On Sat, 11 Sep 2004 06:01:29 -0700 Bill Turner <dezrat1242@ispwest.com>
writes:
> Frustration! I have pair of ARCO compression trimmers I want to use
> in a single-band amp in the input pi-network circuit and one of them
> has lost the mounting nut. This is a non-standard thread and even my
> well-stocked box of spare nuts and bolts comes up empty. The local
> hardware store has an extensive supply of US and metric nuts and
> still nothing. An experienced machinist friend guesses it might be a
> 12-40 thread, but he's not sure.
>
Hi Bill,
Sounds like you are dealing with a type 30 padder.
Your friend is correct about the size. The thread is standard,
albeit rare.
> Dan's Small Parts has the trimmer for sale with a note "NO MOUNTING
> NUT SUPPLIED..YOUR LOCAL HARDWARE STORE SHOULD HAVE THAT....".
>
> Yeah, right. :-)
I'll second that.
>
> Any one know what the thread is or where I can get one?
I tried looking for some of those myself (including an internet
search) a couple years ago with no success. I was even considering
making a few nuts from brass hex stock but, a 12-40 tap also proved
elusive, special order, and was quoted around $25.
>
> Thanks in advance,
>
> --
> 73, Bill W6WRT
73 & Good morning,
Marv WC6W
*
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