Tektronix DC503A Frequency Counter OCXO Mod

In this video I show how to add an OCXO (Oven Controlled Crystal
Oscillator) to a Tektronix DC503A Universal Counter/Timer module.
This mod effectively adds the 'Option 1' to the module for greater
measurement accuracy.
Manuals etc:
w140.com/tekwiki/wiki/DC503
OCXO Adapter PCB Gerber:
drive.google.com/file/d/1cYDE...

[@laa0fa502]

Watching this video knowing absolutely nothing about electronics is surprisingly understandable, great job. I found one on Craigslist and thought it was a Flux capacitor. Still not 100% sure of the point of it..

[@DarianCabot]

03:12 - Another option would be to make a PCB template that has the same dimensions and back card-edge connector. Then you could design circuits in your EDA software and have the PCBs made to purpose.

[@NearFarMedia]

Keep an eye out for a future video.... ;)

[@t1d100]

Nice clean up of the seller's hack. The extra OCXO is a good candidate to DIY a GPSDO Lab Reference with a cheap/Ebay NEO M8N GPS receiver = Atomic Clock accuracy, for about another $30USD in additional parts. Don't forget to buy the powered antenna puck. It's needed.

[@TheDefpom]

With the available resolution of the display I’m surprised that it isn’t just using a TCXO as that would be good enough, just without the hassle of the 2nd supply and warm up requirement.

[@NearFarMedia]

Yeah, I was thinking the same thing. There's barely any need for the extra precision if you can't even use it, but I only had OCXO's in my parts bin, so overkill it was for this unit. :D

[@TheDefpom]

@@NearFarMedia - I picked up some of these recently, they seem OK: 10MHz TCXO Module: defs.link/?u=e9a046

[@NearFarMedia]

Oh nice, little baby ones you could stick just about anywhere. Would make it much easier to retrofit into almost any device for a relatively cheap upgrade.

[@adrianschneider4441]

What is the model number of the blank module?

[@NearFarMedia]

Here's the page on the Tektronix Wiki, part number 040-0652-03
w140.com/tekwiki/wiki/040-0652-03

[@CEric-xd2rt]

It’s funny, because in France this kind of module is very expensive.

[@PauEstalella]

B00B13S, seriously? Sigh.

[@NearFarMedia]

I know right? The old 8.008135MHz strikes again!....