[Hallicrafters] SX-62 Sensitivity capacitor

[Jim Liles]

Chuck,
Do you have the change notes for that radio.  Would be interested if you do.

Kindest regards Jim K9AXN

-----Original Message----- 
From: Chuck McGregor
Sent: Thursday, March 26, 2015 8:34 AM
To: Richard Knoppow
Cc: hallicrafters at mailman.qth.net
Subject: Re: [Hallicrafters] SX-62 Sensitivity capacitor

C127, the 100mfd capacitor was added to the early SX-42 schematic, as
documented in change 16 in Hallicrafters  Service Hint #21 dated
October 20, 1947.  It was correctly added to the schematic, but on
some SX-42 parts lists it was erroneously listed as 100 or 110 mmf.

Service Hint #21 is in BAMA:
http://bama.edebris.com/manuals/hallicra/sx42/

-Chuck K7MCG

On Wed, Mar 25, 2015 at 11:22 PM, Richard Knoppow
<1oldlens1 at ix.netcom.com> wrote:
>       After looking at three versions of the handbook on BAMA it appears
> that there are both a 0.22 or 0.25uf and a 100 uf across the same point.
> The 100 uf is C-127  I can't make out why other than they may be 
> physically
> separated.  Very odd arrangement.  This appears to vary the screen grid
> voltage on V2.
>
> On 3/25/2015 8:24 PM, Waldo Magnuson wrote:
>>
>> Hi,
>>    I'm trying to straighten out a somewhat hacked SX-62 and have a
>> question about the Sensitivity Control bypass capacitor value.  My 
>> schematic
>> shows 0.22 uf (C24) but in both SX-62s I have (I have 2) there has been a
>> 100 uf capacitor plus the 0.22.  Has there been a suggested modification 
>> to
>> the C24 value? Thanks.
>> Skip W7WGM
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>
> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
>
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