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41. [AMPS] Bias for SB-220 (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Fri, 4 Jun 1999 10:24:33 -0400; ? You run VOX every time you talk on the telephone, Jon. As I recall, we conversed on the telephone. Huh? Telephone connections are full-duplex -- the channel is open all the time in both directions.; /archives//html/Amps/1999-06/msg00124.html (9,125 bytes)
42. [AMPS] TL-922 Filament Transformer Protection (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 7 Jun 1999 23:10:20 -0400; when I tell the story of how I thermally burned them up in my amp on 10M. Just to throw in an empirical observation, I burned up the stock suppressors on my "new" LK550 while tuning up on 10M at full; /archives//html/Amps/1999-06/msg00242.html (11,399 bytes)
43. [AMPS] More on 91b Problem, Any Ideas? (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Wed, 9 Jun 1999 12:34:01 -0400; 995 Tim, The HV readings sound OK, but the plate current is too low. That should be closer to 1 amp. If the Icom rig can successfully drive the amp to 1500W with 50W drive, then I can think of only; /archives//html/Amps/1999-06/msg00296.html (9,582 bytes)
44. [AMPS] FL7000 Help pse (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Wed, 9 Jun 1999 12:56:09 -0400; The 990's BAND DATA jack contains all the inputs and outputs required by the FL7000. It has the four BCD band data outputs, signal ground, a solid-state ground-on-transmit output, and a transmit-inhi; /archives//html/Amps/1999-06/msg00298.html (8,744 bytes)
45. [AMPS] Finally - a real amp (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Fri, 11 Jun 1999 12:53:19 -0400; and current That's too much plate and grid current. About how long was the amp key-down before the bang occured? had discovery laser. I'd be interested in hearing the group's theories on exactly wha; /archives//html/Amps/1999-06/msg00395.html (10,528 bytes)
46. [AMPS] Finally - a real amp (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Fri, 11 Jun 1999 17:50:52 -0400; ? Semi-agreed. However, under full drive, the grid/cathode potential is typically110v-peak, or 78V-rms. Grid dissipation is approx. 0.15a x 78v = 11.7w. The rated grid-dissipation is 20w. What part d; /archives//html/Amps/1999-06/msg00400.html (9,457 bytes)
47. [AMPS] 3-500Z pulls (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 15 Jun 1999 17:02:54 -0400; I just acquired three 3-500Z medical pulls from pulse service. I'm not thrilled with my test results, but maybe my expectations are too high. The tubes are guaranteed to be 100% output, but I'd say t; /archives//html/Amps/1999-06/msg00466.html (8,646 bytes)
48. [AMPS] go figure/Murata (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 29 Jun 1999 16:51:43 -0400; Probably the manufacturer's type number. -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amp; /archives//html/Amps/1999-06/msg00784.html (9,076 bytes)
49. [AMPS] Amp Tuning (was 3-500Z Grid Current Rating) (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 4 May 1999 15:12:04 -0400; always snip... output without paying snip... Thanks, Dave. I'm glad somebody finally said this. I've seen a lot of posts here about tuning for max output, and I've never been able to reconcile that; /archives//html/Amps/1999-05/msg00044.html (9,899 bytes)
50. [AMPS] LK550-ZC Troubleshooting (long) (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sat, 8 May 1999 02:54:40 -0400; Remember that LK550-ZC my friend is looking to sell? It's the one that blew it's fuses the first time he turned it on after 3 1/2 years of no use. Well, I finally got my hands on it, and need some tr; /archives//html/Amps/1999-05/msg00110.html (13,720 bytes)
51. [AMPS] LK550 Update (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 11 May 1999 17:14:33 -0400; Thanks for the replies to my queries on the LK550 -- I got some good info. The replies generally support my theory that arcs in the gassy tube caused plate choke damage (bunched turns), which in turn; /archives//html/Amps/1999-05/msg00140.html (9,752 bytes)
52. [AMPS] Glitch resistor (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Wed, 12 May 1999 21:27:19 -0400; While we're delving into glitch resistor design theory, how about some practical advice? Before replacing the plate choke, I'm going to install a glitch resistor in the LK550 I've been working on. KM; /archives//html/Amps/1999-05/msg00156.html (8,005 bytes)
53. [AMPS] HV PS topics (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Thu, 13 May 1999 17:33:15 -0400; you I hope you [AMPS]-ites won't think this is tiresome, but I need a review of exactly how the glitch resistor is supposed to function. I've seen some posts implying that the glitch resistor is supp; /archives//html/Amps/1999-05/msg00165.html (11,005 bytes)
54. [AMPS] HV PS topics (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Fri, 14 May 1999 00:42:36 -0400; I think you misunderstood what John said. He was talking about the value of the resistor KM1H suggested (15-ohm 25W), not the type. Try using the DELETE key. I'm simply trying to do a good job fixin; /archives//html/Amps/1999-05/msg00176.html (11,593 bytes)
55. [AMPS] HV PS topics (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sat, 15 May 1999 16:44:42 -0400; Thanks for all the messages of support. To save you all further aggravation, I've taken this "discussion" with Norm offline. 73, Dick, WC1M -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submis; /archives//html/Amps/1999-05/msg00184.html (7,861 bytes)
56. [AMPS] Followup: glitch resistor mounting (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Thu, 20 May 1999 01:28:35 -0400; Mounted a glitch resistor in the LK550 today. I found that John was right -- I couldn't screw down the resistor tabs on the ceramic standoffs tightly enough without fear that the ceramic threads woul; /archives//html/Amps/1999-05/msg00239.html (7,706 bytes)
57. [AMPS] Resoldering 3-500Z Filament Pins ?? (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Thu, 1 Apr 1999 15:28:44 -0500; Mike Thanks for being honest and telling us about your mishap with the tube. Makes me feel better about the two solid state transceivers I've smoked -- one with a single clumsy slip of the hand durin; /archives//html/Amps/1999-04/msg00019.html (9,103 bytes)
58. [AMPS] Resoldering 3-500Z Filament Pins ?? (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Fri, 2 Apr 1999 03:33:05 -0500; Hmmm. Indeed I must be remembering it wrong. The SB-200 used a pair of 572B's I think, and I see from my triode table that the 572B is typically run at 2400 volts, so I guess it wasn't that old SB-20; /archives//html/Amps/1999-04/msg00026.html (11,280 bytes)
59. [AMPS] re:Socket for 3-500Z (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sat, 3 Apr 1999 22:00:06 -0500; - 10w oil through the neoprene seal on the fan bearing chamber every 5 or so years of operation -- which is one of the reasons that we include a fan-oiling syringe with our vhf suppressor retrofit k; /archives//html/Amps/1999-04/msg00057.html (8,441 bytes)
60. [AMPS] 87A Ip Meter Problem Fixed! (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 5 Apr 1999 18:27:41 -0400; I should have posted a note about this earlier, but got real busy. As some of you may recall, my 87A developed this minor problem after about two years of service: in standby with key up, the lowest; /archives//html/Amps/1999-04/msg00087.html (9,408 bytes)

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