Not really a DIY activity this one, but just a break with another hobby: photography!
I believe we are familiar with a lot of tubes, but sometime we never see the detail what’s inside. From this moment, I will start to take picture of several tubes that I got on hand, in detail. Probably some will have the heater powered – to give sexier view. Thank to my micro lens, Sigma 150mm/2.8. I believe this is one of my best investment (and upgrade) so far for macro related activity.
We start with my favorite Russian tube: 6N6P or probably we are familiar with its other name: ECC99. It has gold grid, don’t know if it’s a real gold or just gold color.
Nothing special on the top side. I should have powered it to give more interesting photo.
This one is not a tube, but vintage 2SK389. Special thanks to Mr. AW to provide this ultra rare stuff to me and some other colleagues!
The other also quite rare stuff, 2SJ74. Again, special thanks to Mr. AW to share this to our DIY community. I think we have enough ammunition to build another ‘weapon of mass destruction’!