Author Topic: What did you buy today? Post your latest purchase!  (Read 1217125 times)

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Offline boffin

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Re: What did you buy today? Post your latest purchase!
« Reply #8200 on: February 02, 2019, 08:15:59 am »
Just scored an old VT220 from the office.



Oh, and is someone missing a stapler?

Nice terminal!  I would love to have one just to plug into my linux box and play like it's 1992.

Holy grail for me right now: I want a red/orange plasma display GRiD systems laptop from the 80's. Second option, I'd like a yellow EL display GRiD  Compass like flew on the Space Shuttle in the mid 80's.

I would LOVE to have a full size monochrome red/orange plasma display.  Why?  I've just always loved the appearance.

I'm going to pull +5 out of it to drive a RPi ZeroW.  Haven't decided if I'll build the zero internally, but I might.
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Offline shakalnokturn

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Re: What did you buy today? Post your latest purchase!
« Reply #8201 on: February 03, 2019, 02:07:30 am »
Sold as fully working, came with battery contamination / corrosion, higher  \$\Omega\$ ranges false and 10's of mV DC offset. Luckily it was cheap enough to be worth it even after spending 3 hours decontaminating PCB and reworking tracks / vias. Appears to be saved and is only waiting a new battery holder now.
It will be fed lithium cells only!

 
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Offline tsman

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Re: What did you buy today? Post your latest purchase!
« Reply #8202 on: February 03, 2019, 02:30:41 am »
It will be fed lithium cells only!
This may not be a good idea. Fresh Lithium cells start off at 1.8V and can cause problems in low current applications because the voltage doesn't immediately droop to 1.5V. Dave's 121GW shouldn't be used with fresh Lithium cells because of this. Your one might be similar. Hard to tell though without spending a lot of time reverse engineering it.

Some low self discharge NiMH batteries like the Eneloops or the rebranded Eneloops like the IKEA LADDA are a better choice IMO and cheaper.
 

Offline glarsson

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Re: What did you buy today? Post your latest purchase!
« Reply #8203 on: February 03, 2019, 03:33:48 am »
Received a box containing two Agilent 66319D, bought for almost nothing. I bought them unseen for use as spare parts for the 66319D I already have, but now I realize that I can't use them for that.

The first one I unpacked is missing a foot and the knob, have problems powering on sometimes and needs calibration. Probably easy to fix.

The second one is squeaky clean both outside and inside and seems to work just fine.

So instead of spare parts I will soon have three working 66319D. That was not the plan.
 

Online bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #8204 on: February 03, 2019, 05:50:46 am »
Just scored an old VT220 from the office.



Oh, and is someone missing a stapler?

Nice terminal!  I would love to have one just to plug into my linux box and play like it's 1992.

I'm going to pull +5 out of it to drive a RPi ZeroW.  Haven't decided if I'll build the zero internally, but I might.

Looking forward to seeing how it turns out. I have a Wyse 30+ terminal that I can't decide what I want to use it for.
Life is better under the TEA. ♪♩♫ Under the TEA. ♩♫
 

Offline tooki

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Re: What did you buy today? Post your latest purchase!
« Reply #8205 on: February 03, 2019, 07:28:30 am »
Mastech, or somebody, used to make a small 10MHz analog scope with CRT that had the same vertical format design. I almost bought one because I had limited space at that time. That was around 15 years ago though. I doubt it's still made.
You mean like these ST16A scopes that constantly pollute the local auction site at silly prices?
« Last Edit: February 03, 2019, 07:30:47 am by tooki »
 

Offline TERRA Operative

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Re: What did you buy today? Post your latest purchase!
« Reply #8206 on: February 07, 2019, 03:35:01 am »
Got a delivery of another POS boat anchor to restore. :D

Tektronix 577 Curve Tracer with the 177 test fixture.
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Offline rdl

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Re: What did you buy today? Post your latest purchase!
« Reply #8207 on: February 07, 2019, 06:33:31 am »
That does look a lot like it, vertical format and all, but it's hard to say if it's the exact one.

Mastech, or somebody, used to make a small 10MHz analog scope with CRT that had the same vertical format design. I almost bought one because I had limited space at that time. That was around 15 years ago though. I doubt it's still made.
You mean like these ST16A scopes that constantly pollute the local auction site at silly prices?
 

Offline blackbird

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Re: What did you buy today? Post your latest purchase!
« Reply #8208 on: February 07, 2019, 08:18:38 am »
Holy grail for me right now: I want a red/orange plasma display GRiD systems laptop from the 80's. Second option, I'd like a yellow EL display GRiD  Compass like flew on the Space Shuttle in the mid 80's.

