The 4CX250 amp looks like a CB amplifier Skipp.
>>>Actually, it looks like a Pride DX-300. A tuned input, 80 to 10 meter
>>>amateur radio amplifer. One of the cleanest amps I have seen come from a
>>>production environment. App 20 dB gain, clean, parasitic free,
>>>completely adjustable bias... Yep, seems like the average CB amplifier.
It certainly can't
be a very good amp for ham radio.
>>>Why not? Because it has high gain? If you don't want the gain, Pride
>>>made another (to compliment the FT 101 and similiar series of radios,
>>>called the KW-1 (1 Kw input). It used an untuned grid, just swamped with
>>>R. THAT seems more like a CB amplifier to me.
It takes 1-5 watts of drive, and worse yet has no screen regulation,
current limiting, or metering.
>>>People could say the same of the current amateur amplifiers that don't
>>>have parasitic suppressors, replace tubes an inordinate amount of times,
>>>and the such.
>>>The Pride amplifiers have metering jacks on the back. The front panel
>>>has nothing but a wattmeter. If you want metering, you have grid
>>>current, plate current and screen current metering on the front. The
>>>Pride also has a LED Screen current indicator on the front panel. I was
>>>leary of this at first, but after studing the schematic, I have found
>>>that it works quite well. On the air reports indicate the same.
I certainly hope not many are used on amateur bands!
>>>Why? Looks a H3LL of a lot more stable and harmonic free than the DAF
>>>series of amplifiers, and I am a fan of the DAF design. Or some of the
>>>homebrew amps I have heard on the bands.
It looks like a copy of a CB amplifier marketed under the guise of a
"amateur linear" by a company that sold out-of-band crystals for
CB radio's in the 70's and early 80's.
>>>Actually, Pride was a manufacturer of amplifiers and VFO's, as well as
>>>frequency counters and the like. They where owned (all or in part) by
>>>Palomar Electronics in Escondido, California. They where also heavily
>>>influenced by a member of this reflector, and a current day businessman
>>>that works in the RF field, still.
>>>One of the "neatest" things about the Pride series of electronics was
>>>their slogan "Manufactured by the handicapped with Pride" (that may not
>>>be the exact slogan.. My amplifier is at home, and I can't look in the
>>>back to see while I am at work).
>>>Bottom line is that the Pride was and still is, one of the best high
>>>gain, ceramic tube amplifiers EVER produced. The power output, gain,
>>>reliability and other things have proven that it is a capable little
>>>powerhouse, and it was cheap.
>>>Have a nice day Tom. Maybe your company should investigate the 4CX250 or
>>>350 series of tubes. They are darn near idiot proof.
--Toll Free
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