[Hallicrafters] Aligning a S-76

[Ken And Susan Hittson via Hallicrafters]

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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