[IRCA] Local station off-air sensing

["Craig Healy" <bubba@xxxxxxxxxxxxxxxxxxxx>]

> > Too bad the old Conelrad radios are long-vanished.
>
> You can find them every now and then.  it's called
> luck and junk.

Yes, but not with any predictability.  Besides, most were tube type, and
well used-up.  I don't even remember when Conelrad was phased out in favor
of the dual tone system.  Mid to late 70's, perhaps?  I vaguely remember one
at WGNG-550 in 1975.

Some modulation monitors had a carrier failure alarm, too.  They may be more
common.  Many require an external RF amp.  Now that I think of it, the
silver face Belar RF amp output could be rectified and used for this.  There
was an RCA branded version of the same thing.

Craig Healy
Providence, RI


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