[600MRG] Receiver protection

[Gedas]

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
> Sig
> 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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>
>
>
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