Carbon composite in place of carbon film

[TinCanAlley]

Originally Posted by DaveWM

yep, with tvs you can only go so far with voltage readings, wave forms are were its at. put it back together and get some screen shots showing brigtness and the jail bars again.

Scopes are handy but expensive for a good one, you can get decent later models for around 100$ but you risk it not working, case in point my scope just took a dump on me so now I have to fix it.

Yeah, most of the scopes I've found listed for a decent price are either broken or untested (untested=broken most of the time). I can't really justify spending a decent amount on something I might use one or twice. I have a closet full of stuff like that already.

I'm attaching a pic of the jail bars and brightness. The brightness is greatly improved with much more available range, so that seems resolved. The jail bars, however, are still there and quite noticeable (even in lighter scenes). I've replaced the two 100K resistors, the 33K and the diode. None had any effect.

I have the scope's build instructions and I can go over it. If I'm not mistaken, this thing has tubes in it. I'll take them out and test them.