[R-390] Audio Signal Generator question

[David Wise]

ISTR (I Seem To Remember) that the last 200CDs
were solid-state.  Eh?

73,
Dave Wise

> From: Glen Galati [mailto:eldim@worldnet.att.net]
>=20
> Hello Barry & Crew,
> Nice Find on the HP-200CD. The 200AB is a lower frequency=20
> version (20 Hz to
> 40KHz) vs 200CD (5 Hz to 600 KHz). This line of Audio=20
> Oscillators is one of
> the best and most popular ever manufactured by H-P. Both are=20
> Vacuum Tube