PYEQAC2 IF coil - UK Vintage Radio Repair and Restoration Discussion Forum

Tony_Sterling · 5th Dec 2021, 1:23 pm

Hi Chaps. I am restoring this receiver but have come upon an open circuit IF coil. the intermediate 127k/s. Their seems to be millions of turns of wire embedded in wax.No way
could i rewind this at my age . Is there anyway round this problem.thanks tony

Herald1360 · 7th Dec 2021, 12:47 pm

There are possibilities..... depending on how much of bodge is acceptable

If it's the secondary of the first IFT, you could simply replace it by RC coupling direct from the mixer anode

If it's the first IFT primary, swap it for the secondary, then as above.

Second IFT primary (possibly) replace primary with RF choke then couple IF anode to top of secondary via low value capacitor, try 10-50pF(?).

Second IFT secondary- replace by primary then as above.

No guarantees, realignment of IFs recommended, performance may suffer somewhat.

Ask Ed Dining for a rewind quote?

Good luck!

Tony_Sterling · 9th Dec 2021, 4:58 pm

H[ Chris Sorry for the delay in answering illness .Thanks for the info.which will be very usfull for future reference. In myjunkbox i found an old i,f, which is working well .once again thanks. tony

Herald1360 · 9th Dec 2021, 8:18 pm

That sounds like a better solution anyway.

Hope you're feeling better now.

Santé

Chris

5th Dec 2021, 1:23 pm	#1
Tony_Sterling Tetrode Join Date: Sep 2004 Location: Plumstead, London, UK. Posts: 76	PYEQAC2 IF coil Hi Chaps. I am restoring this receiver but have come upon an open circuit IF coil. the intermediate 127k/s. Their seems to be millions of turns of wire embedded in wax.No way could i rewind this at my age . Is there anyway round this problem.thanks tony __________________ taxitony

7th Dec 2021, 12:47 pm	#2
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: PYEQAC2 IF coil There are possibilities..... depending on how much of bodge is acceptable If it's the secondary of the first IFT, you could simply replace it by RC coupling direct from the mixer anode If it's the first IFT primary, swap it for the secondary, then as above. Second IFT primary (possibly) replace primary with RF choke then couple IF anode to top of secondary via low value capacitor, try 10-50pF(?). Second IFT secondary- replace by primary then as above. No guarantees, realignment of IFs recommended, performance may suffer somewhat. Ask Ed Dining for a rewind quote? Good luck! __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

9th Dec 2021, 4:58 pm	#3
Tony_Sterling Tetrode Join Date: Sep 2004 Location: Plumstead, London, UK. Posts: 76	Re: PYEQAC2 IF coil H[ Chris Sorry for the delay in answering illness .Thanks for the info.which will be very usfull for future reference. In myjunkbox i found an old i,f, which is working well .once again thanks. tony __________________ taxitony

9th Dec 2021, 8:18 pm	#4
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: PYEQAC2 IF coil That sounds like a better solution anyway. Hope you're feeling better now. Santé Chris __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O