In article , Walter Treftz
writes:

FS: Sierra 121-A, tunable VTVM

Freq range: 10khz - 510 khz

I have a working (I think!) Model 125B. Big. Not real sensitive. Tunes DC to
620 KC in one continuous band.

But that big, cylindrical dial with the moving spot backline is worth the price
of admission! --Mike K.

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