开云体育

I literally gave away several 8620A’s at hamfests, hoping Roy didn’t trip over one of mine! I have one lone 8620C with 2-18GHz plug in and maybe anther plug in or two, and several scales. Every now and then I fire it up for sentimental reasons!

I did a bulk buy a few years ago which made a few folks happy. They came from: ?

 Precision Associates Inc. ()

Part number:?

23-41 5747
70 Duro Black Buna N

.023 ± .002 x ID .041 ± .003

Quite cheap if you got 500 then, no idea now...
Dan

Is the attenuator the same form factor as the 8568/8566 attenuator - HP 33321A? If so the attenuator o-rings are spelled out in the 8566 attenuator notes on this site. They are n-butyl rubber and are available from Apple Rubber Co. In New York. They may also still be available from Keysight.

As far as I can tell (from the pics)... it's an 8620A... and getting a scale to match the plug in is not a "... minor issue." (at least it wasn't for me.)
Am I missing something... or is there something special about this particular 8620. (Owned by Bill Hewlett?)
Despite the well staged, and sumptuous color photos... it looks like any other clapped out 8620X, one used to trip over at a ham fests.?

On 5/3/24 19:11, Maciej Kawalkowski, Liberty Electronics Design and Service LLC wrote:

Dave McGuire
Do you still have these ?? Could? you test one in the 3852A?

The ones that I had left are installed in HP-9000 systems at LSSM, but I could borrow one and try it. My 3852A is in a rack, though, how do you reach that board? Can I do it without taking it out of the rack?

Oh yes, also...these boards are 7.5MB; didn't you mention earlier that the 3852A wouldn't address that much RAM?

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

On 5/3/24 20:05, Maciej Kawalkowski, Liberty Electronics Design and Service LLC wrote:

Moved the fuse to the top

I made the same change to my version. My intention was to build a bunch of these via pick-and-place; components on the bottom with all that open space up top was...not welcome. ;)

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

Moved the fuse to the top

开云体育

Dave McGuire
Do you still have these ?? Could? you test one in the 3852A?

Maciej

Does anyone know what size and where I could get "O" rings for my HP 8714 VNA.Attenuator??
One is not there and attenuator is not working properly.

wally KC9INK

Howdy folks,

? ?I am selling the subject line parts, and I understand this group is not primarily for selling stuff, but it *IS* for?
repairing equipment.? ?Since I am willing to part out the sweeper, I figured I would quickly post a link to it here
in case anyone is looking for parts.? ?There are more details and pictures in my original post here:



? To keep down the clutter, I'll take any responses THERE, not in this group.? ?Thanks!

?Dan

He was talking to me.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

开云体育

Which Dave?

Hi all, i appreciate this isnt a HPAK instrument but being Boonton it kinda is :)

Has anyone got a full service manual for these please. Ive managed to find one online but it doesnt have a circuit diagram.

I also have a pdf of Boontons no35 notebook? by G.Raymond. Polen who designed the instrument, but id really like the full manual if possible and it will save me trying to draw out the circuit by hand.

?

And definatly off brand topic, has anyone any details/specs on a Marconi TM9701 VHF/UHF Detector, test accessory. Its an accessory with both a positive and negative output via seperate diodes. Id like to test it but manufacturers specs would be handy.

Many thanks in advance Pete Harrison.

looks exactly like the HP 98257A . Thank you all.

Hi Don,

Your statement that Motorola handled I/O well, but Intel
didn't, puzzles me.

Would you care to elaborate?

-Chuck Harris


On Fri, 3 May 2024 19:26:48 +0000 (UTC) "Don Bitters via groups.io"
<donbitters@...> wrote:

Way back when instrument control was the "Thing" in the
instrumentation world. The HP controllers were focused on I/O control
(Motorola based, PA RISC, etc.) (9825A, 9830A, 9845A, series
9000/200, 300, 500, 700, C110, C180, C270). PC based (Intel, etc.)
generally did not handle I/O well, at least for instrument control.
HP Basic was a great tool and generally established the market for
instrumentation control, especially when they gave it to the
marketplace.It evolved and then HP was splitting itself into Agilent
(instruments) and become a computer company (ies) and HP ported HP
Basic to HP-UX, then a little later dropped support for HP Basic.?HT
Basic created/ported HP Basic to the Intel platform and the rest is
history.Don Bitters

Yahoo Mail: Search, Organize, Conquer

On Fri, May 3, 2024 at 03:30 PM, Dave McGuire wrote:

David Kuder

Two Daves? - got confused. Either way I am grateful.? Holes added to fit 3852A

On 5/3/24 15:22, Maciej Kawalkowski, Liberty Electronics Design and Service LLC wrote:

I managed to find your SMD version.
Only one issue is the hole locations -? other than that I think i will try your design on the 3852A. Will try up to 8 chips. I dont thin you can use more than 4MB in the 3852A

To be clear, I did not design that board; I fixed a few issues, readied it for production, and made a few boards. The original design was done by David Kuder.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

Way back when instrument control was the "Thing" in the instrumentation world. The HP controllers were focused on I/O control (Motorola based, PA RISC, etc.) (9825A, 9830A, 9845A, series 9000/200, 300, 500, 700, C110, C180, C270). PC based (Intel, etc.) generally did not handle I/O well, at least for instrument control.?