Author Topic: What did you buy today? Post your latest purchase!  (Read 1378006 times)

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Offline BravoV

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VICOR DC to DC converters
« Reply #6975 on: July 01, 2018, 02:48:35 pm »
VICOR high power density 50W/in3 DC to DC converters at 80-90% efficiency, some used some NOS, all tested, 3 bucks a piece.  :P

Two types : 325VDC to 7VDC at 200 Watt and 48VDC to 5VDC at 150 Watt.
« Last Edit: July 01, 2018, 02:56:05 pm by BravoV »
 

Offline daqq

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Re: What did you buy today? Post your latest purchase!
« Reply #6976 on: July 01, 2018, 04:19:48 pm »
Vintage pretties! 2x Galvanometer (from what I've been able to find +-20uA, will check later) with two built in switch contacts! The basis for a vintage regulator.
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Offline CZroe

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Re: What did you buy today? Post your latest purchase!
« Reply #6977 on: July 01, 2018, 05:05:11 pm »
Anyone know what this is?

Full res + more pics:
https://imgur.com/gallery/jRAOLyf

It has a 3-pin DIN in a 180° DIN5 arrangement and a blower with what look like TRRS contacts on the output tube. The cable is coiled and the housing is all metal. I’ve never seen one like it but could it be from a hot air station?

The TRRS contacts remind me of JBC style soldering iron tips so I hope no one is trying to do the same thing with hot air by building the heating elements into nozzles! It doesn’t make sense where nothing contacts it to directly sink heat.

So... anyone recognize this?
 

Offline CZroe

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Re: What did you buy today? Post your latest purchase!
« Reply #6978 on: July 01, 2018, 05:47:44 pm »
Anyone know what this is?
*snip*
Full res + more pics:
https://imgur.com/gallery/jRAOLyf

It has a 3-pin DIN in a 180° DIN5 arrangement and a blower with what look like TRRS contacts on the output tube. The cable is coiled and the housing is all metal. I’ve never seen one like it but could it be from a hot air station?

The TRRS contacts remind me of JBC style soldering iron tips so I hope no one is trying to do the same thing with hot air by building the heating elements into nozzles! It doesn’t make sense where nothing contacts it to directly sink heat.

So... anyone recognize this?



OK, it looks like the cable unplugs when you remove the back cover. Still haven’t been able to remove any screws to go deeper. Not sure what the adjustment it for.
« Last Edit: July 01, 2018, 08:40:49 pm by CZroe »
 

Offline bob225

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Re: What did you buy today? Post your latest purchase!
« Reply #6979 on: July 01, 2018, 06:32:12 pm »
either a vape device, a detector of some type ?  ::)
 

Offline bob225

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Re: What did you buy today? Post your latest purchase!
« Reply #6980 on: July 01, 2018, 06:52:22 pm »
Today at a boot sale (flea market) I picked up a pair of RJ45 crimpers for 50P and a tin of butane
 

Offline CZroe

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Re: What did you buy today? Post your latest purchase!
« Reply #6981 on: July 01, 2018, 08:43:11 pm »
either a vape device, a detector of some type ?  ::)
A vape of some kind was my first thought too but the cable tying it to something else doesn't make sense for that kind of portable device. It’s definitely got a blower of some kind in there.
 

Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #6982 on: July 02, 2018, 03:14:07 am »
An Asus 15.6" USB-C monitor. I realized I need to go to the library more, and using a laptop is really annoying since I'm used to at least 2 monitors. The new addition will be used with my laptop to make my workflow more natural. Now I need a Type-C hub to allow charging and using of external devices at the same time.
 

Offline senso

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Re: What did you buy today? Post your latest purchase!
« Reply #6983 on: July 02, 2018, 09:45:46 am »
Anyone know what this is?

Full res + more pics:
https://imgur.com/gallery/jRAOLyf

It has a 3-pin DIN in a 180° DIN5 arrangement and a blower with what look like TRRS contacts on the output tube. The cable is coiled and the housing is all metal. I’ve never seen one like it but could it be from a hot air station?

The TRRS contacts remind me of JBC style soldering iron tips so I hope no one is trying to do the same thing with hot air by building the heating elements into nozzles! It doesn’t make sense where nothing contacts it to directly sink heat.

