Rx antenna protection

[Phillip Zminda]

Paul,

I have used a BOG, a Pixel Loop and a Wellbrook loop receiving antennas. The BOG was ok but signal levels were very low and it needed a preamp. The BOG needs a lot of tweaking and good grounds at both ends. K1FZ is the expert on BOGs and can provide a wealth of information as well as custom transformers. I used it one winter but didn’t want to leave in the yard when mowing season started. The Pixel loop worked fairly well but I sold it and got a Wellbrook ALA 1530, which I think has a cleaner design. The Wellbrook works quite well at reducing the noise level. The signal levels are lower but with much reduced noise. My loop rotor died and it’s in a fixed position but at about a 6 ft. height it doesn’t seem highly directional. I think the Wellbrook is still cheaper than the Pixel. Andrew Ikin at Wellbrook is very helpful in answering any questions about loop applications

My receive antenna is far enough from the transmit antenna that I have never had any issues with the COR activating, even at 500 watts.

Good luck with your choice.

Phil
N3ZP
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I am aware of the RFI warning however to me there is a huge difference
between detecting RFI and protecting the expensive transceiver from RF
damage.  Apparently the K3S does both.

John KK9A

Bob McGraw K4TAX wrote:
Tue Aug 15 11:59:04 EDT 2017

See page 63 of the manual.  Also page 70 under Receive.    "*HI RFI*
warning:"

RFI DET - *NOR *enables detection of high RFI at the antenna in receive
mode.  (see HI RFI warning. *Troubleshooting*). Set to OFF to disable
the warning.

73
Bob, K4TAX
K3S s/n 10163


On 8/15/2017 9:50 AM, john at kk9a.com wrote:
> Great question! I asked the same thing once and never got an answer so to
> be safe I either short the RX antenna during transmit or if SO2R I use DXE
> receiver guards. It would be nice if the K3S had a similar built in
> protector.
>
> John KK9A

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[Ken Chandler]

DXE ARAV3-1P - DXE RG 5000HD.

I've ordered a DXE ARAVS-1P Receive antenna, and DXE RG 5000HD front end protector from USA,
I'm building a CW skimmer project in a small ...ish back yard with close by transmitting antennas etc, my investment should ! Fit the bill nicely.....I hope.


Ken.. G0ORH

Sent from my iPad

> On 15 Aug 2017, at 22:21, Phillip Zminda <[hidden email]> wrote:
>
> Paul,
>
> I have used a BOG, a Pixel Loop and a Wellbrook loop receiving antennas. The BOG was ok but signal levels were very low and it needed a preamp. The BOG needs a lot of tweaking and good grounds at both ends. K1FZ is the expert on BOGs and can provide a wealth of information as well as custom transformers. I used it one winter but didn’t want to leave in the yard when mowing season started. The Pixel loop worked fairly well but I sold it and got a Wellbrook ALA 1530, which I think has a cleaner design. The Wellbrook works quite well at reducing the noise level. The signal levels are lower but with much reduced noise. My loop rotor died and it’s in a fixed position but at about a 6 ft. height it doesn’t seem highly directional. I think the Wellbrook is still cheaper than the Pixel. Andrew Ikin at Wellbrook is very helpful in answering any questions about loop applications
>
> My receive antenna is far enough from the transmit antenna that I have never had any issues with the COR activating, even at 500 watts.
>
> Good luck with your choice.
>
> Phil
> N3ZP
> ______________________________________________________________
> Elecraft mailing list
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>
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