[Milsurplus] TCS: Better Speaker "Ear Popping" Cure.

[David Stinson]

Still fiddling, trying to get the TCS station ready 
for Novice Rig Roundup.
I read everyone's kind info and schooling on
diode clipping and did some more tinkering.
I think this is what I was trying to do in the first place.
Now installed across the primary of the 
matching transformer in the remote speaker box:

http://home.netcom.com/~arc5/clipper.jpg

The power diodes steer the current so the zeners work.
The clipping level should now be Vzn plus the power 
diode Vfb drop, though I haven't scoped it yet.
Using the 5.6V zeners, the clipping
is just a little too much at high volume levels; 
I'll pick up some 8 and 9 V zeners at the local surplus
house and tweek it some.  
No more "popping" in the speaker during keying;
sounds good.
Left the ones across the headphones alone.
Wearing cans while keying is now almost as 
comfortable as any modern rig I've used.

Better and better.

73 OM DE Dave AB5S