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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 4th Apr 2024, 3:13 pm   #1
vosperd
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Default Marconi TF144H Thermocouple

The brittle wies have broken off on mine so now the thermocouple is u/s.
I see from previous posts that they were hard to source 10 years ago so I don't suppose there's much chance in finding one now.
I remember reading that someone has come up with a circuit to replace this but I haven't manage to find it yet.
Any help much appreciated.
Don m5aky
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Old 4th Apr 2024, 10:29 pm   #2
high_vacuum_house
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Default Re: Marconi TF144H Thermocouple

Do you have a picture of it?
I don't suppose it is possible to attempt to repair it using some conductive paint and some fine tinned copper wire to make a connection

Christopher Capener
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Old 5th Apr 2024, 8:08 am   #3
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Default Re: Marconi TF144H Thermocouple

Hi Christopher.
Thanks for the reply.
I have managed to solder to one of the wires on the side but the two wires on the top are too close together and they have both fractured flush with the glass.
Don
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Old 5th Apr 2024, 8:47 pm   #4
Alan Bain
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Default Re: Marconi TF144H Thermocouple

A picture would be useful. I've got a number of these in drawers from junk-boxes of other people that I have acquired, mostly STC but I think one or two acorn style ones from some Marconi gear.
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Old 6th Apr 2024, 9:28 am   #5
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Default Re: Marconi TF144H Thermocouple

OK, Sorted out the camera lead so here's the photo
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Old 6th Apr 2024, 8:06 pm   #6
Alan Bain
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Default Re: Marconi TF144H Thermocouple

I've got one that looks like that... see photo

Source and condition unknown but it seems to have 4 intact leads. If you think it might be useful send me a PM.

Alan
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Old 7th Apr 2024, 9:04 am   #7
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Default Re: Marconi TF144H Thermocouple

Hi Alan.pm sent.
I never found the article in spite of a few days of searching. Perhaps I dreamt it!
Don m5aky
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Old 7th Apr 2024, 3:40 pm   #8
Craig Sawyers
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Default Re: Marconi TF144H Thermocouple

Specs of the range attached

Craig
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Old 7th Apr 2024, 3:49 pm   #9
Craig Sawyers
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Default Re: Marconi TF144H Thermocouple

Suspect I downloaded that from this 2016 thread https://www.vintage-radio.net/forum/...d.php?t=123343

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