WTF - you better mind the notes on the inside of that monster. That nice huge metal panel on the inside that your mind just wants you to attach your scope ground clip to -
CAUTION: DO NOT GROUND THIS CHASSIS
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
Yeah how thoughtful of Tek isn't it ! In any other piece of gear with a live heat sink, there would be zero warning, they leave it to Darwin to figure out whose worthy of being a service tech or not !
![Scared :scared:](https://www.eevblog.com/forum/Smileys/default/scared.gif.pagespeed.ce.oZptHNcbsD.gif)
Looking back at the pic, I notice that there are 2 missing rubber grommets ! 2 out of 5. So had a look in the flesh... grommets are STILL there... but they split in two, each half fell off of the heat sink and slide along their wire. Found them riding on the wires a few inches down...
I think this style of grommet is fairly standard, you can still buy them new today.. so 5 new fresh grommets are on order, me thinks !
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/xcool.gif.pagespeed.ic.cOxV6sPNRd.png)
Took a close-up pic of the two power trannies mounted on the other side of the heat sink. Pics at an awkward angle sorry, because the neck of the CRT is right by the trannies.
One transistor is in a T03 package which looks mundane today but was probably state of the art back then...
It's so crusty that I can't read the part number, it's half gone. It's made by RCA. However one can see it is weird : it wears TWO part numbers, both starting " 2N " something. Strange...
The other transistor, made by Motorola, is an old weird looking package, golden, shaped like a lithium coin cell or something ?!
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
It too, has 2 different 2N part numbers ! What's up with that ?!
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
However this time the package is in good shape so we can read those numbers : 2N277 and 2N2082.
I Googled both numbers, separately, and they both led to the same thing, same package, so it's comforting... maybe the double P/N means the tranny is compatible with both ? Maybe the 2N277 was an ancient one, given it has only 3 digits ! Maybe when they decided to switch to a 4 digit numbering system, the 277 got renamed 2082 ? I have no idea ! Maybe the grey beards on here could enlighten us ? Share your knowledge people, or else what good is it for !
![Grin ;D](https://www.eevblog.com/forum/Smileys/default/xgrin.gif.pagespeed.ic.QVVz6XIT20.png)
Anyway, according to what Google found me about this weird transistor... it's a beefy Germanium jobbie, 15 amps ! GERMANIUM ARRRRRGH !!!.. BUT somehow there are not one but TWO sources for NOS items, both in the USA ! A surplus store that sell the 2N277 for 9 bucks, and they even have a shit load of them, 234 units !!!
![Shocked :o](https://www.eevblog.com/forum/Smileys/default/xshocked.gif.pagespeed.ic.CrwtrNUjLO.png)
So I am covered, great !
https://www.electronicsurplus.com/motorola-inc-2n277-transistors-pnp-40v-70-watt-at-25degcThen this Ebay store sells the 2N2082 for twice that amount :
https://www.ebay.fr/itm/113865954592