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Total 80 documents matching your query.

21. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: RMcGraw@InfoAve.Net (Bob & Linda McGraw K4TAX); Date: Fri, 02 Feb 2001 12:58:10 -0800; One popular HF amp today (I own one) is designed so that when one flips the power switch the fil, fan and HV all come on. There is no CW/SSB switch as on some of the older amps. i.e. SB-220 and Drake; /archives//html/Amps/2001-02/msg00070.html (11,042 bytes)
22. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: da_kang@hotmail.com (Jeff Wolf); Date: Fri, 02 Feb 2001 19:04:13; Although I agree, what would you rather have them see, higher or lower R? I would tend to think that the higher R of the primary in CW position (meaning, more turns) would lead to less of a drain on; /archives//html/Amps/2001-02/msg00072.html (9,679 bytes)
23. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: da_kang@hotmail.com (Jeff Wolf); Date: Fri, 02 Feb 2001 19:06:37; Mauri, I do recognize the overall gain does increase, but the efficiency does not. I draw less mains power to get 500 watts of output on my SB220 on CW position than I do on the higher SSB position,; /archives//html/Amps/2001-02/msg00073.html (9,735 bytes)
24. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: kb7ww@chatusa.com (KB7WW Art Moe); Date: Fri, 02 Feb 2001 11:06:41 -0800; Eimac recommends 3 min for bringing the heater/cathode up to temp, don't they??? Art KB7WW -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests:; /archives//html/Amps/2001-02/msg00074.html (9,643 bytes)
25. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: da_kang@hotmail.com (Jeff Wolf); Date: Fri, 02 Feb 2001 19:37:19; Mauri, I do recognize the overall gain does increase, but the efficiency does not. I draw less mains power to get 500 watts of output on my SB220 on CW position than I do on the higher SSB position,; /archives//html/Amps/2001-02/msg00075.html (9,638 bytes)
26. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: da_kang@hotmail.com (Jeff Wolf); Date: Fri, 02 Feb 2001 20:57:30; Now, my 8877 on 144 MHz is a different animal. It takes a full 1 min for the heaters to get the cathode up to operating temp. Here, it's smart to wait til the thing warms up. Eimac recommends 180 sec; /archives//html/Amps/2001-02/msg00076.html (9,380 bytes)
27. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: ea6nb@wanadoo.es (Jaime P.Ullívarri); Date: Sat, 3 Feb 2001 04:27:19 -0000; This is a good idea, but where to find a 100K, pull on / push off / potentiometer ? I have seen them in some Heathkits kits but not in Spain. 73, Jaime EA6NB. *--Mensaje original-- *De: owner-amps@co; /archives//html/Amps/2001-02/msg00077.html (10,383 bytes)
28. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: 2@vc.net (measures); Date: Fri, 2 Feb 2001 22:56:01 -0800; The on/off switch passes more current when the 220 (or 922) is started on the SSB position instead of the CW position. However, either CW or SSB switch position on startup will eventually result in; /archives//html/Amps/2001-02/msg00078.html (9,704 bytes)
29. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: 2@vc.net (measures); Date: Fri, 2 Feb 2001 22:56:00 -0800; 1 minute is way short of the recommended warm-up time. . - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Admin; /archives//html/Amps/2001-02/msg00079.html (9,694 bytes)
30. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: apollo_six@btinternet.com (paul); Date: Sat, 3 Feb 2001 08:29:26 +0000; AB Electronics in South Wales UK will make and supply one to your exact requirements - they're on the web! Paul -- To try and not succeed is better than not to try at all (Anon) -- FAQ on WWW: http:/; /archives//html/Amps/2001-02/msg00081.html (11,511 bytes)
31. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: Wt8r@aol.com (Wt8r@aol.com); Date: Sat, 3 Feb 2001 10:24:19 EST; Eimac actually recommends 5 minutes. Dave, WT8R -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner; /archives//html/Amps/2001-02/msg00082.html (10,087 bytes)
32. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: RMcGraw@InfoAve.Net (Bob & Linda McGraw K4TAX); Date: Sat, 03 Feb 2001 16:50:25 -0800; Art: Thanks for the info and the references. Interestingly enough of the 8 or so responses I've received, there seems to be a wide variance, according to the respondees, as to what EIMAC specs as the; /archives//html/Amps/2001-02/msg00092.html (10,294 bytes)
33. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 3 Feb 2001 19:47:45 -0600; The limitation is no RF for 3 minutes on a 8877. All of Alpha's 8877 amps apply H.V. @ turn-on. The 3 minute timer is in the key-line. Cathode damage will take place if the above limitation is not h; /archives//html/Amps/2001-02/msg00098.html (10,006 bytes)
34. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 4 Feb 2001 09:32:20 +0000; The Eimac data sheet says "180 seconds minimum". The exact warmup time is a judgement call, even by Eimac. If you connect a high-resolution DVM across the heater, it acts as its own resistance thermo; /archives//html/Amps/2001-02/msg00099.html (12,943 bytes)
35. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 4 Feb 2001 10:38:25 -0600; I too will miss the E-Mails from Bill and the benefit of his vast experience. Luckily, most of it has been written down...what a great legacy for future generations! As I see the passing of the WW I; /archives//html/Amps/2001-02/msg00102.html (10,209 bytes)
36. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 5 Feb 2001 11:15:57 -0000; I feel that this applies to more than the SB220, and is desirable on any amplifier above the 500 watt or so level. Having said that, the cost when you're building a commercial amplifier has to be con; /archives//html/Amps/2001-02/msg00107.html (9,653 bytes)
37. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: 2@vc.net (measures); Date: Mon, 5 Feb 2001 05:18:31 -0800; obviously Appliance rocker switches come in two flavors. 1. for resistive loads and 2. for surge current loads. I have some 15A rocker switches that are rated at 43A surge. Good engineering is often; /archives//html/Amps/2001-02/msg00108.html (10,000 bytes)
38. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 5 Feb 2001 13:24:46 -0000; You know that. I know that. Probably everyone here knows that. Now convince the bean counters who generally have more say about what goes on in industry........oh, and the 'pointy haired bosses ' too; /archives//html/Amps/2001-02/msg00109.html (11,354 bytes)
39. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Mon, 05 Feb 2001 05:41:32 -0800; fisted....... That may be true Rich but most companies don't think long run. That is why planned obsolescence is the dominant mode in automobile manufacturing. For every Mercedes there are several Fo; /archives//html/Amps/2001-02/msg00111.html (9,454 bytes)
40. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: k7fm@teleport.com (Lamb); Date: Mon, 5 Feb 2001 06:18:38 -0800; "You know that. I know that. Probably everyone here knows that. Now convince the bean counters who generally have more say about what goes on in industry........oh, and the 'pointy haired bosses ' to; /archives//html/Amps/2001-02/msg00113.html (11,114 bytes)

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