K3 Aux RF mod for Rx out (No Sub-Rx)
Locked
 
|
I would like to split my K3's Rx feed to also feed my new SDRPlay SDR.
One way is to put a splitter (I'd use a mini-circuits ZFSC-2-1W+ or similar) between the KXV3A's Rx In and Rx out ports and suffer the 3 dB loss (which should be insignificant since my ambient noise is far above the K3's Rx noise floor.Another way - I think - since I do not have a Sub-Rx is to make the Aux-RF BNC an output fed off of the cable that normally feeds (the nonexistent in my case) Sub- Rx. This leaves RX in/Out available for a transverter later on. BTW - I think this will still incur the 3 dB loss - albeit insignificant For those of you who are more familiar with the topology of the K3 - is there a simple way to accomplish #2 without buggering up the rig? Thanks, Russ KD4JO ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: K3 Aux RF mod for Rx out (No Sub-Rx)
|
|
Russ,
Are you trying to use your SDR as a Panadapter, or do you want to share the antenna that the K3 is connected to with that receiver? If you want to use it as a Panadapter, then you need to connect it to the K3 IF output (assuming you have the KXV3A option installed). If you want to share the antenna, then the splitter is a solution - what about protection for your SDR receiver when the K3 is transmitting? 73, Don W3FPR On 8/24/2015 2:18 PM, Russ wrote: > I would like to split my K3's Rx feed to also feed my new SDRPlay SDR. > One way is to put a splitter (I'd use a mini-circuits ZFSC-2-1W+ or similar) between the KXV3A's Rx In and Rx out ports and suffer the 3 dB loss (which should be insignificant since my ambient noise is far above the K3's Rx noise floor.Another way - I think - since I do not have a Sub-Rx is to make the Aux-RF BNC an output fed off of the cable that normally feeds (the nonexistent in my case) Sub- Rx. This leaves RX in/Out available for a transverter later on. BTW - I think this will still incur the 3 dB loss - albeit insignificant > For those of you who are more familiar with the topology of the K3 - is there a simple way to accomplish #2 without buggering up the rig? > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
Re: K3 Aux RF mod for Rx out (No Sub-Rx)
|
I'm using a feed off the KXV3A's Rx in and Rx out ports, as you say, to feed a shortwave receiver. It's very simple with no splitter, just a BNC Tee connector.
The K3 needs to be switched to a band which is higher than the external receiver for it to work as RF is routed through the K3's output filters. Also the K3 needs to enable the Rx ant. The shortwave receiver should be protected from the K3's transmitter with this scheme, at least my receiver has not suffered any damage.
Sverre, LA3ZA
K2 #2198, K3 #3391, LA3ZA Blog: http://la3za.blogspot.com, LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html |
|
|
Thanks Sverre...
Since I have a Mini-Circuits splitter - I'll give it a try to prevent a double termination and 2-1 VSWR Russ KD4JO > Date: Tue, 25 Aug 2015 12:52:41 -0700 > From: [hidden email] > To: [hidden email] > Subject: Re: [Elecraft] K3 Aux RF mod for Rx out (No Sub-Rx) > > I'm using a feed off the KXV3A's Rx in and Rx out ports, as you say, to feed > a shortwave receiver. It's very simple with no splitter, just a BNC Tee > connector. > > The K3 needs to be switched to a band which is higher than the external > receiver for it to work as RF is routed through the K3's output filters. > Also the K3 needs to enable the Rx ant. The shortwave receiver should be > protected from the K3's transmitter with this scheme, at least my receiver > has not suffered any damage. > > > Don Wilhelm-4 wrote > > If you want to share the antenna, then the splitter is a solution - what > > about protection for your SDR receiver when the K3 is transmitting? > > > > On 8/24/2015 2:18 PM, Russ wrote: > >> I would like to split my K3's Rx feed to also feed my new SDRPlay SDR. > >> One way is to put a splitter (I'd use a mini-circuits ZFSC-2-1W+ or > >> similar) between the KXV3A's Rx In and Rx out ports and suffer the 3 dB > >> loss (which should be insignificant since my ambient noise is far above > >> the K3's Rx noise floor. > > > > > > ----- > Sverre, LA3ZA > > K2 #2198, K3 #3391, > LA3ZA Blog: http://la3za.blogspot.com, > LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html > -- > View this message in context: http://elecraft.365791.n2.nabble.com/K3-Aux-RF-mod-for-Rx-out-No-Sub-Rx-tp7606708p7606736.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |