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Total 27 documents matching your query.

1. [RFI] Kenwood TM-D700 (score: 1): Author: "David Jordan" <wa3gin@comcast.net>; Date: Wed, 29 Oct 2008 11:00:42 -0400; Hi folks, This one is a bit odd. My buddy has a Ford F-150 and installed in the truck is his TM-D700 dual band VHD/UHF radio. We chat during our drive into work in the mornings. My radio is also grou; /archives//html/RFI/2008-10/msg00062.html (7,398 bytes)
2. Re: [RFI] Kenwood TM-D700 (score: 1): Author: "Hardy Landskov" <n7rt@cox.net>; Date: Wed, 29 Oct 2008 08:48:34 -0700; Not odd at all. The alternator is varying the 12 VDC and frequency modulating the transmitter. Look at the 12VDC line with a scope and you will see what's happening. I believe a big common mode choke; /archives//html/RFI/2008-10/msg00063.html (8,396 bytes)
3. Re: [RFI] Kenwood TM-D700 (score: 1): Author: "David Jordan" <wa3gin@comcast.net>; Date: Wed, 29 Oct 2008 12:02:41 -0400; Thanks, I have as does my friend the radio 12dc cable going directly to the battery. I also have a Corcom EMI/RFI filter in line with the 12dc to the radio. Seems odd that with both deterrents the in; /archives//html/RFI/2008-10/msg00064.html (9,798 bytes)
4. Re: [RFI] Kenwood TM-D700 (score: 1): Author: dgsvetan@rockwellcollins.com; Date: Wed, 29 Oct 2008 11:27:24 -0500; Dave and Hardy, Yes, the sound being heard is the variable AC frequency of the guy's alternator as he drives at different speeds and with varying electrical loads. The simplest cure, in most cases, i; /archives//html/RFI/2008-10/msg00065.html (13,234 bytes)
5. Re: [RFI] Kenwood TM-D700 (score: 1): Author: Michael Coslo <mjc5@psu.edu>; Date: Wed, 29 Oct 2008 12:35:57 -0400; 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 much that can be done about it either. Mine d; /archives//html/RFI/2008-10/msg00066.html (8,254 bytes)
6. Re: [RFI] Kenwood TM-D700 (score: 1): Author: dgsvetan@rockwellcollins.com; Date: Wed, 29 Oct 2008 11:39:20 -0500; 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 range of the alternator whine. The required series L needs to insert at; /archives//html/RFI/2008-10/msg00067.html (10,682 bytes)
7. Re: [RFI] Kenwood TM-D700 (score: 1): Author: Michael Coslo <mjc5@psu.edu>; Date: Wed, 29 Oct 2008 13:05:51 -0400; 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 other ve; /archives//html/RFI/2008-10/msg00068.html (8,671 bytes)
8. 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)
9. 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)
10. 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)
11. Re: [RFI] Kenwood TM-D700 (score: 1): Author: Michael Coslo <mjc5@psu.edu>; Date: Wed, 29 Oct 2008 14:27:38 -0400; A local Ham friend did a few years ago. IIRC, they said they never heard of it. Not too surprising an answer. -73 de Mike N3LI - _______________________________________________ RFI mailing list RFI@c; /archives//html/RFI/2008-10/msg00073.html (7,898 bytes)
12. 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)
13. Re: [RFI] Kenwood TM-D700 (score: 1): Author: Michael Coslo <mjc5@psu.edu>; Date: Wed, 29 Oct 2008 15:27:50 -0400; Are you saying that they say that it is an RF problem due to your vehicle? What is the mode? I wonder why mine will do this with the engine off, no key in the ignition, and a direct connection to th; /archives//html/RFI/2008-10/msg00075.html (9,177 bytes)
14. 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)
15. Re: [RFI] Kenwood TM-D700 (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 29 Oct 2008 14:52:32 -0700; I'd say so too. It sounds like a problem with inadequate decoupling of the power supply wiring or a pin 1-like problem associated with DC power return. Has nothing to do with it. I agree that going d; /archives//html/RFI/2008-10/msg00084.html (8,652 bytes)
16. Re: [RFI] Kenwood TM-D700 (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 29 Oct 2008 18:54:32 -0400; I have one of the very early TM-D700s and have used it in a Trans Am, an old Eagle Summit, Toyota Prius, and Toyota 4-Runner. I've never had a moments problem with it. However, I have noticed in the; /archives//html/RFI/2008-10/msg00085.html (9,878 bytes)
17. Re: [RFI] Kenwood TM-D700 (score: 1): Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>; Date: Wed, 29 Oct 2008 21:21:20 -0400; It's clear from the original description of the TM-D700 problem that it's *not* alternator whine. However, with respect to alternator whine: I agree with the earlier comment that most of the easily a; /archives//html/RFI/2008-10/msg00086.html (9,145 bytes)
18. Re: [RFI] Kenwood TM-D700 (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Wed, 29 Oct 2008 21:47:31 -0400; There are bulkhead, or feed through caps that will do this job nicely...if you can find them. They are a coaxial capacitor and vary from around a 1/2" to 2" in diameter and are several inches long (o; /archives//html/RFI/2008-10/msg00087.html (10,822 bytes)
19. Re: [RFI] Kenwood TM-D700 (score: 1): Author: jvpoll@dallas.net; Date: Wed, 29 Oct 2008 21:45:51 -0500; I would like to get a count of how many active 'loops' (feedback or closed loops, also phase-locked loops) there may exist in a transceiver of modern design such as the TM-D700. Figure two or three d; /archives//html/RFI/2008-10/msg00088.html (11,466 bytes)
20. Re: [RFI] Kenwood TM-D700 (score: 1): Author: Michael Coslo <mjc5@psu.edu>; Date: Thu, 30 Oct 2008 08:14:51 -0400; Excellent! I'm going to try that for my HF rig. -73 de Mike N3LI - _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2008-10/msg00089.html (8,193 bytes)

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