Hello Bill - I saw your message about extenders. I need to see how many parts I have, but I am pretty sure I have everything. I'll check today some time and let you know. Do you want one extender or t

FYI, and sorry if you already have this info, that should be a 2N3724A.

Hi Team Tek - I am considering upgrading my scope. There are a bunch of TDS5104s and TDS7104s on Ebay, and other than the OS, I can't see any difference in their specs. Does anyone know how these two

InstaVu seems like the right place to start, but I don't know a way to trigger properly (on both edges). Has anyone done this on this vintage scope? Thanks Dan

I've had a couple of TDS7x4 scopes with issues on that board. Below are some notes that I wrote up once for the group. Also I have a schematic that I got somewhere for a TDS544 HV board, and I was abl

I have parts for extender kits on hand (for TM500 / TM5000). I have been emailing people that are on my wait list, but if you haven't heard from me and would like a kit please contact me off list. Kit

Not sure why the link doesn't work. If you search it doesn't come up, but I suspect that's because they are out of stock. Here is the link again, just in case: https://www.amazon.com/dp/B078SY3X1H If

Hello Tek Heads - I made a bunch of extenders, thank you to those that purchased through my Amazon page or through this group. I hope everyone that bought one is happy with them. I am out of PC boards

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 diodes: https://joeknowselectroni

Hello Tek-heads - Thanks to everyone that bought these TM500 / TM5000 extenders. I had a lot more demand than I expected, so I am sorry that some orders took some time to fill. These are yellow (I wan

You say "dot" but the first link shows a ramp signal. Does it respond to any signal on the probe input - any movement up and down? I had a 485 that I nursed along for several years. Really an amazing

Hello Group - I've had a few people ask if I made other extenders (rather than the TM500x). They are easy to design and PCBs are cheap these days - so I'm up for it if there is enough interest to cove

Thanks Erik - Once I get those edge connectors in I'll get back in touch and figure out kit or parts. They might be here this week. But if you don't hear from me in a week or so please email me. THank

Hello group! For anyone that is interested in these extenders, either fully built or parts, I ran out of everything from the Amazon orders. I'm sorry that I had to give the Amazon orders priority, but

I have no idea but I suspect they aren't compatible. If it helps, I uploaded a drawing showing the pinouts for the TM500/5000. The file is Tek500_5000_Pinouts.png. There are a couple of signals that u

I've offered these in the past. I made them for my own use, and for forum members. Since then I have become an Amazon seller so I've added the new updated version of the extenders there (see link belo

Yayyyyyyy!! Operator error! When I cut away the bad burned FR4 I made a mental note to reconnect the top and bottom copper planes that I had severed. My mental isn't what it used to be. Thank goodness

Well I must have angered the Tek gods. Replaced the TOP200 and the bad zener, and still no startup. I am going to start ringing out other parts of this board now, I suspect that maybe something has sh

Thanks for sharing that link to the schematic. Yep, that's the circuit. I'm going to try a new TOP200 and replace that bad zener, and hope that my xformer is okay. I did see the 27 ohm resistor, and i

Replaced the 2700uF caps and it doesn't start up. Ringing out that TOP200 circuit, I found that the primary winding of the xformer has fused open (near the pin), and also a zener on the output side is