[Hallicrafters] SX-115/HT32 VFO Dead

[Duane Fischer, W8DBF]

Please post your suggestions to the list, as this is good information for all to
read. 	
	
Thank you.	


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From: Rocco Lardiere <lardiere at ix.netcom.com>
To: hallicrafters at mailman.qth.net
Subject: [Hallicrafters] SX-115/HT32 VFO Dead
Date: Monday, August 23, 2004 8:38 AM

Gents,

The VFO on my SX 115 was inoperative when I applied power after a few weeks
of inactivity.  The VFO is very similar to that in the HT-32 series.

I removed the bottom VFO shield.  All voltages are correct at the 6CB6 pins.
I checked with a Hi Z scope - no oscillation of the circuit - it's not one
of the buffering components.  I replaced the tube with a fresh one - no joy.
There is no evidence of anyone having made repairs/mods under the shield.
The main tuning caps were cleaned and De0xited a few years ago - there is no
obvious debris or other shorts visible.

I suspect one of the caps has gone bad - such as one of the temp
compensation caps.

Has anyone had a similar problem in the past and found a solution?  I hate
to disturb the wiring in this area needlessly but will do the surgery if it
is required.

73,

Rocco N6KN

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