Hi Shaun,
I HAVE NO IDEA I got mine at no cost from a group called the Country
Cousins. I think Handi Hams also have one ore at least used to have one.
It is possible that you can find a fellow ham to build one for you.
Basically it is just a audio oscillator. The same thing that is used as a
practice oscillator for CW. You should be able to have one built for $10 or
$20 and I am not sure how much that is there. I hope this helps. 73.
Walt
WA4QXT
New London CT
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