Pinnacle problem

[itzalak2]

You re right! it has considered as 1m. Changing to 1 MEG works and amplifies!

Will check tomorrow the circuit again. Thanks for all to everybody.

[samhay]

You might also want to look at these:

http://www.geofex.com/article_folders/foolwfets/foolwfets.htm
http://www.geofex.com/Article_Folders/modmuamp/modmuamp.htm

[itzalak2]

Hi,

I found the problem!, it was a bad solder only!. Thanks to all for all your help.

1 Thing I see is that the gain pot acts like a limiter of distortion volume bat does not reduce gain. Is this normal?


Regards.

[PRR]

You *need* the upper cap to get gain. Otherwise the lower FET drives the upper FET for gain essentially unity.

Yes, many sims take "m" or "M" as milli. I have to type "Meg" to get a meg. If in doubt, type "1000K".

BTW: your sim shows "4.50e3A" battery current. This is 4,500 Amps!! More than a dozen of my tractor's starter-motors! This also suggests your sim is taking "1M" as "milli". (9V over 2milli-Ohm is 4,500 Amps.)

[itzalak2]

But is it usual the gain pot behavior? It works like a volume limiter of gain but doesn't' remove add distortion.

[PRR]

The signal is already distorted *before* it gets to that pot. Can't change flavor, only total amount.