The net result is a small monoblock valve amplifier that will deliver 5.8 Watts RMS from just below 10 Hz to 44 kHz within 0.2 dB. Other changes include the use of AC heaters and revised component values and voltages on the SRPP driver. This transformer is now also available to individuals from Edcor. The other change is to use the power transformer from the bigger amps (EMO-719).

In a push-pull class-A ultra-linear amplifier using EL84 valves they excel. They are custom designed to my specifications by Edcor and while OEM to Oddwatt Audio, I asked Edcor to permit sales to individual customers. This is especially true in the case of the audio output transformer. The biggest differences from the original project is in the output and power transformers. The mini blocks are more powerful than the Poddwatts and seem to have more detail while retaining all the good characteristics of the Poddwatts. This is true, but there were a number of what seemed like small differences that caused some surprising end results. Clever observers will note that each of the mini blocks is a whole lot like half of a PoddWatt amplifier. Since this hobby doesn't always have to make sense, that is what I built. Maybe, but I have so many amps now that it doesn't make sense either. A pair of small push-pull amplifiers was next on the list. Since I have many preamps now that didn't really get the nod either. A preamp perhaps could be built on one of the chassis. But since I didn't have any suitable single ended output transformers I nixed that idea.

They are just the right size for lots of things. Two small chassis about 5 inches by 9 inches by 2 inches (12.5 X 22.5 X 5 cm) were just begging for a project. I had a lot of extra parts lying around (really a huge amount of them) and tried to figure out what I could build. It has been a while since I did anything really crazy in DIY and had it work out far above my expectations. Mini Block Ultra-Linear Class-A Push-Pull EL84 (6BQ5) Valve (Tube) Amp

Mini blocs