I wanted to take a minute to thank everyone for all of the replies.
The general consensus is these could be a fun project, but they are a long
way from a high performance transverter. However, I'm still considering
buying one and installing it in the empty battery compartment in my
FT897D...
Although I plan to stick with my original plan to buy a DEMI unit sometime
in the spring.
73
Dan
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-----Original Message-----
From: VHFcontesting [mailto:vhfcontesting-bounces@contesting.com] On Behalf
Of Erich
Sent: Sunday, December 14, 2014 1:56 PM
To: vhfcontesting@contesting.com
Subject: Re: [VHFcontesting] ebay 222 transverter boards
The PA transistor he is showing there certainly has the capability of
producing the 10W. I have been looking at that one for some of my
projects. Without going through a full circuit analysis, it looks like
a fairly straightforward basic transverter,. It uses dual gate MOSFETs
for mixers with no LNA, so I would be concerned about the NF and third
order intercept point. It looks like it uses diode switching for the
T/R switching. Looks like some packaged 97 MHz commercial oscillator
for the LO; would like to know what the accuracy and stability of that
is as well.
73, Erich
N6FD
DM15dp
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