Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Linear\s+AMP\s+timing\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[AMPS\]\s+Linear\s+AMP\s+timing\s*$/: 22 ]

Total 22 documents matching your query.

1. [AMPS] Linear AMP timing (score: 1): Author: dcoolica@planet.eon.net (Denis Coolican); Date: Mon, 06 Aug 2001 22:44:49 -0500; On a Linear Amplifier would having the output relay of the amplifier operate 20 millisecs before the input relay be sufficient to keep RF from being on the output contacts before they are closed? Den; /archives//html/Amps/2001-08/msg00074.html (7,600 bytes)
2. [AMPS] Linear AMP timing (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 7 Aug 2001 02:32:15 -0400; 2 milliseconds is enough, as long as it is always there and the contacts don't bounce that long.Most relays are done bouncing within 1 ms. Be sure it opens AFTER the input relays opens also! 73, Tom; /archives//html/Amps/2001-08/msg00075.html (8,014 bytes)
3. [AMPS] Linear AMP timing (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 7 Aug 2001 08:12:43 +0100; This depends a bit on the form of the relay. If the relay at the output is a changeover type, then you still can get the hot switching problem, albeit only(!) with the drive power. It is all very de; /archives//html/Amps/2001-08/msg00076.html (9,005 bytes)
4. [AMPS] Linear AMP timing (score: 1): Author: 2@vc.net (2); Date: Tue, 7 Aug 2001 07:28:51 -0700; // Hotswitching of the RF input relay contacts is half of the problem. This can be ameliorated by replacing the transceiver's amplifier control relay with a switching transistor, and by using an inp; /archives//html/Amps/2001-08/msg00078.html (10,413 bytes)
5. [AMPS] Linear AMP timing (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 7 Aug 2001 12:35:11 -0400; Of course it never hurts to measure an unknown, but virtually all relays useful in amplifiers take far less than 20ms to switch. Typical open frame 20 ampere relays switch in 12 mS or less. The only; /archives//html/Amps/2001-08/msg00081.html (9,498 bytes)
6. [AMPS] Linear AMP timing (score: 1): Author: kl7ra@blizzard.gcgo.nasa.gov (kl7ra); Date: Tue, 7 Aug 2001 10:36:51 -0800; I spent an afternoon measuring different relay latch and drop times using a test setup with 10KHz pulses and HP counter. The project was to modify the WX0B Stack Matcher to transmit using all the ant; /archives//html/Amps/2001-08/msg00083.html (9,795 bytes)
7. [AMPS] Linear AMP timing (score: 1): Author: w7ti@dslextreme.com (Bill Turner); Date: Wed, 08 Aug 2001 08:48:26 -0700; _________________________________________________________ In all this discussion, nobody has mentioned the bias switching. IMO, the amp should not be biased on until all the relays have closed and mu; /archives//html/Amps/2001-08/msg00090.html (8,107 bytes)
8. [AMPS] Linear AMP timing (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 08 Aug 2001 14:37:01 -0400; Well, I don't know, but when the T/R relay on my SB-220 began to stick in the "on" position, it turned out to be the bias contacts that were the worst burnt. Maybe a sign that they were trying to ope; /archives//html/Amps/2001-08/msg00091.html (8,645 bytes)
9. [AMPS] Linear AMP timing (score: 1): Author: w7ti@dslextreme.com (Bill Turner); Date: Wed, 08 Aug 2001 16:24:44 -0700; _________________________________________________________ The contacts must be opening more than just bias, most likely the actual cathode current. Since this is DC, you should be able to suppress th; /archives//html/Amps/2001-08/msg00093.html (9,010 bytes)
10. [AMPS] Linear AMP timing (score: 1): Author: 2@vc.net (2); Date: Wed, 8 Aug 2001 18:16:43 -0700; /\ Please explain why. tnx - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests; /archives//html/Amps/2001-08/msg00095.html (9,141 bytes)
