Author Topic: What did you buy today? Post your latest purchase!  (Read 2754432 times)

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Offline vk6zgo

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Re: What did you buy today? Post your latest purchase!
« Reply #6850 on: July 21, 2018, 01:43:13 pm »
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.
 

Offline HighVoltage

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Re: What did you buy today? Post your latest purchase!
« Reply #6851 on: July 21, 2018, 05:53:54 pm »
An extra Bernstein clamp/helping hand, this time chose an ESD safe version  8)

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

They are the best working vice ever!


There are 3 kinds of people in this world, those who can count and those who can not.
 

Offline Fsck

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Re: What did you buy today? Post your latest purchase!
« 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.
"This is a one line proof...if we start sufficiently far to the left."
 

Offline Kjelt

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Re: What did you buy today? Post your latest purchase!
« Reply #6853 on: July 21, 2018, 08:25:42 pm »
An extra Bernstein clamp/helping hand, this time chose an ESD safe version  8)

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.
 

Offline Messtechniker

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Re: What did you buy today? Post your latest purchase!
« 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. 8)
Agilent 34465A, Siglent SDG 2042X, Hameg HMO1022, R&S HMC 8043, Peaktech 2025A, Voltcraft VC 940, M-Audio Audiophile 192, R&S Psophometer UPGR, 3 Transistor Testers, DL4JAL Transistor Curve Tracer, UT622E LCR meter
 

Offline nanofrog

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Re: What did you buy today? Post your latest purchase!
« Reply #6855 on: July 22, 2018, 02:07:59 pm »
Wouldn't take much to make it look near new again.  :)
 

Offline Gyro

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Re: What did you buy today? Post your latest purchase!
« Reply #6856 on: July 22, 2018, 02:58:42 pm »
No, some of TerraHertz's Hammerite ought to do the trick.  ;)

Best Regards, Chris
 

Offline nanofrog

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Re: What did you buy today? Post your latest purchase!
« Reply #6857 on: July 22, 2018, 04:51:57 pm »
No, some of TerraHertz's Hammerite ought to do the trick.  ;)


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

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.  ;D
 

Offline Richard Crowley

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Re: What did you buy today? Post your latest purchase!
« Reply #6858 on: July 22, 2018, 07:25:39 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

 
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Online tautech

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Re: What did you buy today? Post your latest purchase!
« 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.
Avid Rabid Hobbyist
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Online Zucca

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Re: What did you buy today? Post your latest purchase!
« 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

 |O
Can't know what you don't love. St. Augustine
Can't love what you don't know. Zucca
 

Offline Kjelt

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Re: What did you buy today? Post your latest purchase!
« Reply #6861 on: July 23, 2018, 09:19:07 am »
Messtechniker, HighVoltage, Kjelt
I hate you all, I just bought a Spannfix ESD from conrad.de
 |O 
;D 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).
 

Offline VK5RC

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Re: What did you buy today? Post your latest purchase!
« 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 :-+
Whoah! Watch where that landed we might need it later.
 

Offline tooki

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Re: What did you buy today? Post your latest purchase!
« Reply #6863 on: July 23, 2018, 12:38:34 pm »
An extra Bernstein clamp/helping hand, this time chose an ESD safe version  8)
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.
 

Offline Kjelt

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Re: What did you buy today? Post your latest purchase!
« Reply #6864 on: July 23, 2018, 01:10:51 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.
« Last Edit: July 23, 2018, 01:13:41 pm by Kjelt »
 
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Offline rsjsouza

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Re: What did you buy today? Post your latest purchase!
« 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.
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 BravoV

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Re: What did you buy today? Post your latest purchase!
« Reply #6866 on: July 25, 2018, 02:21:02 am »
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.
 
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Offline rsjsouza

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Re: What did you buy today? Post your latest purchase!
« Reply #6867 on: July 25, 2018, 02:26:17 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. 
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 KaneTW

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Re: What did you buy today? Post your latest purchase!
« 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.
 

Offline Fortran

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Re: What did you buy today? Post your latest purchase!
« 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!  :scared:
 

Offline Pirateguy

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Offline bsudbrink

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Re: What did you buy today? Post your latest purchase!
« 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?
 

Offline Pirateguy

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Re: What did you buy today? Post your latest purchase!
« 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.
« Last Edit: July 25, 2018, 10:10:28 pm by Pirateguy »
 
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Online Zucca

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Re: What did you buy today? Post your latest purchase!
« Reply #6873 on: July 25, 2018, 10:15:16 pm »
Messtechniker, HighVoltage, Kjelt

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

 |O

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

Z
Can't know what you don't love. St. Augustine
Can't love what you don't know. Zucca
 

Offline Johnny10

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Re: What did you buy today? Post your latest purchase!
« 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 !
« Last Edit: July 31, 2018, 08:43:25 pm by Johnny10 »
Tektronix TDS7104, DMM4050, HP 3561A, HP 35665, Tek 2465A, HP8903B, DSA602A, Tek 7854, 7834, HP3457A, Tek 575, 576, 577 Curve Tracers, Datron 4000, Datron 4000A, DOS4EVER uTracer, HP5335A, EIP534B 20GHz Frequency Counter, TrueTime Rubidium, Sencore LC102, Tek TG506, TG501, SG503, HP 8568B
 


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