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References: [ +from:royanjoy@ncn.net: 309 ]

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61. [AMPS] Re: Pair 572-B GG input Z (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 23 Jul 1999 15:46:58 -0500; "I need the approximate input impedance for a pair of 572-B's?? I am working on the input matching on an SB-200 to six meters. Abt 60ohms??" More on the order of 200-ohms. Roy K6XK -- FAQ on WWW: htt; /archives//html/Amps/1999-07/msg00428.html (6,670 bytes)
62. [AMPS] Re: Power Ratings (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Mon, 26 Jul 1999 15:14:03 -0500; "Read the regulations carefully and it seems that CW ops got about a 3 dB boost but, SSB mode operators (and AM'ers; all 7 of them remaining...) actually lost!!!..." But, we were relieved of the task; /archives//html/Amps/1999-07/msg00479.html (6,739 bytes)
63. [AMPS] Re: Replacement for 572B's (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Tue, 27 Jul 1999 15:48:38 -0500; "So hypothetically at this time..... What tube do you guys think would be the easiest tube conversion to use for six meters in an already existing SB-200? It would be great to use the same pwr supply; /archives//html/Amps/1999-07/msg00543.html (7,057 bytes)
64. [AMPS] Re: Questions about the AL-811H (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Sun, 6 Jun 1999 15:41:01 -0500; Re: States amateurs are allowed only 250 watts on 10.1 MHz. You should check the power allowed in your country..... 73 Jim W7RY<<<<< For the sake of preciseness, make that 200 watts. 73, Roy K6XK --; /archives//html/Amps/1999-06/msg00168.html (6,886 bytes)
65. [AMPS] Re: Need Teflon Tubing... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Mon, 21 Jun 1999 12:00:54 -0500; Amidon sells the tape. They also sell the #10 & #12 enameled wire. Don't see why you'd need the tubing over the wire tho? How about using bi-filar #14 in parallel for easier winding? 73, Roy K6XK --; /archives//html/Amps/1999-06/msg00563.html (6,917 bytes)
66. [AMPS] Re: Strange Tube Problem (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 23 Jun 1999 15:46:10 -0500; About twelve years ago I bought a new pair of Eimac 3-500Z's. They operated normally for about 20-minutes; then I heard a "tick" sound and one tube was glowing bright purple, like an argon lamp. Plat; /archives//html/Amps/1999-06/msg00609.html (6,720 bytes)
67. [AMPS] Re: Another Doorknob Query (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 24 Jun 1999 11:33:37 -0500; Hi Vic, Personally, I'd like to see double the 6 KV rating used, plus at least two caps in parallel to share the current for the blocking application. As for the ceramic padders, I have tried many in; /archives//html/Amps/1999-06/msg00656.html (7,347 bytes)
68. [AMPS] Re: Winding QRO Toroids (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Fri, 25 Jun 1999 16:18:31 -0500; "I am beginning the process of winding some toroid coils that are going to be used in a 1500 watt hf amp. The cores are T-225 and are supposedly good for 1500 watts but I figure to be safe I will use; /archives//html/Amps/1999-06/msg00713.html (7,396 bytes)
69. [AMPS] Re: Winding QRO Toroids (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Mon, 28 Jun 1999 15:11:49 -0500; Hi Tom, you asked, Roy, "When you wrap the core with the double leayer of glass tape, do you use dope or anyother substance on the glass? I am trying to figure this out. I read an article by Jerry Pi; /archives//html/Amps/1999-06/msg00752.html (8,003 bytes)
70. [AMPS] Re: 100 kHz... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Tue, 4 May 1999 17:05:45 -0500; Bill, don't laff, but many Hi-Fi amps are rated for this requirement. (!). 73, Roy K6XK amplifier for NMR research. Any ideas?? Gain must be stable as well.<<<< -- FAQ on WWW: http://www.contesting.c; /archives//html/Amps/1999-05/msg00051.html (6,652 bytes)
71. [AMPS] Re: Cap ID (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 12 May 1999 17:34:22 -0500; Pete, you asked, "I was wondering if anyone had any information on the following capacitor. My main concern is how much voltage it can handle. The capacitor is 1 3/4" in dia. and 9/16' thick. Yellow; /archives//html/Amps/1999-05/msg00154.html (7,106 bytes)
72. [AMPS] Re: Cap ID (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 13 May 1999 08:18:08 -0500; "Does yours Say HI-Q HPA on it? 73 Pete N4KW" Nope; solly. 73 Roy -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contestin; /archives//html/Amps/1999-05/msg00161.html (6,598 bytes)
73. [AMPS] FS--A few good glitch resistors (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 13 May 1999 09:11:15 -0500; If anybody is hard up for a glitch resistor source, I have a few high quality 10.7 ohm 50 watt wirewound solenoid enameled ceramics which I will part with for a measly $16 each including priority mai; /archives//html/Amps/1999-05/msg00162.html (7,151 bytes)
74. [AMPS] Re: Looking for RFC-1... (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Tue, 18 May 1999 15:21:47 -0500; Hi, The 2.5 mH RFC is the commonist of chokes. It's called a PI-wound RFC, and Mouser sells one, part #434-2250 for $2.53. This is a very uncritical application just preventing any DC component to ap; /archives//html/Amps/1999-05/msg00213.html (6,811 bytes)
75. [AMPS] Re: 2.5Mh-rfc (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 19 May 1999 14:14:51 -0500; Jim, All good points. The exploding RFC was a pretty good clue however, to QRT fast! Actually, the DC at the antenna connector I was referring to was static build-up from an un-DC grounded antenna, w; /archives//html/Amps/1999-05/msg00233.html (7,748 bytes)
76. [AMPS] Re: Brightest Bottles (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 19 May 1999 14:54:21 -0500; I vote for the 304-TL. When a young novice, I saw an OT's homebrew running 304-TLs modulated by 304-TLs. Which I can still see the opposite colored light from now when I close my eyes at night. Roy -; /archives//html/Amps/1999-05/msg00234.html (7,239 bytes)
77. [AMPS] Re: Brightest & Tenth Commandment (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 20 May 1999 17:03:58 -0500; In order to discourage would-be illegal ham band intruders from sinning (coveting our bands) I think it should be encouraged that everyone run the legal power limit at all times. That way the bands w; /archives//html/Amps/1999-05/msg00248.html (7,834 bytes)
78. [AMPS] Re: Ferrite Rod for 6M Amp (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 26 May 1999 14:23:20 -0500; Harry, Amidon lists material 61 rods for such use up to 200mHz. 73, Roy K6XK -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUES; /archives//html/Amps/1999-05/msg00308.html (7,779 bytes)
79. [AMPS] Re: Ferrite Rod for 6M Amp (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Wed, 26 May 1999 16:34:56 -0500; All, "Harry, ? the manufacturer. of 61 material rates it at 10MHz. At 14MHz, I can see waveform distortion on an oscilloscope. - later, Roy Rich..." Quoting from Amidon flyer: "Material 61 (u=125) ..; /archives//html/Amps/1999-05/msg00314.html (8,657 bytes)
80. [AMPS] Input Tuning (score: 1): Author: royanjoy@ncn.net (Roy Koeppe); Date: Thu, 1 Apr 1999 09:31:04 -0600; The approximate values are, SB-200: 200 ohms; 3-500Zs (pair): 54 ohms. These are from memory cells, others can tweat them for you. 73, Roy K6XK Howdy All, KK5YY Jerry the new guy here with a question; /archives//html/Amps/1999-04/msg00010.html (7,675 bytes)

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