[AMRadio] Capacitors

Bill Smith hbco2 at sbcglobal.net
Fri Dec 29 23:48:37 EST 2006

According to Hoyle (was he a ham?) use ceramic capacitors for bypass in the
front end of the receiver (RF, oscillator and mixer stages) and use tubulars
for bypass and coupling in the IF, bfo, audio and other low frequency

I've used tubulars throughout, too, and they work fine.  I am sure ceramics
would also, just can't bring myself to put those flimsy things throughout an
old receiver.  In fact, I've taken them out when found as replacements.
Long ago, heard that the inductance inherent in tubular capacitors was
factored-in when designing RF coils, but I seriously doubt it.

When replacing components, use the original gound points and component

73 de Bill, AB6MT
hbcs2 at sbcglobal.net

----- Original Message ----- 
From: Rick Brashear
To: AMRadio at mailman.qth.net
Sent: Friday, December 29, 2006 8:15 PM
Subject: [AMRadio] Capacitors

What type of capacitors I should use to replace the paper Astron and
West-Cap capacitors in the rf strip on the sp-600?  I have a good stock
of new Sprague Orange Drops or I can use ceramic disk.  I don't want to
have to do this again.  Of course, at my age, it's doubtful that will


AMRadio mailing list
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Partner Website: http://www.amfone.net
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:AMRadio at mailman.qth.net

More information about the AMRadio mailing list

This page last updated 14 Dec 2017.