Amp has 2xEL74, 2xAX7's, & 5U4,,,,
🕉
Thnx in advance
Possible Master or Gain Increase Mod?
Moderators: pompeiisneaks, Colossal
Possible Master or Gain Increase Mod?
Hi all~ I'm not sure if that more detailed one is for my amp, but that preamp tube setup is... Are there any feasible thoughts on a functional, NON tone sucking master for it? OR, a component's or 2 or 3 values to change to it give much more gain at a lower level?
Amp has 2xEL74, 2xAX7's, & 5U4,,,,
🕉
Thnx in advance
Amp has 2xEL74, 2xAX7's, & 5U4,,,,
🕉
Thnx in advance
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pompeiisneaks
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Re: Possible Master or Gain Increase Mod?
Please do not create duplicate threads. I'm deleting the other. I can see your images just fine.
I don't really understand what you're asking, so i didn't respond.
~Phil
I don't really understand what you're asking, so i didn't respond.
~Phil
tUber Nerd!
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Stevem
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Re: Possible Master or Gain Increase Mod?
On V1A why do you have a resistor to ground off of the cathode bypass cap?
Also you need to post up a bigger better picture of the schematic and you layout drawing please!
Also you need to post up a bigger better picture of the schematic and you layout drawing please!
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Re: Possible Master or Gain Increase Mod?
The dupe post was an error, Phil. Kindly forgive, but my question was if the only schemes available to me, tell you anything about the possibility of inserting a master, or some mod for earlier breakup (w/o using those tone-suck attenuators)?
Thnx again, & be well~
🕉
Thnx again, & be well~
🕉
Re: Possible Master or Gain Increase Mod?
Stevem,, this is how the amp was built, with that V1A thing you mentioned,,, I do not have a clearer picture of the entire layout,,, I'm lucky to have this much info.
Thnx
Thnx
Re: Possible Master or Gain Increase Mod?
So joining schematic and layout we can say that the amp is:
100k & 1k||(680n + 20k)
10n to 1Mlog vol
100k & 1k5||22u
Tone stack
Loop
Paraphase PI
Power tubes
100k & 1k||(680n + 20k)
10n to 1Mlog vol
100k & 1k5||22u
Tone stack
Loop
Paraphase PI
Power tubes
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thetragichero
- Posts: 478
- Joined: Tue Sep 10, 2019 7:46 pm
Re: Possible Master or Gain Increase Mod?
can you upload the schematic you took a screenshot of instead of the screenshot? zooming in it looks like 
all pixelated
all pixelatedPRR wrote: Plotting loadlines is only for the truly desperate, or terminally bored.
Re: Possible Master or Gain Increase Mod?
Convert the paraphase into a concertina and use the free triode, get rid of the loop and squeeze some more gain.
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Stevem
- Posts: 5144
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
Re: Possible Master or Gain Increase Mod?
Those mods will help gain wise, but the end result is the amp will still be nearly just as unusable loud for him!
He needs a master volume, or to power scale the amp which requires a master volume anyway!
The third thing would be to try a good sounding distortion stomp box in that non buffered effects loop, or just in front of the amp to begin with,
He needs a master volume, or to power scale the amp which requires a master volume anyway!
The third thing would be to try a good sounding distortion stomp box in that non buffered effects loop, or just in front of the amp to begin with,
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Re: Possible Master or Gain Increase Mod?
Get a 50w L-pad from Amazon and use as speaker attenuator.
I build and repair tube amps. http://amps.monkeymatic.com