06-03-2015, 08:36 PM
I'm late to this post, but from what I recall none of the "red case" Hickoks respond well to using a solid state substitute for the 83 tube. I will go back to some references and see if I can find more detail on this.
I have maintained glass tubes in my 800A. However, I did successfully sub a solid state replacement for the 5U4 in my Precise 111, and after recalibration it does very well, especially when testing high-current-draw tubes.
The Hickok 800 is a good tester but not a laboratory-quality tester, it is important to know that when testing tubes.
I have maintained glass tubes in my 800A. However, I did successfully sub a solid state replacement for the 5U4 in my Precise 111, and after recalibration it does very well, especially when testing high-current-draw tubes.
The Hickok 800 is a good tester but not a laboratory-quality tester, it is important to know that when testing tubes.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
