Dave,
I just installed the DAFC from Conny (DL1SDQ)
http://conny-dl1sdq.de/3061/3115/index.html
He has a model PCB designed specifically for the TR-7
and it was easy to install and works extremely well.
I have left it on for 24 hours just to see what it would do from a
cold start and it has stayed tuned exactly where I set it with
no measureable drift at all. I love it!!!
It fits inside the rig and attaches under the main board with
all of the connections being made locally. The modification
is invisible and easily reversible if for some reason
you want the drift back at some time in the future. ;-)
It is strange but neat that the Germans are still modding the
TR-7 to perfection 30 years after it's initial release!!!
73,
Mike WA3WOM
----- Original Message -----
From: "K8JDC" <[email protected]>
To: <[email protected]>
Sent: Tuesday, September 14, 2010 9:32 PM
Subject: [Drakelist] TR-7 VFO Stabilizer
Gents,
I'll pre-apologize to the purist readers who want to leave things
in original form. I've been considering (1) adding a VFO stabilizer to
my TR-7 or (2) possibly modifying my RV-7 with a DDS VFO. I've read the
PA0TRT/PA0KSB articles on the VFO stabilizer. The K4DPK stabilizer will
apparently work on the TR-7 although his webpage insinuates otherwise.
When I contacted him today, he said it was a bit difficult to install in
the TR-7 but that it would work. I've been considering the VFO
stabilizer over the DDS because it's quicker to install.
Okay, question: Have any of you installed the K4DPK version in a
TR-7? Will it fit under the main board like the PA0 versions? Did you
like it after it was installed? Advice?
I would consider the DDS mod to the RV-7 instead if I got a lot of
input in that direction. I'm just busy and wasn't really intending to
undertake a big project right now. I've never messed around with a DDS
kit so I would have to climb the learning curve whereas the VFO
stabilizer might just be a matter of installing the kit. That was my
thought process anyway...
Dave
K8JDC
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