[Hallicrafters] SX-101A Converter Subchassis

[Mark K3MSB]

This isn't a warble;  it's a significant shift in frequency;  could be
10 KHz , 20 Khz etc.

The calibartor signal, when switched in, is effected also.

Mark K3MSB

On Mon, Dec 8, 2008 at 6:53 PM, Gary <xfrmrs at roadrunner.com> wrote:
> 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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>