RF punch T600-4 channel problem

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nonprof

Member
Joined 2011
Help is very much appreciated...

if HPF switch is selected and only one channel is connected this amp protects intermittently. Using both channels amps this works fine. You also notice a crossover frequency.

Shorting the +input and -input of one channel or touching it, this amp works fine.


Very much thankful...
 
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Perry Babin

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Joined 2003
bcae1.com
Connecting a 1000pf cap across the center conductor and the shield for each channel should eliminate the oscillating... Well it did when I had the same problem with a similar amp.

The resistors are connected to ground. They are not required.
 

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nonprof

Member
Joined 2011
Perry Babin said:
Connecting a 1000pf cap across the center conductor and the shield for each channel should eliminate the oscillating... Well it did when I had the same problem with a similar amp.

The resistors are connected to ground. They are not required.
Click to expand...

Thank you Perry. I've thought I have problem in coupling caps but can't find the caps. Touching them corrects the amp.
 
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