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Philco 38-116 Code 121
#9

Hi Group:
I have an open primary on my audio interstage transformer - Philco part # 32-7865N.  The secondaries test fine. I am checking with Heybour to see what the cost would be to have one recreated as Gary does not have one on hand at PTOP. while I am waiting on heybour, I thought I would take a shot at Ron's modification B to the audio interstage transformer when the primary is bad. Below is my sketch with Mondial's corrections noted above (I deleted the original picture he references since it was not accurate):

   

I have also been talking with Gary at PTOP. I mentioned I was planning to do mod B and he didn't think that was the best route. Here is what he had to say:

"Not sure if that is the best way as it is a single plate to push-pull grid DRIVER circuit and not just a plain interstage audio coupling circuit." Gary suggests a DRIVER type transformer and says the spec's are not too critical on type if I am just trying to get it working.  I would like it to work the best it can given i don't have a spare audio interstage transformer (the primary was open on the parts set audio inter. transformer I have too).

What do you guys thinks?  Thanks for your help  - it is really appreciated! -- Andy

Andy Sorrell
Palmyra, Virginia


Messages In This Thread
Philco 38-116 Code 121 - by AVSorrell - 02-16-2017, 12:05 PM
RE: Philco 38-116 Code 121 - by Mondial - 02-16-2017, 12:49 PM
RE: Philco 38-116 Code 121 - by Chris h - 02-16-2017, 01:29 PM
RE: Philco 38-116 Code 121 - by morzh - 02-16-2017, 03:26 PM
RE: Philco 38-116 Code 121 - by AVSorrell - 02-17-2017, 05:17 AM
RE: Philco 38-116 Code 121 - by Chris h - 02-18-2017, 10:02 PM
RE: Philco 38-116 Code 121 - by AVSorrell - 03-27-2017, 11:10 AM
RE: Philco 38-116 Code 121 - by Mondial - 04-02-2017, 01:24 PM
RE: Philco 38-116 Code 121 - by AVSorrell - 04-03-2017, 10:57 AM
RE: Philco 38-116 Code 121 - by Mondial - 04-03-2017, 03:52 PM
RE: Philco 38-116 Code 121 - by AVSorrell - 04-04-2017, 04:22 AM
RE: Philco 38-116 Code 121 - by Mondial - 04-04-2017, 07:48 AM
RE: Philco 38-116 Code 121 - by AVSorrell - 04-05-2017, 03:02 PM
RE: Philco 38-116 Code 121 - by Radioroslyn - 04-05-2017, 07:33 PM
RE: Philco 38-116 Code 121 - by Ron Ramirez - 04-06-2017, 10:39 AM
RE: Philco 38-116 Code 121 - by AVSorrell - 04-14-2017, 11:06 AM



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