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Old 7th Jan 2020, 8:19 pm   #10
vosperd
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Join Date: Oct 2007
Location: Bristol, UK.
Posts: 440
Default Re: Hammarlund HQ-180A I.F. Help Sought

If you were reading the resistances with the transformer out of circuit and C153 is not mounted within the can then it probably isn't that.
However, it looks like the primary is between C and E and the secondary between A and D. I think you should be getting an infinity reading between D and E. and A and C but I can't see why you are not getting a low resistance between A and C as well.
Unless there are other components mounted withinn the can then only four connections are needed. I't's not uncommon for unused pins to be used as convenient terminals.
I'm not familiar with this receiver so I'm quite happy to be corrected on anything I've said.
Don m5aky
By the way the 0A2 is a 150V regulator looks like the plate of V3 is fed from that.

Last edited by vosperd; 7th Jan 2020 at 8:44 pm.
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