1A1 equivalent

I would like to have an updated version of the 1A1 preamplifier.  The main problem with the 1A1 is finding a power unit, such as the 127.  I do not want to get a 500 series scope.  I have a 2465A with ch. 2 output but not the vertical output.  How can I change the Ch.2 output to a vertical output?

If I find a 5003 power unit and a 5000 series deal trace module would I be able to get the vertical output and if so would it need buffering?

Hi Joseph,

What are you trying to do that requires the output of an 1A1?
The reason I ask is that I don't think there's really an equivalent part that does that but there's likely to be another way of doing what you want.

When measuring loop gain and phase with the method presented by the late R.David Middlebrook it is helpful to use a dual channel pre-amplifier with a selectable output, ch. 1, ch2, and ch1 - ch2.  Middlebrook's paper are on the www.venable.com site.

mz

Interesting paper.I don't think we currently sell anything that will do that. Some of the old 7000 mainframes (ie 7834) allow you to output the A trigger signal, but not one minus the other.
Probably your cheapest option would be to get a 50 Ohm BNC relay from a third party.

Just FYI, our newest scopes have software to measure loop gain and phase automatically: https://www.tek.com/en/video/measuring-bode_control-loop-response-of-a-power-supply