Triple 245v Valve Amplifier

 Single Ended Power Amps

The Triple two four five amp is powered by 3  X  UX245 valves in a Parallel Single Ended configuration and driven by parallel twin triode 5691 RCA red base the rectifier is an old favorite U52 . Each of the 45's is set up with its own cathode bias and each coupled to the preamp tube via its own coupling Capacitor. With this configuration, we were able to achieve a whopping 5.6 watts RMS.

UX245 valves are known for their wonderful presentation of the mid-range. With three tubes it will even satisfy those who like weight on the bottom end and the top end is amazingly clean and natural.

Specifications  

Type Single ended

Valves Per Channel

 

 

3 X  UX 245
1 X  5691   

Rectifier

1 U52/5U4

Power 5.6 Watts RMS
Frequency response 30 to 20,000 Hz

Taps

 

8 Ohms

 

16 Ohms

 250 Five Valve Amplifier

 Specifications  

Single Ended Power Amps

Type Single ended
Valves per channel

1 UX250

1 6sJ7

1 6SN7

Rectifier U52
Power 3.5 Watts
Frequency response 30 -20,000hz
Taps

8 Ohns

16 Ohms