Another "whatsit?"

[Jeffrey Herman]

Here's another item someone gave me: Made by Disa Elektronik (Denmark)
with with the following controls:
High-pass filter Hz (detent tuning knob with markings 1-1000 Hz
Low-pass filter kHz (with detent tuning from .2 to 200 kHz)
Gain (two controls, one marked Coarse, second marked Fine)
Zero Adj. (two controls, Course, and Fine)
Output ("Inv." and "Non-Inv."
Square Wave (two controls, "Freq" [runs from .3 to 30 kHz), and
   "Amplitude")

Also has 4 BNC jacks (one input, two output, and one for square-wave
output).

Front panel markings say DISA Type 55D 25 Auxiliary Unit.

Whatsit? Anyone need it? Got something to trade for it?

73,
Jeff KH2PZ

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