[R-390] Electro s Nah relay base/plug!

[Barry]

Todd,

That's right and something I hadn't considered until earlier today.  One
thing I thought might work is to remove the "spline" from the octal stem.
You'd have to be very careful to plug them in with the correct orientation,
but given that interference issues are already present, it might not be too
much of an issue.

They used to make octal adapters that fit on older tubes where the orienting
stem had broken off.  The adapter has 8 holes which slide over the tube's
pins and you can choose from 8 different "orientations".  A little epoxy to
hold it in place and that might be a workable solution albeit an expensive
one considering the cost of the relay holder, replacement stem, and caps.
But, hey, it's just money.  They'll print more.

Barry - N4BUQ

----- Original Message ----- 
From: <ToddRoberts2001 at aol.com>
To: <r-390 at mailman.qth.net>
Sent: Wednesday, August 17, 2005 4:27 PM
Subject: Re: [R-390] Electro s Nah relay base/plug!


> In a message dated 8/17/2005 11:28:40 AM Eastern Standard Time,
n4buq at aol.com
> writes:
> Joe,
> Good method.  Do you have a source for relay plugs and covers?  I found
some
> ideal-looking candidates at <http://www.keyelco.com/pdfs/p102.pdf> but I
> can't find anyone who stocks them for online retail sales.
> Barry - N4BUQ
>
> Barry,
>        One thing to keep in mind about the square-base Octal Relay plugs
and
> covers. If you notice on the R-390A audio chassis the keyways in the octal
> sockets for the filter caps are offset at a 45 degree angle from the 12
Oclock
> position. If you plug in the square-base Octal Relay plug the whole thing
will
> be at a cockeyed angle on the audio chassis and the corners of the relay
covers
> will bump into the choke on one side and the bandpass filter on the other
> side of the octal sockets. Unless you rotate the octal sockets on the
chassis I
> don't see how the square relay housings can fit in-between the choke and
> bandpass filter on the chassis? It doesn't look like there is enough room
on the
> chassis to drill new mounting holes to rotate the original octal sockets?
If
> someone else has done this how did they get the square relay covers to fit
square
> on the chassis? I suppose someone could replace the octal sockets with
ones
> that have the snap in ring mountings and rotate them so the relay plugs
will fit
> square. Sounds like a lot of work to get them to fit though. 73 Todd
WD4NGG
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