Pre-amp for a NYAL Moscode 300?

I had a Moscode 300 many years ago until one of the resistors burned out. The company went out of business at the same time. I was able to get the unit repaired by its designer, but I do not know if he is still doing such work. I used a Berning TF-10 preamp with it which worked fairly well. I would not want to use a solid state preamp with it, unless it was a very smooth and rich sounding solid state preamp. Despite NYAL's hype about its "tube-like" midrange, I subsequently found the NYAL to sound more like a solid state amp than an all tube amp.

I forgot to mention that I had my unit modified twice. The first mod was to upgrade it to what NYAL called the Maxi version. This was done by a dealer-Landes Audio in Chester, NJ. The second mod was done by George Kaye and it involved changing the tubes and some other things he was working on. The first mod improved the sound. The second mod made the amp significantly more revealing and changed the tonal balance to the point where I had to upgrade my preamp from an old solid state Sony ES (similar sound to an unmodified Hafler) to the tubed Berning to compensate. George was using Spendor loudspeakers to voice the amp at that time and my loudspeakers did not have the same tonal balance as Spendors. Another dealer once recommended the Melos preamp as a synergistic combination with the Moscode but I am not sure if Melos is still in business. If you did not receive the owners manual with your amp you are missing part of the fun. It's the most unusual owner's manual I have ever seen. It gives some interesting advice on how to enjoy your system.