Single Channel Build Progress

technomancer":sfusyukd said:
So bumping this as I had a question about the preamp if you don't mind answering. I'm considering building something similar when I finish the Aldrich.

Am I looking at your layout correctly: looks like you inserted Gain 1 after the post 1A 22nF cap and before the 470k-2.2nF/470k voltage divider? Did you stick with the typical 1M audio? Also what did you end up going with for the clipping diodes in this one?

:rock:
the first voltage divider is a 68k/68k with a 1000nf cap paralleling
the 68k to ground. The pot is a 1M reverse audio pot. As for clippers I like 2n5400s for high gain an around 16-20 v zeners for mid gain
 
Ah ok. I see... missed your earlier post about the gain replacing the 470k/470k but just saw it. That makes sense then and I see how it works. Thanks :thumbsup:
 
Love reading all this technical stuff and build threads even though i have no idea what im reading. Would love to learn it someday and build some nice stuff. Keep up the good work.
 
scottosan":35rkggt6 said:
technomancer":35rkggt6 said:
So bumping this as I had a question about the preamp if you don't mind answering. I'm considering building something similar when I finish the Aldrich.

Am I looking at your layout correctly: looks like you inserted Gain 1 after the post 1A 22nF cap and before the 470k-2.2nF/470k voltage divider? Did you stick with the typical 1M audio? Also what did you end up going with for the clipping diodes in this one?

:rock:
the first voltage divider is a 68k/68k with a 1000nf cap paralleling
the 68k to ground. The pot is a 1M reverse audio pot. As for clippers I like 2n5400s for high gain an around 16-20 v zeners for mid gain
That's supposed to be 1000pF? :)
 
SpiderWars":17dijn8u said:
scottosan":17dijn8u said:
technomancer":17dijn8u said:
So bumping this as I had a question about the preamp if you don't mind answering. I'm considering building something similar when I finish the Aldrich.

Am I looking at your layout correctly: looks like you inserted Gain 1 after the post 1A 22nF cap and before the 470k-2.2nF/470k voltage divider? Did you stick with the typical 1M audio? Also what did you end up going with for the clipping diodes in this one?

:rock:
the first voltage divider is a 68k/68k with a 1000nf cap paralleling
the 68k to ground. The pot is a 1M reverse audio pot. As for clippers I like 2n5400s for high gain an around 16-20 v zeners for mid gain
That's supposed to be 1000pF? :)

I just figured that was what it was since the schem has 1nF and the Muratas seem to all be labeled in pF from the assortment I have here :LOL: :LOL:
 
technomancer":1ggcr1p0 said:
SpiderWars":1ggcr1p0 said:
scottosan":1ggcr1p0 said:
technomancer":1ggcr1p0 said:
So bumping this as I had a question about the preamp if you don't mind answering. I'm considering building something similar when I finish the Aldrich.

Am I looking at your layout correctly: looks like you inserted Gain 1 after the post 1A 22nF cap and before the 470k-2.2nF/470k voltage divider? Did you stick with the typical 1M audio? Also what did you end up going with for the clipping diodes in this one?

:rock:
the first voltage divider is a 68k/68k with a 1000nf cap paralleling
the 68k to ground. The pot is a 1M reverse audio pot. As for clippers I like 2n5400s for high gain an around 16-20 v zeners for mid gain
That's supposed to be 1000pF? :)

I just figured that was what it was since the schem has 1nF and the Muratas seem to all be labeled in pF from the assortment I have here :LOL: :LOL:
correction. Linear on the gains and reverse audio on the volumes
 
scottosan":1yq34alq said:
technomancer":1yq34alq said:
SpiderWars":1yq34alq said:
scottosan":1yq34alq said:
technomancer":1yq34alq said:
So bumping this as I had a question about the preamp if you don't mind answering. I'm considering building something similar when I finish the Aldrich.

Am I looking at your layout correctly: looks like you inserted Gain 1 after the post 1A 22nF cap and before the 470k-2.2nF/470k voltage divider? Did you stick with the typical 1M audio? Also what did you end up going with for the clipping diodes in this one?

:rock:
the first voltage divider is a 68k/68k with a 1000nf cap paralleling
the 68k to ground. The pot is a 1M reverse audio pot. As for clippers I like 2n5400s for high gain an around 16-20 v zeners for mid gain
That's supposed to be 1000pF? :)

I just figured that was what it was since the schem has 1nF and the Muratas seem to all be labeled in pF from the assortment I have here :LOL: :LOL:
correction. Linear on the gains and reverse audio on the volumes

Is there a benefit to running a 1M Linear for a gain pot? What does the 1Meg Reverse audio pot affect, I assume the taper is more gradual on these?
 
scottosan":64l73nqd said:
technomancer":64l73nqd said:
SpiderWars":64l73nqd said:
scottosan":64l73nqd said:
technomancer":64l73nqd said:
So bumping this as I had a question about the preamp if you don't mind answering. I'm considering building something similar when I finish the Aldrich.

Am I looking at your layout correctly: looks like you inserted Gain 1 after the post 1A 22nF cap and before the 470k-2.2nF/470k voltage divider? Did you stick with the typical 1M audio? Also what did you end up going with for the clipping diodes in this one?

:rock:
the first voltage divider is a 68k/68k with a 1000nf cap paralleling
the 68k to ground. The pot is a 1M reverse audio pot. As for clippers I like 2n5400s for high gain an around 16-20 v zeners for mid gain
That's supposed to be 1000pF? :)

I just figured that was what it was since the schem has 1nF and the Muratas seem to all be labeled in pF from the assortment I have here :LOL: :LOL:
correction. Linear on the gains and reverse audio on the volumes

How'd the linears work out for the gain?

Also was about to ask where you found a larger 1M reverse audio but then looked again and realized it looks like a 16mm Alpha.
 
technomancer":25r6ygar said:
scottosan":25r6ygar said:
technomancer":25r6ygar said:
SpiderWars":25r6ygar said:
scottosan":25r6ygar said:
technomancer":25r6ygar said:
So bumping this as I had a question about the preamp if you don't mind answering. I'm considering building something similar when I finish the Aldrich.

Am I looking at your layout correctly: looks like you inserted Gain 1 after the post 1A 22nF cap and before the 470k-2.2nF/470k voltage divider? Did you stick with the typical 1M audio? Also what did you end up going with for the clipping diodes in this one?

:rock:
the first voltage divider is a 68k/68k with a 1000nf cap paralleling
the 68k to ground. The pot is a 1M reverse audio pot. As for clippers I like 2n5400s for high gain an around 16-20 v zeners for mid gain
That's supposed to be 1000pF? :)

I just figured that was what it was since the schem has 1nF and the Muratas seem to all be labeled in pF from the assortment I have here :LOL: :LOL:
correction. Linear on the gains and reverse audio on the volumes

How'd the linears work out for the gain?

Also was about to ask where you found a larger 1M reverse audio but then looked again and realized it looks like a 16mm Alpha.
audio tapers will sound bright for most of.sweep. Because of the bright caps, the gains are more like bright controls and the linears provide more balance over that
 
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