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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+4CX250\s+MSDS\s+SHEET\s*$/: 9 ]

Total 9 documents matching your query.

1. [Amps] 4CX250 MSDS SHEET (score: 1)
Author: mike kendall <ke6cvh@yahoo.com>
Date: Tue, 11 Dec 2007 02:26:25 -0800 (PST)
Hello, We have a piece of equipment at work with quite a few 4CX250M (Mobile version that is more rugged than the 4CX250R) tubes in the equipment. I was asked if the ceramic portion of the tube is be
/archives//html/Amps/2007-12/msg00129.html (6,734 bytes)

2. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 11 Dec 2007 09:24:33 -0500
It is not that deadly substance that gets some people all upset! If the tubes are any good send them this way. Carl KM1H _______________________________________________ Amps mailing list Amps@contest
/archives//html/Amps/2007-12/msg00131.html (7,811 bytes)

3. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: mike kendall <ke6cvh@yahoo.com>
Date: Wed, 12 Dec 2007 01:13:57 -0800 (PST)
Pete, The only tubes I have seen with pink ceramic is the russian ones that I've bought off of Ebay and from friends. I have to wonder if the russian ones have BeO? 73, Mike Isn't BeO ceramic pink? 7
/archives//html/Amps/2007-12/msg00138.html (8,402 bytes)

4. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 12 Dec 2007 10:51:29 +0000
"Pink BeO ceramic" is an urban legend. From http://www.svetlana.com/docs/tubeFAQ.html [CAPITALS added for emphasis]: "Q. Why is your ceramic pink? A. Svetlana ceramic power tubes are manufactured wit
/archives//html/Amps/2007-12/msg00139.html (11,108 bytes)

5. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: mike kendall <ke6cvh@yahoo.com>
Date: Wed, 12 Dec 2007 04:15:12 -0800 (PST)
Ian, They are not coaxial based and have pins, I was typing from memory and they are 4CX250BM. They go to an HF amplifier group made by Marconi (7amp groups mean 280 of the tubes or 40 per amp group
/archives//html/Amps/2007-12/msg00140.html (12,778 bytes)

6. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: Karl-Arne Markstr&ouml;m <sm0aom@telia.com>
Date: Wed, 12 Dec 2007 13:34:52 +0100 (CET)
Years ago, I contacted CPI/Eimac about the possible use of BeO in ordinary power tubes, and got the answer that the external anode/air cooled types did not use BeO in their construction. The only cur
/archives//html/Amps/2007-12/msg00141.html (13,978 bytes)

7. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Date: Wed, 12 Dec 2007 13:19:44 +0000
Yes, that all fits together - the 4CX250B"M-for-Marconi". Mike, you probably have all the evidence you need to tear up the beryllium emergency procedure. If the Navy wants more, then call Eimac. 73 f
/archives//html/Amps/2007-12/msg00142.html (14,682 bytes)

8. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: "Gary Smith" <Gary@doctorgary.net>
Date: Wed, 12 Dec 2007 09:47:50 -0500
I've got a beautiful 6166a/7007 RCA Pull which must weigh 8-10 pounds that has pink ceramic. A mere 12,000 watts for 95W drive; grid driven. Definitely pink... Gary KA1J _____________________________
/archives//html/Amps/2007-12/msg00143.html (10,084 bytes)

9. Re: [Amps] 4CX250 MSDS SHEET (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 12 Dec 2007 10:03:52 -0500
No No No. The ceramic is an INSULATOR., berillium oxide is a heat CONDUCTOR. Imagine the results if the anode heat was placed on the screen ring. RCA used pink ceramic in the 60's on hi power tetrode
/archives//html/Amps/2007-12/msg00144.html (10,380 bytes)

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