[hpsdr] SB104A Power Amp

[g4fre at g4fre.com]

I am currently using the pa strip from a drake tr-7 after my penelope board.
It needs a 40db attenuator on lf and a 30db attenuator on hf on its input to
reach 100w output. It will give 200w on 80m, but not recommended.

 I have relay switched lpf on it's output controlled from penny via an
optoisolator interface board as the relays need +12v to activate, not the
open collector drive already supplied

Not as neat as alex will be, but i did work k1rqg on it on 80m tonight after
I used it to work him on 432MHz eme

Dave

ww2r




-----Original Message-----
From: hpsdr-bounces at lists.hpsdr.org [mailto:hpsdr-bounces at lists.hpsdr.org]On
Behalf Of jkelly
Sent: Saturday, January 03, 2009 9:53 PM
To: hpsdr at lists.hpsdr.org
Subject: [hpsdr] SB104A Power Amp


***** High Performance Software Defined Radio Discussion List *****

I am intriqued by the idea of using an amp module from an older rig
in storage in the shack for a HPSDR power amp.

I have a working SB-104a laying around and taking a quick look at the boards
it looks like it might work out.

Here is a top view photo:
http://mysite.verizon.net/jkelly/ham/SB104-3.jpg

This is a little out of my league but would appreciate any comments on
whether this could work with Penny and any ideas to get started.

thanks,

Jeff
KT2K

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