• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Good looking tubes

Re post # 18 AHHHHHHH!!! Kittens!! There's always one.

One of the reasons I like building valve amps is the aesthetic appeal of the humble valve.They're works of art not to mention cunning artifice. When they glow a nice colour it's even better. Some bloke said it better "what is life if full of care if you have no time to stand and stare" Staring at pretty glowing valves is like staring into a fire; there's something atavistic, a deep calling to our souls. Still, if someone disagrees, that's cool. What we like defines us, what we dislike too.

Andy.
 
i like "glowing" tubes; the Eimac 35TG is an example.
This nice transmitter tube/triode sounds great and looks the part when switched on.
Only 5V/4A filament.....but with B+ (800+ V) the anode comes to live properly.

Of course this will be dwarfed by the GEMA TS6, a German radar tube from 1940-194, which has an interesting filament requirement: 2V/31A (no joke; the filament is in fact a set of parallel ribbons !).
A collegae is trying to built an amp with these; i'll keep you posted.
For comparison a TB04/8 (is the same as the VT191 but with a 6A filament) is next to the TS6.

Regards, Reinout
 

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My space heater/amplifiers.
My space heater consumed over 500 watts of power to make 2 X 30 watts of audio from a pair of 211's or 845's driven into A2 by 45's in a prototype TSE board. This was built about 20 years ago before the TSE or Tubelab the company existed. My construction quality at that time was scrap pine boards, an old street sign left in the yard by a hurricane, black spray paint, and sheet rock screws. It put so much heat into my little room that even with central air conditioning and the window AC I could only run it for an hour or so before the room got too hot to be in, especially in the south Florida summer. Eventually I decommissioned it and stole its power supply choke. Now than I have moved 1200 miles north it's heat would be useful since it has been below freezing for several days with several more to come. Sadly, it has not seen power in over 10 years. Someday I'll fire it up and see what happens.
 

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My space heater consumed over 500 watts of power to make 2 X 30 watts of audio from a pair of 211's or 845's driven into A2 by 45's in a prototype TSE board. This was built about 20 years ago before the TSE or Tubelab the company existed. My construction quality at that time was scrap pine boards, an old street sign left in the yard by a hurricane, black spray paint, and sheet rock screws. It put so much heat into my little room that even with central air conditioning and the window AC I could only run it for an hour or so before the room got too hot to be in, especially in the south Florida summer. Eventually I decommissioned it and stole its power supply choke. Now than I have moved 1200 miles north it's heat would be useful since it has been below freezing for several days with several more to come. Sadly, it has not seen power in over 10 years. Someday I'll fire it up and see what happens.
I also have a pair of 845 monoblocs with 96Watts on the plate and high voltage but it overheat the living room. I've downsized to a more manageable 100-150 watts per mono blocs X 6 been a 3 ways active system.