The KillerDAC Audio forum
General HIFI => Amplification (Pre/Power) => Topic started by: Tasdevil on January 07, 2018, 01:22:13 AM
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Hi, I'm a new member here although I did post occasionally on the old forum. Anyway I'm a good friend of Steve ( I think! ) and he wanted to see some photos of my new amp ( probably to bag it ) so here it is. It's a Tektron 2a3/50s power amp made in Italy. It has a switchable filament power supply so you can use various triodes like 45's, 2a3's, 300b's and 50's etc. Cheers.
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Nice Peter you devil, Interesting amp people because its can use 45s 2A3s and 50s but how does the maker do that. Obliviously there is a filament switch for 7.5v and 2.5v but running 350 volt measured at the tube when the 45 can only handle 250v in globe or ST form is interesting.
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Hi Steve, here is makers take on using various triodes : yes you can use with 45. Of course. Must only use low current.
WIth 275 V or 300 V must set current at 30 mA like indicated in the manual..
why? because the limit of tube are 9W dissipation and 250 x 36 = around 9W.
if use 300 V x 30mA = 9W.
So if you want can use 45 max current 30mA.
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Hi, I'm a new member here although I did post occasionally on the old forum. Anyway I'm a good friend of Steve ( I think! ) and he wanted to see some photos of my new amp ( probably to bag it ) so here it is. It's a Tektron 2a3/50s power amp made in Italy. It has a switchable filament power supply so you can use various triodes like 45's, 2a3's, 300b's and 50's etc. Cheers.
Good friend with steve? I guess anybody with valves is a good friend now days :D
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Looks nice. Is that a Leak stereo 20 on the floor?
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Hi Rab,
Yes it is, I use it to drive some Quad 57's. Sounds great.