Joe,
I don't recommend that approach for FD. The problem is, it will protect the
front end, BUT, if signals are so strong that it kicks in, you are putting a
diode in line with that big RX signal. It thus is creating harmonics, which
are reradiated, making the FD situation worse.
If your signals are so large as to overload a nearby receiver, a better radio
or filters, or better antenna isolation (like physical separation) are your
only options. Some gains can be made with placement, vertical vs horizontal,
etc. If you are serious about multitransmitter FD, get band filters. And
transceivers with low phase noise.
73,
Drew K3PA
________________________________
Message: 3
Date: Tue, 11 Jun 2019 12:00:57 -0500
From: Joe <nss@mwt.net>
To: cq-contest@contesting.com
Subject: [CQ-Contest] Reciever Protectorr
Message-ID: <3c3849e9-843a-7d12-6fce-c1c913bbc2f2@mwt.net>
Content-Type: text/plain; charset=windows-1252; format=flowed
A unit like this.
https://www.dxengineering.com/search/product-line/dx-engineering-receiver-guard-electronic-rf-limiters?autoview=SKU&keyword=receive%20protector&sortby=BestKeywordMatch&sortorder=Ascending
Has anyone made it so it can work with a tranciever? Think like weak sig
VHF/UHF folk do with remote preamps?
Joe WB9SBD
------------------------------
Message: 6
Date: Tue, 11 Jun 2019 14:34:43 -0500
From: Joe <nss@mwt.net>
To: Edward Sawyer <EdwardS@sbelectronics.com>,
"cq-contest@contesting.com" <cq-contest@contesting.com>
Subject: Re: [CQ-Contest] Reciever Protectorr
Message-ID: <465bb85d-22f3-f1dd-ab50-2b312ba90088@mwt.net>
Content-Type: text/plain; charset=windows-1252; format=flowed
I'm thinking for Field Day.
We have the Passband filters for out of band strong stuff.? But they
don't help protect front ends from in band sigs like Phone station CW
station Digital station all on the same band.
Thinking this might help.
Joe WB9SBD
On 6/11/2019 2:13 PM, Edward Sawyer wrote:
> Joe, I use one going into the RCV antenna port of my FT1000MPs. I often use
> beverages with dual radio same band (160 - 40) and this type of product
> insures no blown receiver front end.
>
> 73
>
> Ed N1UR
>
> -----Original Message-----
> From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of Joe
> Sent: Tuesday, June 11, 2019 1:01 PM
> To: cq-contest@contesting.com
> Subject: [CQ-Contest] Reciever Protectorr
>
> A unit like this.
>
> https://www.dxengineering.com/search/product-line/dx-engineering-receiver-guard-electronic-rf-limiters?autoview=SKU&keyword=receive%20protector&sortby=BestKeywordMatch&sortorder=Ascending
>
> Has anyone made it so it can work with a tranciever? Think like weak sig
> VHF/UHF folk do with remote preamps?
>
> Joe WB9SBD
>
>
> _______________________________________________
> CQ-Contest mailing list
> CQ-Contest@contesting.com
> http://lists.contesting.com/mailman/listinfo/cq-contest
>
>
------------------------------
Message: 7
Date: Tue, 11 Jun 2019 15:13:53 -0400
From: Edward Sawyer <EdwardS@sbelectronics.com>
To: Joe <nss@mwt.net>, "cq-contest@contesting.com"
<cq-contest@contesting.com>
Subject: Re: [CQ-Contest] Reciever Protectorr
Message-ID:
<0D39B6681B67B44DAEC5D6AD99294A8E04CD7937DDE5@SBEMAIL.sbelectronics.com>
Content-Type: text/plain; charset="us-ascii"
Joe, I use one going into the RCV antenna port of my FT1000MPs. I often use
beverages with dual radio same band (160 - 40) and this type of product insures
no blown receiver front end.
73
Ed N1UR
-----Original Message-----
From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of Joe
Sent: Tuesday, June 11, 2019 1:01 PM
To: cq-contest@contesting.com
Subject: [CQ-Contest] Reciever Protectorr
A unit like this.
https://www.dxengineering.com/search/product-line/dx-engineering-receiver-guard-electronic-rf-limiters?autoview=SKU&keyword=receive%20protector&sortby=BestKeywordMatch&sortorder=Ascending
Has anyone made it so it can work with a tranciever? Think like weak sig
VHF/UHF folk do with remote preamps?
Joe WB9SBD
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
------------------------------
Message: 8
Date: Tue, 11 Jun 2019 14:25:20 -0500
From: "Keith Dutson" <kdutson@sbcglobal.net>
To: "Cq-Contest" <cq-contest@contesting.com>
Subject: [CQ-Contest] Multi-2 Station Re-build
Message-ID: <000001d5208b$69912300$3cb36900$@sbcglobal.net>
Content-Type: text/plain; charset="us-ascii"
I lost my two stations to a direct lightning strike. No coax was connected,
but rigs, amps and computers were all connected to power and internet.
I purchased an Icom 7610 last weekend at HamCom. Now must choose a digital
interface. I have used Navigator, but am looking for alternatives. Also
looking for recommendations. Thanks.
