[R-390] FW: Troubleshooting Question

[w5or at comcast.net]

Forwarded for Tom who is having posting problems.  
Replies should go to the list or to
Tom mailto:r390a at bellsouth.net

__________________________________________________________________

Troubleshooting Quiz.  (quiz?)

One of the radios in the stable an AGC problem.  On strong AM  
signals, depending on the modulation, it gives me an an AGC  
response.  On certain types of music/voice - I listen to talk radio  
quite a bit - it clips on peaks, very quickly dumps AGC, momentarily  
increases gain then quickly settles back to where it was.  Again,  
this only happens with certain voice types, it doesn't happen with  
most types of music, it usually doesn't happen with rapid Spanish  
speech.  Do I really have a problem, or does this radio have Dallas'  
mod installed?  It seems to copy SSB very well compared to the other  
radios.

I've not removed the dust covers nor pulled the IF deck to confirm  
this, but monitoring the AGC line shows my ears are correct. I've  
only used this radio a few times since I've had it - and only on the  
hand bands.  I don't believe I've installed the Langford mod in any  
of my other radios, so I'm not familiar with it's behaviour on strong  
AM.

Merry Christmas All!

May Santa leave each of you a Helena Rubenstein

Tom NU4G