We wanted to build a Rare single ended amplifier with more power, & we choose the GM-70 triode, it is a strong and stabile tube for audio, which is alone on the market, and NO other builder makes the same!
We have to build a PARALELL connected for reach the much power in a SINGLE ENDED mode. There are some GM-70PSE on the internet, but all had DIODE retifiering for the high voltage GM-70. We know the tube rectifiering with high voltage is harder to build than a diode circuit, but the sound is more natural & detailed fit for a single ended triode.Build a full tube rectifier circuit for a PSE GM-70 is not an easy job, it need more experience of the transformer’s design/calibration, circuit developing. Our new GM-70 PSE is an amazing amplifier, we spent a lot of time for developing, and building the the prototype & the producing unit. I have to tell you-the result is an UNIQUE GREAT SOUNDING high power Single Ended tube amplifier, which could drive Electro / MagnetoStatic speaker too. The expert knows what I mean, here are the spec:
power: 45 watts
freq:15Hz-58000Hz at -2db
UBrumm 1-1.2mV
TDH: at 0 “ZERO” feedback 0,21%-1Khz
TDH: at 22db feedback 0,03% -1Khz
input: 0,5V/45watts
