On Oct 15, 2015, at 4:06 PM, John Griessen john@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

?

Does anyone have experience programming them with GPIB to make plots?
I'm wondering if that is a viable option since the displays are so old and fading...

Hello group. ?I have been able to purchase a 2nd HP-8568B SA unit, this one with the rear cables and with a HP-8444A (opt 059) tracking generator.? I was so happy to see that by swapping cables from one unit to the other, both 8568B's work just dandy, after the ovens warmed up. ?It amazed me at how close they both were in frequency and amplitude accuracy. ?I did however notice that one unit has a flashing "BATTERY" next to the cold oven indication while the unit warms up.

I have DL'ed every doc I could find on these units but before I rip into them to find and replace the battery can someone save me some time by possibly knowing whether the required battery is in the top or bottom unit and if the battery is difficult to get to and replace? ?Also, what battery type is needed.

I have also ordered a set of cables for the original SA unit.? I am so happy about these two units as they are clean with bright and crisp displays. ?I played with them till 3 AM and running the VBW down to 1 Hz was a real treat.? Having two separate RF inputs is a real hoot as well.......what a neat SA these are.? Thank you all that have helped me with tips on finding some cables and even a very kind sole who offered to lend me a pair so I could check my unit out before I purchased !

Gedas, W8BYA

Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.

On Thu, 10/15/15, wallydoc@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: [hp_agilent_equipment] HP3325 transistor
To: hp_agilent_equipment@...
Date: Thursday, October 15, 2015, 9:53 AM






























I broke and rebuilt a HP 3325A function generator.
It appears that everything works up to the power
amp.Power amp has had most transistors
replaced and does give out an appropriate signal as far as
amplitude.The wave forms are OK at the
test point prior to the final. The output sine waveform from
final is distorted and of course square is distorted at
higher freq.I was planning to replace
the power amp input dual transistor 1845-0357 (SD2608).I
think it's selenium 360mW NPN. I cannot find SD2608 or a
cross to it. There is an original 1854-0357 on E
Pay.Does anyone know what this crosses
to?Do you think this could be the
problem?Any other suggestions as to
aligning the final amp? Any particulars as to the
replacement of transistors?Wally
KC9INK

----- Original Message -----
From: pianovt@... [hp_agilent_equipment] <hp_agilent_equipment@...>
To: hp agilent equipment <hp_agilent_equipment@...>
Sent: Wed, 14 Oct 2015 22:58:08 -0000 (UTC)
Subject: [hp_agilent_equipment] Re: HP 8559 / 853A How to peak hold and normalize display??

Lenny,

The 853 storage, if I remember correctly, was based on the HP 8750A Storage Normalizer. The buttons have different names, but the concept is similar. You may find some useful instructions in the HP 8750 manual which you can find on the web.

Vladan

On Thu, 15/10/15, wb4yvo@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: Re: [hp_agilent_equipment] Hp 141T
To: hp_agilent_equipment@...
Received: Thursday, 15 October, 2015, 2:29 AM


?









No I havent checked anything yet..Please send a
email to me and I can send pictures ?Maybe that will help
better..
Skip..
?Wb4yvo@...









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