Most can be modified by putting a small jumper wire, from the ground side of
the antenna, to the ground side of the earphone jack. Many of the earphone
jacks have a resistor, in series, on the ground side. Shorting this out to
true ground, gives you full output. This is a protection device, so people
don't damage their ears.

Bill Crocker


"LoneGunman" wrote in message
...
Can the Radio Shack Pro-89 be modified for more output volume? with 2
pair of headsets, it could use just a bit more power. If so, any
online how-tos?

Thanks