> Eeyore wrote:
> >jakdedert wrote:
> >> Eeyore wrote:
> >> > jakdedert wrote:
> >> >> Eeyore wrote:
> >> >>> Wink wrote:
> >> >>>
> >> >>>>> Why did you change the caps?
> >> >>>> When the stock Hafler 10 kufd Sangamos started to die several years
> >> >>>> ago, I replaced them with Musical Concepts 80V, 27 kufd LC-200s made
> >> >>>> by Chemi-con, and noticed immediately a deadening of the sound.
> >> >> Duh....
> >> >
> >> > Why the duh ?
> >>
> >> Duh = 'obvious'. If the caps were actually 'dying', then replacing them
> >> would improve the sound...same point you made below.
> >
> >'Improve' depends on subjectivity. Make different for sure. It seems the OP felt it was
> >inferior despite the fact, that's how the amps were designed.
> >
> >However his later comments make me think he may have disturbed something else if the sound
> >really deteriorated badly.
>
>
> No -- no large scale deterioration. Nothing was disturbed. The bass
> started to lose control on certain inputs at high spls. The rest of
> the spectrum seemed unaffected. It is curious, and it's been a while.
> I didn't document the failure scenario.
Hi 'Wink'. I'm pleased to see I haven't incurred your wrath with my 'anti-subjectivist'
comments.
The scenario you describe i.e at high SPL, correlates exactly with the predictable change in
clipping behaviour that one would experience with different VALUE capacitors (i.e the new ones
are back to stock original design value as opposed to the old ones which had lost their value).
Old electrolytic caps lose their value as the electrolyte dries out btw. Their ESR also
increases which may conceivably also have a measurable / audible effect.
Graham
Wink wrote:
> Eeyore wrote:
> >jakdedert wrote:
> >> Eeyore wrote:
> >> > jakdedert wrote:
> >> >> Eeyore wrote:
> >> >>> Wink wrote:
> >> >>>
> >> >>>>> Why did you change the caps?
> >> >>>> When the stock Hafler 10 kufd Sangamos started to die several years
> >> >>>> ago, I replaced them with Musical Concepts 80V, 27 kufd LC-200s made
> >> >>>> by Chemi-con, and noticed immediately a deadening of the sound.
> >> >> Duh....
> >> >
> >> > Why the duh ?
> >>
> >> Duh = 'obvious'. If the caps were actually 'dying', then replacing them
> >> would improve the sound...same point you made below.
> >
> >'Improve' depends on subjectivity. Make different for sure. It seems the OP felt it was
> >inferior despite the fact, that's how the amps were designed.
> >
> >However his later comments make me think he may have disturbed something else if the sound
> >really deteriorated badly.
>
>
> No -- no large scale deterioration. Nothing was disturbed. The bass
> started to lose control on certain inputs at high spls. The rest of
> the spectrum seemed unaffected. It is curious, and it's been a while.
> I didn't document the failure scenario.
Hi 'Wink'. I'm pleased to see I haven't incurred your wrath with my 'anti-subjectivist'
comments.
The scenario you describe i.e at high SPL, correlates exactly with the predictable change in
clipping behaviour that one would experience with different VALUE capacitors (i.e the new ones
are back to stock original design value as opposed to the old ones which had lost their value).
Old electrolytic caps lose their value as the electrolyte dries out btw. Their ESR also
increases which may conceivably also have a measurable / audible effect.
Graham
Re: Effect of Variac on Monoblocks
>> No -- no large scale deterioration. Nothing was disturbed. The bass
>> started to lose control on certain inputs at high spls. The rest of
>> the spectrum seemed unaffected. It is curious, and it's been a while.
>> I didn't document the failure scenario.
>
>Hi 'Wink'. I'm pleased to see I haven't incurred your wrath with my 'anti-subjectivist'
>comments.
>
>The scenario you describe i.e at high SPL, correlates exactly with the predictable change in
>clipping behaviour that one would experience with different VALUE capacitors (i.e the new ones
>are back to stock original design value as opposed to the old ones which had lost their value).
>Old electrolytic caps lose their value as the electrolyte dries out btw. Their ESR also
>increases which may conceivably also have a measurable / audible effect.
>Graham
I'm not really a subjectivist, more of an Objectivist with occasional
Subjectivist sympathies. In any case, all my wrath was incurred long
ago. None left.
