There were a number of external RF speech processor products
available in the early 80s. I can't find the schematic for my Kenpro
KP-601, but popping the cover I see something potentially
home-brewable (all this discussion drove me to find it, as after
changing compression ratios of the KSB2's
Hi, all concerned:
I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100
discrete parts on a 4X6in board.
What the device does is to heterodyne baseband audio to vlf, put it through
a USB filter, limit it, lowpass-filter it, and heterodyne it to baseband.
Inband distortion
In a message dated 04/03/05 11:00:07 GMT Standard Time, [EMAIL PROTECTED]
writes:
I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100
discrete parts on a 4X6in board.
---
I have one of the Datong D75 RF speech
Yes, that's the one I had and was referring to... it worked great. I
knew it was Com-something ;-) Sounds like there are already a couple of
knockoffs out there.
Larry N8LP
David J Windisch wrote:
Hi, all concerned:
I have an old Comdel in-mic-line r-f clipper, which uses fewer than
100
This is one for Eric to weigh in on, but with proper in/out routing
between transmit and receive, I wonder if it wouldn be possible to come
up with an algorithm to make the KDSP2 work as an rf clipper/filter in
transmit with baseband audio output? Of course, the settling time
between T/R might
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