[Amps] ARCO compression trimmer caps

[Paul Christensen]

Also, check with Bob Grinnell at Surplus Sales of Nebraska.  Their minimum
order amount may be less than R.F. Parts Company.

http://www.surplussales.com/Variables/Compression/CompCap1.html

-Paul, W9AC




----- Original Message ----- 
From: "Radio WC6W" <wc6w at juno.com>
To: <dezrat1242 at ispwest.com>; <amps at contesting.com>
Sent: Saturday, September 11, 2004 9:55 AM
Subject: Re: [Amps] ARCO compression trimmer caps


> On Sat, 11 Sep 2004 06:01:29 -0700 Bill Turner <dezrat1242 at 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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