David J Windisch wrote:

The point is, that I don't know what the nomenclature is, and asked for help
with it in the OP.

"Someone" mentioned this tube in a post "somewhere" several years ago. I've
searched archives for faulty-memory-recollections of the nomenclature, to no
avail.

For latecomer Noeding: I'd like to get enough of them to experiment with
no-tune techniques, which might be practical with plate voltage around 600
and plate current of 4 or 5 amps. The "hilarious" comment referred to plain
old thread-wander ;o)

73, Dave, N3HE

"J M Noeding" wrote in message
...

On 19 Jul 2004 15:38:46 -0700, (Mike Silva)
wrote:


"David J Windisch" wrote in message

...

This is hilarious. The OP asked a question. And asks it again:

What's the nomenclature for that sweep tube, produced just for

Admiral TVs

years ago, that's heavier-duty than any of the other tubes?

I thought it was 6MJ6 -- but, no. It has an *octal* base.

So what kind of base does your mystery tube have?

Ah, nevermind. I see now that the "it" in your question is not the
6MJ6, but your mystery tube...

perhaps it is just a silly request when he has nothing else to talk
about, it might be 6JS6, 6KD6, or perhaps it was 6JM6.... and
6JM6 GE Vacuum Radio Tubes is offered on internet and the
Current Price: $0.99

so, when 100 persons have commented, it might be a better idea to read
the type number on the glass again and tell us which type the question
was about???


http://home.online.no/~la8ak/e81.htm
---
J. M. Noeding, LA8AK, N-4623 Kristiansand
http://home.online.no/~la8ak/c.htm



It may be best to pick the least expensive "big" sweep tube for which
you have specs, and parallel enough of them to get the impedance where
you want it to be.

You should also be able to run the voltage down a bit at the tube's
rated current. This will reduce your power output but it'll reduce your
impedance at the same time.

If you use a 3:1 step-down on your output you'll load the plate with 450
ohms. This will require a 1.3A peak current with a 600V plate supply,
and should be good for 300W or more PEP output -- may be easier to start
there than at 5A!

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com