[Milsurplus] RF ammeters

[Mike Morrow]

>A question about the typical thermocouple
>RF ammeters used in a lot of WWII transmitters.
>
>How accurate are they at 60 to 1000 cycles?

I have one of the A-61 dummy load/RF ammeter units that was used for SCR-274-N benchtesting.  It has a 5 ohm resistor in it.  I can apply 10 volts *DC* to it and the ammeter will indicate very close to two amps, as expected.

That's one extreme data point.

Mike / KK5F