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echo: ham_tech
to: STAN BLACK
from: PAUL WILLIAMS
date: 1997-09-17 04:13:00
subject: 741 amp

Hi Stan Black, hope you are having a nice day
SB> In my mail today I got a new "Nuts and Volts" and it had an article on 
SB>how to use (you guessed it!) IC's to build audio amps.  First in line was
SB>the `LM386.
SB> From what I have seen, Ramsey really cheaped out and my 386 is probably 
SB>blown.
SB> Gonna change that first then If that doesn't work I'll hit the streets 
SB>in search of a 741 to build into an amp. 
 Since it does have the 386 as the audio out, you might try changing
the capacitor that's connected to pins 1 and 8.  With no cap installed
the gain is around 26dB, if you put a 15uF in it jumps to 46dB or so.
I think the max value you can use is either 100 or 1000uF.
 You might just have a bad cap.
 -=> Yours sincerely, Paul Williams KB5IVG <=-
... "No cheap and shlocky merchandising on the Promenade!" - Todd Sullivan
--- Terminate 4.00/Pro
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* Origin: Reality -- It's not even a nice place to visit. (1:387/510.5)

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