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Any thoughts on Triflow? https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=triflow&_sacat=0

Dave, Maybe this last picture will answer some of your questions: ? /g/TekScopes/photo/262670/3204540?p=Created,,,50,2,0,0??

Good day, While working on a troublesome plugin, I had cause to open up my TM504 to check the power transistors (as one does). I am surprised to find that Q22 and Q30 (an NPN from one middle slot, a

Interleaved. If by IC version you mean U440, it’s there. How do you mean? I don’t see any differences between this scope and my other 465, or my 475A, or my 465B as far as the Time/Div knob(s).

How about a freebie: I once bought a rackmount 7844 (400 MHz double beam) mainframe in unused condition, apart from a few light scratches from the sliding action. Seller didn't know much about its

Difficult to see what's behind the dirt. Even for a 475, $100 would be a lot, especially in the state it could be in. $80 for each wouldn't be a bargain either. The trolley is ok. There seem to be 2

That's an HP Spectrum Analyzer. I wish I was where I could get that one. Oh well... Thanks, Barry - N4BUQ

Interesting, Dave. I think you already know more about the 465's history than I, with my more general knowledge. Please keep us informed. Raymond

Strange ad. He says 2x 465B, but the picture shows 2x 475 plus something I don't recognize. Located about 45 min from me.. No connection. Bob

Interleaved Oh yes, I completely forgot that. Of course it's very special! Absolutely big enough for all Tek 'scope work! That is fine, start with 12VAC. Raymond

Nice catch! ;-) As fans and long time users of Tek products, I suspect we all tend to assume that all Tek products leave the factory in perfect condition. I certainly used to, but in the past 20

Guys, I'm curious to know how "rare" these early scopes are any more. Tek seems to have made these early changes fairly quickly, even before the actual SN B250K. I currently posses a B177K and it

I just think that the fact that it’s serial number 465, which is the same as the model number, is kinda neat. Other than that, nothing special. It’s just a serial number... ??♂? I’ll

You are right, Raymond, I missed that RT1110. Circuit is actually more than interesting in what it does... TT

Stephen, The gained experience in itself is worth the effort, not much money lost if it doesn't work out. The serial number is nothing special for a Heerenveen (NL) -produced Tek. Non-US serial

I have used Mobil 1 0W-15 on every kind of small motor, including Tektronix fan motors, for decades and not had a problem. I use hydrocarbon formula (flammable) brake cleaner or choke and carburetor

Raymond, I know you knew that, and that it was an honest mistake. I just pointed this out so future people that will be eventually interested in this restoration, won’t get confused, and try to

FYI: http://www.moebius-lubricants.ch They sell all kinds of synthetic oils (and greases). Raymond

Correction: "Very little to lose, a lot to gain". Raymond

I agree that synthetic oils would seem to be a better choice here, but there may be a problem with mixing synthetic and petroleum oils. Will they play well together? I don't know, and I figured that