Author Topic: What did you buy today? Post your latest purchase! (Read 3087248 times)

vk6zgo · « **Reply #6850 on:** July 21, 2018, 01:43:13 pm »

Quote from: jmelson on July 20, 2018, 08:54:24 pm

Quote from: TerraHertz on July 20, 2018, 07:01:41 am
Oh. Good point. Never having used a VFD before, I had assumed they'd all (mostly?) use HF chopping with a filter, for reasonably sine-like outputs. Are there any like that?
Nope, they all put ~400 V square waves into the motor, with pretty sharp edges. Most 230/460 V motors handle this pretty well. If the motor was specifically wound with insulation only good for 230 V or so, that could be a problem.

You can add series inductors on the motor side of the VFD to round off the sharp edges.

Jon

As an old Oz motor, it will have been desired for 240v Phase to Neutral (415 Phase to Phase).
The insulation may be quite a lot better than that, as they were probably also sold in WA, which for many years had a 250/440v system.

HighVoltage · « **Reply #6851 on:** July 21, 2018, 05:53:54 pm »

Quote from: Kjelt on July 21, 2018, 10:23:06 am

An extra Bernstein clamp/helping hand, this time chose an ESD safe version

I was not aware that Bernstein made them ESD safe.
And in black !
Thanks for showing.

They are the best working vice ever!

Fsck · « **Reply #6852 on:** July 21, 2018, 05:55:23 pm »

bought a tv cart, this'll give me 5 monitors and 2 laptops as screen space.

Kjelt · « **Reply #6853 on:** July 21, 2018, 08:25:42 pm »

Quote from: HighVoltage on July 21, 2018, 05:53:54 pm

Quote from: Kjelt on July 21, 2018, 10:23:06 am
An extra Bernstein clamp/helping hand, this time chose an ESD safe version

I was not aware that Bernstein made them ESD safe.
And in black !
Thanks for showing.

They are the best working vice ever!

Conrad has a special it is even cheaper than the normal one at the moment.

Messtechniker · « **Reply #6854 on:** July 22, 2018, 07:42:21 am »

My Bernstein "Spannfix" after 40 years of service.
Just to let you "Spannfix" newcomers know what its
going to look like in time.

An expensive but very worthwile investment.

nanofrog · « **Reply #6855 on:** July 22, 2018, 02:07:59 pm »

Wouldn't take much to make it look near new again.

Gyro · « **Reply #6856 on:** July 22, 2018, 02:58:42 pm »

No, some of TerraHertz's Hammerite ought to do the trick.

nanofrog · « **Reply #6857 on:** July 22, 2018, 04:51:57 pm »

Quote from: Gyro on July 22, 2018, 02:58:42 pm

No, some of TerraHertz's Hammerite ought to do the trick.

I actually used black hammered finish on my bench & shelving frame (steel).

It can be had under the Rust-Oleum label here (Hammerite isn't available in NA).

Perhaps it should be relabeled as TerraHertz brand though, as I suspect there'd be added value (suspect he's the type to paint the item as a bonus). Toss in his favorite food & fuzzy logic generating beverage, and it'd make for a nice day in the shop. Paint or not.

Richard Crowley · « **Reply #6858 on:** July 22, 2018, 07:25:39 pm »

Quote from: nanofrog on July 22, 2018, 04:51:57 pm

(Hammerite isn't available in NA).

"Hammerite" appears to be the UK/EU brand name while in NA, it was called "Hammertone"
The generic name (at least according to Wikipedia) is "hammer paint"
As @nanofrog observed, Rustoleum is selling this paint in several colors, although not that lovely pastel green color shown by @TerraHertz

It almost looks like "no-see-um green"
http://disneydose.com/disneyland-psychology/#axzz5M0sakNhU
https://www.apartmenttherapy.com/paint-tricks-use-disneys-go-away-green-219276

tautech · « **Reply #6859 on:** July 23, 2018, 04:43:02 am »

Out and about day so came home with a few bits and bobs.
PVC plumbing HW for the vertical tube mount that will house a new J-Pole antenna for a 500m RC RF link.
For above and ex Jaycar some BNC crimp on's for the 50 $\$\Omega\$$ coax feeder.
Coax crimp pliers.
Coax stripper.
N-SMA adapter.

New SD card for camera.
USB3 8Gb stick.
Panasonic batteries, the ones you're always short of, AA and AAA.
3V lithium for the sons rangefinder.

Zucca · « **Reply #6860 on:** July 23, 2018, 08:54:09 am »

Messtechniker, HighVoltage, Kjelt

I hate you all, I just bought a Spannfix ESD from conrad.de

Kjelt · « **Reply #6861 on:** July 23, 2018, 09:19:07 am »

Quote from: zucca on July 23, 2018, 08:54:09 am

Messtechniker, HighVoltage, Kjelt
I hate you all, I just bought a Spannfix ESD from conrad.de

you're welcome.

The good thing I noticed if you clamp it on your ESD mat you don't need the extra cable, it just conducts enough through the mat, at least with my mat I measure a bit more than 1Mohms to earth (mat had 1Mohms to earth).

