OK, some initial testing. More advanced testing later with the Heath IG-4244 Scope Calibrator.
First up. The 7A16A. Tiny bit of attenuator switch deck noise. That's to be expected. Will clean up fine. Thumbs up!
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
![](https://imagizer.imageshack.com/v2/640x480q90/923/PWdutq.jpg)
Next up. The 7A18A. This guy is solid! Thumbs up!
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
![](https://imagizer.imageshack.com/v2/640x480q90/921/bqsa3F.jpg)
Last one. The 7A26A. Both Vertical position pots extremely noisy. No biggie. It will clean up. Thumbs up!
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
This guy is 200MHz B/W which exceeds the 100MHz B/W of the scope. And all these 'A' version plug ins have read out capability but the scope doesn't. But as shown does not affect their operation.
![](https://imagizer.imageshack.com/v2/640x480q90/922/CN2Nuv.jpg)
I feel like a kid in a candy store right now.