Worth salvaging trimmer capacitors? (Actually IF Transformers). - UK Vintage Radio Repair and Restoration Discussion Forum

Uncle Bulgaria · 29th Mar 2020, 8:31 pm

At least, I think that's what these are. I'm stripping out some old boards and wondered about the efficacy of these and whether it's worth retaining them. The hardware, capacitors and resistors I can use, but I haven't delved into RF yet.

ms660 · 29th Mar 2020, 8:34 pm

Those look like IF transformers (adjustable inductors)

Lawrence.

Cobaltblue · 29th Mar 2020, 8:35 pm

The picture shows IF cans

Yes worth saving if your going to the trouble

Cheers

Mike T

Uncle Bulgaria · 29th Mar 2020, 8:37 pm

Thanks chaps. Of course, shielded inductors. Thanks. I'm having isolation fun with the Magnastat!

Andrew2 · 31st Mar 2020, 3:03 pm

Careful with those, I recall they have a paxolin/srbp base and when heated the pins will pull out if you are not very gentle. Sucking or wicking all solder off before attemting any 'pull' is recommended (at least by me).

Refugee · 31st Mar 2020, 8:49 pm

I would cut the old board up with the coils still in it and make each IF coil into an osciillator tuned to one of the common IF frequencies and fit any old transistor out of a modern throw away gadget in .
Some people just keep the slugs out of them if they have not been chewed up.

29th Mar 2020, 8:31 pm	#1
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Worth salvaging trimmer capacitors? (Actually IF Transformers). At least, I think that's what these are. I'm stripping out some old boards and wondered about the efficacy of these and whether it's worth retaining them. The hardware, capacitors and resistors I can use, but I haven't delved into RF yet. Attached Thumbnails

29th Mar 2020, 8:34 pm	#2
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Worth salvaging trimmer capacitors? Those look like IF transformers (adjustable inductors) Lawrence.

29th Mar 2020, 8:35 pm	#3
Cobaltblue Moderator Join Date: Dec 2010 Location: Exeter, Devon and Poole, Dorset UK. Posts: 6,878	Re: Worth salvaging trimmer capacitors? The picture shows IF cans Yes worth saving if your going to the trouble Cheers Mike T __________________ Invisible airwaves crackle with life or at least they used to Mike T BVWS member. www.cossor.co.uk

29th Mar 2020, 8:37 pm	#4
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Re: Worth salvaging trimmer capacitors? Thanks chaps. Of course, shielded inductors. Thanks. I'm having isolation fun with the Magnastat!

31st Mar 2020, 3:03 pm	#5
Andrew2 Nonode Join Date: Mar 2010 Location: Dukinfield, Cheshire, UK. Posts: 2,038	Re: Worth salvaging trimmer capacitors? (Actually IF Transformers). Careful with those, I recall they have a paxolin/srbp base and when heated the pins will pull out if you are not very gentle. Sucking or wicking all solder off before attemting any 'pull' is recommended (at least by me). __________________ Andy G1HBE.

31st Mar 2020, 8:49 pm	#6
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,554	Re: Worth salvaging trimmer capacitors? (Actually IF Transformers). I would cut the old board up with the coils still in it and make each IF coil into an osciillator tuned to one of the common IF frequencies and fit any old transistor out of a modern throw away gadget in . Some people just keep the slugs out of them if they have not been chewed up.