[Elecraft] Elecraft Linear Amp/TE Systems

[Dick Hanson]

Another feature, not well known nor advertised, is that their (TE Systems)
amps have "active bias".
This greatly improves their linearity and cuts down on local splatter. 
Many of the existing solid state amps do not have any sort of stabilized
bias which is why so many of them on 6, 2 and 432 sound so bad.
73, Dick, K5AND

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Doug Faunt N6TQS
+1-510-655-8604
Sent: Thursday, July 19, 2007 10:12 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Elecraft Linear Amp

   From: "Bill W5WVO" <w5wvo at cybermesa.net>
   Date: Thu, 19 Jul 2007 20:12:51 -0600

   Another good choice for a medium-power 6M solid-state amp is the TE
   Systems 0552G, made in USA, a very robust unit that will put out
   400W (1:15) into a 50 ohm load. It runs cool without a fan at
   CW/SSB duty cycles, and will handle key-down carrier modes with the
   addition of a fan on top of the heatsink. Love mine...

   For those with no familiarity with TE Systems, I gather that they
   do a lot of military contracts and do the ham stuff as kind of a
   sideline. (Somebody correct me if I'm wrong.) They don't advertise,
   they have no website, and vendors purporting to be distributors for
   them typically have no actual stock, so you might as well order
   direct from TE. Their phone number is (310) 478.0591.

They do advertise in QST every now and then.

   The chances of finding a used for sale on the ham market are
   slim. People tend not to sell them once they get them. I looked for
   a used one for a month before giving up and ordering a new one.

I recently picked up a 400W 2M TE Systems amp on eBay for a reasonable
price, so don't give up too quickly.  But they're not common.  I'm not
really happy with high-current low (13.8V) voltage devices, but....


73, doug

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