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The BA-3 as preamp build guide
The BA-3 as preamp build guide
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Old Yesterday, 09:35 PM   #1141
Zen Mod is offline Zen Mod  Serbia
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The BA-3 as preamp build guide
gain measured ?
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Old Yesterday, 09:42 PM   #1142
Twst is offline Twst  Norway
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Quote:
Originally Posted by Zen Mod View Post
gain measured ?
Great idea!
0.7v in to 48v out

Should be about 36db if the calculator is correct.
Maybe its just ment to hiss when beeing a preamp
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Old Yesterday, 09:46 PM   #1143
MEPER is offline MEPER  Denmark
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That is a lot of gain…...hopefully too much…...even for a MoFo with no gain…..this will be too much…..
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Old Yesterday, 10:07 PM   #1144
Zen Mod is offline Zen Mod  Serbia
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The BA-3 as preamp build guide
Quote:
Originally Posted by Twst View Post
Great idea!
0.7v in to 48v out

Should be about 36db if the calculator is correct.
Maybe its just ment to hiss when beeing a preamp
so , that's the reason for hiss - way too much gain , while you need 12db or so for your needs

you made some systematic mistake (meaning both channels ) - most probably having wrong or mislabeled resistor in some position

recheck everything, report back
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Old Yesterday, 10:17 PM   #1145
Twst is offline Twst  Norway
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Great! I will tear it down looking for answers. The resistors came out of the same bags for both channels, so guess thats the reason for the systematic mistake..
I will report back another day, so don't wait up!
Thanks again!
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Old Yesterday, 10:47 PM   #1146
Twst is offline Twst  Norway
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I did infact take a few pictures during construction.
Can't seem to find anything wrong with the written values on the resistors. Guess there could be mislabeling, and then my best bet will be to lift resistors one by one till I find them?

Anyone with a stock but quiet one made gain measurements?
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Old Yesterday, 11:05 PM   #1147
Zen Mod is offline Zen Mod  Serbia
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The BA-3 as preamp build guide
regarding gain = from stock values , expect something as 10-ish gain .... which is around 20db

patience , my dear Watson ..... measuring and magnifier time
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