To second Dennis, this is exactly what we do, and we’re a professional audio archive lab. George

Massdrop had one a week ago for $140. I was actually quite surprised to see such a specialized piece of equipment show up for sale there. If it's not available now, be patient, it'll come up

Dave- You might consider going to ham radio swap meets. A really great FET differential probe is the Tek P6046. I picked up one for less than $50 if I remember correctly and it is perfect. Many

There were some selling very reasonably on eBay not too long ago; they still might be on there. Have you checked? Dave Casey (who is not currently selling any scopes on

Anyone have a Tek 503 that's looking for a new home? The 503's specs fit nicely as an output display for an analog computer project I'm working on. Or, perhaps there's a better, newer model the

There is no such thing as a cheap differential probe. They have to be matched across a wide frequency range to have good CMRR. If you want a cheap CMRR the solution may be on your scope. All dual

A giant rubber band also works to hold the plugin in to the connector. Hobby stores sometimes sell them. There may be something wrong with your TM501 connector if the extender card falls out. I can't

I'll cite one example of a mod not having a 2-letter identifier. On at least some of the 7L12, 13, and 14 spectrum analyzers, before Option 39 was available the same effect could be had as "Mod 139U"

Hi Håkan, All of the instruments that I know of which have been modified have a Tek label that says something like "MOD WN". The MOD is always identified by two letters on every plugin that has a

Hi Velik, You did a great job! These look as good as the original skirt from Tek. I am very impressed with how all three dial's turned out. There are many times when members need to make

Sadly, nothing under £100 on fleaBay :-( Anything in the DIY arena ?? Dave

Try ebay. Bob

Can anyone suggest a source of the above ?? DC to 20MHz would be more than adequate. I don't even need a high voltage device - 30V would be OK, 100V would be better. I'd even consider a DIY or kit

I'm looking for that disc for a AWG 2040. Michael Lynch From My I-Phone mlynch002@... 479-477-1115

A while back I found a guy named Bob Haas, who was selling molded 400 series feet on eBay, try and make up some 314 feet (same as the 335.) I sent him a couple of feet and he made a couple of sets

Jeff, the foot is packaged up in a USPS Small Flat Rate box. Hopefully I will remember to mail it tomorrow and you will likely have it Monday. You should have received an email from the USPS with the

Hi Rick, This would be a much cheaper, do it yourself, alternative that would take you a few minutes to make. Buy this resistor and put it on a dual banana plug: Through Hole, 1W, 600ohms, 1%,

Siggi, At the bottom of Håkan's page that I linked in: "NOTE: Since my Microfiche copier recently broke down I will not be able to provide any scans, at least not for some time. This message will

Hey Brian, Håkan is a member here - at least he was before the relocation to groups.io. He's frequently helped out other Tek enthusiasts with this and that, sometimes by consulting his microfiche

well, now that you know the resistor values for sure, the next step would be to measure the voltage drop over them in-circuit. I'd suggest leaving the scope running for 10-15 minutes before you do so,