Output buffer for a HP 33120A

[TV7]

Hi folks, could anyone in the know steer me towards a good SS circuit to buffer and protect my newly aquired HP33120A Function generator? Being more a tube man than solid state I would not know where to start, however anything that would not load the function generator up and yet provide excellent voltage/surge protection coming back into the unit. If I was going to use tubes, then a well designed Cathode Follower with CCS would possibly provide all the answers. Maybe I should use that?.... Many thanks in advance.

 

[Samuel Groner]

Why is loading of the generator a concern? I didn't look up the specs but it probably drives a 50 Ohm load. The output should be reasonably protected--a pair of back-to-back zeners might help if you expect heavy forces working against the generator. But common use won't damage anything.

Samuel

 

[31697B]

I have used a similar function gen from HP for a very long time and never blew the thing up with 'normal' use. it is well protected.

-RM

 

[john curl]

I agree with Richard and Samuel. You don't need a buffer.

 

[Davey]

I've had one in use on my bench for a long time.

That generator has a 50 ohm source resistance and other internal protection. It's highly unlikely you'd damage it with external loading and/or voltages.

Dave.

 

[TV7]

I appreciate your replies, I am moving into making RF transmitters and due to the large voltages/power associated with tube design I thought it would be prudent. Just worried I would accidentally short some HV somewhere during the build. But who knows, I might be overly concerned....