[ARC5] What is THIS?

[Mike Morrow]

>I noticed that dial calibration too.  I have one of those 0 - 100, ARC-5-like
>dials and always wondered what it was for.

The dial is very common.  It is that used on the front panel of the RU-* and RAJ
series of receivers, with 0 to 100 in 180 degrees of dial travel.  It is NOT the
dial used in the RU-* receiver remote tuner, NT-23012, which was also 0 to 100
in 270 degrees of dial travel and was mechanically very different.  It could also
have been pirated from the front panel of a SCR-A*-183/283 receiver.

The only area in which the USAAC SCR-A*-183/283 is superior to the USN RU-*/GF-*
and RU-* liaison sets is that dials for the receiver remote tuner MC-125 (equivalent
to the USN NT-23012) were available calibrated in actual frequency for at least
some of the receiver bands.  The USN RU-* always used 0 to 100 dials versus tuning
charts and CFI signals to actually determine frequency.  Never was a dial calibrated
directly for frequency on the RU-*.  Being TRF, the RU-* worked OK with that.

Mike / KK5F