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1. [Amps] Pspice models for power grid tubes (score: 1): Author: Xmitters@aol.com; Date: Thu, 26 Jan 2006 10:30:03 EST; Hello: I'm new to this list and this is my first posting. I do a great deal of circuit analysis for broadcast and communications transmitter circuits and I would like to find either models, or the al; /archives//html/Amps/2006-01/msg00613.html (7,195 bytes)
2. [Amps] Pspice models for power grid tubes (score: 1): Author: Xmitters@aol.com; Date: Thu, 26 Jan 2006 11:28:09 EST; << The curves for 500v may be converted to other voltages by applying the 3/2 power law. The 3/2 power law is only applicable over a fairly narrow range. This approach is especially problematic when; /archives//html/Amps/2006-01/msg00616.html (8,213 bytes)
3. [Amps] GE EF-5A VHF Amplifier (score: 1): Author: Xmitters@aol.com; Date: Thu, 26 Jan 2006 13:58:46 EST; Hello Again :-) I have a General Electric EF-5A VHF power amplifier. I think it is Progress Line or Mastr Progress Line vintage, not sure. Every one of these amplifiers I have seen at hamfests a few; /archives//html/Amps/2006-01/msg00617.html (8,234 bytes)
4. [Amps] Doherty Calculations (score: 1): Author: Xmitters@aol.com; Date: Fri, 3 Feb 2006 00:44:18 EST; Hello: I'm interested in contacting someone on this list that is very familiar with the Constant Current curves and the calculations required to determine the operating parameters for an RF amplifier; /archives//html/Amps/2006-02/msg00049.html (8,067 bytes)
5. Re: [Amps] magnetics book and others (score: 1): Author: Xmitters@aol.com; Date: Thu, 16 Feb 2006 13:31:37 EST; << I did a search of his store. I know this isn't amps subject and I apologize. But I am in the WRONG business. select price sort by highest. >> Pricing is one thing, getting the asking price is quit; /archives//html/Amps/2006-02/msg00285.html (9,209 bytes)
6. Re: [Amps] Ebay and engineering books (score: 1): Author: Xmitters@aol.com; Date: Thu, 16 Feb 2006 21:16:57 EST; << Actually, I have gotten some real deals off ebay, you just have to keep looking for them. My whole electrical/electronic, and mechanical engineering library came from there with a few through Abe; /archives//html/Amps/2006-02/msg00299.html (9,175 bytes)
7. Re: [Amps] GG Class C (score: 1): Author: Xmitters@aol.com; Date: Fri, 17 Feb 2006 03:48:21 EST; << s it possible and/or feasible to put a grounded grid linear into Class C? Reason I ask is my old Tempo/Henry 6n2 is used almost exclusively for WSJT modes and they all do fine on Class C since the; /archives//html/Amps/2006-02/msg00304.html (12,148 bytes)
8. Re: [Amps] Figuring out tube output impedance (score: 1): Author: Xmitters@aol.com; Date: Mon, 27 Feb 2006 14:14:45 EST; << I see a lot of formulae(is that plural???) on determining the output impedance of a tube. some say just plain plate volts divided by plate current, some have a 1.8 x formula and so on. I Want to d; /archives//html/Amps/2006-02/msg00630.html (8,898 bytes)
9. Re: [Amps] 4CX250B and data sheets in general. (score: 1): Author: Xmitters@aol.com; Date: Tue, 4 Apr 2006 11:16:02 EDT; << But then we have the Eimac data sheet for the 4CX250R, which includes a set of operating conditions to squeeze 400W PEP out of a single tube. Not surprisingly, the 3rd-order IMD then increases to; /archives//html/Amps/2006-04/msg00043.html (9,781 bytes)
10. Re: [Amps] Plate Impedance (score: 1): Author: Xmitters@aol.com; Date: Mon, 10 Apr 2006 13:35:28 EDT; << All, I started reading through the RCA Radiotron Handbook this evening looking for where the factor of 1.8 is listed for calculating the plate impedance of a class AB amplifier, and I cannot find; /archives//html/Amps/2006-04/msg00146.html (13,346 bytes)
11. Re: [Amps] RCA load impedance calculation (score: 1): Author: Xmitters@aol.com; Date: Mon, 10 Apr 2006 21:48:02 EDT; << Gerald, I went ahead and brought the RCA transmitting tube manual TT-5 here to quote what it says. Effective RF load resistance; 2 x (Eb - Ebmin) / Ibo Ibo = Zero signal plate current "Ibo should; /archives//html/Amps/2006-04/msg00159.html (7,309 bytes)
12. Re: [Amps] Eimac and Econco (score: 1): Author: Xmitters@aol.com; Date: Wed, 12 Apr 2006 10:52:15 EDT; << [I]I have just heard that CPI/EIMAC will be consolidating the EIMAC and ECONCO manufacturing plants into a single, integrated, facility and that EIMAC and ECONCO tubes will be unavailable for a co; /archives//html/Amps/2006-04/msg00194.html (7,734 bytes)
13. [Amps] WLW 500 kW transmitter (score: 1): Author: Xmitters@aol.com; Date: Tue, 16 May 2006 18:20:16 EDT; Hello: I'm doing a mathematical analysis on the RF PA of the WLW 500 kW transmitter, which consists of three 167 kW RF amplifiers into a combiner. The RF amplifiers are RF transformer coupled; the pr; /archives//html/Amps/2006-05/msg00152.html (8,151 bytes)
14. Re: [Amps] WLW 500 kW transmitter (score: 1): Author: Xmitters@aol.com; Date: Tue, 16 May 2006 19:21:56 EDT; << I think I have some info here in a transformer book, and will try to locate the one it's in. To my opinion, those shields will have to be taken into account on the formulas also. Oh by the way, be; /archives//html/Amps/2006-05/msg00159.html (8,690 bytes)
15. Re: [Amps] WLW 500 kW transmitter (score: 1): Author: Xmitters@aol.com; Date: Tue, 16 May 2006 22:02:36 EDT; << eff, I'm glad the book work was dug up. Was the Harris manuals the originals that were supposed to be missing, or copies that Harris had when it was originally built? What I had heard was the manu; /archives//html/Amps/2006-05/msg00169.html (9,786 bytes)
16. Re: [Amps] WLW 500 kW transmitter manual (score: 1): Author: Xmitters@aol.com; Date: Wed, 17 May 2006 12:33:39 EDT; Jim Hawkins has an absolutely awesome website. There is a partial WLW manual there. No schematics, however. Jeff Glass Northern Illinois University _______________________________________________ Amp; /archives//html/Amps/2006-05/msg00193.html (6,787 bytes)
17. Re: [Amps] WLW 500 kW design (score: 1): Author: Xmitters@aol.com; Date: Tue, 23 May 2006 14:03:08 EDT; << It does say that the Q of the plate 'winding' was 1200, really high for a coil made from tubing! Since the position of the two spirals was adjustable from the front panel (for the loading or coupl; /archives//html/Amps/2006-05/msg00290.html (8,316 bytes)

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