M49 DIY kit

[mkiijam]

I'm using the "kit" from Oliver's company, and a 5840W tube. What do I do with the unused pins on the tube?

 

[rock soderstrom]

Hi, no idea what the kit looks like (photos?).

The unused pins/leads will be the two Cathode/Grid3 that are not needed. You can connect them to the potential of the active Cathode/Grid3 wire or insulate them with heat shrink tubing. It should be the same, all three are internally connected. What do the kit instructions say?

 

[mkiijam]

https://www.tab-funkenwerk.org/ami-parts/mic-kits/m49a-kits/m49a-assembly/