VK5RC · « **Reply #6862 on:** July 23, 2018, 10:58:28 am »

My Amateur Radio Club, the North East Radio Club, ordered 10 of the QCX transceiver Kit from QRP labs, they arrived today. A really nice single band CW only tranceiver that uses I/Q for mixing, not an NE602 and is fully digital synthesised/digital display. USD$49!! Happy customer only.
Hopefully we can get some of the more inert members building and try a little morse code

tooki · « **Reply #6863 on:** July 23, 2018, 12:38:34 pm »

Quote from: Kjelt on July 21, 2018, 10:23:06 am

An extra Bernstein clamp/helping hand, this time chose an ESD safe version

Looks awesome!

(FYI, that’s called a “vise” in English. A “helping hands” are the dinky things with alligator clips, e.g. for holding wires. And clamps are the freestanding things you use to e.g. clamp together two pieces of wood while they glue; that is, a clamp is put onto the workpiece, whereas a vise holds the workpiece.)

What is the use case for an ESD vise*? I would think it’s not convenient for holding PCBs.

*Other than the Panavise vises designed specifically as PCB holders.

Kjelt · « **Reply #6864 on:** July 23, 2018, 01:10:51 pm »

Quote from: tooki on July 23, 2018, 12:38:34 pm

What is the use case for an ESD vise*? I would think it’s not convenient for holding PCBs.

Depends if you have 4mm or more room on a side of the pcb, that is enough to hold it steady while soldering, drilling, cleaning, scrubbing, removing solderlacquer etc.
Also I use it for everything else you normally would use those helpless helping hands for: holding wires, connectors, etc.

Then it has some extra functionality not found in helping hands:
- Pressure close flatband headers, you know the connectors on flatband you parallel have to apply pressure to.
- clamp your plastick or alu box (if smaller than the clamping distance or else you have to clamp on one of the sides) for drilling holes or perform other mechanical operations.

There is a special pcb holder from Bernstein if you need it, but I don't. When I work under the stereomicroscope I use a flat vise.
This is my second Bernstein, it is one of the tools I could not work without. If it is in your way you unscrew two turns and it is loose (4 seconds) and can be put anywhere, to mount same procedure.

rsjsouza · « **Reply #6865 on:** July 24, 2018, 09:00:23 pm »

I got some heavy iron on a bargain...

Twin 480VA 12V fully potted transformers to power up some beefy power supply project I have in mind.

BravoV · « **Reply #6866 on:** July 25, 2018, 02:21:02 am »

Quote from: rsjsouza on July 24, 2018, 09:00:23 pm

I got some heavy iron on a bargain...

Twin 480VA 12V fully potted transformers to power up some beefy power supply project I have in mind.

Great score !

Since they're twins, you can even turn them into an ad-hoc isolation transformer if needed in emergency.

rsjsouza · « **Reply #6867 on:** July 25, 2018, 02:26:17 pm »

Quote from: BravoV on July 25, 2018, 02:21:02 am

Quote from: rsjsouza on July 24, 2018, 09:00:23 pm
I got some heavy iron on a bargain...

Twin 480VA 12V fully potted transformers to power up some beefy power supply project I have in mind.

Great score !

Since they're twins, you can even turn them into an ad-hoc isolation transformer if needed in emergency.

Yeah, good idea. I will keep that in mind if the need arises.

KaneTW · « **Reply #6868 on:** July 25, 2018, 05:06:35 pm »

Bought a R&S HMC8043. Was oscillating between that and a HMP2030/4030, decided to go with the HMC for now.

Fortran · « **Reply #6869 on:** July 25, 2018, 05:53:36 pm »

A house with infinite (but useless) space, and an immortal (but sinister) car.
Close to work. Three ~~garages~~ labs.

I'm pretty sure Murphy is lurking about!

Pirateguy · « **Reply #6870 on:** July 25, 2018, 08:51:11 pm »

eBay auction: #https://www.ebay.com/itm/15KV-High-Frequency-Inverter-Generator-High-Voltage-Electric-Ignitor-Coil-Arc/382475346892?ssPageName=STRK%3AMEBIDX%3AIT&var=651230490166&_trksid=p2057872.m2749.l2649

used it to make: (9v battery shown for scale)

bsudbrink · « **Reply #6871 on:** July 25, 2018, 09:13:11 pm »

Hi Pirateguy,

How are you powering that? Bench supply? What is the gap at the base of the ladder?

Pirateguy · « **Reply #6872 on:** July 25, 2018, 10:07:11 pm »

power is coming from an improvised (pending arrival of parts) bench supply made out of a switching wall wart.

the gaps is appr. 2mm at the shortest distance.

Zucca · « **Reply #6873 on:** July 25, 2018, 10:15:16 pm »

Quote from: zucca on July 23, 2018, 08:54:09 am

Messtechniker, HighVoltage, Kjelt

I hate you all, I just bought a Spannfix ESD from conrad.de

It is arrived, now I love all of you.
I should have bought it 10 years ago.

Z

Johnny10 · « **Reply #6874 on:** July 25, 2018, 10:44:03 pm »

Tektronix 577 Curve Tracer!

I almost have the whole set... 575, 576, 577.

Just picked it up !


EEVblog Main Site	EEVblog on Youtube	EEVblog on Twitter	EEVblog on Facebook	EEVblog on Odysee

Author Topic: What did you buy today? Post your latest purchase! (Read 3087248 times)

Share me