[NLRS] PA3GIE 10GHz high power SSPA

[S. Earl Jarosh]

Barry,

Maybe you can touch on the highlights or provide some synopsis at Aurora for
the rest of us?? 


S. Earl Jarosh, N0HZ
Cell:  612.868.1313
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-----Original Message-----
From: nlrs-bounces at mailman.qth.net [mailto:nlrs-bounces at mailman.qth.net] On
Behalf Of Barry Malowanchuk
Sent: Saturday, October 20, 2012 1:34 AM
To: geraldj at weather.net
Cc: nlrs at mailman.qth.net
Subject: Re: [NLRS] PA3GIE 10GHz high power SSPA



Hi Jerry,

It is not on the CD...wish you were here !

Barry VE4MA

----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj at weather.net>
To: nlrs at mailman.qth.net
Sent: Friday, October 19, 2012 9:03:06 PM
Subject: Re: [NLRS] PA3GIE 10GHz high power SSPA



I read a couple weeks ago that the DB6NT 50 watt amp is $3500.

There are some bare chips from Triquint that will do 90 watts for only $240
each in small quantities. Trouble is they need wire bonding after soldering
to the heat sink with Sn/Au alloy solder. I think there's a presentation
this weekend at MUD that's not in the printed proceedings. 
Maybe it will be in the CD if there is a CD. Set for 3:30 Saturday:
"3:30 50W 10GHz SSPA using GaN, WA6KBL" from the presentation schedule. 
I wish I could see that presentation or read it. I have my own ideas
thinking a Sn/Bi low temperature solder would be far easier to find and to
use and that rather than multiple ball bonds one might solder down PC board
traces right close to the bare chip and make the chip connections with
silver bearing epoxy and thin copper foil. Then cover the assembly with a
good curing board coating though that might increase the dielectric constant
and be a poor quality dielectric at the same time. 
Just to project the chip from the atmosphere. There is a 10 watt version of
the Triquint chip far less expensive that is like 1/8 th of the 90 watt
chip. In fact the S parameters on the high power chip are for the 10 watt
chip, repeated 8 or 9 times for the 90 watt part.

73, Jerry, K0CQ

On 10/19/2012 5:52 PM, Doug Reed wrote:
>
>
> <http://www.gie-tv.com/3cm/3cm-pa.html>
>
> For those of you who want to jump to the next level of 10GHz RF power, 
> here is a 25 watt amp. Requires 200mw drive for 25W out. I didn't 
> bother looking any deeper because I don't have EU1695 to spend.  :-)
>
> 73, Doug Reed, N0NAS.
> ______________________________________________________________
>
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