| Klein + Hummel Telewatt VS70 - VS71 | |||||||||
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Klein + Hummel's origin is the development and manufacturing of very high quality studio equipment. Many parts and units found in the hifi gear are derived from the professional equipment. Many output transformers are of outstanding quality. Later they made a legendary hifi tuner, FM 2002.
The VS70 or VS71 is maybe the best German Stereo amp made in the 60s (do not forget the Melpic 35). Frequency response and tech data is state of the art. Using the "Fernregler" connector the unit can be used as preamp or power amp without any modification.
The VS70:
This amp uses 6 ECC83s in the preamp section and 2 ECF80s as drivers. The output tubes are 4 EL36 tubes.
It sounds very nice. The output transformer is grounded between the 0 and 4 Ohms tap - so be careful when switching or testing!
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VS70 with metal cabinet |
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VS71 with wooden cabinet |
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VS70: inside view from above |
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VS 70: inside view from below |
VS 70: back view | ||||||||
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VS 71: The 71 was the successor to the VS70. The circuit received only minor changes, but among the years the EL36 were changed for EL500, then for EL504 and finally for EL5000s. Four of the ECC83s in the preamp section were changed for ECC808s.
The later version offered two additional input level adjustment pots. Now there were six (!) pots to adjust bias, balance and hum balance of the output tubes and there drivers.
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VS71: inside view from above |
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VS71: inside view from below |
VS 71: back view | ||||||||
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