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21. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 29 Oct 2008 13:10:37 -0400
yup My D-700 will make this noise with the vehicle turned of, and I'm running directly to the battery. Actually, if you all could hear the sound, it would be apparent that it isn't alternator or othe
/archives//html/RFI/2008-10/msg00069.html (9,389 bytes)

22. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 29 Oct 2008 13:13:56 -0400
So, How much #10 and at what diameter. I have the diode. Thanks, dave Dave, The CorCom is not doing you any good. It has no effect in the range of a few hundred Hz to 2500 Hz, which is roughly the ra
/archives//html/RFI/2008-10/msg00070.html (11,676 bytes)

23. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 29 Oct 2008 13:14:54 -0400
Hmmm, Has anyone called Kenwood about it? No point looking much further for the problem. The TM-D700 has this issue. Typically it is when the radio is cold, and heating up. I don't think there is muc
/archives//html/RFI/2008-10/msg00071.html (9,657 bytes)

24. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 29 Oct 2008 15:13:18 -0400
Folks, I just spoke with Kenwood customer service. They understand the problem and don't believe they are responsible to resolve the issue. In particular the Ford truck's 12vdc circuits are RF and Au
/archives//html/RFI/2008-10/msg00074.html (12,452 bytes)

25. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 29 Oct 2008 16:31:47 -0400
It is interesting to me that before the D700 I used a FT-857 and never had the problem. In fact the D700 even picks up spark plug noise where the 857 does not. Makes me think Kenwood should own the p
/archives//html/RFI/2008-10/msg00079.html (10,241 bytes)

26. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Thu, 30 Oct 2008 13:31:01 -0400
How big is big? 20,000mfd? from Yes, but that winding will drop some voltage on transmit. I'd try ONLY a BIG capacitor first, then add the inductance only if the cap didn't solve the problem. 73, Jim
/archives//html/RFI/2008-10/msg00091.html (8,827 bytes)

27. Re: [RFI] Kenwood TM-D700 (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Sat, 1 Nov 2008 08:42:25 -0400
Does anyone have a variable 12dc supply that they could use with the D700 and perform some testing with voltages from 13.8 down to 11.8. I know the FT-857 I have doesn't like any voltage below 12vdc.
/archives//html/RFI/2008-11/msg00000.html (11,100 bytes)

28. Re: [RFI] rfi-DM-700 (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Thu, 13 Nov 2008 09:10:25 -0500
...no GPS in either unit we're testing. The siren sound was emitted from one of the trucks when the engine was off and the radio was just on battery. We have not performed the low voltage test yet. W
/archives//html/RFI/2008-11/msg00023.html (8,085 bytes)

29. Re: [RFI] Low RFI HDTV (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Sun, 28 Dec 2008 22:27:19 -0500
Sarnoff has come up with a replacement for HDTV SHDTV...hold-on to your $$$ 1080I/P are already obsolete. I've got two SONY Bravia LCDs...good enough for my old eyes and no RFI that I can detect. Enj
/archives//html/RFI/2008-12/msg00086.html (8,211 bytes)

30. Re: [RFI] Hum in Bose QC2 headphones (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Tue, 13 Jan 2009 23:12:50 -0500
Perhaps the radio is a mono output and the headphones are stereo...when used with a mono jack you may be shorting one side to a ground loop... try getting a mono to stereo converter jack. 73, dave wa
/archives//html/RFI/2009-01/msg00094.html (9,116 bytes)

31. Re: [RFI] Hum in Bose QC2 headphones (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Wed, 14 Jan 2009 00:34:25 -0500
Yes, A couple of decades ago I had the same set up almost with an FT1000. The FT power supply didn't like the the fact that I using a DSP599 with a difference power supply...different issue but simil
/archives//html/RFI/2009-01/msg00100.html (12,785 bytes)

32. Re: [RFI] Hum in Bose QC2 headphones (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 14 Jan 2009 12:31:55 -0500
I love mine...we operate field day from a bus with a 20kw generator and several overhead AC units...can't hear any of it with the head phones turned on...comfortable too. Enjoy, Dave Wa3gin p.s. pics
/archives//html/RFI/2009-01/msg00107.html (11,295 bytes)

33. Re: [RFI] Hum in Bose QC2 headphones (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 14 Jan 2009 13:59:28 -0500
If the headsphones have a ground problem the issue might be reproducible on another piece of equipment (PC, stereo, walkman, etc.). 73, Dave Wa3gin Gary, At this point you need to check that the grou
/archives//html/RFI/2009-01/msg00110.html (12,082 bytes)

34. Re: [RFI] Hum in Bose QC2 headphones (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Wed, 14 Jan 2009 16:56:41 -0500
What fun...take a close look at the jack. Some are steel with chrome coating...the two metals start to react and a resistance between the chrome and the steel develops increasing the impedance...not
/archives//html/RFI/2009-01/msg00112.html (12,090 bytes)

35. Re: [RFI] Hum in Bose QC2 headphones (score: 1)
Author: "David Jordan" <wa3gin@comcast.net>
Date: Thu, 15 Jan 2009 12:35:21 -0500
Check to see if the input impedance between the two channels is different. You may just have an 'open' signal ground on the effected channel. That could be a cold solder joint on the active circuit b
/archives//html/RFI/2009-01/msg00119.html (19,174 bytes)

36. Re: [RFI] 80/160M RFI in neighbor's oven circuitry (PART 2) (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Sun, 8 Feb 2009 15:16:23 -0500
The GE Profile microwave here is 240volt @ 30amps per leg. No GFI at that load current. Depending on the code and age of the house it may not have any external ground rods installed. For example, her
/archives//html/RFI/2009-02/msg00073.html (10,297 bytes)

37. Re: [RFI] 80/160M RFI in neighbor's oven circuitry (PART 2) (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Mon, 9 Feb 2009 08:02:04 -0500
Tried it your way...didn't work worth a damn... Best, dave wa3gin _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2009-02/msg00075.html (7,723 bytes)

38. Re: [RFI] Alarm Systems and EMI/EMC (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Sat, 9 May 2009 17:51:27 -0400
Go to http://www.apexcctv.com/ch and call their techsupport number...they have great folks that have answers or offer to find them for you... Good Luck, dave wa3gin __________________________________
/archives//html/RFI/2009-05/msg00009.html (8,051 bytes)

39. Re: [RFI] Alarm Systems and EMI/EMC (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Sun, 10 May 2009 00:00:55 -0400
UHF links for repeater satellite receivers...434.000 - ???? _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
/archives//html/RFI/2009-05/msg00012.html (12,638 bytes)

40. Re: [RFI] Alarm Systems and EMI/EMC (score: 1)
Author: "WA3GIN" <wa3gin@comcast.net>
Date: Sun, 10 May 2009 08:09:49 -0400
Interesting, I wonder how close one of these units would have to be...I know some U-links here in VA are some 25 miles from the repeater...running 10-20 watts to a 6 ele yagi at 500ft ASL...seems tha
/archives//html/RFI/2009-05/msg00017.html (15,011 bytes)

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