So... anyone recognize this?

Eletric motor for dental handpieces:

https://www.ebay.com/itm/HOT-Dental-Lab-Equipment-E-Type-Micro-Motor-Electric-35-000-RPM-Motor-Handpiece/262375902132?epid=2254407896&hash=item3d16d28bb4:g:hKoAAOSwISRaes2n

Also called as contra angle on the ebay.
 

Offline lmester

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Re: What did you buy today? Post your latest purchase!
« Reply #6984 on: July 03, 2018, 03:59:06 am »
A $10 digital tachometer.

This tachometer works good. And, it's only $10.

I need to check the governor speed of my lawn mower engine. I decided to test the tachometer and verify it's accuracy.

First was the shaft speed of a four pole induction motor. 1780 RPM. That's reasonable. I then connected an LED to my waveform synthesizer and set it for 12345 RPM (205.75 Hz). You can see from the picture that it's right on.  My mower engine max speed is 3600 RPM. This tachometer should have no problem with that.





 

Online rsjsouza

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Re: What did you buy today? Post your latest purchase!
« Reply #6985 on: July 04, 2018, 12:29:28 am »
A couple od SCSI-1 controllers for my W-30 music workstation (Fujitsu MB89352AP). They look legit, but with eBay you never know for sure...
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 
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Offline julianhigginson

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Re: What did you buy today? Post your latest purchase!
« Reply #6986 on: July 04, 2018, 05:18:31 am »
cool! my friend had a W-30 back in the day. nice sampler.

What are you going to use for a SCSI drive?
 

Offline cat87

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Re: What did you buy today? Post your latest purchase!
« Reply #6987 on: July 04, 2018, 06:53:02 am »
Something old:  a Leroy lettering kit, in pretty good condition
Aaaand something new: some 12 way Grayhill rotary switches

Offline TerraHertz

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Re: What did you buy today? Post your latest purchase!
« Reply #6988 on: July 04, 2018, 06:53:49 am »
A Tektronix 422 'mini' oscilloscope. SN 101234
Bought for the princely sum of six carbon rods. WW2 searchlight carbon rods, so actually rather precious. They went to a good home.

Now I need:
 * The front panel grounding post knurled nut, missing.
 * Two black knobs for the vertical beam position pots. (someone had replaced them with non-original knobs.)
 * CRT protection plastic sheet. Missing.
 * The internal battery metalwork frame. Missing.  But I can make a replacement.
 * Service manual. Original print, not pdf.
 * Maybe the power cord, which has a very odd AC + DC 6 pin connector to the scope. But I think I will replace that with an IEC
   for mains, and a separate connector for DC power.

Plus get it going. Reported to be "Used to work, didn't last time he tried it."

Edit: The Cal-out point is at -2V DC. Looking at the schematics (from tek-wiki) that strongly suggests the -12V rail is dead, but the main switching reg is OK. Good.
« Last Edit: July 04, 2018, 11:13:45 am by TerraHertz »
Collecting old scopes, logic analyzers, and unfinished projects. http://everist.org
 

Online Cubdriver

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Re: What did you buy today? Post your latest purchase!
« Reply #6989 on: July 04, 2018, 08:12:18 am »
Very cool, THz!   :-+

Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline jonovid

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Re: What did you buy today? Post your latest purchase!
« Reply #6990 on: July 04, 2018, 10:01:21 am »
a Hantek DSO5102P
it will take a year or more, to figure out how to use it. in a few weeks time
« Last Edit: July 07, 2018, 04:03:34 am by jonovid »
Hobby of evil genius      basic knowledge of electronics
 

Online rsjsouza

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Re: What did you buy today? Post your latest purchase!
« Reply #6991 on: July 04, 2018, 02:57:56 pm »
cool! my friend had a W-30 back in the day. nice sampler.

What are you going to use for a SCSI drive?
I happen to have a couple of 80MB SCSI-1 drives that were still spinning a few years ago when I powered them on. Hopefully they are still alive.
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline TERRA Operative

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Re: What did you buy today? Post your latest purchase!
« Reply #6992 on: July 04, 2018, 03:42:33 pm »
A couple od SCSI-1 controllers for my W-30 music workstation (Fujitsu MB89352AP). They look legit, but with eBay you never know for sure...

