OMG! OMG! OMG! What a great project box and project boards. I try to keep the boxes with the power supplies if I have the storage for them. A simple Bud box costs a fortune these days. But things like this already fit racks and have power supplies, and they're free.
We use Keithley's version. They are great for automated measurements. Hall effect and resistivity measurements require that different pairs of contacts be connected to the voltmeter in sequence. (Some methods require that the current source be multiplexed as well.) Thus we can program up measurement sequences that measure charge transport properties vs. temperature and/or magnetic field. Quality control can also use them with their "beds of nails" to verify circuit board function.
This is a way to save at least part of the device that would otherwise end up in the scrap, I'm currently looking for a narrow version and a black and blue HP logo for another project to build a multifunctional balanced power supply. I don't pinch the wires, but I honestly unsolder them. I wonder what you will get out of it ......... Nice day 🙂 Tom
I love HP stuff because it is always so well made. In the 70s I had an HP25 calculator. I chose this over the TI57 because it just felt so much better. The buttons had a nice positive click feel. Not spongy like the TI. This was my introduction to programming and I think the RPN notation set me on the correct course for writing simple and efficient programs. The main problem was that it forgot everything when switched off. So I just left it permanently plugged in to its power supply.
For custom gpib controller, there is the AVR488 usb (serial) to GPIB adapter project that implements the prologix "protocol". I've also been working on an esp32 version of this code (AVR488-ESP32 on sourcehut, there is a copy on gh) with extended features and support for wifi and bluetooth. I am also condering implementing a version of the code embedding a Basic interpreter, for the fun. (Probably won't find the time to do it but I like the idea 😃)
A bit more on programming my HP25 calculator. I don't think I used it for anything useful (except as a calculator). But the programming was so intriguing that I quickly became hooked. I used to wake up in the middle of the night with yet another idea to try. Often, before I knew it, the sun was coming up and the birds were chirping outside the window, and it was time to get ready for another sleepy day at work. Lol.
In the past I've used a Keithley 705 switcher as parts donor to fix a number of other Keithley instruments, case, switches, switch caps, etc, was a good and cheap source of spare parts.
Front panel display is the only thing of worth, and the connector, power switch and the rack ends, plus the screws. All used on other HP/KS/Agilent equipment, and often missing. GPIB is also worth it, as they also fail, along with the processor, so that board has value, along with the relays, which are common as well in HP equipment.
A shame to see it broken down however they are ten a penny on Ebay so can't really complain. The cards however are worth keeping or selling on as they also (some at least) work in the Agilent 3499A unit. These units still have their uses for any kind of automation, there are many different types of cards available. GPIB is making a comeback somewhat.
GS-R405S was a DC-DC converter. 9 to 46 V in, 5.1V out. 4 amp max. Quick find on Digikey with note that it is obsolete. I did find some GPIB chip sets still being made (Intel 8291 and 8292 set for example). And I even found (and lost the reference to) a single chip implementation. I just don't know why I'd want to use them. And I got no problem with you scavenging parts. Just because something is old doesn't mean that it should be saved. Excepting you and me of course.
Together with the capacitor voltage of 50V the module with the number 4005 looks like an early switched 40V to 5V module working at maybe not much more than 20kHz.
No HP distructo hate but was wondering how many parts it's in now and will it take more space than the whole thing shoved in the corner... Project repurpose the Relays for say HF switching (probably still good for that) or maybe repurpose a whole relay card with say a Pi or Pico or ESP etc making a modern network attached relay controller ...could be sweet if you hav a use for some such ...maybe controlling the power to the individual bits of kit in your shop??? Keep it up I love this channel
Those translucent, Gold Plated, hand laid Circuit Boards are so beautiful.
Yea, I hope it was broken though because I’ve seen them all of today between $150-$500 , parts to functional. Education is priceless i suppose.
OMG! OMG! OMG!
What a great project box and project boards. I try to keep the boxes with the power supplies if I have the storage for them. A simple Bud box costs a fortune these days. But things like this already fit racks and have power supplies, and they're free.
You typed my thoughts well.
God Blesss
We use Keithley's version. They are great for automated measurements. Hall effect and resistivity measurements require that different pairs of contacts be connected to the voltmeter in sequence. (Some methods require that the current source be multiplexed as well.) Thus we can program up measurement sequences that measure charge transport properties vs. temperature and/or magnetic field. Quality control can also use them with their "beds of nails" to verify circuit board function.
