Mail Archive Search: <+from:Peter.Chadwick@gpsemi.com>

Results:

References: [ +from:Peter.Chadwick@gpsemi.com: 141 ]

Total 141 documents matching your query.

1. No subject (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 10 Mar 1998 09:13:14 -0000; Real beer i.e. stuff with taste, is designed for room temperature drinking. Lagers are not. And 'standard' beers like Buttwiper Lite and Fosters go through the human frame and come out unchanged. I c; /archives//html/Amps/1998-03/msg00138.html (7,546 bytes)
2. No subject (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 10 Mar 1998 17:54:37 -0000; Could someone explain how 3000 watt, 50% duty cycle amplifiers are legal in the amateur service in the US? Or is my copy of Part 97 out of date? (Specifically 97.313, but 97.317 also implies that typ; /archives//html/Amps/1998-03/msg00152.html (7,571 bytes)
3. [AMPS] blowers (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Wed, 11 Mar 1998 09:29:03 -0000; I was told that the only way you can damage a tube with too much air is if you physically blow it out of the socket.............. But if you cut up a cardboard box and mount the tube socket and a can; /archives//html/Amps/1998-03/msg00165.html (8,347 bytes)
4. [AMPS] Tuners (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 13 Mar 1998 09:04:29 -0000; The cheapest route (depending on what you're doing) is to build one. Yes - real ham radio - make something!!! If you want a tuner to match anything when you take it out portable, you have different r; /archives//html/Amps/1998-03/msg00226.html (7,176 bytes)
5. [AMPS] RE;MFJ Tuners (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 13 Mar 1998 14:14:37 -0000; I have some MFJ stuff: a low pass filter which is pretty well made, and a keyer, which is electrically fine, but in which the mechanics are on the poor side - just not quite enough care in manufactur; /archives//html/Amps/1998-03/msg00234.html (6,894 bytes)
6. [AMPS] Tuned chokes (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 6 Feb 1998 09:02:31 -0000; Following the comments on tuned choke inputs, I agree with Bob and Rich: I use tuned choke inputs on my linear with great success. But you do need a suitably large cap for tuning - there is a fair am; /archives//html/Amps/1998-02/msg00026.html (7,542 bytes)
7. [AMPS] Contemplating building (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 6 Feb 1998 10:19:16 -0000; Further to comments from Rich and Bill, over here you can get 'microbore' copper tube for central heating - it's abt 5mm diameter. 3/16 or 1/4 inch copper tube is ideal for tank coils; at 500 watts,; /archives//html/Amps/1998-02/msg00027.html (7,971 bytes)
8. [AMPS] RE:Tuned chokes (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 6 Feb 1998 13:28:59 -0000; in >a 516F-2 S-line power supply that had failed. It was used in a lot of Marconi transmitters as well - that's where I first met it. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/ampfaq.ht; /archives//html/Amps/1998-02/msg00029.html (6,865 bytes)
9. [AMPS] tuned choke filters (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 9 Feb 1998 09:14:04 -0000; I don't totally agree with Rich: having plenty of output capacity has to help the dynamic regulation. A minor point is that the choke isn't resonated: it's close to resonance, but tuned slightly HF t; /archives//html/Amps/1998-02/msg00043.html (7,078 bytes)
10. [AMPS] Burnt resistors (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Fri, 2 Jan 1998 15:09:28 -0000; parasitic >suppressor resistors. Much increased ohms with no outward sign of damage >indicates VHF energy payed a visit. This leads to a question: Why is there no outward sign of damage? Is it a puls; /archives//html/Amps/1998-01/msg00003.html (7,322 bytes)
11. [AMPS] Flash-arc/Rocky Point effect (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 12 Jan 1998 11:18:21 -0000; I now have a copy of the paper - actually, it's a proof copy, so I can't tell you the date of publication, but it was about 1932/33. There's about 22 pages, and it was published by the IEE, (NOT IEEE; /archives//html/Amps/1998-01/msg00035.html (7,333 bytes)
12. [AMPS] Rocky point effect (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 13 Jan 1998 08:56:51 -0000; It's been suggested that 32 cents won't be enough. Stamp it up for a couple of ounces, and I'll do the photo copies and get them mailed out in California - that will save postage for everyone wanting; /archives//html/Amps/1998-01/msg00040.html (6,757 bytes)
13. [AMPS] matching (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 1 Dec 1997 10:17:03 -0000; Rich, you say that When we were discussing this matter here a few weeks ago, Tom indicated (although I may have misunderstood him) that the the output impedance is a 'non dissipative resistance'. Und; /archives//html/Amps/1997-12/msg00002.html (7,715 bytes)
14. [AMPS] conjugate matching (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 1 Dec 1997 12:45:22 -0000; What is negative resistance, then? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems:; /archives//html/Amps/1997-12/msg00005.html (6,703 bytes)
15. [AMPS] testing (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 8 Dec 1997 11:09:10 -0000; Amen to that, although on my Radiation Hazards course they said 10 to 15Kv. That in no way diminishes the warning that Rich makes, and anyone really going QRO ought to take it into consideration. Hav; /archives//html/Amps/1997-12/msg00125.html (7,046 bytes)
16. [AMPS] PIN diode switching (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 8 Dec 1997 11:30:34 -0000; It's worth getting the application notes on PIN diode switches, and Intermodulation products in PIN diodes from M/A COM. If there's aproblem , I may be able to help for the cost of the postage. 73 Pe; /archives//html/Amps/1997-12/msg00126.html (7,003 bytes)
17. [AMPS] parasitic suppressors (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 8 Dec 1997 14:48:20 -0000; Rich has said on a number of occasions, and, I believe, without contradiction, that it is well worthwhile measuring the value of parasitic suppressor resistors after a flashover. My question is:- Do; /archives//html/Amps/1997-12/msg00133.html (8,861 bytes)
18. [AMPS] PIN diodes (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 8 Dec 1997 15:32:21 -0000; Additionaly, Unitrode Corp did a very good Apps book. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contes; /archives//html/Amps/1997-12/msg00134.html (6,595 bytes)
19. [AMPS] arcs (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 9 Dec 1997 12:14:37 -0000; very >clear that in the vast majority of cases, after one or two BANGs early in life, >the tube continues on for a normal lifetime of normal performance, just as if >nothing had happened. If the caus; /archives//html/Amps/1997-12/msg00173.html (8,403 bytes)
20. [AMPS] G2DAF amps (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Mon, 15 Dec 1997 12:18:53 -0000; There was a lot of discussion in the pages of the then RSGB Bulletin when G2DAF first described the circuit. G6JP was extremely dubious about it. I guess that it is possible to analyse it: it will de; /archives//html/Amps/1997-12/msg00296.html (8,131 bytes)

Current List: 1 - 20
Page: [1] [2] [3] [4] [5] [6] [7] [8]