I have one of these. I made a video on it too. They seem to work ok.

https://youtu.be/2uiByAnSS2k


As for my latest purchases, I got me a Hakko FM-206 rework station and an Amscope stereo microscope. (Trying to figure out how to attach a Raspberry Pi camera to it...)
I really gotta tidy my bench.......
« Last Edit: July 04, 2018, 03:49:28 pm by TERRA Operative »
Any circuit design must contain at least one part which is obsolete, two parts which are unobtainable, and three parts which are still under development.

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Offline Nominal Animal

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Re: What did you buy today? Post your latest purchase!
« Reply #6993 on: July 04, 2018, 05:45:47 pm »
Amscope stereo microscope. (Trying to figure out how to attach a Raspberry Pi camera to it...)
I tore down two Logitech USB webcams, and found out you can make "eyeballs" out of them, as the board is about 10-12mm behind the lens.  Of course, the resolution wasn't too good. However, IVPort Dual V2 and two 8Mpix camera modules, sounds even better. Good luck! If you get it working, do post some images.
 

Online dmills

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Re: What did you buy today? Post your latest purchase!
« Reply #6994 on: July 04, 2018, 05:54:57 pm »
A HP 4192A LF impedance analyser, been after one of these for a while.
Pretty much Gods own automatic impedance bridge for work in the audio to lowish RF region IMHO (5Hz - 13MHz, by which point the VNA is starting to look like a reasonable weapon).

There are more modern instruments (For proper Agilent money!), but for work a long way from 50 ohms (Where the VNA rules), these are pretty nice, especially if you hook up the GPIB so you can produce pretty plots in software.

Downside is that these things are not exactly compact, and weigh a ton, but they are proper no messing instruments.

Now just hope the thing powers up when it gets here....

Regards, Dan.
 

Offline Nominal Animal

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Re: What did you buy today? Post your latest purchase!
« Reply #6995 on: July 04, 2018, 06:16:22 pm »
A Hylkko 858D hot air rework station (by zshanding.cn).  The only one I could afford :D. I'll inspect the innards and connections before using, but I expect it'll serve me just fine.

 

Offline TERRA Operative

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Re: What did you buy today? Post your latest purchase!
« Reply #6996 on: July 04, 2018, 11:19:45 pm »
A HP 4192A LF impedance analyser, been after one of these for a while.

Wow, that is one chunky beast.... And I thought my 8903B Audio Analyzer was a bit chubby... :D
Any circuit design must contain at least one part which is obsolete, two parts which are unobtainable, and three parts which are still under development.

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Online dmills

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Re: What did you buy today? Post your latest purchase!
« Reply #6997 on: July 05, 2018, 01:50:58 pm »
Yea, but all the old HP kit was that way, the modern version is a lot more $ then I paid for it, and apart from integrating a LCD and plotting it does essentially nothing new.

Way I see it, this thing is not any more butch then my network analyser (of similar vintage).

GPIB and some python should make the thing useful for plotting caps and inductors a long way from 50 ohms (For which the VNA is a better weapon once you reach RF frequencies, but this thing goes down to 5Hz).

Regards, Dan.
 

Offline Evan.Cornell

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Re: What did you buy today? Post your latest purchase!
« Reply #6998 on: July 05, 2018, 02:34:00 pm »
Was that 4192A an eBay find? Any worries about out-of-cal? Or will you run through service manual routines after you get it?
 

Online dmills

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Re: What did you buy today? Post your latest purchase!
« Reply #6999 on: July 05, 2018, 02:51:38 pm »
I will probably dig out a few traceable passives and use them to do a check that the thing is reasonably close, if it is, then fine, if not well I have a service manual, and old HP is generally really serviceable, failing everything else it goes back on EBay as a 'parts only' job where I got it from.

This is not intended for metrology, but as a working tool for winding RF inductors and such (And maybe doing G-B plots of sonar transducers), so if it is within a few percent, that is good enough.

Short, open and measure something known in the range that I am interested in, not calibration, but reasonable verification, far more important most of the time.

First job, as always, is dig any RIFA class X or Y caps out of there.....
 
 


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