[R-390] test equipment question

[Tim Shoppa]

Ed writes:
> I  guess the audio oscillator would 
> be helpful for troubleshooting the audio  section, although I haven't seen 
> much discussion of audio problems over the  years.

I think any excuse to get an HP 200AB or 200CD is worth it :-). They do
remarkably well at staying constant amplitude as you turn
the dial or flip ranges. The light bulb in a Wein bridge is hard to beat!

Tim.