0 articles Vintage Tube Amplifiers

EICO 2050 Amplifier Test / Pictures

I got an EICO 2050 from a garage sale, after clean up and put the tube on I firstly ran it by a variac for safety. It worked but hums as most vintage amplifiers did. I carefully checked the power transformer primary and secondary winding, the condition is all ok. Also checked the filter capacitors…

McIntosh MC 225 Appreciation with Pictures

My friend bought an MC 225 recently from the local market and listened the good sound quality. Later found that it sounded a bit less punch at low frequency, and all four 7591 output tubes are not hot enough even after few hour playing. I measured the plate current for each output tube were all…