On 15 Apr 2005 10:49:22 -0700, "Professor"
wrote in
. com:

Yes... this circuit is a real piece of work. The distortion from this
circuit must be tremendous.


A4 is a low-pass filter so it shouldn't be too noisy if the clipper is
used in moderation. But I can say, just by looking at the schematic,
that the frequency response sucks and it will have some major problems
in a number of practical installations. The overall design looks like
it was pasted together from a circuit scrapbook.

One more thing I noticed: The clipper circuit would be better located
between A2 and A3. That way A3 can serve as a buffer between the
clipper and the filter.







----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

I think your evaluation is quite accurate. I was just wondering if
anybody out there had to the sense to know that this circuit is a
terrible attempt at a speech processing. The fact that the principal of
this circuit is to severely clip an audio waveshape... has distortion
written all over it!

Professor
www.telstar-electronics.com



Frank Gilliland wrote:
On 15 Apr 2005 10:49:22 -0700, "Professor"
wrote in
. com:

Yes... this circuit is a real piece of work. The distortion from
this
circuit must be tremendous.


A4 is a low-pass filter so it shouldn't be too noisy if the clipper
is
used in moderation. But I can say, just by looking at the schematic,
that the frequency response sucks and it will have some major
problems
in a number of practical installations. The overall design looks like
it was pasted together from a circuit scrapbook.

One more thing I noticed: The clipper circuit would be better located
between A2 and A3. That way A3 can serve as a buffer between the
clipper and the filter.







----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet
News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World!
120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption
=----

Works quite well. I have used this circuit in many radios. Works
perfectly with UNpowered D104s. This is basically from the TRC-457/458
type radios.

Homer

Works well... LOL
Clipping the hell out of an audio sine wave is the worst thing you can
do for clarity on the air. Let me guess... your handle is "tin ear"...
LOL

Professor
www.telstar-electronics.com

I think your evaluation is quite accurate. I was just wondering if
anybody out there had to the sense to know that this circuit is a
terrible attempt at a speech processing. The fact that the principle of
this circuit is to severely clip an audio waveshape... has distortion
written all over it!

Professor
www.telstar-electronics.com



Frank Gilliland wrote:
On 15 Apr 2005 10:49:22 -0700, "Professor"
wrote in
. com:

Yes... this circuit is a real piece of work. The distortion from
this
circuit must be tremendous.


A4 is a low-pass filter so it shouldn't be too noisy if the clipper
is
used in moderation. But I can say, just by looking at the schematic,
that the frequency response sucks and it will have some major
problems
in a number of practical installations. The overall design looks like
it was pasted together from a circuit scrapbook.

One more thing I noticed: The clipper circuit would be better located
between A2 and A3. That way A3 can serve as a buffer between the
clipper and the filter.







----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet
News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World!
120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption
=----