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Hi Tom, it seems as if there are two thermal effects, one fast and one

Thanks Albert, now is corrected: Hi, here are the results of my setup, when pulsed Vce increases, Vbe decreases. Due to the shape of the delay, it seems like a thermal effect. Pulsed Vce and

Miguel, your links to Google photos produce error 404 on my laptop. Albert

5 inch New In Box JAN CNU-5CPI O Scope tube in EICO Box. Used in lots of old scopes including Heath. Old Tek and used in WW2 Radar facilities. Other stuff (cheap): Acopian 28 Volt PS R28W7AH

Hi, I have a 80E03. Does anyone know if this module is compatible with 11801 series scopes? It seems to have the same pinout, and the sampler looks the same.

Thank you, Adam, I knew I was missing a critical bit. Yes, the SAE connector, that is, Society of Automotive Engineers, the same group that created our oil viscosity standards. When mechanical

A google search for "SAE connector" should give a bunch of options. As others have suggested, you may even find them locally at a hardware or auto parts store, although four-conductor is more common

The same setup but a low speed and at more base current, 50uA. It is as if there were two thermal effects, one at high speed and the other at low

Pulsed Vce (2v offset, 10V amplitude) and Vbe, with Ib=10uA (fixed) /g/TekScopes/photo/294446/3776565?p=Created%2C%2C%2C20%2C0%2C0%2C0

Hi, here are the results of my setup, when pulsed Vce increases, Vbe decreases. Due to the shape of the delay, it seems like a thermal effect. Pulsed Vce and

Well, that confirms Tek made it, for sure. Thanks, I was not aware of this late version before this conversation. You might contact the VintageTek Museum, they have a big stock of manuals. Our own

Automotive parts house ?? Leon Robinson ?? K5JLR Political Correctness is a Political Disease. Politicians and Diapers should be changed often and for the same reasons.

Dave I have added a picture from TekWiki showing the same connector. Not conclusive but a small piece of evidence. That made me think yo look in the Tektronix catalogue. The 1990 catalogue shows a

The following photos have been uploaded to the 134 probe amplifier new connector ( /g/TekScopes/album?id=294658 ) photo album of the [email protected] group. * 134_latest.jpg (

There were some errors in the drawing. /g/TekScopes/photo/294446/3776363?p=Created%2C%2C%2C20%2C0%2C0%2C0

Miguel, Annoyingly both my 7A13s suffer once more from those bad relays contacts. I have used a 7A22 instead but the overdrive properties are not good enough to trust the results. I used a PG504 as

The summary of that PDF is that when a transistor is in quasi-saturation, the loss in Hfe is due to current through the B-C junction, but that current may be coming from before or after the internal

Good idea to draw on the traces like that, makes it much clearer. This PDF may be relevant to what we are observing, although it is somewhat

Yes, I'm giving away my TM515. This is the 5-slot portable suitcase style TM500 series mainframe (https://w140.com/tekwiki/wiki/TM515). I understand that with an AA501 or AA501A audio analyzer and

Setup to test Vbe thermal intertia? With a 7A23 differential comparator or similar and a pulse generator. /g/TekScopes/photo/294446/3776127?p=Created%2C%2C%2C20%2C0%2C0%2C0