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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+help\s+with\s+corona\s+discharge\s*$/: 14 ]

Total 14 documents matching your query.

1. [Amps] help with corona discharge (score: 1)
Author: Steve Hanlon <asciibaron@comcast.net>
Date: Tue, 11 Nov 2008 18:38:33 -0500
i am seeing a corona discharge around both tubes in an amp - the blue glow is visible if you look down through the cooling fins - the tubes are 3cx800's. any ideas on what would cause this? the coron
/archives//html/Amps/2008-11/msg00117.html (6,633 bytes)

2. Re: [Amps] help with corona discharge (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Tue, 11 Nov 2008 19:53:20 -0500
Pull the tubes and run them thru the dishwasher to remove any contaminants on the ceramic. You may also see a buildup on the chimneys. Carl KM1H _______________________________________________ Amps m
/archives//html/Amps/2008-11/msg00119.html (7,960 bytes)

3. Re: [Amps] help with corona discharge (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Wed, 12 Nov 2008 07:25:26 -0800
"i am seeing a corona discharge around both tubes in an amp - the blue glow is visible if you look down through the cooling fins" Are you, by chance, operating at 20,000 feet? K7FM __________________
/archives//html/Amps/2008-11/msg00123.html (7,495 bytes)

4. Re: [Amps] help with corona discharge (score: 1)
Author: Steven Hanlon <asciibaron@comcast.net>
Date: Wed, 12 Nov 2008 15:28:31 +0000 (UTC)
nope, about 160 or so. -Steve, WM3O _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2008-11/msg00124.html (7,317 bytes)

5. Re: [Amps] help with corona discharge (score: 1)
Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>
Date: Wed, 12 Nov 2008 11:55:26 -0500
Every Commander amp that I have added QSK and vacuum relays to has had the blue glow when looking through the cooling fins.. The three holer on my desk, with brand new 3cpx800 tubes, glows blue. The
/archives//html/Amps/2008-11/msg00128.html (8,424 bytes)

6. Re: [Amps] help with corona discharge (score: 1)
Author: k8mlm@aol.com
Date: Wed, 12 Nov 2008 12:28:36 -0500
Concur.? 4CX250s also glow blue. Bob K8MLM Every Commander amp that I have added QSK and vacuum relays to has had the blue glow when looking through the cooling fins.. The three holer on my desk, wit
/archives//html/Amps/2008-11/msg00129.html (9,411 bytes)

7. Re: [Amps] help with corona discharge (score: 1)
Author: Pat Barthelow <aa6eg@hotmail.com>
Date: Wed, 12 Nov 2008 09:39:37 -0800
I first interpreted the comment on the blue glow observation, as meaning the glow is in the air out side the tube body, but now realize that what you are probably seeing is Cerenkov radiation generat
/archives//html/Amps/2008-11/msg00131.html (10,779 bytes)

8. Re: [Amps] help with corona discharge (score: 1)
Author: "David H Craig" <n3db@radix.net>
Date: Wed, 12 Nov 2008 13:15:29 -0500
FWIW http://glow.gs35b.com/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2008-11/msg00133.html (12,059 bytes)

9. Re: [Amps] help with corona discharge (score: 1)
Author: "Gary Smith" <Gary@doctorgary.net>
Date: Wed, 12 Nov 2008 18:47:40 -0500
I personally miss the tube glow from the first amp I built. It had that beautiful 4PR1000A with 6KV on the plate. That glow was a thing of beauty. Gary KA1J __________________________________________
/archives//html/Amps/2008-11/msg00140.html (8,626 bytes)

10. Re: [Amps] help with corona discharge (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Wed, 12 Nov 2008 19:00:02 -0500
My first big amp was PP 250TH's in 1957. I had them a bright orange a few times. Went to the 4 x 1's a decade later when freebie BCB pulls were everywhere around here, built my last one in the late 8
/archives//html/Amps/2008-11/msg00141.html (9,905 bytes)

11. Re: [Amps] help with corona discharge (score: 1)
Author: "Gary Smith" <Gary@doctorgary.net>
Date: Wed, 12 Nov 2008 20:03:25 -0500
Heh, I still have a few 250TH and have a 750TH in good shape & one that looks as new but has a popped filament. Never did use either of them. That 750TH is a monster. Gary KA1J ______________________
/archives//html/Amps/2008-11/msg00142.html (11,124 bytes)

12. Re: [Amps] help with corona discharge (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Wed, 12 Nov 2008 20:37:21 -0500
The biggest bottles I ever saw were in a surplused Navy shore station rig at the NAS Olathe K0NAB ham club station. PP 2000T's with 1500T's as modulators. We usually used a 32V1 to drive a modified B
/archives//html/Amps/2008-11/msg00143.html (12,296 bytes)

13. Re: [Amps] help with corona discharge (score: 1)
Author: "Paul Kraemer" <elespe@lisco.com>
Date: Wed, 12 Nov 2008 19:40:46 -0600
My first big rig was pair of 833A, big ugly bottles that really put out when they were a glowin orange K0UYA -- Original Message -- From: "Gary Smith" <Gary@doctorgary.net> To: <amps@contesting.com>
/archives//html/Amps/2008-11/msg00144.html (11,635 bytes)

14. Re: [Amps] help with corona discharge (score: 1)
Author: "Roger (K8RI)" <sub1@rogerhalstead.com>
Date: Wed, 12 Nov 2008 23:36:34 -0500
Mine was a 6C21 with a passive grid. On the first tube I said "Hello Test" and blew the plate right out of it. Of course they were only $5 each back then. Even with all those resistors on the grid I
/archives//html/Amps/2008-11/msg00145.html (9,618 bytes)

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