Wide open, does that mean class C SSB?
73
Bill wa4lav
At 03:10 PM 10/12/2004 -0400, craxd wrote:
Bill,
That amp, which really said was an amateur amp, was mostly sold to the 11
meter folks. The larger the numbers, the more they sold it for. I've seen
it's schematic listed now on several amateur sites, less the text
portions. Some were built however, with a band switch. Actually, that was
supposed to be 600 PEP, which is way over what it should be. The ones I've
actually had my hands on did about 450-500, but that was wide open. I
wouldn't run it that way very long. Cut back to where it should be, it
will run ok. I just dont like the screen and bias circuit in it that well.
This can be changed though in a homebrew amp anyhow.
Bill Fuqua wrote:
The manual claims that a single 4CX250B will produce 600 watts peak
output. It has unregulated bias supplies as well.
I wonder if that is figuring peak voltage squared divided by resistance
rather than PEP value.
73
Bill wa4lav
At 12:12 PM 10/12/2004 -0400, craxd wrote:
Ken,
If six meters is all your wanting, no higher, I'd take a look at the way
the old Pride amplifier was made. The schematic for it is all over the
net. The input and output tank will need to be changed for six meters
but the circuit is almost the same. Pride made two models of this (both
the same), I think one was called KW-One and the other a 300 if I
recall. It dont have the best regulation for the screen and G1 bias, but
it did work up to 10 meters using one 4CX250B.
http://cbtricks.com/Amp/pride/index.htm
Will Matney
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