Eico HF89 Tube Amp, Sylvania GE TungSol Built By Roger Hug

  

Built by Roger Hug d. 2019 top quality components throughout. He didn't want it shared until he was gone. When Roger and I discussed how this amp would be built we agreed on several principles. Set the engineering adjustments to make performance be solid, but not overdriven. The EICO design allows the change of the single 12AX7 to be a simple method of adjusting the amp's personalty, or flavor. To this end, I will provide a smorgasbord of 12AX7 tubes so any tube rolling won't demand bias and plate voltage adjustments. Rebuild and revitalize all of the components. If you know what you are looking at in the pictures, you will spot the evidence in the "underneath" pictures. Otherwise, retain the original outward aesthetic.

EICO equipment presents as laboratory, rather than a triumph of modern design for a well-heeled audiophile shelf. This has FABULOUS output transformers. Make smart choices in internal components. Insure the character of the amp's performance, also insure that it will age with grace.

This amp operates equal to or better than factory specifications. 53 watts per channel, clean. Power tubes were NOS when installed. >Sylvania fat bottle 6CA7 (EL34) with matched spare. >Sylvania 6SN7GTBs (included as set 2). >Extra 12AX7s: GE, Amperex, Mullard, Sylvania, RCA as "tube rolling" tone variety. Yes, this is my "Holy Grail". Life changes, we must adjust. At the moment I'm trying to gauge interest. REVIEW PICTURES & ASK QUESTIONS.