[Hallicrafters] SX28 AVC.

[hallicraftersx28 at aol.com]

Brian
While you're at it,check the other silver micas inside the IF trasformer .If they're leaky ,that will kill the sensitivity of the rcvr.
last SX-28A I worked on,had to replace the silver micas in ALL of the IF transformers.
Nick







-----Original Message-----
From: Brian Goldsmith <brian.goldsmith at echo1.com.au>
To: hallicrafters at mailman.qth.net
Sent: Sat, Aug 28, 2010 12:11 am
Subject: [Hallicrafters] SX28 AVC.


Nick wrote:-
Think you've got V7 confused with V8.V7(6B8) is the S-meter amp. tube plus
nd detector behind the front panel. V8 (also 6B8) is the AVC amp. tube.
oth of the control grids of V5(6L7) and V8 are connected to IF transformer
1.
Probably ended up opening a GOOD transformer ,now you gonna have 'fun'
utting it back !
ick

****Nick,how correct you are about V8,I am a silly old fart!!
However,I did find the 500k resistor open circuit and the 270pF cap leaky so
t wasn't a total waste of time.
Thanks for your help,Brian G.
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