What did you buy today? Post your latest purchase!

[rx8pilot]

My next 2 year long project.....

An HP3577A network analyzer. Fingers crossed it has an obvious and easy problem that prevents startup.

That's verrah naace.  Does it do anything (besides weigh a ton or three)?  I don't think I ever found a service manual for that one, but also don't recall looking terribly hard for one, either.

-Pat

It was a couple of bucks and a drive through Los Angeles. It fails at the ROM check so far which prevents any further testing. Cosmetically it looks great, the power supplies are all working well. There is no evidence of bodged repair attempts. I have some new EEPROMs on the way and another forum member pointed out a site where someone is hosting images of the ROM. Pretty cool.

Started a thread for this repair.

https://www.eevblog.com/forum/testgear/old-hp-rom-fixesupdates-3577a-network-analyzer/

[Cubdriver]

Found another plug in for the 2x 5245Ls, 10 down, 4 to go 

Rob - are you sure that fits the 5245L?  That's the plug in that came in the 5360A computing counter I got a few years back (the source of the wire-wrapped backplane photo), and I could have sworn that one of the options for the 5360A was an adapter frame to let it utilize the slightly smaller 5245 series of plug ins...

I fear you might need to buy another counter to use that!     (It's all good, though - the 5360A sports nixies.)

-Pat

[Cubdriver]

It was a couple of bucks and a drive through Los Angeles. It fails at the ROM check so far which prevents any further testing. Cosmetically it looks great, the power supplies are all working well. There is no evidence of bodged repair attempts. I have some new EEPROMs on the way and another forum member pointed out a site where someone is hosting images of the ROM. Pretty cool.

Started a thread for this repair.

https://www.eevblog.com/forum/testgear/old-hp-rom-fixesupdates-3577a-network-analyzer/

Yeah, that was definitely worth a roll of the dice.  I just looked at your other thread, great news that the necessary images are out there.  I've never used a burner; should really get one and learn, and also get some of the needed chips to have on hand before they become unobtanium.

Mine came with 'free' shipping from the 'bay, and was packed relative to the shipping cost so the chassis got a bit buggered up in transit.  Built like a tank, though - it still works.  The only other real bother is that it was missing the knob, which seems to be a somewhat odd size.  It currently has an ugly generic black knob.

Good luck with the repair and I'll be watching the other thread with my fingers crossed looking for updates.

-Pat

[tooki]

I never realized how hard it is to take a clear picture of a circuit board.

Try putting them on a flatbed scanner instead!

[Jeroen3]

I never realized how hard it is to take a clear picture of a circuit board.

Try putting them on a flatbed scanner instead!

A flatbed scanner has a very narrow focus. Only works for empty boards. Instead, use a bit of zoom. Works on my iPhone nice.
Make sure you have enough light so your wobbly hands don't ruin it!

[capt bullshot]

I never realized how hard it is to take a clear picture of a circuit board.

Try putting them on a flatbed scanner instead!

A flatbed scanner has a very narrow focus. Only works for empty boards.

That depends. There are units (CIS) that have a very narrow focus, others can do 2...3 cm focus range, they make good scans of populated PCBs.

[McBryce]

Just install their app on your phone and it will alert you 15 minutes before the auction ends.

McBryce.

Gesendet von meinem Motorola DynaTAC 8000x mit Tapatalk

I'm not sure how that alert is implemented, but if it supposes a continuous internet connection, it's no more reliable than my own memory. I also think I'm not too fond of the idea of an eBay app and the things it might track, index and send home. Setting the existing alarm manually should do too.

No, it doesn't seem to need a continuous internet connection luckily. As far as tracking is concerned, it's not gathering any more than the web interface does.

McBryce.

[tooki]

I never realized how hard it is to take a clear picture of a circuit board.

Try putting them on a flatbed scanner instead!

A flatbed scanner has a very narrow focus. Only works for empty boards. Instead, use a bit of zoom. Works on my iPhone nice.
Make sure you have enough light so your wobbly hands don't ruin it!

These are unpopulated boards, they'll scan cleanly on any flatbed scanner.

And as capt bullshot said, CCD flatbed scanners have significant depth of field. (That's what I've got.) CIS scanners do not, and sadly they're the most common in all-in-ones. Still work for unpopulated PCBs.

[neo]

I bought two 10K lumen bulbs and three 4.2K lumen bulbs.
I can't speak for you guys but anything less than 2k lumens just kinda pisses me off. 

[neo]

Wow. For PCB shots, I usually use an 800lm flashlight, F8.0 and short shutter (1/500~1/160) with ISO100.
Well, I only shoot small PCBs, never bigger than 10cm*10cm, so 800lm serves me very well.
I almost never use a ring light, they never play well with reflective solder resist.