I extracted all 4 old Sangamos from basement hell. Recall I have a 220
and 200. (I usually just say I have 2 - 220s to avoid tedium, like I'm
engaging in now.)
They were pulled in Feb '05. 2 marked "work, but questionable". The
other 2, "Bad".
WBQ 1 - 9700 ufd
WBQ 2 - 8000 ufd
BAD 1 - 7800 ufd
BAD 2 - 0.0082 ufd -- this one rattles
What to make of it? The story is actually more complicated than
originally reported. I was bi-amping at the time, using BW303s
($250/pr) and diy subs. The subs were spitting out the nasties so it
must have been that amp that keeled over and I simply decided to
replace all caps in both amps.
I don't know if the 3 still showing viable values should be reformed
before measurement. I doubt it, I think those values are probably
within tolerance, whatever that is.
You'd certainly expect something obnoxious from the rattler, severe
120 hz hum minimally. That wasn't the case. I was getting sporadic
spitting and popping as well, if I recall correctly.
It would be interesting to press the 2 - WBQs back into service for a
listen but am not crazy about the idea. I don't recall why I have
them marked "...But Questionable".
Sometime after cap replacement, I eventually lost 3 of the 4 total
channels, so other things may have been brewing.
I'll stop here lest I put you into a coma.
Dave
(Wink)
>> No -- no large scale deterioration. Nothing was disturbed. The bass
>> started to lose control on certain inputs at high spls. The rest of
>> the spectrum seemed unaffected. It is curious, and it's been a while.
>> I didn't document the failure scenario.
>
>Hi 'Wink'. I'm pleased to see I haven't incurred your wrath with my 'anti-subjectivist'
>comments.
>
>The scenario you describe i.e at high SPL, correlates exactly with the predictable change in
>clipping behaviour that one would experience with different VALUE capacitors (i.e the new ones
>are back to stock original design value as opposed to the old ones which had lost their value).
>Old electrolytic caps lose their value as the electrolyte dries out btw. Their ESR also
>increases which may conceivably also have a measurable / audible effect.
>Graham
I'm not really a subjectivist, more of an Objectivist with occasional
Subjectivist sympathies. In any case, all my wrath was incurred long
ago. None left.
I extracted all 4 old Sangamos from basement hell. Recall I have a 220
and 200. (I usually just say I have 2 - 220s to avoid tedium, like I'm
engaging in now.)
They were pulled in Feb '05. 2 marked "work, but questionable". The
other 2, "Bad".
WBQ 1 - 9700 ufd
WBQ 2 - 8000 ufd
BAD 1 - 7800 ufd
BAD 2 - 0.0082 ufd -- this one rattles
What to make of it? The story is actually more complicated than
originally reported. I was bi-amping at the time, using BW303s
($250/pr) and diy subs. The subs were spitting out the nasties so it
must have been that amp that keeled over and I simply decided to
replace all caps in both amps.
I don't know if the 3 still showing viable values should be reformed
before measurement. I doubt it, I think those values are probably
within tolerance, whatever that is.
You'd certainly expect something obnoxious from the rattler, severe
120 hz hum minimally. That wasn't the case. I was getting sporadic
spitting and popping as well, if I recall correctly.
It would be interesting to press the 2 - WBQs back into service for a
listen but am not crazy about the idea. I don't recall why I have
them marked "...But Questionable".
Sometime after cap replacement, I eventually lost 3 of the 4 total
channels, so other things may have been brewing.
I'll stop here lest I put you into a coma.
Dave
(Wink)
Re: Effect of Variac on Monoblocks
>Yeah, but 'ordinary' capacitors for a few bucks each don't 'sound as
>good'. $200 caps--identical in every way, but for appearance and price
>tag--'sound' better...or so the OP would have us believe.
No -- I've not claimed this. I've been a long BG skeptic but decided
to roll the dice. Unusual for me. If they make no substantial
improvement, I'll sell and move to something more conventional.
I like Rod Elliott's idea of multiple paralleled smaller caps.
I must say, I can't find an easy segue between corner rocks and wooden
knobs to cap design.
>Yeah, but 'ordinary' capacitors for a few bucks each don't 'sound as
>good'. $200 caps--identical in every way, but for appearance and price
>tag--'sound' better...or so the OP would have us believe.
No -- I've not claimed this. I've been a long BG skeptic but decided
to roll the dice. Unusual for me. If they make no substantial
improvement, I'll sell and move to something more conventional.
