"Phil Allison" wrote in message
...
"patrick-turner"
The 207A is described as an audio sweep oscillator, which I assume means
the F starts at 20Hz and over a time period the F is smoothly changed up
to 20kHz, enabling the audio F response of filters and speakers etc to be
seen on a CRO screen.
** Not at all, it is not a sweep generator.
Operation is purely manual [...]
....unless one employes the 1950's way of sweeping by using a motor fitted to
the protruding rear end of the tuning dial shaft.
HP-297A Sweep Drive, not sure if this device does fit to the 207A, but
anyway:
http://www.hparchive.com/Manuals/HP-297A-Manual.pdf
Gio Re