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21. Re: [Amps] Bird Element Calibration? (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Mon, 21 Mar 2005 09:17:21 +0000; Peter, Sadly, there are many that fail to appreciate that there is any difference between resolution and accuracy! Regards. Mark. ** Mark Hill - G4FPH E-mail: g4fph@mjha.co.uk Current web pages at: w; /archives//html/Amps/2005-03/msg00445.html (8,972 bytes)
22. Re: [Amps] Bird Element Calibration? (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Mon, 21 Mar 2005 12:49:23 +0000; Paul, Thanks for your experience. A 20% low reading on topband would be getting to the edge of my tolerance band. Hey, I bet Bird would make a special 1.8 to 30 MHz slug for members' of Amps if we ma; /archives//html/Amps/2005-03/msg00447.html (12,664 bytes)
23. Re: [Amps] Bird Element Calibration? (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Mon, 21 Mar 2005 17:19:51 +0000; Gary, Indeed so! When replying to the FCC, I believe the text goes something like: "I dare not run QRP because I only have a 10k element for my Bird and if I don't get the pointer to top-scale, I can; /archives//html/Amps/2005-03/msg00458.html (10,251 bytes)
24. [Amps] Beer drinking opportunity! (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Mon, 21 Mar 2005 17:22:11 +0000; Folks, Any of you going to the NAB show in Vegas this April? I'm expecting to be there for a few days and would hate to pass on the opportunity for a beer or two! Regards. Mark. ** Mark Hill - G4FPH; /archives//html/Amps/2005-03/msg00459.html (7,128 bytes)
25. [Amps] Bird 'H' series inserts: Performance on 160 (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Tue, 29 Mar 2005 12:45:25 +0100; Folks, Well I sat back and enjoyed (most of) the thread about RF power measurement. I thank David for his mathematical derivation of RMS power. I cannot think of a use for it either, but note that it; /archives//html/Amps/2005-03/msg00673.html (8,461 bytes)
26. Re: [Amps] Bird 'H' series inserts: Performance on 160 (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Tue, 29 Mar 2005 18:51:34 +0100; Gary, Aah! That's where the 'rough science' part comes in. I used my Jap. Daiwa (that is at least spec'd down to 1.8 MHz) as reference! Actually the Daiwa correlates quite well against the Bird on HF; /archives//html/Amps/2005-03/msg00691.html (9,090 bytes)
27. Re: [Amps] MLA-2500B Question (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Tue, 29 Mar 2005 21:13:44 +0100; Folks, Cutting the manufacturers' some slack for penny-pinching (I must be feeling generous tonight!) isn't it merely that the practice (era) of not including tuned input was more likely based on an; /archives//html/Amps/2005-03/msg00699.html (10,543 bytes)
28. Re: [Amps] 3cx3000a7 (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Wed, 30 Mar 2005 00:02:17 +0100; Joe, I think Henry may have used some sort of transformer arrangement in it's 8k Ultra amplifier? The discussion about flywheel-effect going on now is relevant to this as one possible approach. Perso; /archives//html/Amps/2005-03/msg00709.html (8,839 bytes)
29. [Amps] ID IOT IC powered station wanted for exciting new project! (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 01 Apr 2005 16:15:00 +0100; Joe, I hear and enjoy all the talk about 'tubes with handles' and very much look forward to future discussions here regarding 'tubes on wheels'! I trust that somebody with friends in the right places; /archives//html/Amps/2005-04/msg00012.html (8,497 bytes)
30. Re: [Amps] FS GE VARIAC 0-280V 30AMPS (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 01 Apr 2005 17:38:40 +0100; Chris, Sounds nice, but surely a struggle for anyone to 'pick up'! Forgive me, but it is Friday and I have no clean jokes to attach. Regards. Mark. -- At 16:30 01/04/2005, you wrote: ** Mark Hill - G; /archives//html/Amps/2005-04/msg00017.html (7,844 bytes)
