Recent content by nickg

Yep, its a dual rail supply, I tried a three rail one, but the improvement wasn't worth the extra cost and size. It basically a +ve and-ve version of the two box supply we do for things like the SB Touch. Two stage regulators, first one a simple off the shelf one, second one is a descret one...

Just in the interest of accuracy, its not a AC supply. It provides +ve and -ve regulated DC lines.

Its bridge rect, cap, choke, cap, then dual CCS feeding VR shunt tubes, and then to each channel. Total current through the choke is about 60ma, the shunt regs means the choke isn't entirly needed but seems like a good idea anyway :-)

Well, to be fair, getting the RIAA right was one of my goals, which I why I thought I should pass a comment. Its very easy with a small plateau shift in response to end up with a dark or bright sound. Equally important I found was making sure the response was matched between the two channels.

Hi, I have been trying to stay the observer in this, but the comments about the RIAA may be worth talking about. Both in Spice and measured on the bench (using a inverse riaa filter) I would be supprised (though it would not be the first time) if the eq was 1dB or more out. The resistors in the...