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1. [AMPS] Key down time (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Mon, 9 Mar 98 13:46:32 -0600; In regards to key down time on amplifiers: I believe any amplifier can run keyed down indefinitely given: 1.) Proper cooling of the tube to keep it within temp limits 2.) Heavy duty enough power supp; /archives//html/Amps/1998-03/msg00087.html (7,659 bytes)
2. [AMPS] Key down time (score: 1): Author: wrt@eskimo.com (Bill Turner, W7TI); Date: Tue, 10 Mar 1998 08:35:30 GMT; _______________________________________________________________ Actually, there's one more. Proper cooling of the tank coils. I had a well-known "legal limit" amplifier melt down the 80/160 meter tan; /archives//html/Amps/1998-03/msg00120.html (7,607 bytes)
3. [AMPS] Key down time (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Mon, 9 Mar 98 18:40:10 -0600; Ahh, good point! I forgot about that. Yes, those get rather warm too. As far as I am concerned, you can't have too much cooling on an amp! 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na "; /archives//html/Amps/1998-03/msg00121.html (7,405 bytes)
4. [AMPS] Key down time (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 9 Mar 98 16:47:31 -0800; 3) If an oxide-cathode tube is used, the key-down cathode current rating is not exceeded. For example, a 3cx800a7 can handle 800mA intermittently in SSB, but it is rated at 600mA in N-Ø-N/key; /archives//html/Amps/1998-03/msg00122.html (8,079 bytes)

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