[ARC5] WTB: 803 Socket

[Mark K3MSB]

Thanks Dave

I have some leeway in the physical size of the socket;  it's the mounting
holes that need to be the same.   Howie had a socket for me but the
mounting holes were too far apart.    I've located two sockets so far and
I've asked the sellers to measure the mounting hole distance.

If a suitable socket doesn't turn up, I'll look into fabricating some kind
of adapter plate.

Mark




On Sat, Mar 20, 2021 at 5:52 PM David Stinson <arc5 at ix.netcom.com> wrote:

> Hi, Mark.
> My GO-9 also had an 813 "shoe-horned" in,
> which I correct back to 803.   I don't
> understand the reasoning as the voltages
> in the GO-9 are above the screen max
> rating for an 813.  I think it has grid current
> issues as well, but maybe thinking of
> another "improvement."
>
> I found out (the hard way) that the 803 socket
> in the TBW/GO-9 is a "special" animal, smaller
> than the ones you usually see.  I was fortunate
> in that I picked-up a 60-cycle-fried GP-7 which
> had the correct smaller 803 socket.
> If you need, I will try to get to the socket
> and measure its dimensions.
> Here are two photos of the correct socket
> mounted.  The rubber grommets were gone,
> so I used faucet washers to replace them.
>
> https://photos.app.goo.gl/RY8CkdThjpgARyPDA
> https://photos.app.goo.gl/UzW4mPuY9h4n3gnAA
>
> The red paint is high-voltage corona dope because
> there were carbon tracks on the bottom of the
> socket.  I cleaned them best I could and doped
> the socket, and it seems to have worked OK.
>
> GL OM DE Dave AB5S
>
> On 3/20/2021 2:54 PM, Mark K3MSB wrote:
>
> I've decided to go ahead and replace the 813 in my TBW-5 with an 803 and
> need a tube socket for the 803.
>
> I measured the distance between mounting holes at about 1 7/8 inches on a
> side, perhaps a bit less.
>
> The existing ceramic socket for the 813 is 2 3/4 inches per side, but that
> is not a critical dimension for the 803 socket.  The mounting holes are.
>
> 73 Mark K3MSB
>
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