It's not a plasma GRiD but still a nice one, the Gridcase 1530. Got it from my father, don't know how he got this one. The dark spots in the center of the pictures are caused by my phone (dust in the camera).
The laptop is functional if I can manage to reset the startup password. Disconneting the battery did not work  :(
 
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Online bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #8209 on: February 07, 2019, 03:00:55 pm »
Got a delivery of another POS boat anchor to restore. :D

Tektronix 577 Curve Tracer with the 177 test fixture.

You get some really nice POS. :-+
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Offline salvagedcircuitry

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Re: What did you buy today? Post your latest purchase!
« Reply #8210 on: February 08, 2019, 06:14:57 pm »
Holy grail for me right now: I want a red/orange plasma display GRiD systems laptop from the 80's. Second option, I'd like a yellow EL display GRiD  Compass like flew on the Space Shuttle in the mid 80's.

It's not a plasma GRiD but still a nice one, the Gridcase 1530. Got it from my father, don't know how he got this one. The dark spots in the center of the pictures are caused by my phone (dust in the camera).
The laptop is functional if I can manage to reset the startup password. Disconneting the battery did not work  :(

Try pulling the bios/cmos battery. However, it's likely dead this long after production. :-DD
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Offline shakalnokturn

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Re: What did you buy today? Post your latest purchase!
« Reply #8211 on: February 08, 2019, 09:17:37 pm »
It will be fed lithium cells only!
This may not be a good idea. Fresh Lithium cells start off at 1.8V and can cause problems in low current applications because the voltage doesn't immediately droop to 1.5V. Dave's 121GW shouldn't be used with fresh Lithium cells because of this. Your one might be similar. Hard to tell though without spending a lot of time reverse engineering it.

Some low self discharge NiMH batteries like the Eneloops or the rebranded Eneloops like the IKEA LADDA are a better choice IMO and cheaper.

Thanks for the tip, I wasn't aware of this kind of problem. I have tried it on Lithiums and not found any issues, a MAX856 is used as step-up to 5V in this meter.
The DMM's internal battery measurement reports the (new) Lithium cells as 3.3V, that's lower than the 3.6V measured externally.
 

Offline FrankBuss

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Re: What did you buy today? Post your latest purchase!
« Reply #8212 on: February 09, 2019, 02:53:26 am »
Got a grinder, "Proxxon Tellerschleifgerät TG 125/E". Nice little tool.

So Long, and Thanks for All the Fish
 

Offline tooki

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Re: What did you buy today? Post your latest purchase!
« Reply #8213 on: February 10, 2019, 11:36:08 am »
*disc sander. A grinder is the thing with hard discs (like a Winkelschleifer) or stone (like the grinders for sharpening blades).

How do you like proxxon’s other tools, like the sander? So far I just have a proxxon “dremel” (IBS/E and the MB200 drill stand).
 

Online maginnovision

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Re: What did you buy today? Post your latest purchase!
« Reply #8214 on: February 10, 2019, 05:29:14 pm »
Bought an R&S NGPE supply. Didn't work because some caps were shorted, and possibly bad regulators. Because of that the +15V rail was low and unit thought it was pulling about 50A at all times. In the process of fixing it by replacing every tantalum capacitor and all of the +15V regulators. Also had no mains cable so I had to find the right connector(4 pin circular amphenol connector) and make a cable. The amps panel meter is cracked but I can't seem to find any part number or a similar style. I have every board out of the unit and all the tantalums removed and all ready to be replaced. Parts don't come for a couple days though. After that hopefully it'll work.
 

Offline DC1MC

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Re: What did you buy today? Post your latest purchase!
« Reply #8215 on: February 10, 2019, 07:14:47 pm »
Bought an R&S NGPE supply. Didn't work because some caps were shorted, and possibly bad regulators. Because of that the +15V rail was low and unit thought it was pulling about 50A at all times. In the process of fixing it by replacing every tantalum capacitor and all of the +15V regulators. Also had no mains cable so I had to find the right connector(4 pin circular amphenol connector) and make a cable. The amps panel meter is cracked but I can't seem to find any part number or a similar style. I have every board out of the unit and all the tantalums removed and all ready to be replaced. Parts don't come for a couple days though. After that hopefully it'll work.

Totally get rid of the two blue elcos on the middle boards, I never seen a case when they don't create problems.

 DC1MC
 

Online maginnovision

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Re: What did you buy today? Post your latest purchase!
« Reply #8216 on: February 10, 2019, 07:49:30 pm »
Bought an R&S NGPE supply. Didn't work because some caps were shorted, and possibly bad regulators. Because of that the +15V rail was low and unit thought it was pulling about 50A at all times. In the process of fixing it by replacing every tantalum capacitor and all of the +15V regulators. Also had no mains cable so I had to find the right connector(4 pin circular amphenol connector) and make a cable. The amps panel meter is cracked but I can't seem to find any part number or a similar style. I have every board out of the unit and all the tantalums removed and all ready to be replaced. Parts don't come for a couple days though. After that hopefully it'll work.

