At 3/24/2005 12:09 PM, you wrote:
> >If you wanted a local speaker (which is
> >actually undesired in most cases), you'd
> >have figure out something out,
> >
>
>How is one to test for desense if you don't have a local speaker? When
>you shut off the transmitter with the PTT Disable Switch, what does one
>listen to?
None of my sites have room to spare for a local speaker, so I never
included it in any of my systems. Instead, I built a test/breakout box out
of an old Motorola speaker that inserts inline between the radio &
controller. It has its own LM380 audio amp to drive the speaker from the
discriminator audio passing through it, & can be switched to gate audio
from COS, CTCSS or no gating.
Bob NO6B
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