I like Rod Elliott's idea of multiple paralleled smaller caps.
I must say, I can't find an easy segue between corner rocks and wooden
knobs to cap design.
Re: Effect of Variac on Monoblocks
>Why does that not make sense to 'audiophiles'...and by what objective
>measurement were the originals starting to 'die'?
Loss of bass control. Serious enough to be quite objective. I
initially thought the surrounds on the woofers were coming unglued.
>Seriously, if the OP wants to use those 'bargain' $800 caps, perhaps he
>should build an entire new pair of blocs with those and the new
>transformers he's having custom built...and sell the originals. There
>are plenty of plans on the Web. Of course it sounds like money is not
>an object, so perhaps he could use the old ones as doorstops.
This is what I've done Jak, using John Hillig's driver cards. The caps
and xmfrs are the final additions. All that remains of the original
220's are chassis, mosfets, and xfmrs.
>Why does that not make sense to 'audiophiles'...and by what objective
>measurement were the originals starting to 'die'?
Loss of bass control. Serious enough to be quite objective. I
initially thought the surrounds on the woofers were coming unglued.
>Seriously, if the OP wants to use those 'bargain' $800 caps, perhaps he
>should build an entire new pair of blocs with those and the new
>transformers he's having custom built...and sell the originals. There
>are plenty of plans on the Web. Of course it sounds like money is not
>an object, so perhaps he could use the old ones as doorstops.
This is what I've done Jak, using John Hillig's driver cards. The caps
and xmfrs are the final additions. All that remains of the original
220's are chassis, mosfets, and xfmrs.
Re: Effect of Variac on Monoblocks
Wink wrote:
> >Why does that not make sense to 'audiophiles'...and by what objective
> >measurement were the originals starting to 'die'?
> Loss of bass control. Serious enough to be quite objective. I
> initially thought the surrounds on the woofers were coming unglued.
That sounds like something more serious. Do you really know what you're
doing poking around inside amps ?
What ELSE did you touch (possibly inadvertantly).
> >Seriously, if the OP wants to use those 'bargain' $800 caps, perhaps he
> >should build an entire new pair of blocs with those and the new
> >transformers he's having custom built...and sell the originals. There
> >are plenty of plans on the Web. Of course it sounds like money is not
> >an object, so perhaps he could use the old ones as doorstops.
> This is what I've done Jak, using John Hillig's driver cards. The caps
> and xmfrs are the final additions. All that remains of the original
> 220's are chassis, mosfets, and xfmrs.
Why on earth are you wasting your time mucking about with an ancient amp ?
Technology has moved on although I confess I have a soft spot for mosfet
amps. When really well designed and set up they have miniscule (high order)
crossover distortion compared to bipolars. Indeed one of my own mosfet
designs had vanishingly low THD and most of what could be measured was 2nd
harmonic which is sonically the least intrusive.
Graham
Wink wrote:
> >Why does that not make sense to 'audiophiles'...and by what objective
> >measurement were the originals starting to 'die'?
> Loss of bass control. Serious enough to be quite objective. I
> initially thought the surrounds on the woofers were coming unglued.
That sounds like something more serious. Do you really know what you're
doing poking around inside amps ?
What ELSE did you touch (possibly inadvertantly).
> >Seriously, if the OP wants to use those 'bargain' $800 caps, perhaps he
> >should build an entire new pair of blocs with those and the new
> >transformers he's having custom built...and sell the originals. There
> >are plenty of plans on the Web. Of course it sounds like money is not
> >an object, so perhaps he could use the old ones as doorstops.
> This is what I've done Jak, using John Hillig's driver cards. The caps
> and xmfrs are the final additions. All that remains of the original
> 220's are chassis, mosfets, and xfmrs.
Why on earth are you wasting your time mucking about with an ancient amp ?
Technology has moved on although I confess I have a soft spot for mosfet
amps. When really well designed and set up they have miniscule (high order)
crossover distortion compared to bipolars. Indeed one of my own mosfet
designs had vanishingly low THD and most of what could be measured was 2nd
harmonic which is sonically the least intrusive.
Graham
Re: Effect of Variac on Monoblocks
On Mon, 24 Mar 2008 21:14:57 +0000, Eeyore
<rabbitsfriendsandrelations@hotmail,com > wrote:
>
>
>Wink wrote:
>
>> >Why does that not make sense to 'audiophiles'...and by what objective
>> >measurement were the originals starting to 'die'?
