T/R switch for 2nd Receiver K3S

[VernonJ]

I need a T/R switch for my second receiver which is using its own antenna.
Looked at the MFJ, but I don't think it is what I want. I am currently
looking at this for a keying circuit:
<http://elecraft.365791.n2.nabble.com/file/t396686/TR2_%282%29.png>
I am looking at this for the relay circujit:
<http://elecraft.365791.n2.nabble.com/file/t396686/TR1_%282%29.png>
Does this look viable to protect my 2d receiver from damage. Any suggestions
appreciated.  Vern  K2VJK



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[John Simmons]

Vern,

I did some research a while back, and came up with this:
https://toptendevices.com/products/ab-station-selector/
It has the required isolation.

-de John NI0K

VernonJ wrote on 3/25/2020 10:28 AM:

> I need a T/R switch for my second receiver which is using its own antenna.
> Looked at the MFJ, but I don't think it is what I want. I am currently
> looking at this for a keying circuit:
> <http://elecraft.365791.n2.nabble.com/file/t396686/TR2_%282%29.png>
> I am looking at this for the relay circujit:
> <http://elecraft.365791.n2.nabble.com/file/t396686/TR1_%282%29.png>
> Does this look viable to protect my 2d receiver from damage. Any suggestions
> appreciated.  Vern  K2VJK
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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[Mark Musick]

This is what I use on all my receive antennas to protect the K3S sub-receiver and preamps.

https://www.dxengineering.com/parts/dxe-rg5000hd

ARRAY SOLUTIONS makes a similar device.

No need for slow relays or relay control cables.
I might add that K3LR uses this device to protect his contest station radios.

Mark, WB9CIF

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of John Simmons
Sent: Wednesday, March 25, 2020 15:34
Cc: [hidden email]
Subject: Re: [Elecraft] T/R switch for 2nd Receiver K3S

Vern,

I did some research a while back, and came up with this:
https://toptendevices.com/products/ab-station-selector/
It has the required isolation.

-de John NI0K

VernonJ wrote on 3/25/2020 10:28 AM:

> I need a T/R switch for my second receiver which is using its own antenna.
> Looked at the MFJ, but I don't think it is what I want. I am currently
> looking at this for a keying circuit:
> <http://elecraft.365791.n2.nabble.com/file/t396686/TR2_%282%29.png>
> I am looking at this for the relay circujit:
> <http://elecraft.365791.n2.nabble.com/file/t396686/TR1_%282%29.png>
> Does this look viable to protect my 2d receiver from damage. Any
> suggestions appreciated.  Vern  K2VJK
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]

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