Author Topic: What did you buy today? Post your latest purchase!  (Read 1368309 times)

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Offline bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #7075 on: July 17, 2018, 01:33:35 am »
That looks sweet, blueskull. You must share your impressions after driving it around the block a time or two.
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Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #7076 on: July 17, 2018, 01:45:02 am »
That looks sweet, blueskull. You must share your impressions after driving it around the block a time or two.

Definitely will. I don't have access to my GaN IPM at this moment, I will try having some fun with it tomorrow.
The scope does have a limited prove ground to earth voltage, which decreases over frequency, so I won't clamp it on switching node though. I guess it's a capacitive dissipation limit.
I may try that, but with limited pulse count to limit the power generation. Anyway, I will test it tomorrow.
 

Offline gamalot

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Re: What did you buy today? Post your latest purchase!
« Reply #7077 on: July 17, 2018, 11:56:07 am »
HP 01650-61608, Logitedh M238.  :)

 

Offline innkeeper

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Re: What did you buy today? Post your latest purchase!
« Reply #7078 on: July 17, 2018, 07:39:57 pm »
PROJECT!



That does look like it might need a little TLC - Bob would be proud.
Heil HM-10 Dual
I got some great help from Donna at Heil support on how they originally mounted the elements.
after some very nasty cleanup and reattaching the elements it works and looks great now.
after pics:


« Last Edit: July 17, 2018, 09:01:15 pm by innkeeper »
Hobbyist and a retired engineer and possibly a test equipment addict, though, searching for the equipment to test for that.
 
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Offline AF6LJ

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Re: What did you buy today? Post your latest purchase!
« Reply #7079 on: July 17, 2018, 08:19:01 pm »
Nicely done, looks great. :)
Sue AF6LJ
Test Equipment Addict, And Proud Of It.
 
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Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #7080 on: July 17, 2018, 08:23:43 pm »
//Edit: accidentally overwritten...
« Last Edit: July 18, 2018, 01:49:48 am by blueskull »
 

Offline bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #7081 on: July 17, 2018, 09:04:45 pm »
Nice sleuthing, blueskull. I've had success with Arrow overnight. Their search needs a major overhaul, though.
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Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #7082 on: July 17, 2018, 09:21:19 pm »
Nice sleuthing, blueskull. I've had success with Arrow overnight. Their search needs a major overhaul, though.

The most of the time was spent on getting it apart and setting it up and running while exposing the acquisition board. The actual cold spray/hot air/alcohol swab trick took 5 minutes, and finding the chip matching top marking and circuit took another hour.

The culprit is on the back side in approximately the red circle area, it's an ADR360 2.048V reference chip.



BTW, this scope is interesting. Unlike the others which mostly use a transformer to pass HF signal and an optocoupler or digital isolated ADC to pass LF signal, this scope uses differential caps to pass HF signal. The LF part is regular, a high linearity (closed loop, single emitter dual PD) optocoupler.

And this Keysight scope actually uses a LeCroy ADC!
 
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Offline Terry01

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Re: What did you buy today? Post your latest purchase!
« Reply #7083 on: July 17, 2018, 10:16:47 pm »
Just junk really for me,,,,, better than nowt I suppose   :=\

Sparks and Smoke means i'm nearly there!
 

Offline Terry01

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Re: What did you buy today? Post your latest purchase!
« Reply #7084 on: July 17, 2018, 10:25:06 pm »
PROJECT!



That does look like it might need a little TLC - Bob would be proud.
Heil HM-10 Dual
I got some great help from Donna at Heil support on how they originally mounted the elements.
after some very nasty cleanup and reattaching the elements it works and looks great now.
after pics:





You should be well proud for your efforts there buddy! It's went from looking done over to brand new with your clean up! Really nice job!  :-+
Sparks and Smoke means i'm nearly there!
 
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Offline bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #7085 on: July 17, 2018, 11:52:37 pm »
And this Keysight scope actually uses a LeCroy ADC!

Very interesting (that LeCroy has their own ADC and that Keysight is using it).
I TEA.
 

Offline innkeeper

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Re: What did you buy today? Post your latest purchase!
« Reply #7086 on: July 18, 2018, 12:56:18 am »
You should be well proud for your efforts there buddy! It's went from looking done over to brand new with your clean up! Really nice job!  :-+
Thanks, it is very satisfying to bring something back like that.
Hobbyist and a retired engineer and possibly a test equipment addict, though, searching for the equipment to test for that.
 

Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #7087 on: July 18, 2018, 01:50:02 am »
New chip ordered, hopefully Arrow will get the "free overnight" done right.

I ordered 3 part numbers from Arrow (2*Vref, 1*iMX6ULL-500MHz, 1*iMXULL-800MHz, totally $22 after SUMMER10 coupon), both from Reno warehouse, and they shipped out in 3 FedEx Overnight packages...
How can Arrow possibly be making money :-//.
 

Online beanflying

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Re: What did you buy today? Post your latest purchase!
« Reply #7088 on: July 18, 2018, 02:40:22 am »
Sold a few bits and pieces, got paid for a few jobs - spent all of it plus a bit and brought a Drone  >:D



There is rumors of a new DJI Pro 2 all round the net but this one was a very good price (only until the end of TODAY!) for those of us downunder given our value of the AUPeso to any other currency and the 10% Tax  https://www.ebay.com.au/itm/DJI-Mavic-Platinum-Pro-Fly-More-Combo-32gb-Sandisk-Extreme-Micro-SD/202346019746?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
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Offline bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #7089 on: July 18, 2018, 02:54:51 am »
New chip ordered, hopefully Arrow will get the "free overnight" done right.

I ordered 3 part numbers from Arrow (2*Vref, 1*iMX6ULL-500MHz, 1*iMXULL-800MHz, totally $22 after SUMMER10 coupon), both from Reno warehouse, and they shipped out in 3 FedEx Overnight packages...
How can Arrow possibly be making money :-//.

Yeah, I don't get it either. Most of the time my order gets split up like that. It's kind of crazy, but I figured their logistics must be optimized for very large orders, not small ones like we make. Beats me.
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Offline blackbird

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Re: What did you buy today? Post your latest purchase!
« Reply #7090 on: July 18, 2018, 08:57:44 am »
Just some extra tools:

- an adjustable torque wrench for SMA connectors. Claimed to be adjusted to 1 Nm, tested with an torque indicator and they did a good job.
- a crimp tool for terminal connectors.

 

Offline lukier

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Re: What did you buy today? Post your latest purchase!
« Reply #7091 on: July 18, 2018, 09:31:01 am »
And this Keysight scope actually uses a LeCroy ADC!

Wow, do you have a picture? That is an interesting curiosity, as I thought LeCroy makes their own ADCs (and sample memory ICs, MAMs, as well).

From this picture I only see e2v ADC, but e2v is rather unrelated. They got acquired by Teledyne last year, but it is the only thing they have in common with LeCroy I'd guess.
 

Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #7092 on: July 18, 2018, 04:36:30 pm »
And this Keysight scope actually uses a LeCroy ADC!

Wow, do you have a picture? That is an interesting curiosity, as I thought LeCroy makes their own ADCs (and sample memory ICs, MAMs, as well).

From this picture I only see e2v ADC, but e2v is rather unrelated. They got acquired by Teledyne last year, but it is the only thing they have in common with LeCroy I'd guess.

I didn't know they got recently acquired. I thought it was a long established LeCroy business unit.
 

Offline nanofrog

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Re: What did you buy today? Post your latest purchase!
« Reply #7093 on: July 18, 2018, 08:26:48 pm »
I didn't know they got recently acquired. I thought it was a long established LeCroy business unit.
Not exactly recent. Teledyne bought up LeCroy back in 2012.
 

Offline TerraHertz

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Re: What did you buy today? Post your latest purchase!
« Reply #7094 on: July 19, 2018, 03:25:02 am »
Much less delicate than microphones and scopes, but still electrical-related. Two socket drives, the 'small' one 36mm , and a 48mm extended length impact socket. Both 3/4" inch square drive. The 48 mm one I promptly cut in half with an angle grinder, because I need to 'extend' it quite a lot more. It will have a length of steel tube welded between the two parts.

These are for disassembling the big old 3-phase motor that came with my recently bought large lathe. I can't start on refurbishing the lathe yet, but I do have space to do the motor. It was made in the early 1950s, and looks like something out of a 1920s Amazing Stories (early SciFi) magazine illustration.