73, Keith NM5G
------------------------------
Message: 9
Date: Tue, 11 Jun 2019 15:45:05 -0400
From: "Tim Duffy" <k3lr@k3lr.com>
To: "'Joe'" <nss@mwt.net>, "'Edward Sawyer'"
<EdwardS@sbelectronics.com>, <cq-contest@contesting.com>
Subject: Re: [CQ-Contest] Reciever Protectorr
Message-ID: <027f01d5208e$2dd227d0$89767770$@k3lr.com>
Content-Type: text/plain; charset="iso-8859-1"
Hello Joe
If your radio does not have the ability to break out the RX antenna - you
can use the DXE RTR-2.
With the RG5000 plug in module, it will protect your receiver front end.
https://www.dxengineering.com/parts/dxe-rtr-2
73
Tim K3LR
-----Original Message-----
From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of Joe
Sent: Tuesday, June 11, 2019 3:35 PM
To: Edward Sawyer; cq-contest@contesting.com
Subject: Re: [CQ-Contest] Reciever Protectorr
I'm thinking for Field Day.
We have the Passband filters for out of band strong stuff.? But they
don't help protect front ends from in band sigs like Phone station CW
station Digital station all on the same band.
Thinking this might help.
Joe WB9SBD
On 6/11/2019 2:13 PM, Edward Sawyer wrote:
> Joe, I use one going into the RCV antenna port of my FT1000MPs. I often
use beverages with dual radio same band (160 - 40) and this type of product
insures no blown receiver front end.
>
> 73
>
> Ed N1UR
>
> -----Original Message-----
> From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of
Joe
> Sent: Tuesday, June 11, 2019 1:01 PM
> To: cq-contest@contesting.com
> Subject: [CQ-Contest] Reciever Protectorr
>
> A unit like this.
>
>
https://www.dxengineering.com/search/product-line/dx-engineering-receiver-gu
ard-electronic-rf-limiters?autoview=SKU&keyword=receive%20protector&sortby=B
estKeywordMatch&sortorder=Ascending
>
> Has anyone made it so it can work with a tranciever? Think like weak sig
VHF/UHF folk do with remote preamps?
>
> Joe WB9SBD
>
>
> _______________________________________________
> CQ-Contest mailing list
> CQ-Contest@contesting.com
> http://lists.contesting.com/mailman/listinfo/cq-contest
>
>
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
------------------------------
Message: 10
Date: Tue, 11 Jun 2019 15:42:10 -0400
From: Edward Sawyer <EdwardS@sbelectronics.com>
To: Joe <nss@mwt.net>, "cq-contest@contesting.com"
<cq-contest@contesting.com>
Subject: Re: [CQ-Contest] Reciever Protectorr
Message-ID:
<0D39B6681B67B44DAEC5D6AD99294A8E04CD7937DDF3@SBEMAIL.sbelectronics.com>
Content-Type: text/plain; charset="us-ascii"
Joe, The Passband filters are really for close in overload rejection of radios
on different bands. They don't protect in the technical sense.
If the spacing of the stations is at least 150 ft and you are using 100W
radios, tip to tip on yagis pointed in the same direction (typical of field
day) my experience is that you don't need this protection and it won't help cut
down in band interference.
If you do use them, you either have to run receive only antennas and feed it
into the rcv port or you need a solid state T/R relay and feed the R into the
rcv port through the protection circuit. Honestly, I have only seen that done
with KW stations, not 100W stations.
I did over a decade of SO2R and in band 2 radio with good separation and never
needed them. Bandfilters for sure.
73
Ed N1UR
From: Joe [mailto:nss@mwt.net]
Sent: Tuesday, June 11, 2019 3:35 PM
To: Edward Sawyer; cq-contest@contesting.com
Subject: Re: [CQ-Contest] Reciever Protectorr
I'm thinking for Field Day.
We have the Passband filters for out of band strong stuff. But they don't help
protect front ends from in band sigs like Phone station CW station Digital
station all on the same band.
Thinking this might help.
Joe WB9SBD
On 6/11/2019 2:13 PM, Edward Sawyer wrote:
Joe, I use one going into the RCV antenna port of my FT1000MPs. I often use
beverages with dual radio same band (160 - 40) and this type of product insures
no blown receiver front end.
73
Ed N1UR
-----Original Message-----
From: CQ-Contest [mailto:cq-contest-bounces@contesting.com] On Behalf Of Joe
Sent: Tuesday, June 11, 2019 1:01 PM
To: cq-contest@contesting.com<mailto:cq-contest@contesting.com>
Subject: [CQ-Contest] Reciever Protectorr
A unit like this.
https://www.dxengineering.com/search/product-line/dx-engineering-receiver-guard-electronic-rf-limiters?autoview=SKU&keyword=receive%20protector&sortby=BestKeywordMatch&sortorder=Ascending
Has anyone made it so it can work with a tranciever? Think like weak sig
VHF/UHF folk do with remote preamps?
Joe WB9SBD
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com<mailto:CQ-Contest@contesting.com>
http://lists.contesting.com/mailman/listinfo/cq-contest
------------------------------
Subject: Digest Footer
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------------------------------
End of CQ-Contest Digest, Vol 198, Issue 14
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