I was in the U.S. Air Force in the mid-80's, heavily into electronics, doing component level maintenance (changing out tubes, transistors, capacitors on various equipment), protecting the country against the U.S.S.R.
I don't remember how I heard about the Dynaco, maybe because they made kits, sort related to my line of work at the time, from that I heard about Frank, I still don't remember how, it could be from the Audio magazine. I was very skeptical at the time, yeah right, someone building some state of the art good sounding stereo equipment in his basement, give me a break. I called Frank and got his catalog, I read about his product, but still had the "ha ha yeah right" attitude.
I got shipped out to Germany in the early 90's, I went on a shopping spree at the Rhine Mien audio club. Hey everything considered high end in the states were half price over there, so I spent thousands on big amplifer, and an Adcom GTP 565 preamp (top of the line, and Stereophile liked it). B&W 801 were $2600 a pair over there, but I didn't buy them, still kicking myself today.
I listened to this system for years, but somehow something told me that they didn't sound right, but since I spent big bucks on them, so they gotta be good, I thought.
Then one day, I remember Frank, and decided to give his product a try. I bought one of his 13 year old used preamp, it needed some work, but after that, I was basically impressed by how it sounded. Then I bought one of Frank's top of the line 10 year old used amp on the internet. After that, Frank's product remains in my main system, and my mega buck system that I bought oversea becomes dust collector.
I hope Frank will never retire, so he can upgrade my system when I am ready.