[600MRG] Receiver protection

[Steve Elliston]

Would this work for you?

http://www.ok1rr.com/index.php/technical-topics/39-yet-another-front-end-saver

Dxengineering sell KD9SV produced units...

73
Steve
G3XKR

On Tue, 10 Jul 2018, 15:15 Brian Pease, <bpease2 at myfairpoint.net> wrote:

> An option if high level preamp output is a concern is to cut power to the
> preamp during TX.  This can be done with the Pixel receiving loop preamp,
> for example.
>
> On 7/10/2018 9:42 AM, Gedas wrote:
>
> Many, many years ago when I was a novice my transmitter consisted of a
> HW-16 (with soft final) and my gem receiver SB-313 as the receiver as a
> split set. I was an avid SWL and the SB-313 back in it's day was 2nd to
> none for SWL'ing.
>
> Anyway, on the back of the SB-313 panel was a RCA phono jack called "mute"
> that ran to my HW-16. It fully protected the receiver while I transmitted
> on the same frequency. Perhaps take a look at the simple circuitry of the
> SB-313 and see if you can adopt that to your setup. I suspect the SB-303
> (ham only bands) had the same provision as it was designed to be used with
> separate transmitters like the 401 etc. 73
>
> Gedas, W8BYA
>
> Gallery at http://w8bya.com
> Light travels faster than sound....
> This is why some people appear bright until you hear them speak.
>
> On 7/10/2018 9:31 AM, Joe wrote:
>
> Morning Paul,
>
> Couldn't you use the same technology you used to protect the Pre-amp in
> your EME Array?
> Or I wonder about on of those DX Engeneering RX protectors.
>
> https://www.dxengineering.com/parts/dxe-rg5000hd?seid=dxese1&cm_mmc=pla-google-_-shopping-_-dxese1-_-dx-engineering&gclid=CjwKCAjwspHaBRBFEiwA0eM3ke8G-MGepvgjMyiKmAwEHS5T0s2QeUahNHusc9ezHsrWoiT6AmTGTRoCr-AQAvD_BwE
>
> Joe WB9SBD
>
> The Original Rolling Ball Clock
> Idle Tyme
> Idle-Tyme.com
> http://www.idle-tyme.com
> On 7/10/2018 7:04 AM, N1BUG wrote:
>
> Does anyone have ideas for receiver front end protection at LF and
> MF? I am worried about my TX signal damaging receivers.
>
> Of course the best idea is to disconnect the RX antenna from the
> receiver while transmitting. Any good solution while leaving it
> connected?
>
> Now I have a pair of back to back 1N4148 diodes across the receiver
> front end but I don't think this offers real protection because they
> allow too high voltage before conducting. Also there is a preamp
> after the didoes which can bring the RF to dangerous levels!
> (Somehow nothing was damaged during last winter operating this way... :)
>
> 73,
> Paul N1BUG
>
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