That thread is a US standard 10x24 ... sometimes referred to as US coarse
thread.
Terry W6RU
----- Original Message -----
From: "Neil Carr G0JHC" <g0jhc@blueyonder.co.uk>
To: <amps@contesting.com>
Sent: Monday, January 26, 2004 11:33 PM
Subject: [Amps] YC156 fitting screws
>
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> I am trying to get hold of some screws for the YC156 tube,
> the 4 cathode and the 1 filament screw.
>
> Anything that isn't metric is hard to find these days over here.
>
> I have tried all the local Hams "non metric" screw junk boxes to no avail.
>
> Anyone know the thread? Or even have some?
>
> They are different to the 4 on the grid ring.
>
> Happy to pay for them +shipping.
>
> Help appreciated.
>
> 73 Neil G0JHC.
>
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>
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