[R-390] Clevite Filters WAS: R-390 IF in 390A

[Dennis L. Wade]

Gentlemen,

Thanks Tom for posting the article.  I've been 
considering this conversion for a while, of course, 
deck availability is an issue.

A related question comes to mind.  Most of us have 
heard about the Clevite ceramic filters that one 
contractor (I forget who) tried to use in a run of 
390A IF decks.  These were subsequently removed and 
the proper mechanical filters installed.

I remember looking at the bandpass curve of a typical 
ceramic filter and noticing it was much smoother over 
the top (less ringing?) and much gentler skirts than a 
mechanical filter.

Can anyone comment on the audio quality of a Clevite 
equipped 390A vs. the mechanical filter?  I know some 
have survived.

I have an almost full set of Clevite filters and was 
considering an experiment to answer that 
question...but if I can avoid that kind of surgery I 
will.
---------------
Dennis Wade
KG6ZI Carmichael, CA