>> Loss of bass control. Serious enough to be quite objective. I
>> initially thought the surrounds on the woofers were coming unglued.
>
>That sounds like something more serious. Do you really know what you're
>doing poking around inside amps ?
Nope, it was the caps. Changing them completely eliminated the
problem.
>What ELSE did you touch (possibly inadvertantly).
Well, I built the amps from kits almost 30 years ago, then applied
Hillig's fairly complex GX mod in the late 80s. They worked perfectly
for 20+ years as such. In the mean time I applied the Galo/Jung Pooge
5 mods to a Phillips DAC 960, built multiple line stages and speakers
including ESLs, perforated and wire stator types.
>
>> >Seriously, if the OP wants to use those 'bargain' $800 caps, perhaps he
>> >should build an entire new pair of blocs with those and the new
>> >transformers he's having custom built...and sell the originals. There
>> >are plenty of plans on the Web. Of course it sounds like money is not
>> >an object, so perhaps he could use the old ones as doorstops.
>> This is what I've done Jak, using John Hillig's driver cards. The caps
>> and xmfrs are the final additions. All that remains of the original
>> 220's are chassis, mosfets, and xfmrs.
>
>Why on earth are you wasting your time mucking about with an ancient amp ?
>Technology has moved on although I confess I have a soft spot for mosfet
>amps. When really well designed and set up they have miniscule (high order)
>crossover distortion compared to bipolars. Indeed one of my own mosfet
>designs had vanishingly low THD and most of what could be measured was 2nd
>harmonic which is sonically the least intrusive.
Do you even read my posts? I've retained the 134/49 mosfet pairs,
chassis, and xfmr. It isn't a Hafler anymore. No plans for bipolars,
though I've ordered double current Exicons.
Ancient amps: Have you heard a Marantz 8b, or a Futterman? The old
Pass A-40 still sounds pretty good, better than his Aleph 30.
On Mon, 24 Mar 2008 21:14:57 +0000, Eeyore
<rabbitsfriendsandrelations@hotmail,com > wrote:
>
>
>Wink wrote:
>
>> >Why does that not make sense to 'audiophiles'...and by what objective
>> >measurement were the originals starting to 'die'?
>> Loss of bass control. Serious enough to be quite objective. I
>> initially thought the surrounds on the woofers were coming unglued.
>
>That sounds like something more serious. Do you really know what you're
>doing poking around inside amps ?
Nope, it was the caps. Changing them completely eliminated the
problem.
>What ELSE did you touch (possibly inadvertantly).
Well, I built the amps from kits almost 30 years ago, then applied
Hillig's fairly complex GX mod in the late 80s. They worked perfectly
for 20+ years as such. In the mean time I applied the Galo/Jung Pooge
5 mods to a Phillips DAC 960, built multiple line stages and speakers
including ESLs, perforated and wire stator types.
>
>> >Seriously, if the OP wants to use those 'bargain' $800 caps, perhaps he
>> >should build an entire new pair of blocs with those and the new
>> >transformers he's having custom built...and sell the originals. There
>> >are plenty of plans on the Web. Of course it sounds like money is not
>> >an object, so perhaps he could use the old ones as doorstops.
>> This is what I've done Jak, using John Hillig's driver cards. The caps
>> and xmfrs are the final additions. All that remains of the original
>> 220's are chassis, mosfets, and xfmrs.
>
>Why on earth are you wasting your time mucking about with an ancient amp ?
>Technology has moved on although I confess I have a soft spot for mosfet
>amps. When really well designed and set up they have miniscule (high order)
>crossover distortion compared to bipolars. Indeed one of my own mosfet
>designs had vanishingly low THD and most of what could be measured was 2nd
>harmonic which is sonically the least intrusive.
Do you even read my posts? I've retained the 134/49 mosfet pairs,
chassis, and xfmr. It isn't a Hafler anymore. No plans for bipolars,
though I've ordered double current Exicons.
Ancient amps: Have you heard a Marantz 8b, or a Futterman? The old
Pass A-40 still sounds pretty good, better than his Aleph 30.
Re: Effect of Variac on Monoblocks
"Eeyore" <rabbitsfriendsandrelations@hotmail,com > wrote in
message news:47E819D1.1C73109F@hotmail,com
> Wink wrote:
>
>>> Why does that not make sense to 'audiophiles'...and by
>>> what objective measurement were the originals starting
>>> to 'die'?
