RCA VT64 ( 800 ) 10W Class A2 Single End Amplifier
Here are RCA VT64 or 800 Triode Transmitting tube in Single end class A2 amplifier.
* Driver tube is 2 stage anode follower , 1 stage is Hytron VT232 ( E1148 ) and 2 stage is RCA 2C22 ( 7193 )
* Interstage transformer is Lundahl LL1671 5K:5K 30mA
* Output tube is RCA VT64 fixed bias to 22mA 380V at plate
* Output transfomer is Hashimoto H-20-3.5U at 3.5K primary
* Rectify tube is RCA 866A half wave rectifier mercury vapor type
Sound >>>>> poor project , only very nice looking but some problem in driver design and interstage problem make the sound to distort at 1.5W level so the sound is lack of high , mid is not clear ..... need to modification
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