[AMRadio] .02 replacement cap

Ross Stenberg k9cox at charter.net
Wed Oct 23 09:05:18 EDT 2013

I have removed that cap on two different Rangers. On one it was fine and on 
the other the audio would tend to break into oscillation. I believe Timtron 
makes note of this in his notes.

    73 Ross K9COX

-----Original Message----- 
From: Joe Roth
Sent: Wednesday, October 23, 2013 6:50 AM
To: Joe Roth ; amradio at mailman.qth.net
Subject: Re: [AMRadio] .02 replacement cap

1. The hum was unrelated. It was simply a bad contact on the 12AX7 tube 
2. I liked the audio response without the cap (better high end responce); 
looked better on the scope.
For fun I experimented with the orange drop cap and it works fine positioned 
either way (not polarity sensitive). Mark, SMB was correct.
Good dialog & insight. Thanks.
----- Original Message -----
From: Joe Roth
Sent: 10/22/13 07:39 AM
To: amradio at mailman.qth.net
Subject: Re: [AMRadio] .02 replacement cap

Great info guys. I will just remove the cap and see what the audio responce 
is like first. There was a 'foil side' on the original paper cap so maybe 
reversing the orange drop leads will help if the audio highs are too much 
without the cap in line. Not sure why the hum appeared, may be unrelated. 
And thanks for the justradios & hayseed supply sources - forgot all about 
them. 73

More information about the AMRadio mailing list

This page last updated 21 Feb 2018.