Repair

Yamaha EMX 62M : SAFETY NOTICE
Mixer amp With age,humidity or temperature or whatever, the screening card lining the inside of the plastic case can curl up and touch solder and traces on the IEC sub-board, aluminium side to mains voltages. Cut away all around that corner on the rear and side card. The EMX 88S has proper rigid metal work aroun... 22 Feb 2010 14:09

spectra physics fiber coulped laser diode type 0129-2653 Rev. D
Hi there, I've got a spectra physics 0129-2653 Rev. D laser diode a few days ago but I don't have any specs about the operating current / threshold current; I only know the wavelength is 808nm and Pout is about 30 watts. Does any one have more detailed information on this diode? Thanks, Thomas ... 21 Feb 2010 17:09

Lewis Engineering Pyrometer
Model 73PO14. Just picked this up (cheap). But with no manuals and none to be found via Google. I'll have to pick up some Type J thermocouple wire and goof around with it. In the mean time, has anyone here had any expreience with one of these (or something similar) and know what the knobs do? Calibration proced... 20 Feb 2010 01:28

Case or pouch for Fluke 87 + probes?
I've got a new 87 and I want to get a protective case for it. Fluke wants $35 for what amounts to a piece of pleather and a zipper. Let's just say I don't want to pay it, and leave it at that. Who can come up with a cross-purpose case (ie, made for PSP or Wii or such) that will work for an 87 and a few se... 21 Feb 2010 17:09

electronic start for fridge motor?
Hi all, sorry for slightly OT! A friend of mine made a very nice compressor out of a fridge compressor motor, now this motor has a PTC kind of starter relay. The problem is that the PTC remains in his "hot" state for some minutes after the motor has been powered down by the high pressure relay (added extern... 19 Feb 2010 12:07

Samsung plasma TV PS-42V4S
Hi all. I've a plasma TV which has a problem with the picture. If you think of verticle lines through the entire screen, I would say the 1st, 5th and 10th is not lit. BUT, menus and on-screen displays work perfect giving a correct picture. But which ever input source I choose, (both scarts or composite video) the ... 14 Mar 2010 18:46

Sacrificial power darlington?
For an audio amp that may have catastrophic oscillation problems. If you combined TIP3055 and TIP41C (say) , with biasing Rs of 40/ 8K scaled for particular use, plus a power diode, would that give you a functional power darlington. And more so in this case TIP2955 and TIP42C to stand in , for initial proving purpo... 18 Feb 2010 06:08

how to hide a cell phone tower...
http://www.edn.com/blog/1470000147/post/1920049992.html?nid=3351&rid=764914 bob ... 18 Feb 2010 05:03

Sony 27" Trinitron Dead
It's a KV27TS20 almost 19 years old. Don't worry...it's been superceded with a nice Sony HD LCD TV. But I figured I would at least take a look before tossing it. And fix it if it's something simple--even if it only benefits the person picking up from curbside. Symptoms: Totally dead. Does not respond to f... 7 Mar 2010 02:03

Technics RS-TR255 Cassette Decks
This may well qualify as a "Lost Cause", but ... I have 2 dual decks per the subject line. On both, the record drive will not spin a (good, tested) tape. Same tape works OK in the play-only drive. On a workbench with the case open, I push button for play or record or rewind (forward or backward), the machine... 27 Feb 2010 18:48