I totally lied about the break.
The pre-amp board is so ripe for being made modular that we owe it to ourselves to chop it up. If you refer back to the composite schematic I pieced together from the service manual, I think that it would not be unreasonable to chop it up into the following components:
INPUT (pre-amp, enhancer, pre-EQ "DI-1")
PRE-LIMIT (limiter)
EQ (semi-para, timbre)
POST-LIMIT (post-EQ "DI-2", limiter)
SWITCH
HEADPHONES (auxiliary board)
These can easily be made into smaller interconnected circuits to form a basic "INPUT > PRE-LIMIT > EQ > POST-LIMIT" chain with no impact on the outside presentation of the amp. My only reason for really pushing this possibility is that the INPUT board for example, could be replaced by the initial valve stage of the Eden WT-400/800 amps or in fact anything that satisfies the functional conditions of that circuit block. In addition, the EQ block could easily be replaced with the equivalent Eden 3-band "semi-parametric" EQ, the TF 4-band or any pornographic number of cascaded gyrators you want. The switch thing can be sacked off to taste. Limiters of varying sexy design can be patched in. The power-amp is what it is. That could even just go into a seperate unit, especially given my rack fetish. Mmmm. Racks.
*NSFW - contains racks.
http://www.magazineracksforless.com/ima ... ll-200.jpg
http://www.jesseshunting.com/images/rac ... 07_big.jpg
I see this unit as a bullet-proofing of the original AMP version than original work, and rather than just slavishly copying Dave's build approach I think it would be fantastic to build upon what Russ started. Open Source amp y'all!
I like what Eden did to the design in several ways, but the flaws are obvious with some of them translating across to the TF amp also. The PCB-mounted cement resistors are a perennial bitch with Edens. There is no excuse for not using better chassis-mount components like the Dales you suggested. The choice of using an EI tranny in the TFs instead of a Toroid as in the Edens still throws me for a loop. I understand the inrush current is enough to black out the neighbourhood but hell.
It isn't even as though this amp is anything complex or amazing. Just a cursory perusal of the amp gutshots on Talkbass and you see some nightmares that make you want to trace LED TVs including their silicon instead. By eye, drunk. What would be awesome however is a solid meaty amp based on a tried and tested design where it is eminently possible to chop and change it to suit personal taste.
And racks. RAAAAAAACKS MAAAAAAN.
