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1. [Amps] Capacitor and Alpha 374 question (score: 1): Author: Ted <K8AQM1629T@comcast.net>; Date: Fri, 19 Aug 2016 13:05:20 -0400; I have a three tube Alpha 374, it has an oil-filled capacitor rated at 40pf/5KV. After running awhile in cw an AC hum occurs on my signal. I am thinking that after heating up this old oil-filled capa; /archives//html/Amps/2016-08/msg00044.html (7,354 bytes)
2. Re: [Amps] Capacitor and Alpha 374 question (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Sat, 20 Aug 2016 15:25:20 -0400; a capacitor replacement kit from "Tube Meister." The add says it is for Alpha/76/78/374." Looks like you've moved ahead but Condenser Products in Brooksville, FL is still making the same replacement; /archives//html/Amps/2016-08/msg00046.html (7,369 bytes)
3. Re: [Amps] Capacitor and Alpha 374 question (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Sat, 20 Aug 2016 17:45:42 -0400; Hi Paul W9AC Christensen: /* snip */ I ordered one last week (P/N MOC5M35ES) for an Alpha PA-70A that was manufactured in 1970 (S/N 002). The new cap is 35uF/5KV and fits inside the 70A, 70V, 77, 77D; /archives//html/Amps/2016-08/msg00047.html (8,507 bytes)
4. [Amps] Capacitor and Alpha 374 question (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Sun, 21 Aug 2016 05:36:52 -0500; Run the amplifier until you hear the hum then shoot a temperature of the cap with an IR thermometer. Take the cap temp. when at room temperature first. The temperature shouldn't rise much if any. If; /archives//html/Amps/2016-08/msg00055.html (8,923 bytes)
5. Re: [Amps] Capacitor and Alpha 374 question (score: 1): Author: Roger <ai7rogerroger@gmail.com>; Date: Sun, 21 Aug 2016 07:25:21 -0700; I find it strange that the op specified the suspect capacitor as "40pf" / 5kv. Either this is a slip of the fingers on the keyboard , most likely, or something is sorely out of place. 73, Roger W7TZ; /archives//html/Amps/2016-08/msg00057.html (10,190 bytes)
6. Re: [Amps] Capacitor and Alpha 374 question (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Sun, 21 Aug 2016 11:06:32 -0400; 5kv." The ETO 374 schematic indicates that C24, the PS oil cap is 30 uF/2.5KV. Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin; /archives//html/Amps/2016-08/msg00059.html (7,430 bytes)
7. [Amps] Capacitor and Alpha 374 question (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Sun, 21 Aug 2016 09:51:02 -0700; I have a three tube Alpha 374, it has an oil-filled capacitor rated at 40pf/5KV. After running awhile in cw an AC hum occurs on my signal. I am thinking that after heating up this old oil-filled capa; /archives//html/Amps/2016-08/msg00063.html (9,223 bytes)
8. [Amps] Capacitor and Alpha 374 question (score: 1): Author: Ted <k8aqm1629t@comcast.net>; Date: Sun, 21 Aug 2016 13:35:25 -0400; Thanks to all who saw the pf vs uf issue. As Paul Harvey use say, "Here is the rest of the story...." You're right the pf was caught by five others....BUT....not my fault! Note in the picture of the; /archives//html/Amps/2016-08/msg00066.html (13,463 bytes)

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