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On the calibrator ground thread, someone mentioned finding a miswired ground resistor, original from the factory. I thought it would be interesting to let people list the Tektronix factory assembly

On ebay, miss-listed as a manual for a 067-0554-00, this is actually a manual for a 067-0544-00, a calibration plugin for the 647A. www.ebay.com/i/133659054167 I don't know how useful or common this

I'm not presently where I can look at it, but I opened my TM504 a couple of weeks ago while evaluating electrolytics and pass-transistors in my TM for ordering replacements. Fortunately those in the

Christian, Dan is most likely right.about relocating transistors that are too hot where they were originally. I have not looked at the schematic or have this device. It makes sense to do this

Hi Christian, This arrangement should be factory-standard. My TM504 is configured the same way, and Fig. 2 Exploded Parts Diagram (rev B from 1974) shows item 34 (identified as Q22 and Q30) as being

What is the part number of the fan motor? I have a Siemens fan motor from a Tek 7104, so it may be larger than the one from the 2465. It is about 2.6 cm diameter by 5.6 cm in length. It is soldered to

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