[Hallicrafters] SX-101A Converter Subchassis

[Gary]

Some of the SX-101 series radios have what I call a "cavity cap" in the osc 
section of the band switch. If the seal breaks on these (red substance), it 
causes the cap to move and it will change your frequency. I have even seen 
them so loose that just breathing on them will make a CW signal warble 
really bad.
Regards,
Gary
----- Original Message ----- 
From: "Mark K3MSB" <mark.k3msb at gmail.com>
To: "List Hallicrafters" <hallicrafters at mailman.qth.net>
Sent: Monday, December 08, 2008 6:48 PM
Subject: [Hallicrafters] SX-101A Converter Subchassis


Greetings --

I'm going to try and get the caps in the subchassis replaced over
Christmas.   I've a few questions.

1)  T2 and T5 contain a pair of 300 pf and 390 pf caps respectively;
I assume they're 10% 500V Silver Mica caps.

2) C206 is a 2.2 pf 10% ceramic.  I don't expect this to be bad;  Is
this one of those "dog bone" type caps?

I recapped my SX-101A about a year ago -- much peppier now, replaced
out of spec resistors.  I still need to do the filter switch caps and
the subchassis.

The radio decides to change frequency every now and then, and I can
typically "make it better" by changing the mode switch back and forth
a few times.

Any advise etc more than welcomed.

73 Mark K3MSB
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