11. [AMPS] Linear AMP timing (score: 1): Author: 2@vc.net (2); Date: Wed, 8 Aug 2001 18:16:46 -0700; // The Ic is normally 0.15A - which should not crispy-critter 10A ontacts. // Good idea for arc quenching. However, 0.15A should not be a problem. My guess is that the problem is related to the use; /archives//html/Amps/2001-08/msg00096.html (9,813 bytes)
12. [AMPS] Linear AMP timing (score: 1): Author: wd7s@arrl.net (Paul Hewitt); Date: Wed, 8 Aug 2001 18:32:19 -0700; Hi Bill IMHO the best way to control bias/cathode current is by means of solid-state switching. It will be faster than either I/O relay operating at <2ms make and <1ms break. The bias (on/off)control; /archives//html/Amps/2001-08/msg00097.html (9,761 bytes)
13. [AMPS] Linear AMP timing (score: 1): Author: w7ti@dslextreme.com (Bill Turner); Date: Wed, 08 Aug 2001 18:46:41 -0700; _________________________________________________________ It will make it impossible for a tube to be momentarily unloaded, either at the input or output. Bill, W7TI -- FAQ on WWW: http://www.contest; /archives//html/Amps/2001-08/msg00098.html (8,607 bytes)
14. [AMPS] Linear AMP timing (score: 1): Author: w7ti@dslextreme.com (Bill Turner); Date: Wed, 08 Aug 2001 18:46:43 -0700; _________________________________________________________ I agree about solid-state switching, but IMO, the tube should be still biased off until switching is complete, both input and output. Otherwi; /archives//html/Amps/2001-08/msg00099.html (9,044 bytes)
15. [AMPS] Linear AMP timing (score: 1): Author: wd7s@arrl.net (Paul Hewitt); Date: Wed, 8 Aug 2001 19:04:50 -0700; I don't know how you test a new amp for stability but an unloaded state is the best way. If it's not stable unloaded then it's not stable. What the hell is "every amp manual" ? Paul Paul Hewitt WD7S; /archives//html/Amps/2001-08/msg00100.html (10,060 bytes)
16. [AMPS] Linear AMP timing (score: 1): Author: w7ti@dslextreme.com (Bill Turner); Date: Wed, 08 Aug 2001 19:05:13 -0700; _________________________________________________________ That wasn't the quote. It was "every amp manual I've seen". Pay attention. Bill, W7TI -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submi; /archives//html/Amps/2001-08/msg00101.html (8,602 bytes)
17. FW: [AMPS] Linear AMP timing (score: 1): Author: wd7s@arrl.net (Paul Hewitt); Date: Wed, 8 Aug 2001 19:49:34 -0700; Attention I have, your quoted reference material I don't, There's enough hearsay/bull on this reflector. If you quote it, either know it or be prepared to reference to it! Paul Paul Hewitt WD7S PRODU; /archives//html/Amps/2001-08/msg00103.html (8,891 bytes)
18. [AMPS] Linear AMP timing (score: 1): Author: g3vbl@netcomuk.co.uk (Chris Pedder); Date: Thu, 09 Aug 2001 08:20:56 +0000; Hi, Some ten or fifteen years ago I used a circuit from the ARRL Handbook to produce a sequencer (the original was perhaps used for remote pre-amp switching). The sequence was: 1 Amp output relay (Ki; /archives//html/Amps/2001-08/msg00105.html (8,979 bytes)
19. [AMPS] Linear AMP timing (score: 1): Author: 2@vc.net (2); Date: Thu, 9 Aug 2001 06:27:48 -0700; // In transceivers, there is no RF output after the RX signal is sent to the amp relay-control line. cheers, Bill - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http; /archives//html/Amps/2001-08/msg00108.html (8,474 bytes)
20. [AMPS] Linear AMP timing (score: 1): Author: 2@vc.net (2); Date: Thu, 9 Aug 2001 06:27:49 -0700; // VHF parasitic oscillation is always unloaded due to the tank circuit's low-pass nature. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/F; /archives//html/Amps/2001-08/msg00109.html (10,315 bytes)

Current List: 1 - 20
Page: [1] [2]