I've been interested in your amp designs and have been considering buying one of the EL84 tube boards, especially after one of the Texas Bottlehead meetings where the amp wowed a bunch of guys! see:
http://www.wardsweb.org/LSB/08_09_03/Houston44.html
and
http://www.wardsweb.org/LSB/08_09_03/Houston28.html
But, economics are winning out, I'd have to pick up all three transformers, etc., and well, I just happen to have two HF-89's that need restoration sitting around!
I pulled out the least scroungy one and spent quite a while looking at it today, looking at online parts suppliers, looking at the schematic, and came to the conclusion that I'd just as soon as start with a new chassis, machine a bit larger chassis, 17" X 14" instead of 15 X 11, etc., etc., and that's gonna be a lot of work!
Since I have read all the posts on the DIY Tube forum, I knew that you have been working on a clone of the HF-87/89 and wondered how far along with the project you have gotten. I figure that if I am going to have to start from scratch that I might as well do it with a circuit board setup!
I'm interested!
In the past year and a half I have built one of the Sound Valves VTA-70i that I got off of ebay without transformers and a set of the Bottlehead Paramours.
See: http://rblank.home.texas.net for more details, and
http://www.wardsweb.org/LSB/08_09_03/Houston28.html for their recent field trip!
Now that I have done the Paramours, I am ready to tackle something else...ergo, the HF-89's!
How's the progress? IF I am going to have to buy everything from tube sockets to resistors, might as well start with something new.
Thanks for the forum and the great work that you have done with the EL84 amplifier kit.
Rick