Here is an interesting, low powered SET tube amplifier from Bulgaria...
"All wires and passive components are high quality and have been chosen after long hours of listening tests and upon the feedback from our clients. Electrical parts from Pentod LTD and Exproject. The power transformer is made by Bultraf. It has got high parameters which determine its great performance.
Regarding power filtering: It is made with two separate independent „circle.“ NOS Svetlana 5Ц3С a very good rectifier tube. For each „circle“ filtration is standard for this type of amplifiers “CLCRCRC”. Тhere are two chokes 6H 150mA. Filtering capacitors: Epcos, Philips, Roe and ather depending on their purpose.
The output transformers are made in Bulgaria by me. High quality, Italian transformer cores. I guarantee good quality workmanship with my own hands and knowledge.
The input and output terminals are gold-plated and of ordinary quality. They are made very precisely and produce marvelous sound.
The volume control is 24 steps (50 Кohm). Fine and accurate adjustment of the signal in both channels."
The calculated output power is 4,2W / 4 Ohm and 8 Ohm.
Actual measurement are 3,8W / 4Ohm and 8 Ohm.
Power supply transformer : 230-235V 50-60Hz 330W
Power input : 110W
Weight: 16,3 kg
More parameters and measurements upon purchase.