On to my T12 Project:
So I found and ordered a SSD-1306 driven 1.3" OLED display yesterday as I had a small windfall via PayPal and didn't mind paying like $3 extra to get it this month instead of sometime in March from China. I just got an eMail telling me it shipped... and tracking shows it about halfway here already. I could actually have it by Saturday (knock on wood).
Meanwhile, the KSGER gear I ordered almost 3 weeks ago... showed "Processed through a facility in Shenzhen" on Feb 2nd and hasn't updated since.
Either it got on a plane, or it fell off the alpaca's back somewhere between Wutong and Nanshan mountain. ![Banging Head |O](https://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif)
*Carefully places the soldering station to the back of the workbench and turns off the lights*
mnem
"...and stars in my pocket like grains of sand..."
it's Chinese New Year holiday's mate, I've got a batch of gear being manufactured by Elecrow atm and it's been delayed by 2 weeks due to the holidays.
Oh, I'm painfully aware of the pitfalls of CNY, trust me. I've been buying components from China for decades. This stuff was ordered 3 weeks ago and like almost everything I order this way, I paid for ePacket; all they had to do was get it to the USPS Depot in Shenzhen. From there, it's on the USPS calendar, not mainland China's.
Some vendors just don't know how to process ePacket correctly; about half the time they use China Post to get it to the USPS Depot (totally defeats the purpose) and if they use the China Post mailing app, it gets processed as if it were a China Post parcel, NOT ePacket.
If it's processed correctly with a USPS ePacket label, it takes 10 days or less from the time they get it at the USPS depot; this is what ePacket was invented for; to get components from China into US devs and engineers' hands without waiting forever and costing more than they're worth.
To get away from 20's era battery sets and back onto test gear, I finally got ambitious and got the Agilent 8644B that arrived from the 'bay around Christmas back up and running. It had a shorted cap in one of the modules.
![](https://photos.smugmug.com/Electronics/HPAgilent-8644B-Synthesized-Signal-Generator/i-XZLzF75/0/81e8948f/L/HP%208644B%20open%20interconnects-L.jpg)
I realize that the modules are needed for shielding and ease of construction, and that capability-wise it blows the older gear out of the water, but it still looks kinda boring inside compared to the old stuff that's packed to the gills with visible circuit boards.
Still, nice to have it operational. Thread on it here:
https://www.eevblog.com/forum/testgear/hpagilent-8644b-synthesized-signal-generator-bad-cap-repair/
-Pat
Actually, all that shielding and $20/foot cabling with $20 connectors on each end just screams "lots of electrons being tormented, molested and abused at very high frequency" to me. Turnabout is fair play, says I.
It reminds me of pics I've seen of the equipment inside of 70s-80s vintage satellite gear and some of the stuff from various NASA missions I've seen. i've always been a junkie for pics of the nuts & bolts of that kind of high-tech; doesn't matter to me if I understand how it works or even what the particular device does; I'm still just fascinated by it in the same way I am with high KW commercial broadcasting gear.
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
Starting to wonder if the dills at Pittney Bowes in Erlanger are on Chinese New Years as well. 6 days since my 5326B moved
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=395533;image)
edit : Wonder what the problem might be..
Have you been licking live traces again, bean?
![Tweak :-/O](https://www.eevblog.com/forum/Smileys/default/smiliey_cal.gif)
What's this; your 704B?
Yep, the Vulcan was capable of being flown like a fighter, even rolled and at high altitude nothing came close to matching its ability.
Check out some videos of the B-1B. It can be tossed around like a fighter too.
I've always had a soft spot in my heart for Delta wing jets; when I was wee little I had a picture book about what they imagined space "life" would be like back in the 60's, and all the "commuter" ships in that book were Deltas of varying size. That was a favorite book pretty much until it disintegrated from being thumbed through & reread over & over again while listening to "Rocket Man" and "Major Tom", etc at high volume.
We all got cheated, man. Big time. Hahahaha I wonder how long before they notice ![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/cheesy.gif)
The stupid thing I can see is that the box has "quantity 4000" on it. Then they stuck another stock label on with "quantity 1000" and then they sold it for "quantity 20" price. ![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/facepalm.gif)
They are some odd values though, so maybe they want to reduce stock levels a bit?
I'm thinking exactly this. following required Chain of Custody protocols for disposing of e-Waste in their commercial setting may be quite costly due to the management-level man-hours involved; it may be cheaper to give the stuff away AND eat the shipping (after tax write-offs, etc) through normal channels than to pay for it to be handled as e-Waste.
This is definitely a mistake. I just had two boxes of 4000 arrive!
![](https://i.imgur.com/TeTacP0.jpg)
That cost me £2.71 including next day delivery ![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
*SCHWANNNNNG!*Dammit dude... that is what I call some proper "Morning Wood"!
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
Do this things count as TEA purchase ? ![Grin ;D](https://www.eevblog.com/forum/Smileys/default/grin.gif)
Resistance of 1K, 10 miliOhm and 1 miliohm shunts, with 0.1 % tolerance and TCR of 30-50 ppm/K.
Tempted by their nice resistance numbers. ![Tongue :P](https://www.eevblog.com/forum/Smileys/default/tongue.gif)
![](https://www.eevblog.com/forum/chat/what-did-you-buy-today-post-your-latest-purchase!/?action=dlattach;attach=395642;image)
As long as you use them to build test jigs, fo' sho' TEA in all it's glory.
These are a few of my own favorite eBay resistor searches:
1000W Braking resistor:2000W braking Resistor:Braking Resistor will return a lot of interesting high-wattage resistors, including lots of various aluminum shell modules in 5-50W range sold as ballast resistors to keep CANBUS cars from having a shitfit conniption about upgraded LED/HID lighting. They are crazy cheap in most cases, given the wattage/peso.
Win! Mine hasn't arrived yet ![Sad :(](https://www.eevblog.com/forum/Smileys/default/sad.gif)
They're really good resistors. 50ppm tempco 1% 600mW.
I'm going to build an HF dummy load (6/12W undecided) with mine when they turn up. Need to work out a fun topology where they won't desolder themselves first ![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/cheesy.gif)
Pcb with 2 rails and then you'll have lots of air round them to help disapate the heat both soldering and in use?
That would be too easy. I've got some left over ring main flex which has proper thick copper in it. Figured I can build a rolled radiator pattern. I played with 3d topologies but you can't get an equal load across each of them which means hot spots and meltdowns.
Assuming I'm using 100 ohm resistors, of you have N resistors in series, that gives you a total R of N*100. Now to bring that down to 50 ohms you need (N*100)/50 of those in parallel.
So 5 resistors results in 10 bars of 5 resistors = 50 total = 30W.
Lets go mental: 10 resistors results in 20 bars of 10 resistors = 200 total = 120W.
Lets use ALL the 8000 resistors = 4.8KW ![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
SWR of that will probably be horrid though ![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/cheesy.gif)
I figure the SWR of anything you build with lots of film resistors is gonna be pretty horrible, unless you're operating down around Children's Band or Skipland. Otherwise, if you're just dealing with AF or DC, see above. A 1KW 1 ohm resistor will dissipate 4KW quite easily in a 5 gallon bucket of water for approx US$75, including the bucket. I know; I've done it.
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/evil.gif)
mnem
There is something seriously wrong with me...