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-   -   Ultra TWIN Model R786 1953 (https://www.vintage-radio.net/forum/showthread.php?t=169105)

clockman 18th Jul 2020 4:00 pm

Ultra TWIN Model R786 1953
 
Hi is there any one in the Hertfordshire area who can test my valves in a working set 1C2 1F3 1FD9 1P11 I know it's a long shot but worth a try?

marconi_pete 19th Jul 2020 4:54 pm

Re: Ultra TWIN Model R786 1953
 
Hi,
I'm in north London (Angel Islington Area) so may be able to assist if it's not too far for you. Alternatively you can test the valve filaments out of the set with a regular multimeter set to ohms range and hold them against the first and last pins on the valve. (Either side of the larger gap.) if you get a resistance reading then the filaments are OK. No reading would usually imply that the filament is open circuit and therefore dead. If you wanted to do a full emission test then you would need a proper valve tester but the method above should prove the viability of the valve anyway.

Thanks,
Peter

clockman 21st Jul 2020 1:31 pm

Re: Ultra TWIN Model R786 1953
 
Thanks but now have tested the valves in another set and are all OK.


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