KX1 30m module - Hand capacitance effect?
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KX1 30m module - Hand capacitance effect?
 
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Hi.
I noticed last night that if I am listening to 30m and I place my hand on the case of the KX1 (anywhere on the case but especially over the 30m module), that the signals get a bit quieter. I'm wondering if it's a capacitive effect since the 30m module components are separated from the case by only a thin rubber foot... I have 26ft wire connected as an antenna and about 15ft as a counterpoise. I wondered if the 30m module wasn't grounded properly but I don't suppose it would work at all if the ground wire was broken (mind you if I remember correctly there are two ground hookups - maybe one has given out). Can someone else with a KX1 confirm this behaviour? It doesn't happen on 20m/40m. Thanks, Martin. VA3SIE. ___________________________________________________________ Yahoo! Messenger - NEW crystal clear PC to PC calling worldwide with voicemail http://uk.messenger.yahoo.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
RE: KX1 30m module - Hand capacitance effect?
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Martin, VA3SIE asked:
I noticed last night that if I am listening to 30m and I place my hand on the case of the KX1 (anywhere on the case but especially over the 30m module), that the signals get a bit quieter. I'm wondering if it's a capacitive effect since the 30m module components are separated from the case by only a thin rubber foot... I have 26ft wire connected as an antenna and about 15ft as a counterpoise. I wondered if the 30m module wasn't grounded properly but I don't suppose it would work at all if the ground wire was broken (mind you if I remember correctly there are two ground hookups - maybe one has given out). Can someone else with a KX1 confirm this behaviour? It doesn't happen on 20m/40m. --------------------------------- I'd suspect you are detuning your antenna by touching the case. A 15 foot 'counterpoise' isn't an especially effective ground, so adding your body capacity often has a significant effect. If you were running high power, you might complain that the rig 'bites' with RF when you touch it while transmitting. Those effects are very frequency-dependent, which is why you only notice it on one band. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Did you cover up the speaker?? Sorry don't know why I asked
that............. Have a great and safe Memorial Day weekend to one and all!! 73 Chuck AA8VS ----- Original Message ----- From: "Ron D'Eau Claire" <[hidden email]> To: <[hidden email]> Sent: Thursday, May 26, 2005 3:14 PM Subject: RE: [Elecraft] KX1 30m module - Hand capacitance effect? Martin, VA3SIE asked: I noticed last night that if I am listening to 30m and I place my hand on the case of the KX1 (anywhere on the case but especially over the 30m module), that the signals get a bit quieter. I'm wondering if it's a capacitive effect since the 30m module components are separated from the case by only a thin rubber foot... I have 26ft wire connected as an antenna and about 15ft as a counterpoise. I wondered if the 30m module wasn't grounded properly but I don't suppose it would work at all if the ground wire was broken (mind you if I remember correctly there are two ground hookups - maybe one has given out). Can someone else with a KX1 confirm this behaviour? It doesn't happen on 20m/40m. --------------------------------- I'd suspect you are detuning your antenna by touching the case. A 15 foot 'counterpoise' isn't an especially effective ground, so adding your body capacity often has a significant effect. If you were running high power, you might complain that the rig 'bites' with RF when you touch it while transmitting. Those effects are very frequency-dependent, which is why you only notice it on one band. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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