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R875 1ohm in +50v Supply, Vdrop of 0.22v ….. could this indicate a max current before the Supply turns off????? Absolutely! The current limit threshold looks to be around 200mA or 200mV across

Try here. Not a lot of different part numbers, but a good range of voltage / current / power. Also includes diodes. This is a “semiconductor kit” with transistors and

Hi, Tek 7S12. Thanks.

I had a few minutes to check it with a lower input signal. I was overloading it. As long as I drop the input down to -10 to -12db the signal all the way down to the L-pad relay is undistorted. The

Thanks Fabio, I am mistaken then, I have suspected that since brightness and readout intesity controls both work, readout is less bright than traces and can be completly turned off, however a part of

David Hmmmm . .... Takes less than a second here using either Firefox or Chrome. Not sure what the "fast page" /"slow page"? thing is about cant tell the difference here. Chrome has been doing wonky

Hello Francesco... Sticking up my nose here so, Chuck who has been on the lead on this thread has the final word but here is my 2?. IIRC your original description of the problem and if the readout

Firefox

Roger, Dave, et al, Slow response is no problem to me. I am appreciative of anyone spending their time to help. This process for me is just as much about learning the circuitry as it is about

Chuck I have taken your suggested measurements, since everything up to U950 seems to be working and VQ OUT and VZ Out waveforms are very near to the ones in the service manual, before ordering and

Zero problems from this part of the UK. I suggest a traceroute and/or a different browser and/or temporarily disabling browser settings. It is almost certainly irrelevant, but I did once find a very

Your own Electron Microscope? How cool but how on earth do you fit it in a house? This is just the EHT supply for the one in the Cavendish Labs in 1967 and no, that's not me, that's my colleague

I'm jumping around this topic and addressing things here and there. Not necessarily this particular post. There are some loose terms being thrown around about the NEC that need to be clarified. I am

All - I'm trying to de-clutter my lab space and have the following original Tek manuals to offer: 556 605 2215 Operators 2215 Service 2236 Operators 2335

Chuck, I got a little busy after I posted stuff that you objected to. A couple of things you said I would like to address. I posted about things that others had not said already. you said; "Anyone

Hi Ed, The GR Connectors were for the charge line to extend the pulse. They were only on the earliest version of this. That was the first one I listed of the four different versions. The last two

TekWiki is never slow when I connect to it. Dennis Tillman W7PF

link is bad

Hello All, I've been lurking in the group, on and off, for years. That's been fun, thanks! I have a collection of old 500 series scopes and plugins that I collected about 15 years ago at hamfests.

Hey everyone, I've been trying to characterize the trigger jitter on my 547 and I'm not entirely sure what to expect. I've fed a 30 MHz square wave into the ext-trigger input of the A (B) sweep and