[Amps] mounting 3CX3000A7 Horizontally
Bill Fuqua
wlfuqu00 at uky.edu
Wed Dec 1 12:12:13 EST 2004
OOPS,,,, I should have waited until I got into some bright light and opened
the Plasma generator up.
I was looking thru a grill in the back of this thing in a dark warehouse at
the time. The tube appeared much larger than it was.
It is a 4CX1000 or 1500.
The EIMAC tube number was removed but I am sure that is what it is. And it
is grid driven by a single miniature
tube on a plug-in circuit board ( obviously the amp is neutralized) which
appears to be a crystal oscillator.
So it seems that this will be the perfect qrp to qro amplifier. And the
tube is mounted horizontally which is just fine.
It has a nice vacuum variable in the tank circuit and one of those National
RF chokes various sizes of coils on it.
I think I'll see what I can do with this one. It has a heck of a
large plate transformer in it.
This is an improvement over the smaller IPC plasma generators that used 4
parallel 8072 with finned heat sinks attached.
Everyone of those I have gotten has had fried tubes and burnt sockets in it.
You know, I could just use my HG10B VFO and make a neat 20 Meter CW
transmitter.
73
Bill wa4lav
More information about the Amps
mailing list