The SG-297 is a US Military signal generator, FM, 18 – 80 MHz, no doubt for work on military field and vehicle lowband equipment.

The freq readout is analog, which means “okay”, but the measured output is, if you can believe this, down to 0.05 uV.  Amazing.

It must have a super-shielded attenuator. BUT it does weigh. Man, is this thing ever heavy !!  It’s like one cubic foot of solid metal.

I want to thank Robbie of the NWVRS club for making it available to me. A big thank you !

Also to apologize to Sheldon Daitch for seeming to blow off his suggestion of the website for the manual, nonexistant elsewhere.

The website is not designed to help you for free. So i finally bit the bullet and signed on for one month at $9.99 and i downloaded

the URM-103 Depot Mtce manual. Of course a page-at-a-time schematic is not nearly so comfortable as a paper manual with

foldouts, but considerng the alternative, zero, it’s infinitely better than zero.

The freq range is not so useful, altho the attenuator is astounding. I have juggled thoughts of how to change the freq range, and

who knows, since it’s an LC osc with no phase lock loops or such, i may just try to get it to work lower in the HF range. Or i may

read the manual a few times and then decide to just pass it on fror what little i have invested in it so far.

-Hue Miller