[Hallicrafters] Aligning a S-76

[Richard Knoppow]

      There is a different scan of the Hallicrafters manual at
http://jptronics.org/Hallicrafters/manuals/halli.s-76.pdf

        Its not higher rez but the illustrations may be clearer.
       The Sams manual is also on BAMA    This has the advantage of 
showing the test points on the schematic.


On 8/10/2015 8:28 PM, Ken And Susan Hittson via Hallicrafters wrote:
> Hi Jim
> I used  polyester film (yellow) capacitors on the bandwidth selector. All worked great the radio played old and clear. I took the 2nd mixer chassis off the main assembly, and replaced the two paper capacitors in there, along with two out of tolerance resistors, and the S-76 has been silent since then. I can detect a signal at T1, but I can no longer coax a sound out of the speaker. I replaced C20, C23, R20, and R 22. I checked the schematic, and the manuals and pics i took of the wires involved with the second mixer. I have tested tubes, and believe that I did not get all the wires I the correct position, but based on the schematic they are right.
> Thanks, and all advice is appreciated.
> Ken
>
>
>
>
>> On Aug 10, 2015, at 9:43 PM, Jim Liles <hallicrafterssr2000 at k9axn.com> wrote:
>>
>> Ken,
>>
>> What kind of caps did you use on the band width selector switch?
>>
>> Kindest regards Jim
>>
>> -----Original Message----- From: Ken And Susan Hittson via Hallicrafters
>> Sent: Friday, August 07, 2015 12:23 AM
>> To: Hallicrafters at mailman.qth.net
>> Subject: [Hallicrafters] Aligning a S-76
>>
>> Hi All
>> I am working on an S-76, which belongs to an old friend who has owned the radio since we were kids. I have recapped it, and replaced a couple of tubes which tested weak. Now I'm trying to align it, and am stuck on the 50hz if. I am using a .01 cap to isolate pin 1 of the 50hz if can (L6 on the Hallicrafters schematic), and cannot seem to get an unmodulated signal through. There is about 270vdc on that pin, so I have to couple to it through some method. Any advice is appreciated.
>> Ken
>> Ft Smith AR.
>>
>>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL