HP 1722A

Not a lot. On eBay, probably $150 if it's in good shape.

Cheers

Phil Hobbs

Below is a link to a 1974 HP Journal that will give you the skinny on the 1722A's far out capabilities. Catch you on the flip side.

Best regards, Spehro Pefhany

There was only one offered on eBay since January and it's an HP1722B. Note the mangled vertical gain knobs and shafts on both channels. Also the broken "foot" on the back (where the power cord is wrapped). They were asking $195 plus $52.25 shipping (ouch) and it didn't sell.

I remember shirts like that.

Here is a free PDF of the service manual:

Such shirts are still being sold:

I still have two functional 1725As. The problem is those old scopes have hybrids in them. You need a spare scope to keep them going.

Actually I bought one working 1725A years ago. I found a cheap junker for parts. My junker ended up supplying parts for someone elses 1725A. [Gratis on my part because I'm just sooo nice.] So when the person wanted to get rid of that 1725, I figured I better buy it since it had all my parts in it anyway. Plus having a spare functional 1725A kept the other scope scared shitless of being a parts scope, and then it never quit.

But I think I paid $100 15 years ago. Today you would be far better off just putting the money into a Rigol than getting a 70's era HP scope.

I've turned down working Tek 7904s with all the plugins for $150. And that was with the cart included. [You need the cart for those boat anchors.]

But the 1722 is like the 1725 in that they are reasonably high bandwidth. Sometimes it is nice to have an analog scope as a sanity check.

The delayed sweep is kind of funky on those old HP scopes. They weren't particularly popular when they were new. The trigger was much maligned, but I never found it to be as horrible as some stated.

High praise indeed!

Well, the Tek scopes of that era were a bit better on the trigger. But the talk around the water cooler was the HP scopes didn't work at all, and that wasn't the case.

The Tek 465 was basically the workhorse at the time. Or at least the 400 series. I may not have the exact timeline, but the 465 was a late 70's scope.

?-)

I had a white jumpsuit with space for a diaper and every women smiled to me instantly :-)

Early 70s I think -- of course, they would've had more market share and better prices by the latter end. My 475 for instance is dated 1973 or so (465 of course predates it by a couple).

Tim

-- Deep Friar: a very philos>> >>> but I never found it to be as horrible as some stated.

The last decent HP scope was the 130C.

To HP, "trigger" was a horse.

It has been downhill forever after.

that documents goes on about BASIC timesharing computer systems.

the competition between HP and GE must have been quite fierce.

Now that is funny. I must agree.

tm

Until about 10 years ago, when Agilent figured out how to make scopes and Tek figured out how to make spectrum analyzers at roughly the same time. Check out the Infiniium series--they're very swoopy.

Cheers

Phil Hobbs

$75.