Teddy Roosevelt once said:

"It is not the critic who counts: not the man who points out how the
strong man stumbles or where the doer of deeds could have done better.
The credit belongs to the man who is actually in the arena, whose face
is marred by dust and sweat and blood, who strives valiantly, who errs
and comes up short again and again, because there is no effort without
error or shortcoming, but who knows the great enthusiasms, the great
devotions, who spends himself for a worthy cause; who, at the best,
knows, in the end, the triumph of high achievement, and who, at the
worst, if he fails, at least he fails while daring greatly, so that his
place shall never be with those cold and timid souls who knew neither
victory nor defeat."

So why do you reply to them Brian?

Jay in the Mojave


Telstar Electronics wrote:

On Aug 3, 6:14 pm, "Frank" wrote:

Why are you showing the use of coax to connect the board ? That board has
NO RF filtering and it is NOT shielded in any way. I can imagine what will
happen when it is incorrectly installed in a radio or not shielded with a
filtered supply and filtered input.
It looks like a half finished design. The LED is of no use as that will be
inside the radio and only indicates what the level is at the board - not
what it is on the carrier from the radio. You will also need an
oscilloscope to set it up correctly. I would also be interested in you
telling me how you think the average home user can adjust FM deviation
correctly without the use of a test set!
I wouldn't bother buying one of those, most radios have a better circuit
built in anyway, so having two in series would be of very little use and
would distort the audio or cause extra power consumption in a handheld.
The product is of no use! It would have been good in the 80's before the
K40 and Protel mics were used on CBs. Current CBs and amateur equipment
would not tolerate that circuit as the impedances are completely wrong too.

You haven't researched and appear to have very little working AF/RF
knowledge.


Coax is certainly necessary... and the board is fully shielded. What
do you think that tin plate is for?
The rest of your comments show that you obviously have not read the
installation manual. I suggest you do so at http://www.telstar-electronics.com/VoiceMax%20B.pdf
Thanks for your comments.