>> Loss of bass control. Serious enough to be quite
>> objective. I initially thought the surrounds on the
>> woofers were coming unglued.
>
> That sounds like something more serious. Do you really
> know what you're doing poking around inside amps ?
>
> What ELSE did you touch (possibly inadvertantly).
Time to study up on the new golden driver cards, no?
Google on John Hillig...
"Eeyore" <rabbitsfriendsandrelations@hotmail,com > wrote in
message news:47E819D1.1C73109F@hotmail,com
> Wink wrote:
>
>>> Why does that not make sense to 'audiophiles'...and by
>>> what objective measurement were the originals starting
>>> to 'die'?
>> Loss of bass control. Serious enough to be quite
>> objective. I initially thought the surrounds on the
>> woofers were coming unglued.
>
> That sounds like something more serious. Do you really
> know what you're doing poking around inside amps ?
>
> What ELSE did you touch (possibly inadvertantly).
Time to study up on the new golden driver cards, no?
Google on John Hillig...
Re: Effect of Variac on Monoblocks
>Time to study up on the new golden driver cards, no?
>
>Google on John Hillig...
Golden driver cards? Explain.
The only notable thing a Google search reveals about John aside from
generally positive audio commentary is that his mother died last week,
but I knew this before seeing the obit.
I worship at the alter of John Hillig. This is what you assume of
course. Well -- It is true, I do.
>Time to study up on the new golden driver cards, no?
>
>Google on John Hillig...
Golden driver cards? Explain.
The only notable thing a Google search reveals about John aside from
generally positive audio commentary is that his mother died last week,
but I knew this before seeing the obit.
I worship at the alter of John Hillig. This is what you assume of
course. Well -- It is true, I do.
Re: Effect of Variac on Monoblocks
Wink wrote:
> >Time to study up on the new golden driver cards, no?
> >
> >Google on John Hillig...
>
> Golden driver cards? Explain.
>
> The only notable thing a Google search reveals about John aside from
> generally positive audio commentary is that his mother died last week,
> but I knew this before seeing the obit.
>
> I worship at the alter of John Hillig. This is what you assume of
> course. Well -- It is true, I do.
Can you tell us more about John Hillig and his mod ?
If you want some good advice on amplifier design other than from me, you
could go here .....
http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
Graham
Wink wrote:
> >Time to study up on the new golden driver cards, no?
> >
> >Google on John Hillig...
>
> Golden driver cards? Explain.
>
> The only notable thing a Google search reveals about John aside from
> generally positive audio commentary is that his mother died last week,
> but I knew this before seeing the obit.
>
> I worship at the alter of John Hillig. This is what you assume of
> course. Well -- It is true, I do.
Can you tell us more about John Hillig and his mod ?
If you want some good advice on amplifier design other than from me, you
could go here .....
http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
Graham
Re: Effect of Variac on Monoblocks
On Tue, 25 Mar 2008 22:44:56 +0000, Eeyore
<rabbitsfriendsandrelations@hotmail,com > wrote:
>
>
>Wink wrote:
>
>> >Time to study up on the new golden driver cards, no?
>> >
>> >Google on John Hillig...
>>
>> Golden driver cards? Explain.
>>
>> The only notable thing a Google search reveals about John aside from
>> generally positive audio commentary is that his mother died last week,
>> but I knew this before seeing the obit.
>>
>> I worship at the alter of John Hillig. This is what you assume of
>> course. Well -- It is true, I do.
>
>Can you tell us more about John Hillig and his mod ?
>
>If you want some good advice on amplifier design other than from me, you
>could go here .....
> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
>
>Graham
>
>
>
Better still, buy the book and really understand what he has to say.
His forensic deconstruction of the amplifier and its modes of
distortion is unequalled.
d
--
Pearce Consulting
http :// www .pearce.uk,com
On Tue, 25 Mar 2008 22:44:56 +0000, Eeyore
<rabbitsfriendsandrelations@hotmail,com > wrote:
>
>
>Wink wrote:
>
>> >Time to study up on the new golden driver cards, no?
>> >
>> >Google on John Hillig...
>>
>> Golden driver cards? Explain.
>>
>> The only notable thing a Google search reveals about John aside from
>> generally positive audio commentary is that his mother died last week,
>> but I knew this before seeing the obit.
>>
>> I worship at the alter of John Hillig. This is what you assume of
>> course. Well -- It is true, I do.
>
>Can you tell us more about John Hillig and his mod ?
>
>If you want some good advice on amplifier design other than from me, you
>could go here .....
> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
>
>Graham
>
>
>
Better still, buy the book and really understand what he has to say.
His forensic deconstruction of the amplifier and its modes of
distortion is unequalled.
d
--
Pearce Consulting
http :// www .pearce.uk,com
Re: Effect of Variac on Monoblocks
"Don Pearce" <nospam@nospam,com > wrote in message
news:47eb839b.476353406@news.plus,net
> On Tue, 25 Mar 2008 22:44:56 +0000, Eeyore
> <rabbitsfriendsandrelations@hotmail,com > wrote:
>
>>
>>
>> Wink wrote:
>>
>>>> Time to study up on the new golden driver cards, no?
>>>>
>>>> Google on John Hillig...
>>>
>>> Golden driver cards? Explain.
>>>
>>> The only notable thing a Google search reveals about
>>> John aside from generally positive audio commentary is
>>> that his mother died last week, but I knew this before
>>> seeing the obit.
>>>
>>> I worship at the alter of John Hillig. This is what you
>>> assume of course. Well -- It is true, I do.
>>
>> Can you tell us more about John Hillig and his mod ?
>>
>> If you want some good advice on amplifier design other
>> than from me, you could go here .....
>> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
> Better still, buy the book and really understand what he
> has to say. His forensic deconstruction of the amplifier
> and its modes of distortion is unequalled.
Agreed. If only I had that information at hand back in the early 90s when I
was hot to build a super power amp.
"Don Pearce" <nospam@nospam,com > wrote in message
news:47eb839b.476353406@news.plus,net
> On Tue, 25 Mar 2008 22:44:56 +0000, Eeyore
> <rabbitsfriendsandrelations@hotmail,com > wrote:
>
>>
>>
>> Wink wrote:
>>
>>>> Time to study up on the new golden driver cards, no?
>>>>
>>>> Google on John Hillig...
>>>
>>> Golden driver cards? Explain.
>>>
>>> The only notable thing a Google search reveals about
>>> John aside from generally positive audio commentary is
>>> that his mother died last week, but I knew this before
>>> seeing the obit.
>>>
>>> I worship at the alter of John Hillig. This is what you
>>> assume of course. Well -- It is true, I do.
>>
>> Can you tell us more about John Hillig and his mod ?
>>
>> If you want some good advice on amplifier design other
>> than from me, you could go here .....
>> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
> Better still, buy the book and really understand what he
> has to say. His forensic deconstruction of the amplifier
> and its modes of distortion is unequalled.
Agreed. If only I had that information at hand back in the early 90s when I
was hot to build a super power amp.
Re: Effect of Variac on Monoblocks
Don Pearce wrote:
> Eeyore wrote:
>>
>>If you want some good advice on amplifier design other than from me, you
>>could go here .....
>> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
>
>Better still, buy the book and really understand what he has to say.
>His forensic deconstruction of the amplifier and its modes of
>distortion is unequalled.
Bought his book. Built (and use) his preamp
Don Pearce wrote:
> Eeyore wrote:
>>
>>If you want some good advice on amplifier design other than from me, you
>>could go here .....
>> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
>
>Better still, buy the book and really understand what he has to say.
>His forensic deconstruction of the amplifier and its modes of
>distortion is unequalled.
Bought his book. Built (and use) his preamp
Re: Effect of Variac on Monoblocks
>>If you want some good advice on amplifier design other than from me, you
>>could go here .....
>> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
>>
>>Graham
>Better still, buy the book and really understand what he has to say.
>His forensic deconstruction of the amplifier and its modes of
>distortion is unequalled.
I've printed out his Science and Subjectivism in Audio treatise. Look
forward every word.
Dave
>>If you want some good advice on amplifier design other than from me, you
>>could go here .....
>> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
>>
>>Graham
>Better still, buy the book and really understand what he has to say.
>His forensic deconstruction of the amplifier and its modes of
>distortion is unequalled.
I've printed out his Science and Subjectivism in Audio treatise. Look
forward every word.
Dave
Re: Effect of Variac on Monoblocks
On Tue, 25 Mar 2008 22:44:56 +0000, Eeyore
<rabbitsfriendsandrelations@hotmail,com > wrote:
>
>
>Wink wrote:
>
>> >Time to study up on the new golden driver cards, no?
>> >
>> >Google on John Hillig...