I don't use PCBs much, i do if i am going for more than a one off but every prototype or one off is perfboard with 38 AWG wire.

I often mistake my hair for it 

[rdl]

Where do you get these 10,000 lumen bulbs?
I have a Cree 100 watt equivalent bulb that's rated 1100 lumens. Are you sure you haven't misplaced a decimal point?

My LED shoplights from Home Depot are only 3400 lumens which is pretty bright considering they're only 3 ft. long.

I bought two 10K lumen bulbs and three 4.2K lumen bulbs.
I can't speak for you guys but anything less than 2k lumens just kinda pisses me off. 

[neo]

Where do you get these 10,000 lumen bulbs?
I have a Cree 100 watt equivalent bulb that's rated 1100 lumens. Are you sure you haven't misplaced a decimal point?

My LED shoplights from Home Depot are only 3400 lumens which is pretty bright considering they're only 3 ft. long.

https://www.1000bulbs.com/product/1293/Q-JD10365.html

https://www.1000bulbs.com/product/53879/Q-T10250WFR120V.html

[rdl]

Okay, that explains it. For some reason I though you were talking about standard Edison base LED bulbs. I guess there must be some reason you need that much light in that small size, otherwise LED makes more sense.

[neo]

Okay, that explains it. For some reason I though you were talking about standard Edison base LED bulbs. I guess there must be some reason you need that much light in that small size, otherwise LED makes more sense.

It is not size that matters, it is the cost. LEDs are cheaper to run but at my desired brightness their not only highway robbery their murder.
I like such a high brightness for a number of reasons, the size of the wires i work with being the largest motivation.

[NivagSwerdna]

Non-working door bell

[Rbastler]

Yesterday I got three AD588AD from China in the mail. All have been desoldered from somewhere.
Today I made two boards for two of them:

[Johnny10]

Rblaster, where did you get those extended reach probes ?

[Rbastler]

Rblaster, where did you get those extended reach probes ?

Probably from RS. But Im not sure. They're not mine. This foto was taken at the Elab. A lab for student by students, where Im a tutor.
I found a listing just now on Aliexpress: https://www.aliexpress.com/item/P5004-2PCS-Professional-full-insulation-fast-test-clamp-test-hook-flexible-probe-high-voltage-differential-test/32661571930.html

[Mr. Scram]

No, it doesn't seem to need a continuous internet connection luckily. As far as tracking is concerned, it's not gathering any more than the web interface does.

McBryce.

The main difference is that the web interface isn't continually running in the background.

[Mr. Scram]

After the fiasco with the cheap Chinese case marking my 87V, I've bought a Fluke C100 case. Supposedly it's compatible with the 87V, but it's sloshing around there in a way I'm not comfortable with. Images on the internet show it fitting more snugly in the smaller pocket when you remove the boot, but I don't want to take the boot off all the time. Leaving it off isn't an option due to the stand being integrated.

Good thing I got the case fairly cheaply. Guess I'm looking for case #3 now 

[Johnny10]

A B&K Model 177 VTVM
After replacing the 12AU7 tube worked fine.
Except for sticky needle.

[tautech]

TE Connectivity 5 pin panel mount socket to repair a vet mates endoscope. One pin broken. 
Very similar unit to this one:
http://www.portascopes.com/PVSM9150.htm
Unusual pin layout with a centre pin and the other 4 in a square pattern around it. Took a good while to find the correct socket. 
Drawing:
http://pdl.designspark.com/api/v1/manufacturers/53f31a629b4759f8698ba80b/part/53f330f69b4759f869bd0a7b/55bfbea08759c5ef5e8c50be/1.pdf

http://nz.rs-online.com/web/p/industrial-automation-circular-connectors/6693434/

[Mr.B]

Arrived this morning: Xiaomi case containing 24 Wiha bits.
https://www.gearbest.com/screwdriver-screwdriver-set/pp_696715.html
To go with my ES120 battery screwdriver that only ships with two very small bits.

[gamalot]

Arrived this morning: Xiaomi case containing 24 Wiha bits.
https://www.gearbest.com/screwdriver-screwdriver-set/pp_696715.html
To go with my ES120 battery screwdriver that only ships with two very small bits.

This is from China, they sell it on Taobao for 99CNY/set.

[Mr. Scram]

Arrived this morning: Xiaomi case containing 24 Wiha bits.
https://www.gearbest.com/screwdriver-screwdriver-set/pp_696715.html
To go with my ES120 battery screwdriver that only ships with two very small bits.

Is that actually Xiaomi or Wiha? It sounds like slapping a few brands with a good reputation on a box, especially considering the provenance. I could very well be wrong, though.

Regardless, it's a good looking set.