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361. [AMPS] NO NEWS FROM KM1H (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 29 Nov 1999 09:58:09 -0700; ? Carl torpedoed himself. . The End. . . cheers - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative; /archives//html/Amps/1999-11/msg00543.html (10,295 bytes)
362. [AMPS] 3-500Z (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 29 Nov 1999 16:58:47 -0700; This was a common fault in Eimac 3-500Zs that were manufactured in Utah. The problem is that not enough current was used to cause an adequate melt at anode cooler spotwelds. This defect can be spott; /archives//html/Amps/1999-11/msg00551.html (7,387 bytes)
363. [AMPS] Conjugate matching and amplifiers (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 1 Oct 1999 19:59:19 -0700; only ? Who tunes for max efficiency? a produce the (usually). ? it's gotta be a typo. ...... ? Undoubtedly unsliced bologna. You outta know better, Jon. The tube is typically biased linearly for ove; /archives//html/Amps/1999-10/msg00014.html (11,255 bytes)
364. R: [AMPS] Conjugate matching and amplifiers (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 1 Oct 1999 20:18:16 -0700; ? In Class AB1, the highest gain possible means operating with a relatively high value of grid terminating R. Increasing grid terminating R means decreasing VHF stability, even for a neutralized amp; /archives//html/Amps/1999-10/msg00015.html (8,021 bytes)
365. [AMPS] Re: swr (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 00:38:31 -0700; ? To find out if this is really true, why not try it? All that's needed is a 50 +/- j0 ohm termination and a halfwave of 75 ohm coax (c.10.5 ' for 10m). Measure the SWR at the half-wave and the quar; /archives//html/Amps/1999-10/msg00022.html (9,046 bytes)
366. R: R: [AMPS] Conjugate matching and amplifiers (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 00:38:32 -0700; you are welcome, Mauri - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@c; /archives//html/Amps/1999-10/msg00023.html (6,732 bytes)
367. [AMPS] Conjugate matching and amplifiers (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 00:38:36 -0700; ? Sure you can. It takes a ton of calculation and a sheet of graph paper. ? inexpensive sausage ? . The tank fills in the missing half provided that enough Q is provided by the designer. Did I catch; /archives//html/Amps/1999-10/msg00024.html (13,811 bytes)
368. [AMPS] RE6B switching time? (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 00:48:07 -0700; ? Good power handling ability. 25mS is too slow for modern radios.. The noise is severe. A pair of RJ-1As can handle 15A on 28MHz -- and they are quite quiet if you mount them as per my Web site. ch; /archives//html/Amps/1999-10/msg00025.html (7,018 bytes)
369. [AMPS] Re: swr (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 11:53:34 -0700; Thanks, Larry. However, I suspect that no one will try it lest they expose certain amplifier "experts". . . When we were discussing whether a Pi-network is resonant or not, no other person would bui; /archives//html/Amps/1999-10/msg00040.html (8,861 bytes)
370. [AMPS] Re: swr (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 11:53:36 -0700; ? I vote for never knew it, Larry - cheers. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative req; /archives//html/Amps/1999-10/msg00041.html (8,479 bytes)
371. [AMPS] Conjugate Matching (again) (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 22:26:40 -0700; limiting the be conjugately ? amen operating range. ? I design amplifiers for maximum power out and good linearity. For Class AB1, this means relatively high anode / screen potentials and zero grid; /archives//html/Amps/1999-10/msg00048.html (8,138 bytes)
372. [AMPS] The Worldwide, No Holds Barred, SWR Quiz. (score: 1): Author: measures@vcnet.com (measures); Date: Sat, 2 Oct 1999 22:26:42 -0700; Questions 1 and 2: A 50-ohm termination is connected to a generator through a one-half wavelength, 93 ohm characteristic-Z coaxial cable. What is the SWR as measured at the generator with a 50-ohm ch; /archives//html/Amps/1999-10/msg00049.html (8,291 bytes)
373. [AMPS] Feedpoint impedance vs SWR (score: 1): Author: measures@vcnet.com (measures); Date: Sun, 3 Oct 1999 03:04:40 -0700; ? My guess is that a quarter wave 50-ohm line would transform the 100-ohms to [100^2 + 50^2]^0.5 =[10k + 2.5k]^0.5 = 111.8-ohms. However, with a half wavelength of any Z coax, the 100-ohms would not; /archives//html/Amps/1999-10/msg00054.html (7,940 bytes)
374. [AMPS] The Worldwide, No Holds Barred, SWR Quiz. (score: 1): Author: measures@vcnet.com (measures); Date: Sun, 3 Oct 1999 03:04:42 -0700; ? zero-ohms, Marv It's a voltage-source. cheers. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrativ; /archives//html/Amps/1999-10/msg00055.html (9,391 bytes)
375. [AMPS] 813 question (score: 1): Author: measures@vcnet.com (measures); Date: Sun, 3 Oct 1999 22:16:31 -0700; You don't -- unless you want it to work with ok solid-state radios. cheers, James. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions:; /archives//html/Amps/1999-10/msg00064.html (7,079 bytes)
376. [AMPS] Re: Filament Xfmr. (score: 1): Author: measures@vcnet.com (measures); Date: Sun, 3 Oct 1999 22:16:33 -0700; If you nean to HV negative, ok. You can also construct a 5v/60Hz center-tap choke/auto-trans on a high-mu ferrite core. It does double duty by carrying the cathode current to HV neg. - later, Roy. -; /archives//html/Amps/1999-10/msg00065.html (8,470 bytes)
377. [AMPS] Re: Filament Xfmr. (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 4 Oct 1999 01:25:52 -0700; Indeed, Jim, and there is no audible hum. Kenwood's TL-922 does the same. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@con; /archives//html/Amps/1999-10/msg00072.html (8,191 bytes)
378. [AMPS] tube (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 4 Oct 1999 09:12:03 -0700; In SSB g-g service, it is pretty close to a 4-400. The cathode and grid are identical. Tuning up with a pulser is recommended. cheers. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW:; /archives//html/Amps/1999-10/msg00088.html (6,829 bytes)
379. [AMPS] SWR and line length, etc. (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 4 Oct 1999 18:56:31 -0700; ? looks close enough to me, Pete. ? Resonance is another way of saying that the reactance is zero. If the SWR is zero, you have no reactance. later, Bob, W5AH - Rich..., 805.386.3734, www.vcnet.com/; /archives//html/Amps/1999-10/msg00101.html (9,946 bytes)
380. [AMPS] SWR and line length, etc. (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 4 Oct 1999 20:39:03 -0700; understood: ? Indeed. Make that "reflected power". Duhhh. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Admi; /archives//html/Amps/1999-10/msg00105.html (9,008 bytes)

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