K2 Disable Transmit
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I have an extra K2/10 with pretty much all options except DSP. I also have a 9 year old grandson who at least has the potential to be interested in ham radio. It occurred to me that I could set up the K2 in his room at home (he lives a couple of miles away) and let him do some SWL.
I would need to disable transmit in the K2 so "transmit accidents" can not happen. Permanently putting the K2 in test mode would be perfect since he could practice CW sending but it is not obvious how I could do that. The KAT2 would not work without transmit so I was thinking of a low price manual ATU with a random wire antenna. I did a search of the archives and found some previous references but no definitive answer. Any thoughts? Thanks, Lou W2ROW |
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Lou,
I would suggest the best way to disable transmit for your situation is to disable the 8T signal - I would suggest removing Q1 from the Control Board. For added protection to the K2 transmit stages, I would also suggest removing the DC voltage from RF Board Q7 and Q8 by removing T3 and remove RFC4 to take the voltage off Q5 and Q6. 73, Don W3FPR On 12/29/2011 9:54 AM, Lou Voerman W2ROW wrote: > I have an extra K2/10 with pretty much all options except DSP. I also have a > 9 year old grandson who at least has the potential to be interested in ham > radio. It occurred to me that I could set up the K2 in his room at home (he > lives a couple of miles away) and let him do some SWL. > > I would need to disable transmit in the K2 so "transmit accidents" can not > happen. Permanently putting the K2 in test mode would be perfect since he > could practice CW sending but it is not obvious how I could do that. > > The KAT2 would not work without transmit so I was thinking of a low price > manual ATU with a random wire antenna. > > I did a search of the archives and found some previous references but no > definitive answer. Any thoughts? > > Thanks, > Lou W2ROW > > > -- > View this message in context: http://elecraft.365791.n2.nabble.com/K2-Disable-Transmit-tp7135802p7135802.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 > 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 |
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In reply to this post by Lou Voerman W2ROW
You could unsolder T3, that would remove power from the finals making transmission impossible.
73 de Al, W2GZN From: Lou Voerman W2ROW <[hidden email]> To: [hidden email] Sent: Thursday, December 29, 2011 9:54 AM Subject: [Elecraft] K2 Disable Transmit I have an extra K2/10 with pretty much all options except DSP. I also have a 9 year old grandson who at least has the potential to be interested in ham radio. It occurred to me that I could set up the K2 in his room at home (he lives a couple of miles away) and let him do some SWL. I would need to disable transmit in the K2 so "transmit accidents" can not happen. Permanently putting the K2 in test mode would be perfect since he could practice CW sending but it is not obvious how I could do that. The KAT2 would not work without transmit so I was thinking of a low price manual ATU with a random wire antenna. I did a search of the archives and found some previous references but no definitive answer. Any thoughts? Thanks, Lou W2ROW -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Disable-Transmit-tp7135802p7135802.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 ______________________________________________________________ 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 |
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In reply to this post by Don Wilhelm-4
Don and others - thanks for the responses. I guess I will be warming up the soldering iron. 73, Lou |
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