Cameron mod

Info for maintaining and tweaking your amp to perfection.

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chameleon
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Re: Cameron mod

Post by chameleon » Sat Jan 01, 2011 8:23 pm

You're right! Thanks and sorry, I read all the posts but I missed that phrase in this one!

novosibir wrote:
chameleon wrote:Larry, I'm really curious about the name for this schematic. :roll:
Just on the previous page:
univalve1234 wrote:
Triodinator wrote:Brotha? You Rock! :rock: If someone would make a layout?! Maybe we could put your name on it! Not really fair to M.C. to associate your design with his is it? It does sound bad assed on my PC spoeakers!

Thanks for the insight to your genius!
Thanks alot man , i cant get enough of this amp . I have 2 friends of mine that really want me to build them one now lol.
Lets call it the chameleon mod , still though inspired by marks awesome soundings mods i have to give him credit . Im sure the gurus here are laughing at such an easy mod but what can you do , sometimes simple sounds good !!!!!
Yeah, reading some more than just the 2-3 previous posts can help a lot sometimes 8)

Larry
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harddriver
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Re: Cameron mod

Post by harddriver » Sun Jan 02, 2011 2:31 pm

Hey univalve, nice sounding amp!

Is there a benefit or an overal reason why you used 500K pots instead of the normal 1MEG audio pots for your gain and volume controls?

I know Bogner uses them and well as Soldano in these positition.

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briango
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Re: Cameron mod

Post by briango » Mon Jan 03, 2011 3:50 am

A quick clip of the amp I was working on before this thread started, but none the less inspired from listening to clips. It is a 50watter that is switchable from Plexi/JCM800/AFD/Modern. This is just 3 gain stages with a footswitchable boost. Clips of the other modes are in my youtube channel.

[youtube]http://www.youtube.com/watch?v=hRkMobTHqsQ[/youtube]

nico21
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Re: Cameron mod

Post by nico21 » Mon Jan 03, 2011 5:48 am

all modes switchable ? how did you do?
what do you call modern?

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jerrydyer
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Re: Cameron mod

Post by jerrydyer » Mon Jan 03, 2011 12:32 pm

they use the 500 k and also dont go straight to ground. this is an area I havent seen discussed yet. lots of tone and gain shaping here.
vids.
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;

univalve1234
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Re: Cameron mod

Post by univalve1234 » Mon Jan 03, 2011 12:44 pm

I used 500k pots cause it sounded smoother and a bit darker too. I know the tonestack gets affected by that too but i just used my ear. The amp just sounded better. I even tried 250k for gain so feel free to experiment , im sure different amps call for different values to get the best results!!

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briango
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Re: Cameron mod

Post by briango » Mon Jan 03, 2011 12:50 pm

jerrydyer wrote:they use the 500 k and also dont go straight to ground. this is an area I havent seen discussed yet. lots of tone and gain shaping here.
Used as a variable resistor? I use that for some cathode bypass shaping. Do you have an example you can share Jerry?

Tone Junkie
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Re: Cameron mod

Post by Tone Junkie » Mon Jan 03, 2011 2:21 pm

Univalve 1234 which of Larry,s schematics were closer.Bill :scratch:

univalve1234
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Re: Cameron mod

Post by univalve1234 » Mon Jan 03, 2011 4:08 pm

Tone Junkie wrote:Univalve 1234 which of Larry,s schematics were closer.Bill :scratch:
:P
3rd one he posted is very close :wink:

ryu
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Re: Cameron mod

Post by ryu » Tue Jan 04, 2011 2:57 am

jerrydyer wrote:they use the 500 k and also dont go straight to ground. this is an area I havent seen discussed yet. lots of tone and gain shaping here.
can you tell us more please?
I had the bogner and the only difference I've seen is the 470k/470pf is after the gain pot, in the soldano what I remember was 470k/.0022 before the gain pot and 470k grid input after (of course)
nothing special (?)

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jerrydyer
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Re: Cameron mod

Post by jerrydyer » Tue Jan 04, 2011 11:53 am

No sorry
you should experiment here. Ive been trusted with certain things and my word is gold. Just play around in this area and youll be pretty inspired. :rock:
vids.
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;

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briango
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Re: Cameron mod

Post by briango » Tue Jan 04, 2011 7:19 pm

Earlier in this thread there is a picture with a cap across the output coupling caps...how would you calculate the rolloff?

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jerrydyer
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Re: Cameron mod

Post by jerrydyer » Wed Jan 05, 2011 5:34 pm

a cap across a cap. ? prob just trying to get the correct voltage ? ? I know dave likes lower voltage mylar caps, I think mylar as his preamp coupling caps. Little green guys have a nice crunch to em. Sure it wasnt something like that. They are really low voltage and some guys use em ain series to get the correct voltage. in parralel its just double the value if I remember correctly . provided they were the same. Just add them up.
vids.
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;

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briango
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Re: Cameron mod

Post by briango » Wed Jan 05, 2011 5:56 pm

Jerry,

I'm talking about the junction where the PI coupling caps meet the bias grid resistors before heading to the (typically orange/green) output tube grids. I saw what looked like a cap...maybe a silver mica??

Brian

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jerrydyer
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Re: Cameron mod

Post by jerrydyer » Wed Jan 05, 2011 6:13 pm

yeah the 47pf was double up? makes sense some guys like a 100pf 2 times 47 is almost up there.
vids.
http://www.youtube.com/user/jerrydyer?feature=mhw4" onclick="window.open(this.href);return false;
http://www.dui-specialist.com" onclick="window.open(this.href);return false;

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