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1. [Amps] 4-250A testing (score: 1): Author: "Randy S." <rj3819@yahoo.com>; Date: Mon, 27 Sep 2010 13:10:59 -0700 (PDT); This tube is on ebay .. Worried about getting an older gassy tube . The seller states .. This auction is for One 4-250 / 5D22 Transmitting Tube. The labeling on this tube has been worn other than the; /archives//html/Amps/2010-09/msg00331.html (7,902 bytes)
2. Re: [Amps] 4-250A testing (score: 1): Author: TexasRF@aol.com; Date: Mon, 27 Sep 2010 16:32:39 EDT; To test for emission, it would seem that the grid voltage would need to be zero or even positive to simulate the effect of the peak driving voltage. If the emission is normal this would cause a very; /archives//html/Amps/2010-09/msg00332.html (9,477 bytes)
3. Re: [Amps] 4-250A testing (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 27 Sep 2010 16:52:24 -0400; The tube has a 5V @ 14.5A filament so Im not sure what you mean by 6.3V @ 8A? The only difference between it and a 4-400 is the added fins on the anode Carl KM1H _____________________________________; /archives//html/Amps/2010-09/msg00333.html (10,880 bytes)
4. Re: [Amps] 4-250A testing (score: 1): Author: "la7sl Nils Petter" <la7sl@norgespost.no>; Date: Mon, 27 Sep 2010 23:37:29 +0200; He was referring to the sellers own description on how the tube was tested... He asked if this seemed OK. That is how I understand the question. The answer is : This is definitely not ok ! 6.3V 8 amp; /archives//html/Amps/2010-09/msg00334.html (11,989 bytes)
5. Re: [Amps] 4-250A testing (score: 1): Author: "Randy S." <rj3819@yahoo.com>; Date: Mon, 27 Sep 2010 16:58:57 -0700 (PDT); Yes .. the ebay'er was testing it that way .. Thanks for all the inputs .. Missed that filament voltage .. :( Thats bad .. I think I'll leave it be .. Nice info on the tube being the same except for; /archives//html/Amps/2010-09/msg00336.html (7,182 bytes)
6. Re: [Amps] 4-250A testing (score: 1): Author: "Barrie Smith" <barrie@centric.net>; Date: Mon, 27 Sep 2010 18:56:33 -0600; Carl: I've often wondered if the finned anodes had greater plate dissapation than the anodes without fins. I have a variety of old Eimac glass tubes here, some with finned anodes, and some without. A; /archives//html/Amps/2010-09/msg00337.html (13,020 bytes)

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