Hi Richard, I checked my notes and found the following: " Tektronix 466 Repair (October 2013): 466 early model, Timing circuit board A7, signal 'A' SWP START LEVEL to Q1002A C1115 shorted (Tantal,

I currently have the crt removed,is it ok to power the cope on with the crt removed,or do i need to connect the anode eht to prevent arcing?

yep, i see that now. odd but REALLY resolved now. thanks, phil

------- It is RT4373, on A4 board diagram it is shown to the left of R4373 trimpot. In your picture if you look at the same location there are two empty solder islands, instead the thermistor is in

Ahhh...i see it now in the circuit diagram. it is just not depicted on the A4 board for some reason. Thanks.

I agree the V rating should be higher. even 25V seems a little low but 35+ is likely sufficient.

"The mysterious cap you mention is a 50 ohm thermistor in parallel with the 27 ohm resistor." thanks Mark. I have seen no documentation of that thermistor. How do you know this? Where can i look?

Hi all, I'm currently running firmware 5.2e on my TDS784C scope, but I've heard there is a version 5.3(x) floating around. Does anyone have a copy of this firmware, or have a scope with this version

Hi, I had the pins and sticker supplied with the switch when I purchased it. Maybe they forgot to include them with the switch when packing them? All you really need is a two short bits of wire to

C4331 is 47mfd. It should be 25V or 35V. Using a larger value, 100mfd 25V ULD for example, will work. The mysterious cap you mention is a 50 ohm thermistor in parallel with the 27 ohm

Hi Jared, I have now (eventually) got what all of the parts for this tester seem to be. I am however a bit puzzled about the Grayhill switch. Mine doesn't seem to have anything other than the switch,

I do still have some of those boards available. Thanks, Barry - N4BUQ

Greetings 465/465B repairers and recappers. I have just spent time with a couple of broken 465B's and thought I'd pass along the experience. 1. Recapping low PS I recapped the low power supplies and

Hi all, I recently acquired a TDS784C scope and I'm interested in adding the HDD and video trigger options. Also an early serial number 2M (8M memory) option board too. If anyone has these parts

Bruce, Replacing the backlight is apparently easy. Here is an entire thread discussing the topic https://groups.io/g/TekScopes/topic/83184585#183313 The web interface for Groups.io provides an

7B92, S/N B052568, No Sweep, Help! Since it has been almost a year since my 7B92 arrived in my new-to-me 7904 I’ve decided that it is time to make it work. Test setup ‘92 installed in right-most

coincidentally but apropos, on a 465B, i just had a film cap fail that was apparently used by a previous owner to replace a failed tantalum filter cap. he used the same voltage rating. it was rated

Fellow Tekkies, I'm on the tail end of my annual run to the Bay Area, and one of my acquisitions is a Tek 1503C TDR. The unit's in outstanding electrical/cosmetic condition, and even has a good

Although I have never used film caps myself, I would think that they would be a good alternative to tantalum caps. Much better than aluminum electrolytics, for sure. -- Michael Lynch Dardanelle,

Martin, Replacing tantalums with film is fine. I have replaced a lot of the axial types that are 1mfd and lower with film. The radial types I also replaced with film. The originals were high ESR. One