[ARC5] [Milsurplus] BC-375ers: TU-22 Tuning Unit.

[Robert Nickels]

On 1/12/2016 10:33 AM, Juno wrote:
> For receiving, has anyone tried using analog frequency selective level meters. They cover VLF, LF, and MF and since they were used for "old" analog microwave they're cheap to buy.
Very useful and somewhat addictive if you're into LF and such (I've got 
a shelf full of 'em).   They typically don't have AGC since the purpose 
was to measure levels, so you've got to ride the gain, and some have BFO 
frequencies that are not real useful, but as you say they are cheap and 
you can afford to play and compare.

Back in the early days of radio repair, the "radio analyst" was a 
coveted piece of test equipment, as it could quickly help to isolate 
problems in a receiver.   It included a TRF receiver and a VTVM - aka 
was in essence a tunable (or selective) level meter.   The modern SLM is 
a great workbench tool as well, as it allows you to compare the signal 
at each IF amplifier stage,  for example, or on either side of a 
filter.     Because they were designed for precision measurement they're 
much more accurate than the old analysts, and many have digital 
frequency displays.    Plus, they're just a cool piece of gear.

73, Bob W9RAN