The shaft nuts that need removing are of course imperial sized, but I refuse to buy imperial wrenches. The metric ones fit well enough.
Collecting old scopes, logic analyzers, and unfinished projects. http://everist.org
 

Offline tautech

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Re: What did you buy today? Post your latest purchase!
« Reply #7095 on: July 19, 2018, 03:40:38 am »
Open frame (ventilated) 6 pole, yeah they made them big back then.

Gunna spigot the 2 socket parts THz ?
That'd keep alignment good and it looks better too.....like you know what you're doing.  :)
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Offline TerraHertz

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Re: What did you buy today? Post your latest purchase!
« Reply #7096 on: July 19, 2018, 04:26:10 am »
Open frame (ventilated) 6 pole, yeah they made them big back then.

Interestingly, that sheet metal mesh outside around the end vents, is spotwelded to the cast iron endpiece. I didn't know that was possible.

Quote
Gunna spigot the 2 socket parts THz ?
That'd keep alignment good and it looks better too.....like you know what you're doing.  :)

If I knew what I was doing, I'd probably know what you meant by 'spigot'.  :)
Do you mean cut a lip in the faces on a lathe, to center the extension tube accurately? And chamfer the weld seams? I will be doing that. Just haven't found/bought a suitable bit of tube yet, so don't know dimensions.
Alignment will be by clamping the parts in a bit of L section.

In the motor, the windings/pole piece seems to be fixed in the frame solely by heat-expanding the frame onto it. I think I need to separate them for a few reasons, so heating the frame up (without wrecking the old windings) will be a bit nail-biting.

Edit to add: The plate says the motor is Y-wound, and there is no Neutral. Any one know if this is a problem for variable frequency drives?

Btw, did anyone else catch that company name on the brass plaque?
"Lancashire Dynamo & Crypto Ltd England"

« Last Edit: July 19, 2018, 04:41:10 am by TerraHertz »
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Offline tautech

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Re: What did you buy today? Post your latest purchase!
« Reply #7097 on: July 19, 2018, 04:48:44 am »
Gunna spigot the 2 socket parts THz ?
That'd keep alignment good and it looks better too.....like you know what you're doing.  :)

If I knew what I was doing, I'd probably know what you meant by 'spigot'.  :)
Do you mean cut a lip in the faces on a lathe, to center the extension tube accurately? And chamfer the weld seams? I will be doing that. Just haven't found/bought a suitable bit of tube yet, so don't know dimensions.
Alignment will be by clamping the parts in a bit of L section.
Yeah, pretty much exactly that. Some ordinary 2" black steam tube or the bit thinner wall galv water pipe should do the job. Either is just over 2" ID with 2" indicating nominal ID not OD.

Quote
In the motor, the windings/pole piece seems to be fixed in the frame solely by heat-expanding the frame onto it. I think I need to separate them for a few reasons, so heating the frame up (without wrecking the old windings) will be a bit nail-biting.
I'd resist trying to separate them after being shrunk on. What's making you think you need to ?


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Offline TerraHertz

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Re: What did you buy today? Post your latest purchase!
« Reply #7098 on: July 19, 2018, 04:59:20 am »
I'd resist trying to separate them after being shrunk on. What's making you think you need to ?

Wanting to sandblast the frame. Also access to punch out the pins securing the brass plaque, from the inside.
Still weighing the pros and cons. Needing to heat the entire frame circumference evenly, to avoid risk of cracking the cast iron, being one issue. Doing it fast enough to not significantly heat the pole piece and aged winding insulation, another.
Collecting old scopes, logic analyzers, and unfinished projects. http://everist.org
 

Offline tautech

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Re: What did you buy today? Post your latest purchase!
« Reply #7099 on: July 19, 2018, 05:12:30 am »
I'd resist trying to separate them after being shrunk on. What's making you think you need to ?

Wanting to sandblast the frame. Also access to punch out the pins securing the brass plaque, from the inside.
Still weighing the pros and cons. Needing to heat the entire frame circumference evenly, to avoid risk of cracking the cast iron, being one issue. Doing it fast enough to not significantly heat the pole piece and aged winding insulation, another.
Being cast, it's not like it will rust away anytime soon like if it was steel. Hit it carefully with a flap wheel or a cup brush, smear some grease on the brass plaque and slop/spray some paint for decoration on as like I said cast ain't gunna rust away anytime soon.

For the socket tube, another thought.....diff axle tubes can be fairly thick wall tube if you have some of that sort of scrap lying about.
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