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21. Re: [Amps] Antenna traps (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 14 Dec 2005 13:54:12 -0600
I have one that I bought from Bill about a year before he died that has never been up in the air because he delivered it to late for the project I was working on. It's a 2-wire dipole designed for 80
/archives//html/Amps/2005-12/msg00167.html (7,867 bytes)

22. Re: [Amps] NEC-think. (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 06 Jan 2006 12:29:36 -0600
NO, NO, NO, NO! A neutral is NEVER permitted to be an equipment grounding conductor. The neutral is required to be bonded at ONE, AND ONLY ONE, POINT to the equipment ground (the service entrance in
/archives//html/Amps/2006-01/msg00222.html (9,446 bytes)

23. Re: [Amps] new mobile amps from THP (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 11 Jan 2006 08:50:42 -0600
controlled protection system. applications as well. For at least a year, it's been an open secret that Elecraft is well along with work on two models of high power amplifiers. It's rumored that one w
/archives//html/Amps/2006-01/msg00337.html (8,187 bytes)

24. Re: [Amps] new mobile amps from THP (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 11 Jan 2006 09:06:38 -0600
YES! I just put a 100w HF transceiver in my 2006 Toyota Sequoia and drive to CA with it. Power straight from the battery, antenna a Hamstick on the luggage rack, shield of coax bonded to a big bolt h
/archives//html/Amps/2006-01/msg00338.html (9,620 bytes)

25. Re: [Amps] DXpedition Amp Recommendation (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 18 Jan 2006 23:21:43 -0600
Ten Tec Herc II? Runs on 12v, easy to drive (20w will get you full power, 25w on 160), give it a matched load and it's happy. Jim Brown K9YC _______________________________________________ Amps maili
/archives//html/Amps/2006-01/msg00463.html (8,267 bytes)

26. [Amps] Ten Tec Herc 444 (original Herc) (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 19 Jan 2006 16:07:01 -0600
I've got one too. When I bought it (used), it was wired for 120V. I rewired it for 240v, and it didn't work -- blew fuses, as I recall. What I found was that one of the Molexes was wired wrong -- pro
/archives//html/Amps/2006-01/msg00468.html (7,815 bytes)

27. Re: [Amps] Ten Tec HERC II model 420 ---- TSPA (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 20 Jan 2006 16:03:27 -0600
According to the manual, the 420 (Herc II) is rated 550 watts output CW, RTTY, and SSB, 1 kW input; SSB is rated for continuous operation, CW/RTTY is rated for a 50% duty cycle with maximum continuou
/archives//html/Amps/2006-01/msg00494.html (8,336 bytes)

28. Re: [Amps] Name of Designer of TenTec Titan 425? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 05 Feb 2006 13:08:53 -0600
I have gotten reasonably good support on Titan 425 from the guy in Ten-Tec's service department who specializes in working on them. His name is John, and he's not a ham -- his background is in broad
/archives//html/Amps/2006-02/msg00111.html (7,975 bytes)

29. Re: [Amps] RFI - Small Home Network? (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 05 Feb 2006 17:38:34 -0600
Only on paper. 10BaseT ethernet puts out loud birdies on a number of ham bands. I'm a CW guy, so I'll tell you about the ones that I've identified. There are two on 30 meters, one around 14,030 kHz,
/archives//html/Amps/2006-02/msg00118.html (9,001 bytes)

30. Re: [Amps] FW: RFI Question (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 07 Feb 2006 07:30:12 -0600
WRONG! Clip-on ferrites ARE effective for the frequencies for which they are designed -- VHF. They are NOT intended for HF, and they don't work at HF. See the tutorial on my website. http://audiosyst
/archives//html/Amps/2006-02/msg00154.html (8,361 bytes)

31. Re: [Amps] FW: RFI Question (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 07 Feb 2006 09:40:10 -0600
Yes. As noted in my tutorial, ANY coil of wire will see its R and L multiplied by the square of the number of turns, and stray capacitance between the turns. A ferrite surrounding the wire adds its o
/archives//html/Amps/2006-02/msg00156.html (8,250 bytes)

32. Re: [Amps] Fw: FW: RFI Question (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 07 Feb 2006 17:03:27 -0600
I've seen no reason to believe that is the case. They just aren't in the catalog yet, for the reasons noted below. few resellers who advertise in the ham marketplace. All you have to do order from a
/archives//html/Amps/2006-02/msg00167.html (8,695 bytes)

33. Re: [Amps] Sencore (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Tue, 07 Feb 2006 17:11:29 -0600
I agree. Sencore is VERY sales driven, very high pressure, very high priced. They bought the exclusive rights to a very nice piece of pro audio test equipment (the Audio Toolbox), and no one in the p
/archives//html/Amps/2006-02/msg00168.html (6,765 bytes)

34. Re: [Amps] Tokyo HP (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 18 Feb 2006 08:55:36 -0600
Yes. I own three Ten Tec power amps -- a Titan 425, Herc I, and Herc II. All will hit rated power with not much more than 25 watts drive. Jim K9YC _______________________________________________ Amps
/archives//html/Amps/2006-02/msg00336.html (8,025 bytes)

35. Re: [Amps] Queation on toroid core materials (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sun, 19 Feb 2006 11:31:10 -0600
I'm a bit late to the table on this issue, because I've been on the road almost continuously for three weeks. But I have some comments that might shed some light. First, I agree with John's comments
/archives//html/Amps/2006-02/msg00349.html (12,216 bytes)

36. Re: [Amps] 87A vs. IC-PW1 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 22 Feb 2006 12:08:14 -0600
I don't know either of these amps, but I would also look at QSK and how easy they are to control operationally. To me, QSK is an absolute MUST for CW operation. Without it, you're a lid, because you
/archives//html/Amps/2006-02/msg00381.html (7,605 bytes)

37. Re: [Amps] 87A vs. IC-PW1 (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 22 Feb 2006 14:33:49 -0600
I am celebrating my 50th year in ham radio, have held an Extra ticket since 1959. I first learned to use QSK in 1956 when I worked lots of traffic nets. And I've been a contester since the late 50's.
/archives//html/Amps/2006-02/msg00396.html (9,530 bytes)

38. Re: [Amps] QSK (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 22 Feb 2006 18:57:15 -0600
So did I. I didn't say that. I qualified my assertion to CW operation only. Not SSB, not RTTY, not PSK. Those are different modes that REQUIRE that we transmit blind (or deaf). But not CW -- we CAN c
/archives//html/Amps/2006-02/msg00411.html (7,564 bytes)

39. Re: [Amps] QSK or not (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Wed, 22 Feb 2006 20:45:04 -0600
Until the advent of rice box transceivers designed primarily for SSB with CW as an afterthought, QSK was pretty much the rule on the CW bands. In fact, one of the major reasons for the high level of
/archives//html/Amps/2006-02/msg00417.html (8,380 bytes)

40. Re: [Amps] QSK (okay, not QSK...) (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 24 Feb 2006 07:35:02 -0600
Huh? I do it all the time! I use Writelog, and the <ESC> key interrupts my transmission quite nicely without causing any problems with generation of serial numbers, memory, or logging. I would be qui
/archives//html/Amps/2006-02/msg00490.html (9,036 bytes)

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