I see that John Kriner still has some.
http://www.ebay.com/itm/Drake-TR-4-replacement-relay-pcb-instructions-/390339524281
________________________________
Garey
Could you guide me to the layout for the relay pc board you mentioned.
thanks
dale wt4t
-----Original Message-----
From: Robert Ladden <[email protected]>
To: drakelist <[email protected]>
Sent: Mon, Dec 26, 2011 11:47 am
Subject: Re: [Drakelist] T-4X relay
I installed the Drake board in the TR-3. I think you can make your own easily
using a breadboard and a relay socket.
73,
Bob WW3QB
________________________________
Dale -
The original relay runs from the +250 VDC bus through the 6EV7 to ground. The
relay is a P&B R10-Y4-E3-2.5k and is available from Mouser and Digikey and ...
This is the same relay that is used in the later T-4X(any) and TR-4XC
transmitters.
Drake used to offer a small PC board with a relay socket and some pins to
spread out the connections. The Drake board is no longer available, but I do
have an artwork for it. A list member built up a small adapter out of aluminum
(could be PC board material) that worked out well. He wired directly to the
relay socket contacts, which are very tight, and don't forget that lovely Drake
wire insulation that melts at approximately 80 degrees!!. Apparently his hands
are much steadier than mine! :-) He is planning to document 'soon'.
--
73, Garey - K4OAH
St Charles, IL
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service
Supplement CDs
<www.k4oah.com>
[email protected] wrote:
> Just bought the T-4x and have not looked at it yet. The seller mentioned
> that he pulled the open relay and replaced it with a enclosed relay he had
> and also said the PTT circuit was now 12 vdc. Looking at the schematic, looks
> like the original was 6 volt on the PTT. I will likely change things back to
> where they were,is the original relay aviable from a vendor? anyone have a
> #? is there a covered reley that would work or ever a small pc board that
> would allow a plug in?
> thanks
> dale wt4t
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