Whoops! Wrong tube

[Randall]

Accidentally plugged a 6V6 into a 5Y3 socket today. After correcting my foolish error, it powered on but made some bizarre noise, like a car trying to start with a almost dead battery. I powered down and did some tube pulling and swapping to try to see what I may have damaged. I got some noise for a bit during this, but then it stopped. Now it is working with all the original tubes in it. I had just replaced 3 filter caps before this happened. I don't understand what happened here, as when I first put in the 6V6 the symptom was no sound because nothing lit up. Seems like if it damaged that 6V6, it would still be damaged, but it doesn't seem like it is.

oh BTW it is a 1951 Bronson that I have no schematic for.

[eschertron]

Compare the pinouts. What voltage was applied where on the 6V6? What stresses would that cause?

[Randall]

It looks to me like there are only open circuits on the PT secondary and filament winding when plugging in a 6V6. That's why I am confused.

[nosaj]

It looks to me like there are only open circuits on the PT secondary and filament winding when plugging in a 6V6. That's why I am confused.

Is pin1 used as a tie point for anything?

nosaj

[Randall]

Good point. I don't know. It's buttoned up now.

[nosaj]

Good point. I don't know. It's buttoned up now.

On Pedro's amp it looks like there might be something but I'm not real sure.
nosaj

[eschertron]

It looks to me like there are only open circuits on the PT secondary and filament winding when plugging in a 6V6. That's why I am confused.

I don't have pinouts at hand, but I'm thinking that even without current flowing, you may have exceeded some inter-electrode voltage ratings. But if it works now, then no harm done?