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221. Re: [TenTec] Power supply types (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 20 Jan 2014 19:41:38 -0600
This is an apples vs pecans question. Better-stated questions: What's the probability that a properly-designed and engineered linear power supply will radiate RF noise of sufficient amplitude to be b
/archives//html/TenTec/2014-01/msg00206.html (8,614 bytes)

222. Re: [TenTec] In praise of older technology (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Sat, 01 Mar 2014 20:41:02 -0600
I've never been told of this trick for tuning for maximum efficiency of a class C amplifier. Is there someplace I can go to learn a bit more about it? I ask because I have a WRL Globe Champion AM tra
/archives//html/TenTec/2014-03/msg00016.html (16,703 bytes)

223. Re: [TenTec] In praise of older technology (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Sat, 1 Mar 2014 21:42:09 -0600
Ah! I've noticed this but never understood it. At least with the Globe Champ 350, the power output can increase quite a bit off resonance to the right, but the plate current also quickly gets way out
/archives//html/TenTec/2014-03/msg00018.html (11,632 bytes)

224. Re: [TenTec] In praise of older technology (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 5 Mar 2014 09:25:17 -0800 (PST)
I have to mostly agree. As I was growing up, my Dad (W5JHJ, SK 2007) always treated the place we owned a bit like a rental: no holes in walls, no permanent installations of antennas, etc. I never lik
/archives//html/TenTec/2014-03/msg00060.html (12,955 bytes)

225. Re: [TenTec] In praise of older technology (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 5 Mar 2014 10:19:16 -0800 (PST)
Yes, that's the one. As far as I know, I'm the only guy to ever buy one! The mod isn't trivial. You'll need to change the filter capacitor stack and build a FWB rectifier instead of using the origina
/archives//html/TenTec/2014-03/msg00063.html (11,995 bytes)

226. Re: [TenTec] In praise of older technology (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 5 Mar 2014 10:30:33 -0800 (PST)
One other thing: The AL-*)A meter would only read B+ up to 3500 V. You''ll have change the meter shunt resistor. I changed mine such that the meter now read B+/2. Thus, 4 kV yields a meter reading of
/archives//html/TenTec/2014-03/msg00064.html (12,808 bytes)

227. Re: [TenTec] In praise of older technology (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 5 Mar 2014 10:32:00 -0800 (PST)
I meant AL-80A, not an AL-*)A. Sheesh... Kim N5OP One other thing: The AL-*)A meter would only read B+ up to 3500 V. You''ll have change the meter shunt resistor. I changed mine such that the meter n
/archives//html/TenTec/2014-03/msg00065.html (13,246 bytes)

228. Re: [TenTec] In praise of older technology (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 5 Mar 2014 13:17:09 -0800 (PST)
That makes perfect sense, Rick and I agree completely. It's a fair bit of work for, frankly, not a lot of return, even with the 750 W limit. I learned a LOT by doing it, so in that regard, I got my m
/archives//html/TenTec/2014-03/msg00072.html (15,807 bytes)

229. Re: [TenTec] In praise of older technology (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 5 Mar 2014 13:52:12 -0800 (PST)
What we call "hardware cloth" is a galvanized steel mesh with anywhere form 1/8" squares to 1/2" squares. The stuff is simply a coarse galvanized steel screen. I used the kind with 1/4" square openin
/archives//html/TenTec/2014-03/msg00074.html (17,858 bytes)

230. Re: [TenTec] In praise of older technology (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 06 Mar 2014 18:31:30 -0600
I hate to be pedantic and off topic (but that won't stop me)... I don't think any helicopter tip are run supersonic because of huge efficiency losses. Here are numbers for the Bell UH-1 Iroqios (aka
/archives//html/TenTec/2014-03/msg00089.html (21,762 bytes)

231. Re: [TenTec] QSK or not? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 17 Mar 2014 13:14:09 -0500
Why use relays when we have PIN diodes? Kim N5OP "People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith __________________________________________
/archives//html/TenTec/2014-03/msg00155.html (14,278 bytes)

232. Re: [TenTec] QSK or not? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 17 Mar 2014 14:08:58 -0500
I was thinking more along lines for amplifier switching. I have PIN diode switches in both of my amps. There are a few AM BC stations within a few miles of me - one is a 50 kW blowtorch and the other
/archives//html/TenTec/2014-03/msg00159.html (16,872 bytes)

233. Re: [TenTec] QSK or not? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 17 Mar 2014 15:44:33 -0500
I don't think the big multi-multis care about QSK, anyway. The ones I know of run semi. As for Germany alas, no. I'd love to have a go, though! :) PIN diode switches are, in the end, probably not sui
/archives//html/TenTec/2014-03/msg00163.html (20,192 bytes)

234. Re: [TenTec] QSK or not? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 20 Mar 2014 17:41:54 -0500
Just so everyone is clear, *in the US,* the external QSK5 runs about $370 US, while the internal unit, dubbed the QSK5-PC, runs around $270 US. The price difference resides with the power supply buil
/archives//html/TenTec/2014-03/msg00193.html (13,850 bytes)

235. Re: [TenTec] QSK or not? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 20 Mar 2014 17:44:21 -0500
The Measures relay speed-up circuit will certainly make the relays close faster, but how does that affect the settling time? Won;t that still be an issue? Kim N5OP "IF" your amplifier has a very fast
/archives//html/TenTec/2014-03/msg00194.html (11,331 bytes)

236. Re: [TenTec] Any update on a replacement for the Orion II? (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 7 Apr 2014 08:06:23 -0700 (PDT)
I'll preface my query with the caveat that I'm not a software engineer nor do I program for a living. I know C (a little) and programmed in mostly FORTRAN when I did do a lot of programming. I've nev
/archives//html/TenTec/2014-04/msg00101.html (16,774 bytes)

237. Re: [TenTec] USER INTERFACE: Wish List for ORION-III (score: 1)
Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>
Date: Tue, 8 Apr 2014 13:47:19 -0700 (PDT)
I must admit that the LED matrix used on the O2 is very elegant. I know of no other radio that displays the VFO status quite like that. Most of the time, the status is annuciated somewhere in the dis
/archives//html/TenTec/2014-04/msg00163.html (14,279 bytes)

238. [TenTec] RX-366? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 23 Apr 2014 21:50:54 -0500
I'm considering getting RX-366 with a full set of filters. Which are the better roofing filters: the InRad or the TT filters? Also, I couldn't find any mention of the RX366 on the TT site. Did I miss
/archives//html/TenTec/2014-04/msg00414.html (7,321 bytes)

239. Re: [TenTec] RX-366? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Wed, 23 Apr 2014 22:51:55 -0500
I can no longer find mention of it anywhere on their web site. I guess I have missed my chance as it must have been discontinued. Kim N5OP Also, I couldn't find any mention of the RX366 on the TT sit
/archives//html/TenTec/2014-04/msg00417.html (8,320 bytes)

240. Re: [TenTec] RX-366? (score: 1)
Author: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Thu, 24 Apr 2014 10:19:58 -0500
Yes, I saw that. While it's a comforting thing to see, and it seems like it should make for a better filter, does it make any practical difference in filter performance? Kim N5OP "People that make mu
/archives//html/TenTec/2014-04/msg00436.html (10,375 bytes)

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