31. Re: [Amps] FR RELAYS (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 06 May 2005 19:12:51 +0100; Joe, I have had good results with low cost (10 Euro) relays designed for switching single phase mains electric power (230 Volt, 20 Amp rating) with a 3CX3000A7 up as far as 20 metres. The relays tend; /archives//html/Amps/2005-05/msg00115.html (8,531 bytes)
32. Re: [Amps] Question abt slug (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 27 May 2005 23:30:58 +0100; Fred, I suggest you down load the Bird 43 manual from the Bird Electronic website. Figure 6 and the text on page 15 of the manual may provide some help. Regards. Mark. ** Mark Hill - G4FPH E-mail: g4; /archives//html/Amps/2005-05/msg00310.html (8,309 bytes)
33. Re: [Amps] Two Tone Generator (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 30 Sep 2005 09:55:46 +0100; Folks, My original two tone test generator used op. amps., with light bulbs for amplitude stabilisation. It was always trouble and I consigned it to the 'recycle for bits' bin some years back. There'; /archives//html/Amps/2005-09/msg00378.html (9,521 bytes)
34. Re: [Amps] Drake L4 with 3-400Z photos (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 14 Oct 2005 09:31:32 +0100; Jason, Wow - nice pictures! Makes the effort on my website look somewhat lame. Having consciously eliminated all the glowing valves from the shack in favour of soul-less metal anode types, I realise; /archives//html/Amps/2005-10/msg00351.html (8,903 bytes)
35. Re: [Amps] HT........................... (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 14 Oct 2005 11:18:22 +0100; John, I particularly enjoyed the video of the transformer cum welding torch! To anyone contemplating replacing a fuse in their 'breaker box' with a chunk of steel bar to stop the darn thing blowing d; /archives//html/Amps/2005-10/msg00355.html (8,120 bytes)
36. [Amps] Amp Supply LK450 Manual (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 28 Oct 2005 13:41:38 +0100; Folks, Does anyone have a soft copy of the above they could e-mail to me? Regards. Mark. ** Mark Hill - G4FPH E-mail: g4fph@mjha.co.uk Current web pages at: www.g4fph.net Old web pages at: www.qsl.ne; /archives//html/Amps/2005-10/msg00648.html (6,656 bytes)
37. Re: [Amps] Amp Supply LK450 Manual (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 28 Oct 2005 20:37:05 +0100; Rich, I recommend you do the other three things too before sticking any part of your anatomy inside, not to mention squirting lots of anti-parasitic spray around just in case the devils ever prove to; /archives//html/Amps/2005-10/msg00661.html (7,908 bytes)
38. Re: [Amps] Is This 4CX1600B Still Good? (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Wed, 23 Nov 2005 10:22:11 +0000; Mike, Is the heater of the 4CX glowing? Regards. Mark. ** Mark Hill - G4FPH E-mail: g4fph@mjha.co.uk Current web pages at: www.g4fph.net Old web pages at: www.qsl.net/g4fph -- Dipoles resonant on 194; /archives//html/Amps/2005-11/msg00450.html (8,299 bytes)
39. Re: [Amps] 4CX800 & GS35B (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Mon, 28 Nov 2005 12:17:46 +0000; Mike, GS35B are regularly run with up to 4 kV on the anode, seemingly without problems, sometimes even more. Some useful info. on this site: http://www.nd2x.net/tube-1.html As most of this Russian st; /archives//html/Amps/2005-11/msg00503.html (8,960 bytes)
40. Re: [Amps] Pspice models for power grid tubes (score: 1): Author: Mark Hill <g4fph@mjha.co.uk>; Date: Fri, 27 Jan 2006 09:34:09 +0000; Jeff, David has collected lots of valve data, available at: http://www.g8wrb.org/ Regards. Mark. ** Mark Hill - G4FPH E-mail: g4fph@mjha.co.uk Current web pages at: www.g4fph.net Old web pages at: ww; /archives//html/Amps/2006-01/msg00623.html (11,492 bytes)

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