Search results

Technical question: I'm troubleshooting distortion on a McIntosh Mx110Z and wanted to rule out incorrect biasing of the 12AX7 tube (V15) which is the first stage of the preamplifier section. Looking over the schematic, something doesn't make sense. The schematic says that on, say, the right...

By way of introduction, I'm a semi-retired physicist with a long term interest in vintage electronics, especially high-end audio equipment. My introduction to this field was from my father who was a pipe organ builder and hi-fi enthusiast. During the 1950s, when I was growing up, my father had...

I inherited a 1950s vintage Berlant Concertone 20/20 reel-to-reel tape recorder (see pics) from my father. He was a pipe organ builder and used it to record organ recitals when I was growing up. It hasn't been powered up in decades, but I'm seriously considering restoring it. It is monaural...