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Andrea Have a look at : https://dj6ta.darc.de/programm/ The documents are in german, but you have a set of softwares (based on HT Basic) to drive test gears, and some set up with various GPIB

I used the 3586 in several of the FMTs and was worried about the BFO. It turned out that the stability was just fine. However, you didn't want to derive the measured frequency from the beat note as

Thanks John, I knew that someone would recall the issue with better clarity. At first I recalled it was only the BFO, but then I talked myself into it being other mixers too... My recollection is the

Hi Roy, It was a while ago, but I recall it being a microcontroller's output - so a few milliwatts. I've been conversing with Vladan here lately, and shared some videos ( https://youtu.be/AVyG9URKgl4

Note: This is a cross-post for any of you in the HP80 series groups.io group. I'm afflicted with an interest in the HP85 computer also. Hello fellow HP/Agilent junkies! A while back, I stumbled upon a

The only part of the 3586 frequency chain that is not locked to the 10 MHz reference is the BFO. Two 2 MHz range crystals are divided down to serve as injection oscillators at the final very low

I would like to offer some very serious advice. When you replace ANY memory battery, do not mount it on any circuit board. Mount it off the board in a liquid tight enclosure that has a small vent for

Hello Guido, I have a Revision C version with one EPROM. Sorry I cannot help you. Glad to meet another HP guy in NL. Jaap

Hello, It's been a while since I provided a status update on the ongoing Applications and Service Notes project. Application Notes:

HI Milan/Mark Well thanks to your help I now have got to the bottom of this issue. Firstly in mitigation:- Not having a schematic I was loathe to just unplug the inverter and measure the control

As I recall, one of the interesting things about the 3586ABC is with all of its synthesizer capability, it uses separate crystal oscillators to handle internal mixers. This is a known accuracy flaw in

Hello I'm looking for physical or scanned op and service manual for the 86601A rf plugin, option H04 (extended frequency range to 160 MHz) Found a pdf of option aplied to 8660 system and rf plugin but

Try applying a generous amount of naphtha (lighter fluid or WD-40) and let it soak for a while. That should loosen the adhesive.

As someone with a strange variety of activities, I'll suggest a beekeeper's hive tool. Perfect tool for that job (and a great many others)! Steve Hendrix

Apply heat. A hot air source, such as a blow dryer if you don't have the "real thing" for hot air generation, like in smd service/repair equipment. Better to persuade gently than to brute-force it!

They will come out, but you have to mangle them to pull against the double-stick adhesive tape underneath. Take a small flat screwdriver with as thin a blade as you can find, and jam it in on an edge

Hello Jaap, I am looking for a backup of the firmware used in the 85620A hardware? version "B" consisting of 3 eproms (27C512). If your version is of the hardware release "C" then it uses a single

I have an HP141T mainframe spectrum analyzer that I would like to rack mount. The manual says to use a thin bladed tool to remove the aluminum trim strips. My HP141T still has these strips in place

If you are in a 50Hz region, it could be a power supply ripple? So I would check caps, diodes, etc. Leo

My HP 3586's counter reads about 24 Hz high on any input frequency. The rear panel fx output reads whatever is input to the front panel. It passes all TF tests with the exception of TF-13 - 3-2