[Hallicrafters] S-20R

[Richard Knoppow]

----- Original Message ----- 
From: "Bob Sullivan" <robert at isquare.com>
To: <hallicrafters at mailman.qth.net>
Sent: Saturday, April 19, 2014 9:14 AM
Subject: [Hallicrafters] S-20R


I have a S-20R who's oscillator refuses to oscillate on band 
4. Okay on other bands. I have replaced the oscillator coil 
and cleaned the switch; no change. The 10ohm resistor is 
okay. I have not changed the 6K8 (which works in another 
S-20R). I'm clearly overlooking something obvious - any 
suggestions?

73, Bob
WØYVA

    The 10 ohm resistor is on band 1, the broadcast band and 
is a parasitic stopper. Have you re-capped this receiver? If 
not that may be the fix. Check all the resistors around the 
6K8 but anything like a slightly leaky bypass cap could 
cause problems. Also make sure the trimmer caps are not 
shorting. I would try another 6K8 just to make sure.  Did 
the coil you replaced have problems, if not it would have 
been my last choice of something to replace.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com