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1. [Amps] A little petition, but Off topic (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Sun Jul 27 12:16:48 2003; Sorry for this message being off topic, but considering the experience of the rest of the people in this list I give it a try: maybe somebody can help me with an old piece of test equipment I have; I; /archives//html/Amps/2003-07/msg00131.html (6,901 bytes)
2. [Amps] 572B's WARNING (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Sun Jun 15 09:20:51 2003; Regarding Taylor brand, I purchased a year or so ago one Taylor 813 for a friend's linear and it was labeled as Made in China clearly. Dealer was RF Parts and I was aware of tube's origin. If your ne; /archives//html/Amps/2003-06/msg00094.html (9,445 bytes)
3. [Amps] 4CX250B/F (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Thu Jun 19 08:31:34 2003; Reading RCA manual I've seen that 4CX250B (6V heater) tube requires no warm-up period, but 4CX250F (26 V heater) a 30 seconds period, why the difference? Best regards and TIA Guillermo - LU8EYW.; /archives//html/Amps/2003-06/msg00130.html (6,833 bytes)
4. [Amps] 4CX250B/F (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Fri Jun 20 08:23:00 2003; Thanks for all the answers; the book I am talking is a re-print copy of RCA TT-20 manual (bought at RF Parts) which has specifications for power tubes. I think also (after reading the answers), eithe; /archives//html/Amps/2003-06/msg00163.html (6,995 bytes)
5. [Amps] 4CX250B/F (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Sun Jun 22 09:30:11 2003; If this means to apply HV after the warm up period one must place a timer for the HV transformers, which could be the reason of doing it?. What potential problem could this delay prevent?. Best regar; /archives//html/Amps/2003-06/msg00177.html (7,921 bytes)
6. [Amps] re Reduction of 50hz hum via metal plate (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Sat Jun 28 08:31:57 2003; I don't figure why, but (here we also have 50 Hz line frequency) with many transformers we have hum, adding a thick (1.5 mm) carton between transformer and chassis completely solve the problem; in ex; /archives//html/Amps/2003-06/msg00233.html (10,557 bytes)
7. [Amps] Henry Tempo 2000 (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Fri May 23 09:27:15 2003; Some time ago I posted a message regarding broken filament connections in a pair of 3-500Z, and asked the proper method for resoldering their pins. I got the AG/Sn solder and resoldered them with car; /archives//html/Amps/2003-05/msg00175.html (7,268 bytes)
8. [Amps] modern 811 designs? (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Sun Apr 6 18:42:31 2003; Dan Evans escribi?: As I've seen a few minutes ago, this GI7B is a very different tube than 811, and also, it's rated upto 2.7 GHz!. I don't even know its cost, but, could it be convenient for an HF; /archives//html/Amps/2003-04/msg00060.html (7,645 bytes)
9. [Amps] Amps Reflector (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Sun Mar 2 14:33:26 2003; "J. Leon Pringle, Jr and Audrey S. Pringle" escribi?: My very humble opinion (I'm nearly a prehistoric cavern man regarding most matters discussed here, and never felt treated as foolish, but all the; /archives//html/Amps/2003-03/msg00028.html (8,778 bytes)
10. [Amps] T400012208 rectifier (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Tue Mar 4 21:35:34 2003; Hello Dan, What I've found at first is only the following data: T400012208: SILICON CONTROLLED RECTIFIER, 100V V(DRM),35A I(T), TO-208AA also, there are three manufacturers for it: American Microsemi; /archives//html/Amps/2003-03/msg00144.html (8,180 bytes)
11. [Amps] Use of Manual T/R Switches (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Thu Mar 6 18:53:42 2003; Seems to me that lots of Corona have done it again in this topic. There's no washer for that. :) Best regards Guillermo - LU8EYW. dj2001@mn.rr.com escribi?:; /archives//html/Amps/2003-03/msg00274.html (10,784 bytes)
12. [Amps] Arcing (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Sat Mar 8 11:45:39 2003; rlm escribi?: In past lab practice tests at school we drove some relay coils on-off frequently, and as Rich, have measured (...) pulses upto 800 V across the coil, with nominal operating value; then; /archives//html/Amps/2003-03/msg00339.html (8,973 bytes)
13. [Amps] 813 No parasitics (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Mon Mar 17 21:54:49 2003; Ok, you asked Skip; but let me suggest or better saying, ask, could be the 30 MHz highest frequency for full ratings?, or maybe at lower ratings you could have parasitics also?. Best regards Guillerm; /archives//html/Amps/2003-03/msg00656.html (8,299 bytes)
14. [Amps] Capacitance Amount Formula (score: 198): Author: nagato at arnet.com.ar (Guillermo); Date: Mon Feb 10 18:09:37 2003; Date's month place is the second one, so it was posted last (10) Sunday (at least, that's our format in my country). Also, I agree with Alek. Best regards Guillermo - LU8EYW. Jim Reid escribi?:; /archives//html/Amps/2003-02/msg00234.html (9,100 bytes)
15. [Amps] Question on Ameritron amp wattmeter circuit (score: 198): Author: nagato at arnet.com.ar (Guillermo); Date: Mon Feb 10 18:28:09 2003; You may find that the center or pass through conductor in the toroid is shielded, to avoid electrostatic coupling with secondary's transformer and give a better higher frequency response. Best regard; /archives//html/Amps/2003-02/msg00235.html (9,949 bytes)
16. [Amps] 3-500Z filament (score: 198): Author: nagato at arnet.com.ar (Guillermo); Date: Tue Feb 18 22:07:32 2003; Hello, a friend have trouble in his linear with (apparently, I did not check it by now, but that seems to be the problem) a faulty contact in filament tube pins. If not a socket faulty contact and If; /archives//html/Amps/2003-02/msg00368.html (6,577 bytes)
17. [Amps] 3-500z filament (score: 198): Author: nagato at arnet.com.ar (Guillermo); Date: Thu Feb 20 07:30:42 2003; Thanks for the answers regarding the subject.We'll try to acquire Ag/Sn solder if we can, if not possible will try with 60/40 solder. Thanks for the information. Best regards Guillermo.; /archives//html/Amps/2003-02/msg00388.html (6,323 bytes)
18. [Amps] KNOB ORIENTATION (score: 198): Author: nagato at arnet.com.ar (Guillermo); Date: Mon Feb 24 18:43:27 2003; My known standard is that when it has all plates out, cursor should be pointing at 3 o'clock (for those with 180? movement). If all plates are fully meshed it should indicate 9 o'clock. Best regards; /archives//html/Amps/2003-02/msg00440.html (7,908 bytes)
19. [Amps] Relay for VHF amp (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Wed Aug 6 09:50:32 2003; Hello, I'm searching for a replacement relay for a Mirage B 1080 2M amplifier; part number is A410-364385-00, it's DPDT, 12 VDC coil, from Guardian Elec. MFG. It also states in the case "W1-1365 Seri; /archives//html/Amps/2002-09/msg00331.html (6,462 bytes)
20. [Amps] Relay for VHF amp (score: 198): Author: nagato at arnet.com.ar (GGLL); Date: Thu Aug 7 06:45:10 2003; Many thanks for the answers, all very useful; I have located two another sources. The last, the most common and also a place where I've searched lots of times previously for other items (and which I'; /archives//html/Amps/2002-09/msg00340.html (7,208 bytes)

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