- 1. [Amps] 4CX300a Seal Leaks (score: 1)
- Author: "John Finner" <finnerjf@worldnet.att.net>
- Date: Fri, 15 Jan 2010 21:08:42 -0500
- I read a post by Carl, KM1H on August 10, 2009 that read: There are several ceramic tubes that are notorious for seal leakage. The 4CX300A is a classic. This post is directed to Carl. The list might
- /archives//html/Amps/2010-01/msg00215.html (6,864 bytes)
- 2. Re: [Amps] 4CX300a Seal Leaks (score: 1)
- Author: texasrf@aol.com
- Date: Fri, 15 Jan 2010 22:00:42 EST
- John, this where you pull out your trusty hv leakage tester and check for leakage between the anode and screen grid. If there is onset of leakage at a voltage of 1000vdc or so, there is a very high l
- /archives//html/Amps/2010-01/msg00216.html (8,944 bytes)
- 3. Re: [Amps] 4CX300a Seal Leaks (score: 1)
- Author: "Carl" <km1h@jeremy.mv.com>
- Date: Sat, 16 Jan 2010 09:09:07 -0500
- Ive no idea if any date code could be considered good or bad John. My only experience with them was in a couple of HT-33's that were in for service decades ago and then I was told the reason for prem
- /archives//html/Amps/2010-01/msg00218.html (8,701 bytes)
- 4. Re: [Amps] 4CX300a Seal Leaks (score: 1)
- Author: "John Finner" <finnerjf@worldnet.att.net>
- Date: Sat, 16 Jan 2010 12:15:11 -0500
- Thanks Gerald. I did not think of hipotting them. I have both a 5200 V supply that I can variac control and a Tripplet 630 for indicating leakage. I will be safe with the high voltage as I learned my
- /archives//html/Amps/2010-01/msg00219.html (10,173 bytes)
- 5. Re: [Amps] 4CX300a Seal Leaks (score: 1)
- Author: "John Finner" <finnerjf@worldnet.att.net>
- Date: Sat, 16 Jan 2010 12:24:58 -0500
- Thanks Carl. I will take Geralds advice as I have both a 5200 V supply and a Tripplet 630. I received the tubes from a Navy MARS friend quite a while back who had big ideas for them and no sockets. I
- /archives//html/Amps/2010-01/msg00220.html (9,992 bytes)
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