Totally get rid of the two blue elcos on the middle boards, I never seen a case when they don't create problems.

 DC1MC

What sort of problems? The power unit also uses some Philips HP caps but much higher voltage ratings. The ones on the smaller boards are for the split +15 / -15 rails.
 

Offline Jeroen3

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Re: What did you buy today? Post your latest purchase!
« Reply #8217 on: February 11, 2019, 04:39:56 am »
I bought this. And it's really useful doing things in my first house I also bought recently.

My new house will have a 3.5x3.5M attic room, space for an electronics room!
 

Online beanflying

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Re: What did you buy today? Post your latest purchase!
« Reply #8218 on: February 11, 2019, 01:30:15 pm »
I was going to convert this HP Battery module to LiPo's but decided to swap out the 2500 long dead NiCads for 'allegedly' 10000mAh NiMh instead to keep the other mods to a minimum. Under $4 USD each delivered on special so also a chunk cheaper than LiPo's.

I will be testing your claims Eastlakes Electronics so you had better not have used  :bullshit: marketing or I will claim on your evilbay/paypal butt and leave appropriate feedback  >:D

Time to breakout the vinegar and water to clean up the crusty crystals on the chassis.


« Last Edit: February 11, 2019, 08:20:03 pm by beanflying »
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Offline FrankBuss

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Re: What did you buy today? Post your latest purchase!
« Reply #8219 on: February 11, 2019, 08:18:21 pm »
How do you like proxxon’s other tools, like the sander? So far I just have a proxxon “dremel” (IBS/E and the MB200 drill stand).

Can't read the type number anymore, it's scratched, but I have a small dremel from Proxxon as well with a stand. Works pretty good for drilling small holes (a few millimeters) or cutting traces. But for bigger holes I need my drill press.
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Offline TERRA Operative

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Re: What did you buy today? Post your latest purchase!
« Reply #8220 on: February 12, 2019, 12:17:15 am »
Picked up yet another portable mini TV from Akihabara, along with a 'Corning' brand 10MHz crystal oscillator.

Having a bit of trouble finding info on it though, it's part number MC833X4-006W and cross references to HP part number 1813-0644.

Anyone got any ideas how to find a pinout for this thing?
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 Fludo

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Re: What did you buy today? Post your latest purchase!
« Reply #8221 on: February 12, 2019, 12:19:41 am »
I bought an Advantest R3131A Spectrum Analyzer 9kHz - 3GHz  off of EBay for $165 shipped. Doesn't have TG option but the price was right.
I had the seller try and run self test but he reported the keyboard was not responding to inputs.  Hopefully I can use GPIB adapter and labview to get it responding remotely.  In addition, I bought a few attenuators and Type N - bnc adapters to test it, but have trouble finding a cheap 3GHz source to test it with.  My Wavetek 288 function gen goes up to 20MHz with AM/FM and will be fun to play with.

 
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Offline Terry01

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Re: What did you buy today? Post your latest purchase!
« Reply #8222 on: February 12, 2019, 05:13:14 am »
I got 1 of these I am happy to report...

I've been looking for one in decent nick at the right price for a while now. This 1 looks ok in the photos but we'll see when it arrives.

« Last Edit: February 12, 2019, 05:19:57 am by Terry01 »
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Offline TerraHertz

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Re: What did you buy today? Post your latest purchase!
« Reply #8223 on: February 12, 2019, 08:48:54 am »
I was going to convert this HP Battery module to LiPo's but decided to swap out the 2500 long dead NiCads for 'allegedly' 10000mAh NiMh instead to keep the other mods to a minimum.

I was going to do the same thing to an instrument that had a lot of dead NiCads. Bought the NiMh replacements. Then reading up on characteristics (which I should have done before buying), discovered that NiMh do not like constant trickle charge. It apparently ruins them. The instrument used simple trickle charge. Changing that to implement the correct charge profile for NiMh wasn't feasible. So I had wasted a significant amount of money.
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Online beanflying

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Re: What did you buy today? Post your latest purchase!
« Reply #8224 on: February 12, 2019, 08:58:19 am »
I was going to convert this HP Battery module to LiPo's but decided to swap out the 2500 long dead NiCads for 'allegedly' 10000mAh NiMh instead to keep the other mods to a minimum.

I was going to do the same thing to an instrument that had a lot of dead NiCads. Bought the NiMh replacements. Then reading up on characteristics (which I should have done before buying), discovered that NiMh do not like constant trickle charge. It apparently ruins them. The instrument used simple trickle charge. Changing that to implement the correct charge profile for NiMh wasn't feasible. So I had wasted a significant amount of money.

I will still be swapping out the charge circuitry on this as it will be on 24/7 under load with the batteries becoming a UPS of sorts. More fuss to protect the LiPo's and also deal with the voltage change in this case.
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