[AMRadio] TUBE RATINGS

[Bernie Doran]

Here is a great idea. I just checked the ratings for a 4PR1000A. It says I 
can run 20,000 v at 1.95 Amperes  with a 12 % duty cycle.    Guess that 
means if I only transmit for 2 hours per day, I am fine.  and if there is a 
contest and I do not operate for a week prior------    now that probably 
would only apply to SSB so for AM I would cut that back a bit to perhaps 
10KV at 1.0 AMP.  Anyone have a 10 Kw mod transformer? I already have two 
4PR1000As.   Of course if I turn it upside down in a tub of transformer oil 
then I could probably run it harder.    Those ratings are for CCS ( what 
ever that means) so for ham use it could probably go higher, maybe 30,000 at 
2 amperes would be ok. I remember when some hams? would run 6AG7s upside 
down in water with 1200 volts on them and about 1 kw in with 8  tubes.  they 
conduct better upside down because the electrons have mass(?) and fall 
toward the plates faster.   The best part of this scheme is that after 
running a while you can turn off the filament, (guess you have to cut the 
tube open and put switches in) and they still conduct great.

I watched some line men work on a 300,000 volt line a while back, so I 
suppose working on 2,000- 3,000 volts would be completely safe and be no 
danger other that a slight tingle if I touch it.  On of my good buddies( mad 
dog on free band) said he never uses a chicken stick or volt meter because 
he likes to wake up to the tingle of 4,000 V.    I have been nipped by 
15,000 on spark plugs and that did no harm just makes you jump a bit. 
Anyone know what a chicken stick is?  Must be a piece of wood that you use 
to beat on the roosters when they jump at you.

Have to run now the wife just said the porch fell off and killed three dogs 
and four hogs that were sleeping under it.  Good thing the goats came in the 
house last night!!  see you all on free band.               Bernie  P.S  Do 
they still put the license in the raison bran boxes?