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I have a Tek 485 that I have had and used lightly for 20+ years with no issues.? That is until last night.? I hadn't used it in couple of months. After turning it on I went to adjust the Intensity

According to Tektronix (back in the day)... The solder they used... for the metalized ceramic strips (the notches were metalized with silver.. and dip coated with the solder) The solder they used was

Bonjour à tous In 1960s Sidney S Smith was the audio and analog engineer at Marantz, Dick Sequerra was the RF genius. In 1971, I had the good luck to work with them at their newly formed Sequerra

The P31 conversion is done and looks great. Both CRTs are in very good shape and bright, with no burns at all. Still working on the other stuff. Will report next year. Ed

Hi Richard. I have plenty of these. PM me your mailing address and I will send you a set of four. Do you need all parts for each one ie the screw, plastic part, and the little metal thingy?

Hi Jim. To be frank, it seems a bit premature to look for probe information when you don’t have a scope, and maybe don’t know what you are going to use it for exactly. It might be better to look

Ed, My first thoughts after reading the descriptions are switch contact issues in the selector switches and or something in the routing logic that is on the back plane of the mainframe. If I remember

I have this last 7904 up and running as explained previously. It showed several problems including readout loss, severe vertical compression, A-horizontal failure, and supply crashing when control

A CORRECTION I gave the wrong links for the "Radiotron Designer's Handbook". I gave links to the table of contents only, the full text is available, it is: Radiotron 4th

Anita Abranovic <anita.abranovic@...> added the photo album JFETs substitution for 12au6s in 575 curve tracer ( /g/TekScopes/album?id=299769 ) : Both horizontal and vertical

In very good mechanical condition, lights up when plugged in, controls and buttons seem to work. $100 and I'll ship free (from Austin) CONUS only please. I can't guarantee it since I don't have any

A few things to consider when selecting probes: Check the probe's compensation range against the input capacitance of the scope input. For work in tube circuits check the max input voltage spec of

https://www.ebay.com/itm/306010250361

Mark, I listed the Multiplier and knob on eBay. Barry

Hi Joel, Sorry to say, they are already spoken for. I will let you know if that changes. Regards, Barry

Hi Barry, I'd be interested in buying the remaining V/Div knob(s). The ones I have have lost the silkscreened numbers (1/2/5/10 V etc...). Will pay a reasonable price + shipping to France, of

I just got an email from groups.io saying Dennis is due to be billed for this. 1. Is Dennis still with us? a. If no, groups.io need to be informed who should be billed b. If yes, and he's not

I don't know of a reason to call the 535 best for audio work, but if so, I'd pair it with a 1A7 plug in for it's 10 uV/div sensitivity and variable bandwidth, 2nd choice 1A1 for 5 mV sensitivity with

Thank you, John, Dave, and Richard!? Now that I think about it, I did see that P6006 probe mentioned on eevblog, IIRC. Much appreciated! Jim

I’ve been using the WBT solder on all my Tek repairs and have had zero issues. But I bought my 1/2lb when it was $50 cheaper. And still have over half of it left.