Mic PPT button

Icom HM 133. PTT getting bad. Any clues before I take it apart? Jack.
Scare up a suction-cup tabletop vise for the kitchen table and pad the jaws well.
Secure the mic so that PTT doesn't move the mic or cord.

Then do some tests to make sure that
it's truly the PTT that causes the static,
and not jiggling the mic element
or any part of the mic cord,
or the plug at the radio end.

Just don't crack the mic body like an eggshell.

And yes, that mic has an integral keypad, doesn't it.
Maybe you can grip the mic from the rear hanger somehow.

I'm sure it sucks to be playing silly games like that,
but I fantasize that more operators have been scrod in general
by intermittents in the cord than a dying microswitch.


Back in the day I thought my Yaesu H/T's speaker mic had developed
an intermittent at the plug. I actually bought a pair of four-conductor
Tip-Ring-Ring-Sleeve plugs at Hamvention (before smartphones made them trendy),
only to discover that those H/Ts had craptastic jacks, and you have to
keep the mic plug pushed in to eliminate an intermittent. So now I operate
with a rubber band wrapped around the HT to hold the plug in.
 
Scare up a suction-cup tabletop vise for the kitchen table and pad the jaws well.
Secure the mic so that PTT doesn't move the mic or cord.

Then do some tests to make sure that
it's truly the PTT that causes the static,
and not jiggling the mic element
or any part of the mic cord,
or the plug at the radio end.

Just don't crack the mic body like an eggshell.

And yes, that mic has an integral keypad, doesn't it.
Maybe you can grip the mic from the rear hanger somehow.

I'm sure it sucks to be playing silly games like that,
but I fantasize that more operators have been scrod in general
by intermittents in the cord than a dying microswitch.


Back in the day I thought my Yaesu H/T's speaker mic had developed
an intermittent at the plug. I actually bought a pair of four-conductor
Tip-Ring-Ring-Sleeve plugs at Hamvention (before smartphones made them trendy),
only to discover that those H/Ts had craptastic jacks, and you have to
keep the mic plug pushed in to eliminate an intermittent. So now I operate
with a rubber band wrapped around the HT to hold the plug in.
Thanks, Alan. The spare one works fine if I hold the button in hard, so I'm pretty sure that the issue is with the mic. And just when I finally got my antenna rotor control/indicator up into the kitchen. Jack.
 
Thanks, Alan. The spare one works fine if I hold the button in hard, so I'm pretty sure that the issue is with the mic. And just when I finally got my antenna rotor control/indicator up into the kitchen. Jack.
Q: Do you think it uses a sealed microswitch,
or an ad-hoc switch made out of bent copper leaf springs and the like?


Don't get ahead of yourself on teardown.

You don't want to remove The Fourth Screw from the housing
only to discover it spits spring-loaded components like,
well, like almost any gun action during a detail strip.
 
I was telling my elmer about your 3-story tall stealth beam rotator.
Well, that's just what I mean. Anyone in their right mind would just buy a rotor and mount it on the roof. I, of course, have to spend days building a system using a reversible gear motor, belts, pulleys, st st tubing, selsyns, cabinets, duplex bearings and flanges to go from the basement and up thru the roof. But it was fun. PS. The coax goes from the beam down thru the length of the tubing. Jack.
 
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