[time-nuts] HP 3325B Function Generator and GPS based frequencycontrol

[John Ackermann N8UR]

I've always been curious about the 3325A vs. B -- there is more price 
spread between those two than just about any other HP A vs. B model. 
What's the difference between them, and is it worth anything like that 
much (obviously, Mike doesn't think so :-) ).

I've been happy with my A model, though it often fails amplitude 
calibration on powerup.  Waiting a few seconds and then running the cal 
always works, though.

John
----

Mike Feher wrote:
> Seems like a lot of money to pay for one. I have been using an HP 3325A for
> about 25 years and like it very much. I bought it brand new from HP for the
> company I worked, where I was director of engineering. After I resigned, to
> pursue greener pastures, they eventually closed down their hardware
> capability and operations and offered me the entire laboratory and inventory
> which then I purchased personally. I would recommend you getting the "A"
> version for about one fifth of the price of that "B" model, unless, you have
> an overwhelming desire to get the "B" for some special reason. Option 001
> provides the high accuracy ovenized reference and it does not look like the
> one on ebay has that option. Normally they would use a TCXO. Regardless,
> since you will be using an external reference it really does not matter. The
> "A" also accepts an external reference and I run my off of a local Rubidium.
> 73 - Mike