[Drake] TR-4 Relay Problem

[Paul Blumhardt]

Just what I was going to say!

Mouser usually has them in stock.

Vy Sennytree

K5RT

> -----Original Message-----
> From: drake-bounces at mailman.qth.net
> [mailto:drake-bounces at mailman.qth.net]On Behalf Of Al Parker
> Sent: Tuesday, October 24, 2006 7:36 PM
> To: Chuck Kembring; Drake Reflector
> Subject: Re: [Drake] TR-4 Relay Problem
>
>
> Hi Chuck,
>     Here's what I saved some time ago from Garey Barrell:
> 73,
> Al, W8UT
> New Bern, NC
> BoatAnchors appreciated here
> http://www.boatanchors.org
> http://www.hammarlund.info
>
> =================================
> From: "Garey Barrell" <k4oah at mindspring.com>
> Subject: Re: [drakelist] TR-4C relay
> Date: Wednesday, June 11, 2003 10:16 PM
> Hi Al -
> Potter & Brumfield R10-E1Y4-V2.5K is the standard relay in all the
> T(R)-4 (any) transmitters.
>
> According to Bill Frost, you can replace the earlier 5K ohm coil relay
> with this one with no changes.
> They're available from both Digi-Key and Mouser for about $15.
>
> 01/28/04 Garey adds:
> You might want to add to that message.  Some of the early T-4XC's used a
> 15K
> relay too.  That one needs a 1.5k resistor added in series with the coil.
> 73, Garey - K4OAH
> ===================================
>
>
>
> ----- Original Message -----
> From: "Chuck Kembring" <kembring at epix.net>
> To: "Drake Reflector" <drake at mailman.qth.net>
> Sent: Tuesday, October 24, 2006 8:03 PM
> Subject: [Drake] TR-4 Relay Problem
>
>
> > Hello.....
> > I have taken on a project for a 90 year old (still active) ham and I am
> in
> > need of some help and a part.
> > I was given a TR4 in very dirty condition that does not work. After some
> > cleaning (outside the house!) I see first off that the T/R relay has
> been
> > removed and is missing. After looking at the circuit, I see that it is
> the
> > plate load of the VOX tube and is connected to the +250 VDC bus. I
> imagine
> > this device is 2500 Ohms or better.
> > I'm hoping that someone will have part information on this relay, a
> > possible modern replacement, or perhaps one lying around in the junk box
> > which may be available to me to get this repair moving...
> > Thanks in advance for any / all help,
> > 73,
> > Chuck Kembring WB3LGG
> > Cochranville, Pa
> >
>
>
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