Man, this one has some serious aesthetics going on both on face plate and inside. Everything from layout and material to pristine condition like it was built months ago. And it is very useful too.
Picked one of these up at an estate sale a couple of months ago...the guy had apparently worked for Westinghouse and possibly TI, so there was quite a bit of test equipment in the sale. By the time I managed to get out there it was late on Sunday, so not much remained. But this thing was still there, sitting all alone on a folding table in a nearly empty bedroom. Price tag said $70, but Sunday = %50 off, so $35. But the cashier was swamped trying to get people out of the house. Asked if I was paying cash and I indicated I was. He said ' Give me $20 and we'll call it even.' Score. Weirdest and (at least initially) most alarming thing about it: the oven cycles on and off as long as it's plugged in. I guess the idea is that it'll keep the oven at warm standby so as to minimize the needed warmup time, but seeing this before I read the manual certainly made me think I had bought a really attractive doorstop...
Very nice power supply and looks really well made. The RD prefix resistors are metal film and the RW prefix are wire-wound. According to the manual Power Designs is the manufacturer but I doubt that. Thank you for sharing. Regards, David
What is the thing on the unit's left side panel? Looks like the sheet metal has been die stamped into a deep recess, and them some electronic thing mounted on the outer surface of the recess. Power transistor maybe? If so, it would be using the whole side panel as a heatsink, yet it would not protrude past the outline of the case.
Backlight see pages 118 - 119 in manual to increase timeout or disable timeout manual. heading: "Changing the auto power-off and backlight timeouts" Andy
I just pulled out my unit to have a look at why it died. Turns out mine is a model 2005 (ie. The older non-A version). Yours is definitely nicer, mine has a few less features. My problem was a blown fuse (why?). Also I had very dirty rotary voltage switches that were causing output voltage errors. I cleaned the switches, now is accurate to 3 digits again. My date codes on caps are 1964 era.Era. My wafer switch resistors are marked 0.1%.
Did they call those "Wiring Boards"? I know they were calling PCBs "Printed Wiring Boards" back in the 1970s, i wonder if that was legacy nomenclature.
Another piece of excellent looking equipment! I have a 5015T and it's rock solid. I don't have to cool thumb wheel adjustments like yours. I'm curious about the line input frequency though. 47-440 hz? It must have a special transformer to handle this. Thanks for sharing.
Hello, that's beautiful, I would like to know about one place - on my shelf 😁 This is the first time I've seen the resource from the inside and it's amazingly done, just wondering how they would do SMU with this technology today 🤣 Nice day 🙂 Tom
Maybe old school. But the magnitude of dedication in designing to achieve the precision certainly vouches due credibility. Yes, it was Americans who conquered the moon race, no doubt 👍❤️ De VU2RZA
Just throwing this out there but what makes you think the Fluke is that accurate? Also your test leads aren't exactly lab quality. Just nit-picking. I enjoyed the video and the power supply.
It's not a fluke. Agilent u1272a 4.5 digit meter. Quite accurate. The test leads I made of expensive test multistrand wire and gold plated Pomona test clips.
Man, this one has some serious aesthetics going on both on face plate and inside.
Everything from layout and material to pristine condition like it was built months ago.
And it is very useful too.
Who wouldn't want one of these cool units on their desks?
Only an Idiot.
I just love the look of the board and the way some of the components have been fitted.
Picked one of these up at an estate sale a couple of months ago...the guy had apparently worked for Westinghouse and possibly TI, so there was quite a bit of test equipment in the sale. By the time I managed to get out there it was late on Sunday, so not much remained. But this thing was still there, sitting all alone on a folding table in a nearly empty bedroom. Price tag said $70, but Sunday = %50 off, so $35. But the cashier was swamped trying to get people out of the house. Asked if I was paying cash and I indicated I was. He said ' Give me $20 and we'll call it even.' Score.
Weirdest and (at least initially) most alarming thing about it: the oven cycles on and off as long as it's plugged in. I guess the idea is that it'll keep the oven at warm standby so as to minimize the needed warmup time, but seeing this before I read the manual certainly made me think I had bought a really attractive doorstop...
I love the construction, very serviceable and built to last.
Who needs a printed circuit board, when you can have beauty, symmetry and function with a point-to-point layout?
So cool! I love vintage electronics…..Hand built stuff has such soul.
And an interesting backstory.
he tinkers with the nicest stuff!
Very cool point-to-point wiring!
Would really love to see the schematic for this. My guess is the 6 leaded package is a differential input long tail pair of transistors.
Very nice power supply and looks really well made. The RD prefix resistors are metal film and the RW prefix are wire-wound. According to the manual Power Designs is the manufacturer but I doubt that. Thank you for sharing. Regards, David
What is the thing on the unit's left side panel? Looks like the sheet metal has been die stamped into a deep recess, and them some electronic thing mounted on the outer surface of the recess. Power transistor maybe? If so, it would be using the whole side panel as a heatsink, yet it would not protrude past the outline of the case.
I show it: th-cam.com/video/vJtroVutpuA/w-d-xo.html
Backlight see pages 118 - 119 in manual to increase timeout or disable timeout manual.
heading: "Changing the auto power-off and backlight timeouts"
Andy
thanks
Awesome instrument...cheers.
I just pulled out my unit to have a look at why it died. Turns out mine is a model 2005 (ie. The older non-A version). Yours is definitely nicer, mine has a few less features. My problem was a blown fuse (why?). Also I had very dirty rotary voltage switches that were causing output voltage errors. I cleaned the switches, now is accurate to 3 digits again. My date codes on caps are 1964 era.Era. My wafer switch resistors are marked 0.1%.
What beautiful engineering, inside and out.
My bench is a nice place for it. LOL
Did they call those "Wiring Boards"? I know they were calling PCBs "Printed Wiring Boards" back in the 1970s, i wonder if that was legacy nomenclature.
Another piece of excellent looking equipment! I have a 5015T and it's rock solid. I don't have to cool thumb wheel adjustments like yours. I'm curious about the line input frequency though. 47-440 hz? It must have a special transformer to handle this. Thanks for sharing.
Hello, that's beautiful, I would like to know about one place - on my shelf 😁
This is the first time I've seen the resource from the inside and it's amazingly done, just wondering how they would do SMU with this technology today 🤣
Nice day 🙂 Tom
Beautiful!
What's on the left side of the case there? Couple of wires going into a dome looking area
Case is domed in to allow a to-3 transistor to fit
Maybe old school. But the magnitude of dedication in designing to achieve the precision certainly vouches due credibility.
Yes, it was Americans who conquered the moon race, no doubt 👍❤️
De VU2RZA
Those are turret boards.
Here the manual with schematics / parts list: manuals.repeater-builder.com/te-files/POWER%20DESIGNS/POWER%20DESIGNS%202005A%20Technical%20Data.pdf
Thank you !!
What is the "Pull to Set" on the current limit ?
Shorts the output. You set the trip current. Like many power supplies
An oven that's cool - must be defective
Just throwing this out there but what makes you think the Fluke is that accurate? Also your test leads aren't exactly lab quality. Just nit-picking. I enjoyed the video and the power supply.
It's not a fluke. Agilent u1272a 4.5 digit meter. Quite accurate. The test leads I made of expensive test multistrand wire and gold plated Pomona test clips.
@@IMSAIGuy Okay. Color me imprssed. Still a great video. Looking forwad to more.
xiexie！