eHam

eHam Forums => Amplifiers => Topic started by: N2AYM on May 21, 2019, 12:08:20 PM



Title: Green Monster
Post by: N2AYM on May 21, 2019, 12:08:20 PM
I seem to remember in the 1970's a VHF amp with a nick name of
" The Green Monster". I don't remember much about it other than
it was in a cabinet painted the typical military olive drab green and
it was also known to be a brute strength amp with a very reliable
reputation. Just asking for nostalgic reasons. At that time in the
70's I was just starting to get acquainted with ham radio and was
being elmered by a group of hams in a local club that was using
this amp for it's repeater that had a killer coverage range. Just
did some google searching and came up with nothing. Anyone
remember anything about it?


Title: RE: Green Monster
Post by: WA4JQS on May 21, 2019, 04:06:50 PM
If it was used on  a 2 mt FM repeater as a amp it may have been the TRC-28 amp. used a pair of 4cx250's.  Army used it with their VRC 19 radios.
73 Tony WA4JQS


Title: RE: Green Monster
Post by: WA4JQS on May 22, 2019, 05:53:53 PM


Tony,

I saw your post at eham in response to the question from N2AYM.

The amp he is inquiring about is the AM-494 as described in the attached 73 Magazine article, also available in various file formats at
https://archive.org/details/73-magazine-1971-05

I have one.  Amongst my contemporaries, the AM-494 was known as a “Green Box” amplifier.  As WB6CYT put it to me, “You can get a kilowatt out of it – before the tubes explode!"

If you have a way to forward this info to eham or to N2AYM (as I am at work presently), I would be grateful.

VY 73

Jan
WB6VRN


Title: RE: Green Monster
Post by: W1BR on May 23, 2019, 04:02:30 AM
GE also made a stand alone 4CX250 cavity amplifier that would operate on two meters.  We ran one for a few years on the Mt. Tom 94 repeater.  Not   green, but the typical blue styled GE box.

Pete


Title: RE: Green Monster
Post by: N2AYM on May 23, 2019, 06:52:45 AM


Tony,

I saw your post at eham in response to the question from N2AYM.

The amp he is inquiring about is the AM-494 as described in the attached 73 Magazine article, also available in various file formats at
https://archive.org/details/73-magazine-1971-05

I have one.  Amongst my contemporaries, the AM-494 was known as a “Green Box” amplifier.  As WB6CYT put it to me, “You can get a kilowatt out of it – before the tubes explode!"

If you have a way to forward this info to eham or to N2AYM (as I am at work presently), I would be grateful.

VY 73

Jan
WB6VRN

Thanks Jan - I downloaded the pages I need from that article.