[TenTec] Argosy II Mods

[Mike Hyder -N4NT-]

I put an RF gain control in/on a 525D.  The circuit diagram for the 
modification was provided by Ten-Tec.  I just mounted it externally for my 
test.  The thing was totally unsatisfactory -- as I recall, it somehow 
messed up the metering and maybe the QSK.  I couldn't get rid of it fast 
enough.  I never put any other modifications in the rig but have it fully 
loaded with all options.  The biggest improvement I noticed was when I 
substituted the model 220 eight pole SSB filter in place of the stock four 
pole filter.

About Embedded Research...  As I understand it, their audio filter for the 
Argosy was made under license from Ten-Tec.  It was a high quality clone --  
it even looked as if the circuit board was identical to the original.  One 
had to mount all the components (which were included with the kit) onto the 
board.  I built one and was ever so glad that I had an original to go by --  
it made knowing what to put where even easier.

Embedded Research may yet be around but in a different line of business now. 
They may have some boards laying about.  You might be able to research it 
and find callsigns that will take you to someone who knows about it.

73, Mike N4NT

----- Original Message ----- 
From: "Ed" <w3nr at comcast.net>
To: "TenTec" <TenTec at contesting.com>
Sent: Monday, February 27, 2006 6:17 AM
Subject: [TenTec] Argosy II Mods


I have the 525D and need to see if I can find the correct info on curing
the AGC "pop". So far, the candidates are C28 C30 and C40. C28 seems
more reasonable, but can anyone tell me for sure. I've already looked at
the unofficial site and googled.

If you have done the RF Gain mod, where did you put the control. I'm
thinking of using the Notch , as I rarely if ever use the Notch filter.
Any suggestions.


I know this might be a lost cause, but does anyone have the Audio
Filter. ? Embedded Research used to make a clone, but I guess they are
out of business, as I had no luck finding a website. TIA  73

Ed W3NR