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Total 17 documents matching your query.

1. [AMPS] Finally - a real amp (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Fri, 11 Jun 1999 08:56:08 -0400; This is a multi-part message in MIME format. --=_NextPart_000_00DD_01BEB3E8.3F3253C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have at long last obt; /archives//html/Amps/1999-06/msg00378.html (11,541 bytes)
2. [AMPS] Finally - a real amp (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 11 Jun 1999 06:41:23 -0700; ? Eimac rates the 3-500Z at 400mA max. for linear service and 65w drive. My advice is to believe it. The 550mA figure may have come from one of our recognized "experts". 200mA of Ig is within the Ei; /archives//html/Amps/1999-06/msg00382.html (9,657 bytes)
3. [AMPS] Finally - a real amp (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Fri, 11 Jun 1999 09:54:58 -0400; Rich, That seems quite a bit less than what the manual suggests. However, the reduced power would hardly be noticable to anyone. I wonder what the affects of SSB would be rather than full carrier. If; /archives//html/Amps/1999-06/msg00383.html (11,459 bytes)
4. [AMPS] Finally - a real amp (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 11 Jun 1999 07:29:59 -0700; ? I have heard an AL80 driven by 100W. The splatter was noticeable to everyone in the vicinity. ? No additional stress on tube. Additional stress on stations trying to communicate on adjacent freque; /archives//html/Amps/1999-06/msg00385.html (10,315 bytes)
5. [AMPS] Finally - a real amp (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 11 Jun 1999 07:32:18 -0700; The single 3-500Z can be tuned and loaded to 550ma single tone (CW) for a very short period in order to establish the correct operating conditions for the peak of the SSB signal. It should then be dr; /archives//html/Amps/1999-06/msg00386.html (9,992 bytes)
6. [AMPS] Finally - a real amp (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Fri, 11 Jun 1999 11:02:01 -0400; Well, I opened up the AL-80A to see what had happened. I was stunned. I expected to find a fried plate RF choke as Vic suggested. Instead, when I removed the 3-500z, I first noticed the top inside su; /archives//html/Amps/1999-06/msg00388.html (12,136 bytes)
7. [AMPS] Finally - a real amp (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 11 Jun 1999 10:09:40 -0700; Doug -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.; /archives//html/Amps/1999-06/msg00392.html (8,993 bytes)
8. [AMPS] Finally - a real amp (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Fri, 11 Jun 1999 12:53:19 -0400; and current That's too much plate and grid current. About how long was the amp key-down before the bang occured? had discovery laser. I'd be interested in hearing the group's theories on exactly wha; /archives//html/Amps/1999-06/msg00395.html (10,528 bytes)
9. [AMPS] Finally - a real amp (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Fri, 11 Jun 1999 14:12:11 -0400; Hi Dick, Thanks for your response. I was tuning the amp on and off about 10 seconds at a time. It seemed to tune up fine - then bang and no ip or ig on the meter. The crazy part is, you would think w; /archives//html/Amps/1999-06/msg00396.html (12,463 bytes)
10. [AMPS] Finally - a real amp (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 11 Jun 1999 11:51:56 -0700; ? Semi-agreed. However, under full drive, the grid/cathode potential is typically110v-peak, or 78V-rms. Grid dissipation is approx. 0.15a x 78v = 11.7w. The rated grid-dissipation is 20w. Rich... R.; /archives//html/Amps/1999-06/msg00397.html (9,304 bytes)
11. [AMPS] Finally - a real amp (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Fri, 11 Jun 1999 20:53:58 +0200; Try using an old glass type 2C39 in a cavity amp for 23cms and you get similar results when pushed hard. A nice clean hole with no apparent other damage. John ZS5JF -- To: <amps@contesting.com> -- FA; /archives//html/Amps/1999-06/msg00398.html (13,388 bytes)
12. [AMPS] Finally - a real amp (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Fri, 11 Jun 1999 17:50:52 -0400; ? Semi-agreed. However, under full drive, the grid/cathode potential is typically110v-peak, or 78V-rms. Grid dissipation is approx. 0.15a x 78v = 11.7w. The rated grid-dissipation is 20w. What part d; /archives//html/Amps/1999-06/msg00400.html (9,457 bytes)
13. [AMPS] Finally - a real amp (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 11 Jun 1999 15:48:12 -0700; ? anode/plate current exceeded the manufacturer's limit. ? An approx. value. Depends on anode supply potential. ? I have run a 3-500z grid so hot it glowed, and no damage was done. With no gold plat; /archives//html/Amps/1999-06/msg00401.html (9,735 bytes)
14. [AMPS] Finally - a real amp (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Fri, 11 Jun 1999 19:01:13 -0400; It would seem to me that the operating parameters at the time of the failure do not explain the cause. ip was only 150 and ip about 500. Total key-down duration was no more than 20 seconds. This does; /archives//html/Amps/1999-06/msg00402.html (10,748 bytes)
15. [AMPS] Finally - a real amp (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Fri, 11 Jun 1999 19:02:57 -0400; I will certainly detail my experience. Hopefully, I will not repeat the failure. I am replacing the Plate RF coke with the current one for the AL-80B. Doug with had discovery laser. I order their the; /archives//html/Amps/1999-06/msg00403.html (14,559 bytes)
16. [AMPS] Finally - a real amp (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 11 Jun 1999 22:42:16 -0700; Reduce VHF amplification by reducing VHF Q. . Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com; /archives//html/Amps/1999-06/msg00406.html (11,699 bytes)
17. [AMPS] Finally - a real amp (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 14 Jun 1999 10:32:54 +0100; I've been hamming for about the same length of time, as well as doing radio professionally - I'm old enough to have designed tube transmitters for production - and I've seen this effect twice. Once w; /archives//html/Amps/1999-06/msg00420.html (8,993 bytes)

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