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Total 30 documents matching your query.

1. [Amps] FW: 3CX800 and 2000A vs 87A (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Thu, 19 Dec 2002 21:19:04 -0500
The fun snip snip Zero crossings...hmm...sounds like not enough filter C ! ;-) Jeff - K1LE - CT ><>
/archives//html/Amps/2002-12/msg00226.html (7,406 bytes)

2. [Amps] Re: 3CX800A's (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Sun, 22 Dec 2002 00:43:25 -0500
Hi John, I was being slightly facetious as "zero crossing" is something that is relied upon to interrupt arcing across the contacts of an AC circuit breaker. This is why the DC interrupting rating of
/archives//html/Amps/2002-12/msg00237.html (7,987 bytes)

3. [Amps] High Power class E transmitters - anyone interested? (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Thu, 21 Nov 2002 21:56:48 -0500
Steve, Is class E used at all for SSB aplications? Jeff - K1LE - CT ><>
/archives//html/Amps/2002-11/msg00335.html (7,860 bytes)

4. [Amps] Solid state amp advice needed (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Sun, 24 Nov 2002 23:06:01 -0500
Vic, I recently had problems working on a solid state final. The transistors idled fine but the minute I applied drive the collector current went way up and the output was low. I too, let the smoke o
/archives//html/Amps/2002-11/msg00360.html (10,287 bytes)

5. [Amps] Solid state amp advice needed (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Mon, 25 Nov 2002 16:20:28 -0500
Vic, You might want to just replace the bad transistors and maybe order a couple of spares. See how the others perform when you test per your plan. And, I think your plan is a good one. Watch the DC
/archives//html/Amps/2002-11/msg00372.html (9,387 bytes)

6. [Amps] Solid state amp advice needed (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Mon, 25 Nov 2002 16:54:46 -0500
Steve, You bring out a couple of good points, so let me pick your brain if you will: In your experience, where does a supply decoupling fault usually show up in a low Z solid state final. Do turn to
/archives//html/Amps/2002-11/msg00373.html (8,867 bytes)

7. [Amps] skin effect (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Sun, 6 Oct 2002 23:26:24 -0400
Steve, The 4 wires that you refer to in distribution systems most likely consist of 3 phases on top and a neutral below. Skin effect is taken into consideration in high current applications such as g
/archives//html/Amps/2002-10/msg00042.html (7,877 bytes)

8. [Amps] 4-400A Anode Voltage??? (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Mon, 21 Oct 2002 23:07:23 -0400
Rich, In your experience, roughly what maximum output power would you expect from a single 4-400, in GG configuration with 5 Kv anode voltage? Thanks, Jeff
/archives//html/Amps/2002-10/msg00221.html (7,502 bytes)

9. [Amps] 4-400A Anode Voltage??? (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Tue, 22 Oct 2002 10:38:15 -0400
Respectfully, my next questions are: What is the limiting factor. If the 4-400, operated as a triode, were capable of 1200w pep, would not the 3-500 be capable of 25% more? I'm making my assumption o
/archives//html/Amps/2002-10/msg00222.html (9,608 bytes)

10. [Amps] cap ratings in tank ckt (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Wed, 4 Sep 2002 14:09:57 -0400
Gentlemen, I'm repairing the pa board (100w) in an Icom 275H and need to replace all 3 of the monolithic chip capacitors in the output circuit, as they are burned open. I also need to replace the cer
/archives//html/Amps/2002-09/msg00021.html (7,640 bytes)

11. [Amps] cap ratings in tank ckt (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Thu, 5 Sep 2002 17:56:39 -0400
Hi: Steve, Colin, Todd, Thanks so much for your replies, they are very much appreciated. Steve, I've done little work with solid state rf pa design but long for understanding. I will try to describe
/archives//html/Amps/2002-09/msg00030.html (13,566 bytes)

12. [Amps] Use of 60Hz blowers on 50Hz mains for cooling ceramic triodes/tetrodes (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Wed, 14 Aug 2002 09:41:01 -0400
Mike, my guess is that it is not a synchronous motor, but an induction motor. A synchronous motor locks right into the AC synchronous speed and stays there. Hence, a 2 pole synchronous motor @ 60 Hz,
/archives//html/Amps/2002-08/msg00131.html (10,680 bytes)

13. [Amps] Drake L7 PS questions update (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Mon, 1 Jul 2002 21:25:59 -0400
Rich, Read the question again, carefully, and try again! Jeff - K1LE located modifications, equalizing
/archives//html/Amps/2002-07/msg00033.html (9,021 bytes)

14. [Amps] Drake L7 PS questions update (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Tue, 2 Jul 2002 11:49:41 -0400
This was not originally *my* question, I just felt that Rich did not accurately address it in his first reply, and I didn't want to miss the wisdom that might come forth should he reevaluate the ques
/archives//html/Amps/2002-07/msg00046.html (10,870 bytes)

15. [Amps] My new Toy. Off Topic... (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Tue, 9 Jul 2002 10:22:35 -0400
Gee, Rich, I wouldn't feel insulted by this statement at all, seriously. ...and if it were I that was referred to, I would feel honored to be considered as, and critiqued by, "friends". Jeff - K1LE -
/archives//html/Amps/2002-07/msg00135.html (8,021 bytes)

16. [Amps] Induction Motors was: Muffin Fans and hot exhaust (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Tue, 23 Jul 2002 11:36:22 -0400
Usually the run winding consists of larger wire than the start winding. Thus the X/R ratio is high and current is lagging voltage. The start winding is wound with smaller wire, thus it has a comparat
/archives//html/Amps/2002-07/msg00438.html (10,299 bytes)

17. [Amps] Induction Motors was: Muffin Fans and hot exhaust (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Thu, 25 Jul 2002 12:06:57 -0400
Thus could run Good question, Rich. I was going to say yes, but I didn't want to answer so quickly without taking a look at the type of motor that is often seen on blowers (with attached 1-4uf capaci
/archives//html/Amps/2002-07/msg00478.html (13,377 bytes)

18. [Amps] Solid state relay question (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Sun, 16 Jun 2002 13:24:59 -0400
draw Or, altering the voltage / current waveform to the supply primaries -- would be interesting to look at on a scope, without the RF bypass. Jeff - K1LE - CT
/archives//html/Amps/2002-06/msg00115.html (7,652 bytes)

19. [Amps] Transformer rewinding (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Mon, 6 May 2002 00:06:25 -0400
Firstly, I would like to say thank you to all that responded to my = questions per transformer rewinding. The information and web sites were = most informative. I will probably start with a low volta
/archives//html/Amps/2002-05/msg00045.html (8,040 bytes)

20. [Amps] Transformer secondary resistance (score: 1)
Author: K1LE@ARRL.NET (Jeffrey Madore)
Date: Mon, 6 May 2002 19:50:59 -0400
Thank you, gentlemen, for your responses re my questions pertaining to = the suitability of a transformer with a 106 Ohm secondary at 5300 volts = and a 120 volt primary. BTW I rechecked the primary
/archives//html/Amps/2002-05/msg00055.html (7,928 bytes)


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