- 1. [Amps] more dangers in our shack (score: 1)
- Author: "Nils Petter Pedersen" <la7sl@online.no>
- Date: Sat, 17 Nov 2007 21:47:51 +0100
- While I am at it... there are more dangers in our shack: Apart from the more obvious danger of electromagnetic overexposure using our 3cx 15 000's and the likes...:-) A lot of power tubes and other d
- /archives//html/Amps/2007-11/msg00233.html (7,611 bytes)
- 2. Re: [Amps] more dangers in our shack (score: 1)
- Author: Steve Thompson <g8gsq@eltac.co.uk>
- Date: Sat, 17 Nov 2007 22:09:32 +0000
- A lot? The only tube I know of which has BeO in its structure is used in the UK Clansman 353 tank radio. This has BeO between the anode and a conduction cooling mounting flange. CCS1 and 8873 use a B
- /archives//html/Amps/2007-11/msg00236.html (7,780 bytes)
- 3. Re: [Amps] more dangers in our shack (score: 1)
- Author: "Nils Petter Pedersen" <la7sl@online.no>
- Date: Sat, 17 Nov 2007 23:44:19 +0100
- Hi Steve ! Well... according to a red coloured note I found in the original Eimac box when ordering some 4CX250's many years ago,- those tubes contained BeO. According to that note the premises shoul
- /archives//html/Amps/2007-11/msg00238.html (9,673 bytes)
- 4. Re: [Amps] more dangers in our shack (score: 1)
- Author: "jeremy-ca" <km1h@jeremy.mv.com>
- Date: Sat, 17 Nov 2007 18:47:13 -0500
- Heath SB-230 and a Henry VHF amp come to mind that use the 8873. Also some Motorola VHF FM amps that use a conduction cooled 4CX250. And GE VHF/UHF repeaters using the 8072. I have also seen a fellow
- /archives//html/Amps/2007-11/msg00241.html (9,539 bytes)
- 5. Re: [Amps] more dangers in our shack (score: 1)
- Author: Steve Thompson <g8gsq@eltac.co.uk>
- Date: Sun, 18 Nov 2007 08:57:04 +0000
- Interesting. In the 4CX250s I've opened up, I don't recall seeing any ceramic in the grid support structures - but these would have been 60/70s date codes. As you say, maybe the original design was d
- /archives//html/Amps/2007-11/msg00244.html (7,591 bytes)
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