[Amps] 3-500z substitutes

[jim.thom jim.thom@telus.net]

The 3CX-800A7 has a max anode V rating of just 2250 vdc.

The AL-80A/B has 3100 vdc no load on it....and 2750 vdc loaded.....so you
can scratch that tube off ur list. (3CX-800A7)

The 3CX800U7 has a max anode V rating of just 1800 vdc.  Scratch that tube
off your list.

3CX-400A7 has a max anode V rating of  2200 vdc. Scratch that tube as well.

3CX-400U7  rated for just  1500 vdc.  Scratch that tube.

GI46B  rated for a max of  2 kvdc.  scratch that tube.

I'm telling you, you are wasting your time.

Just rebuild the amp, power supply, and whatever else is wrong with
it.....and stuff a new 3-500Z into it....and be done with it.

CTR engineering also sells a real compact output TR relay board ( that's
correctly sequenced)..that has now been used successfully in a lot of
different amps.  Quiet..and fast.  Comes in 12/24/120 vdc versions.

https://www.ctrengineeringinc.com/relays/   $59.00

Jim  VE7RF