[AMPS] AL-1500, AL-82, AL-1200, QRO???

Amps

[AMPS] AL-1500, AL-82, AL-1200, QRO???

from [ <g4piq@btinternet.com (Andy Cook, G4PIQ)]

To:	<amps@contesting.com>
Subject:	[AMPS] AL-1500, AL-82, AL-1200, QRO???
From:	g4piq@btinternet.com" <g4piq@btinternet.com (Andy Cook, G4PIQ)
Date:	Tue, 16 Jan 2001 12:11:10 -0000

Rich wrote :

>> The 3cx1200A7 is virtually immune to grid/fil. shorts.  3-500Zs are not. 

I'd just like to counter that by saying that in 15 years of looking after 
the amps for our multi-multi contest group the ONLY fatal tube failures 
which I have seen have been 2 grid-filament shorts in 3CX1200A7s. I've 
probably been through 30 amps with various tubes in including

3CX800s with and without grid current trips (Alphas, Amp Supplies, K1FOs at 
VHF and many Ten Tec Titans),
3-500Zs (TL922, Amp Supplies, Tokyo Hi Power)
4CX800s (Alphas)
8874 / 8877 (Henrys)
4CX250Bs (home brew, Tokyo High Power)
and a bunch of other similar stuff.

Just my experience, but they are most definitely not imune to that problem.

Andy Cook, G4PIQ





--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
[AMPS] AL-1500, AL-82, AL-1200, QRO???, Chuck Adkins - K8CPA [AMPS] AL-1500, AL-82, AL-1200, QRO???, <W4EF@dellroy.com (Michael Tope) [AMPS] AL-1500, AL-82, AL-1200, QRO???, Phillip Johnson [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, Bill Turner, W7TI [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, <AccessIT@Bigpond.net.au (Noel Willis @ Access IT) [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, <g4piq@btinternet.com (Andy Cook, G4PIQ) <= [AMPS] AL-1500, AL-82, AL-1200, QRO???, Tom Rauch [AMPS] AL-1500, AL-82, AL-1200, QRO???, Bill Turner, W7TI [AMPS] AL-1500, AL-82, AL-1200, QRO???, Bob Duckworth [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, <g4piq@btinternet.com (Andy Cook, G4PIQ) [AMPS] AL-1500, AL-82, AL-1200, QRO???, measures [AMPS] AL-1500, AL-82, AL-1200, QRO???, <g4piq@btinternet.com (Andy Cook, G4PIQ) [AMPS] AL-1500, AL-82, AL-1200, QRO???, <g3sek@ifwtech.com (Ian White, G3SEK)

Previous by Date:	[AMPS] receivers, Peter Chadwick
Next by Date:	[AMPS] AL-1500, AL-82, AL-1200, QRO???, Bob Duckworth
Previous by Thread:	[AMPS] AL-1500, AL-82, AL-1200, QRO???, measures
Next by Thread:	[AMPS] AL-1500, AL-82, AL-1200, QRO???, Tom Rauch
Indexes:	[Date] [Thread] [Top] [All Lists]