Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
Specmaster:
Heads everyone, TTi TGP110's are back in stock again and they have 18 in cream and 19 in grey.
https://www.ebay.co.uk/itm/Thurlby-Thandar-Instruments-TTi-TGP110-10MHz-Pulse-Generator-Cream/273212896520?hash=item3f9cc1f508:g:jw4AAOSwVtZaDcQ0
https://www.ebay.co.uk/itm/Thurlby-Thandar-Instruments-TTi-TGP110-10MHz-Pulse-Generator-Grey/123132720954?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D50980%26meid%3Daf55192cbe614b288b6d315ab432cbc7%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D123132720954%26itm%3D123132720954&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3A97534932-5817-11e8-9c93-74dbd1807a7a%7Cparentrq%3A62dad2dd1630abc5a69e3e9cffff26c4%7Ciid%3A1
Cubdriver:
--- Quote from: bitseeker on May 15, 2018, 04:54:28 am ---
--- Quote from: Cubdriver on May 11, 2018, 07:52:43 am ---
I snagged that a few years ago out in CA; the display was not working so I gambled for $350 IIRC (plus another c-note to ship it home; the friggin thing weighs around 75 pounds!). It turned out to have two bad electrolytic caps in the display driver circuitry; it was all of about $3 in parts to bring it back to life. I lucked out on that one!
--- End quote ---
:o Talk about scoring a deal! Now, that's a TEA party.
--- End quote ---
Yes, it certainly was. They were asking $500 IIRC, but when we plugged it in and it showed no signs of life other than the fan spooling up, I offered $350 and they accepted. I'd recently read about the VFDs in them going bad, and seen something about fitting fourteen segment LED displays - likely here - and figured that was always a possibility. It seemed a bit odd that BOTH displays had failed, though, and thought I'd seen a tiny flicker in one of them, which meant power supply issues were a possibility, too.
I found schematics and started poking about, and the trouble revealed itself quickly when I looked at the board with an IR camera and saw two glowing electrolytics. I did some probing with the scope to make sure the drive was there, then replaced them and lo and behold, the display lit right up! Sweet! I ran the self cal (Lord only knows how long it was on a shelf before going to surplus), then checked it with the recently calibrated bench meter at work, and it read pretty much dead on. I was a happy camper til time to figure out packing it came along - that was a challenge. It's about 24" long, so I had to modify one of the 24x24x24" boxes I normally ship my boat anchors home in to make it longer and thinner. PITA, but it made its cross country trek unharmed, so all is good.
It's funny when packing the instrument to ship it winds up being more challenging than bringing it back to life was...
Edit to add repair images
The display board (display power supply circuitry at bottom right):
The overheated cap (seeing the pic reminds me that just one was bad. I shot gunned them, though. The thermal and visible outline images are misaligned because the picture was taken with the thermal camera quite close to the board and there is parallax error between the thermal and visible light lenses. The thermal image is above the visible light image):
-Pat
Mr. Scram:
--- Quote from: Specmaster on May 15, 2018, 08:16:50 am ---Heads everyone, TTi TGP110's are back in stock again and they have 18 in cream and 19 in grey.
https://www.ebay.co.uk/itm/Thurlby-Thandar-Instruments-TTi-TGP110-10MHz-Pulse-Generator-Cream/273212896520?hash=item3f9cc1f508:g:jw4AAOSwVtZaDcQ0
https://www.ebay.co.uk/itm/Thurlby-Thandar-Instruments-TTi-TGP110-10MHz-Pulse-Generator-Grey/123132720954?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D50980%26meid%3Daf55192cbe614b288b6d315ab432cbc7%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D123132720954%26itm%3D123132720954&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3A97534932-5817-11e8-9c93-74dbd1807a7a%7Cparentrq%3A62dad2dd1630abc5a69e3e9cffff26c4%7Ciid%3A1
--- End quote ---
I have not convinced myself I need one so far, but that can obviously change. ;D
bd139:
I'm busy convincing myself now :D
bd139:
Actually I've unconvinced myself now as I have a couple of other things on the watch list which are more important at the moment.
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