Test Equipment Anonymous (TEA) group therapy thread

[McBryce]

I had something similar printed a few years ago. I had it printed onto a sticky foil from a shop that prints window lettering/signs for shop windows and then stuck it to the underside of the glass (the print was reversed/mirrored to allow me to do this).

McBryce.

[Zucca]

Can they manage the transparent areas? Can you PM the contacts please?

[McBryce]

They printed it on a transparent foil. The place I used was a small local business, but somewhere like this can do it for you: https://www.stickersinternational.de/produkte/fensteraufkleber/

McBryce.

[Martin.M]

General Radio  500µµF arrived from the bay,



as reference for my Hickok Digital System.

[Robert763]

Can they manage the transparent areas? Can you PM the contacts please?

A graphics company could cut it in self adhesive film of the type used for signs and "wraping" cars.
Fairly cheap for that size. Then mask clear areas and spray paint background. Use a thin coat so A light shines thtough and B. solven does not affect lettering.
 

[BU508A]

What on earth are "500µµf"? 

Edit:

Got it!   

500pF is the correct answer ...

Wondering when the next one comes around the corner with  100µ²F  or something ...     

[bd139]

SAU system strikes again

(Stupid American Units )

[Robert763]

General Radio  500µµF arrived from the bay,

(Attachment Link)

as reference for my Hickok Digital System.

That's an oldie! 0.5% accuracy spec, normally much better.
Cost $6 in 1959 

[med6753]

What on earth are "500µµf"? 

Edit:

Got it!   

500pF is the correct answer ...

Wondering when the next one comes around the corner with  100µ²F  or something ...     

I was just going to comment that your fellow countryman were going to go "WTF" over uuF and they did not disappoint. 

"pF" didn't become common usage until the 1960's. 

[med6753]

SAU system strikes again

(Stupid American Units )

Bite me. 

[med6753]

You can feel the anxiety in the air. Potential major snow storm Wednesday into Thursday. Just like Covid that causes panic buying at the grocery. I went this morning as part of my normal routine and so far the unwashed are still home. But you can bet by tomorrow it will be a 3 ring circus.

So if the storm does indeed come to pass I'll stand in the window drinking my coffee watching the minions struggle to get to work to insure my SSI is funded for another month.     

[Martin.M]

µµf is correct, also µµF

see



 

[bd139]

I know it predates SI but it's silly seeing it now.

It's like saying "the ruler is 0.3 mega micro meters long"

[med6753]

Here you go Euro boys.....choke on this. 

[Martin.M]

in old germany it was common to write as a µµF = 1cm 

[vk6zgo]

What on earth are "500µµf"? 

Edit:

Got it!   

500pF is the correct answer ...

Wondering when the next one comes around the corner with  100µ²F  or something ...     

I was just going to comment that your fellow countryman were going to go "WTF" over uuF and they did not disappoint. 

"pF" didn't become common usage until the 1960's.

Bit earlier in Oz, probably mid 1950s.

Both were in common usage in1959, when I started work at an Electronic parts supplier------anybody active in Electronics in those years knew that uuF & pF were the same thing.

Back then, people could walk & chew gum at the same time!

[vk6zgo]

Here you go Euro boys.....choke on this. 

To hell with the uuF, etc, all the beardless youths will choke on "Electrical Parts List"!
It's a "Bill of Materials", don't you know?

I don't think I had ever heard of a BOM, till I went to work for an equipment manufacturer in the early 2000s---------all the stuff I had ever worked on had, shock! horror! "Parts Lists".

I tried using the latter term, but it still didn't work to get the sods off my lawn!!

[paschulke2]

in old germany it was common to write as a µµF = 1cm 

Almost. A capacity of 1cm (in the cgs system) is ~1.11pF in SI units. The conversion factor (m -> F) is 4 * pi * Epsilon_0 = 4 * pi * 8.85 E-12 = 1.11 E-10.
 

[mnementh]

I was able to get a good crimp by skinning the blue Pliovic sheathing off to just the right length and pulling the braid up over the barb, then crimping with only the braid between the ferrule and the barb. Also, the center pin of these connectors are too brittle for crimping; I had to solder. The cable seems to work well up to the 30MHz max of the UTG-962E; no idea how badly I've affected the capacitance and reflected signal of that BNC at higher frequencies.

Looking on the intardnet, it appears this is exactly the way these are commonly used for HDTV and security cam installs... blearrghh.

We've got a couple 100000 of those at work.  It used to be so, that due to the better mechanical properties of 50Ω BNC connectors, it was common practice to use them with RG59 and other 75Ω cables. There were "broadcast" BNC plugs made with the right dimensions for the cables but with 50Ω coupling parts.  (The BNC, as we recall, mates across impedances without mechanical harm, unlike the N where this is a cardinal sin). This practice was ended about 15 years ago with the introduction of HD-SDI, i.e digital broadcast quality HD Video over BNC connectors. The disturbances from such impedance bumps as were created by the wrong connector were too much of a reliability issue. 

Now, most really modern broadcast equipment tends to have a SFP+ cage. The use of the BNC is slowly becoming a legacy practice. Analog video transmission is already completely legacy for the most part in my world. It lives on in the synchronisation, which still largely obeys the restrictions of the CRT.  (And no, the Canal & River Trust is not writing the rules here!)

The text in red above is not correct! Modern 75 BNCs will mate with 50 ones without damage because they use the same center pin with reduced dielectric for matching - sort of.
TRUE 75 BNCs have reduced center contact diameter and will not mate correctly with 50 BNCs putting a 50 Male into a 75 Female will spread the contacts on the female. The other way round is likely to produce a poor contact depending on the exact type of Female contact design.

It's okay... I'm aware of this particular pitfall. Well, not aware of the reason, (still don't know why in the fuck anybody would fuck with a globally standardized part this way, unless it was deliberately to fuck shit up; if so  ) only that some the center pin measures ~0.25mm, while others measure ~0.35mm. These measure ~0.35mm, same as those on my scope probes.

mnem
*currently having a unnatural relationship with this cuppa coffee*  

[mnementh]

SAU system strikes again

(Stupid American Units )

Bite me. 

Agreed! All y'alls kin kiss muh scaly dragon arse!

mnem
Except where it comes to rods & hectares... those eeebil measures can go burn in a ditch.

[tggzzz]

µµf is correct, also µµF
...
 

Well "as correct" anyway

Just as it is correct to

• measure time in Siemens - a pet hate of mine
• have power stations with a power output of around one Watt - random ignoramuses
• measure energy in Watts or power in Joules - a "green" tradition

[tggzzz]

Bite me. 

Which bit, and before or after cooking?

(Where does that Merkinism come from?)

[tggzzz]

Here you go Euro boys.....choke on this. 
<Tek 503 parts list omitted>

Perhaps you would like to join the rest of us in the 21st century?

2060 is closer than 1960 (when the 503 was introduced).

[Zucca]

I reactivated this project.

Now I more want than need a ethernet cable check device. It should be a high quality chinesum one... 
Jokes aside I do not want to go over 150€ for a Fluke one...

PS: I am sure you guys will convince me to bank out 500€ for a nice pro device... bastards... 

[nixiefreqq]

Here you go Euro boys.....choke on this. 

"Euro boys" made me laugh out loud.