[Skimmertalk] Switching antenna quickly between RIG + Skimmer to RIG only (RX to TX)

[Pete Smith N4ZR]

In most instances, the RX antenna in line goes directly to the 
transceiver's RX front end (through a selection switch), while the RX 
ANT Out line comes from the TR switching system and is grounded during 
transmit.  Assuming that's how the K2 does it, that should adequately 
protect your SDR.

73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000 and
arcluster.reversebeacon.net, port 7000


On 6/1/2012 9:46 AM, Andreas Hofmann wrote:
> Thanks for the response.
>
> Yes, my radio is a K2 with the receive antenna options installed.  However, I am not exactly sure how the setup would work.  Assume for a minute I had only a single antenna. I understand that I need a Y on receive. I still have the issue with switching on/before transmit.  How would RX antenna help here?
>
> Thanks
> Andreas
>
> -----Original Message-----
> From: skimmertalk-bounces at contesting.com [mailto:skimmertalk-bounces at contesting.com] On Behalf Of Pete Smith N4ZR
> Sent: Thursday, May 31, 2012 3:35 AM
> To: skimmertalk at contesting.com
> Subject: Re: [Skimmertalk] Switching antenna quickly between RIG + Skimmer to RIG only (RX to TX)
>
> Hi Andy - Does your radio have RX antenna out and in jacks?  That plus a splitter is the absolutely safest approach to using your main antennas for skimming.  You could also use your radio's PTT out (used for controlling your amp) to switch the input of your Ensemble SDR to ground whenever you transmit, though I would be a little worried about timing in that case, for fear of getting RF across the relay before it finished switching.
>
> 73, Pete N4ZR
> The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at telnet.reversebeacon.net, port 7000 and arcluster.reversebeacon.net, port 7000
>
>
> On 5/31/2012 2:34 AM, Andreas Hofmann wrote:
>> Hi,
>>
>>
>>
>> I would like to be able to use the same antenna for skimming and working the DX with my rig.  Currently, I have a manual coax switch in reverse, but I am worrie that I forget to switch.
>>
>>
>>
>> 95% of the day, skimmer is on and listening on the antenna.
>>
>> When I step into the shack I would like to be able to listen on both the HF rig (K2) and skimmer, so skimmer continues.
>>
>> When I want to work something, I am looking for something really easy to disconnec the skimmer temporarily from the antenna.
>>
>>
>>
>> I think I saw a pdf somewhere, but I cannot find it anymore. Anyone suggestions?
>>
>>
>>
>> Thanks
>>
>> Andreas, KU7T
>>
>>
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