>>
>> Golden driver cards? Explain.
>>
>> The only notable thing a Google search reveals about John aside from
>> generally positive audio commentary is that his mother died last week,
>> but I knew this before seeing the obit.
>>
>> I worship at the alter of John Hillig. This is what you assume of
>> course. Well -- It is true, I do.
>
>Can you tell us more about John Hillig and his mod ?
Yes, sack time is upon. I will tomorrow Graham.
>
>If you want some good advice on amplifier design other than from me, you
>could go here .....
> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
Ahhh..quick scan suggests an excellent site. Thanks.
I AM interested in your amp thoughts Graham. Could you describe, say,
your ultimate amplifier in a few paragraphs, or as many as required.
Or anything that comes to mind: General guidelines and the like.
Whatever strikes you.
Perhaps simply some free association on amp design.
Dave
On Tue, 25 Mar 2008 22:44:56 +0000, Eeyore
<rabbitsfriendsandrelations@hotmail,com > wrote:
>
>
>Wink wrote:
>
>> >Time to study up on the new golden driver cards, no?
>> >
>> >Google on John Hillig...
>>
>> Golden driver cards? Explain.
>>
>> The only notable thing a Google search reveals about John aside from
>> generally positive audio commentary is that his mother died last week,
>> but I knew this before seeing the obit.
>>
>> I worship at the alter of John Hillig. This is what you assume of
>> course. Well -- It is true, I do.
>
>Can you tell us more about John Hillig and his mod ?
Yes, sack time is upon. I will tomorrow Graham.
>
>If you want some good advice on amplifier design other than from me, you
>could go here .....
> http :// www .dself.dsl.pipex,com /ampins/ampdept.htm
Ahhh..quick scan suggests an excellent site. Thanks.
I AM interested in your amp thoughts Graham. Could you describe, say,
your ultimate amplifier in a few paragraphs, or as many as required.
Or anything that comes to mind: General guidelines and the like.
Whatever strikes you.
Perhaps simply some free association on amp design.
Dave
Re: Effect of Variac on Monoblocks
A new stock DH-200 or 220 doesn't sound dead.
Science has the potential to have all the answers. It doesn't follow
that is has all the answers currently.
I think YOU think you know what you're talking about, but really
don't. And I suspect you know this.
>
>
>Wink wrote:
>
>> >Why did you change the caps?
>> When the stock Hafler 10 kufd Sangamos started to die several years
>> ago, I replaced them with Musical Concepts 80V, 27 kufd LC-200s made
>> by Chemi-con, and noticed immediately a deadening of the sound.
>
>Simple reason for that, it's how the amp originally sounded when the Sangamos
>were 'fresh'.
>
>As caps 'die', their capacitance reduces and this affects the regulation of the
>power supply and consequently can influence how it treats large dynamics.
>
>All you did was restore the amp to 'original condition' but didn't like the
>result.
>
>If perhaps you'd fitted 3300 or 4700uF caps in place of 10,000uF you may have
>preferred how it sounded.
>
>Science DOES have the answers you see, but you really do need to know your onions
>and have LOTS of experience to understand this stuff. Random component
>substitution is one of the dumbest things out there but a lot of crooks make good
>money out of you from it.
>
>
>Graham
A new stock DH-200 or 220 doesn't sound dead.
Science has the potential to have all the answers. It doesn't follow
that is has all the answers currently.
I think YOU think you know what you're talking about, but really
don't. And I suspect you know this.
>
>
>Wink wrote:
>
>> >Why did you change the caps?
>> When the stock Hafler 10 kufd Sangamos started to die several years
>> ago, I replaced them with Musical Concepts 80V, 27 kufd LC-200s made
>> by Chemi-con, and noticed immediately a deadening of the sound.
>
>Simple reason for that, it's how the amp originally sounded when the Sangamos
>were 'fresh'.
>
>As caps 'die', their capacitance reduces and this affects the regulation of the
>power supply and consequently can influence how it treats large dynamics.
>
>All you did was restore the amp to 'original condition' but didn't like the
>result.
>
>If perhaps you'd fitted 3300 or 4700uF caps in place of 10,000uF you may have
>preferred how it sounded.
>
>Science DOES have the answers you see, but you really do need to know your onions
>and have LOTS of experience to understand this stuff. Random component
>substitution is one of the dumbest things out there but a lot of crooks make good
>money out of you from it.
>
>
>Graham
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