This is a way to save at least part of the device that would otherwise end up in the scrap, I'm currently looking for a narrow version and a black and blue HP logo for another project to build a multifunctional balanced power supply.
I don't pinch the wires, but I honestly unsolder them.
I wonder what you will get out of it .........
Nice day 🙂 Tom
I love HP stuff because it is always so well made. In the 70s I had an HP25 calculator. I chose this over the TI57 because it just felt so much better. The buttons had a nice positive click feel. Not spongy like the TI. This was my introduction to programming and I think the RPN notation set me on the correct course for writing simple and efficient programs. The main problem was that it forgot everything when switched off. So I just left it permanently plugged in to its power supply.
For custom gpib controller, there is the AVR488 usb (serial) to GPIB adapter project that implements the prologix "protocol". I've also been working on an esp32 version of this code (AVR488-ESP32 on sourcehut, there is a copy on gh) with extended features and support for wifi and bluetooth.
I am also condering implementing a version of the code embedding a Basic interpreter, for the fun. (Probably won't find the time to do it but I like the idea 😃)
A bit more on programming my HP25 calculator. I don't think I used it for anything useful (except as a calculator). But the programming was so intriguing that I quickly became hooked. I used to wake up in the middle of the night with yet another idea to try. Often, before I knew it, the sun was coming up and the birds were chirping outside the window, and it was time to get ready for another sleepy day at work. Lol.
In the past I've used a Keithley 705 switcher as parts donor to fix a number of other Keithley instruments, case, switches, switch caps, etc, was a good and cheap source of spare parts.
I agree, tear it down.
Lots of nice aluminum panels!
What a treasure trove of quality parts! Too bad it didn't include the HP 44472A VHF modules.
looks like it's good to use as a 2U rack mount case for repeater projects
I like the high-speed handy work!
These HV caps tricked me once, they only look like bulged ones. They have a plastic dome on the top, and one in your device is probably fine.
Yep thay tend to have a big dolup of plastic on the top
Front panel display is the only thing of worth, and the connector, power switch and the rack ends, plus the screws. All used on other HP/KS/Agilent equipment, and often missing. GPIB is also worth it, as they also fail, along with the processor, so that board has value, along with the relays, which are common as well in HP equipment.
A shame to see it broken down however they are ten a penny on Ebay so can't really complain. The cards however are worth keeping or selling on as they also (some at least) work in the Agilent 3499A unit. These units still have their uses for any kind of automation, there are many different types of cards available. GPIB is making a comeback somewhat.
GS-R405S was a DC-DC converter. 9 to 46 V in, 5.1V out. 4 amp max. Quick find on Digikey with note that it is obsolete. I did find some GPIB chip sets still being made (Intel 8291 and 8292 set for example). And I even found (and lost the reference to) a single chip implementation. I just don't know why I'd want to use them.
And I got no problem with you scavenging parts. Just because something is old doesn't mean that it should be saved. Excepting you and me of course.
COB - Chip On Board... surprised to see that in an HP box. Guess I'm wrong to think badly of it...
Intel 8291A GPIB Talker/Listener. Interesting chip.
Yes, it is similar to the Motorola 68488 GPIB talker/listener chip designed for use with the 6800 series microprocessors.
Together with the capacitor voltage of 50V the module with the number 4005 looks like an early switched 40V to 5V module working at maybe not much more than 20kHz.
No HP distructo hate but was wondering how many parts it's in now and will it take more space than the whole thing shoved in the corner... Project repurpose the Relays for say HF switching (probably still good for that) or maybe repurpose a whole relay card with say a Pi or Pico or ESP etc making a modern network attached relay controller ...could be sweet if you hav a use for some such ...maybe controlling the power to the individual bits of kit in your shop???
Keep it up I love this channel
I once spent $20 on one just for the power button to fix a 3457A
There are GPIB to USB adapters, if you're interested.
I've got one
I got dibs on the front panel button matrix.
No really. I need to find me and old HP relay matrix, for that board.
Speaking of spectrum analyzers, could you please tell me the firmware your Siglent came with? Please. Thanks
This was used to build custom ATE equipment, right?
yes, I don't automate much in the garage
Remote relay antenna switch project?
5 cards---- any studs sticking out?
😱 Sacrilege!!!
It's a 'Snuff' video !
I see a transformer test matrix,... oh well. So shame on you. ;-}