justin

he asked me how to wire the jacks at CanJam, which means he had never plugged a headphone into an amp design at that time. jamato's thread was a few weeks before that: Who knows what the pin out is for Stax and Sennheiser electrostatics? - Head-Fi: Covering Headphones, Earphones and Portable Audio

final scores? Current Score: 124 Best Possible Score: 124 out of 192

The GS-X also has a 3 way gain switch, which effectively triples the number of volume levels with a stepped attenuator

I think you're forgetting the AC voltages. you could do it but you'd need 8 tubes total if you want to use 5687 (parallel both halves of each tube) and 4 floating highly isolated filament supplies. hmm where have i heard this before. anyway, if there is a separate heater supply for the top tube, ignoring the AC voltages, i think it would be OK as in you're not going to hear about it if a tube breaks, it will just get replaced, unless it takes amp/PSU components with it and then can't be repaired...like that other amp

I already had a pallet arrive yesterday and they had to leave it in the street

That's because when someone becomes part of Team Electrostats, their days on head-fi are numbered or they've already left. I believe that the biggest impact Ray's amp will have is showing electrostats to new people who just follow the popular trends, now that the issues with their weak bass have been resolved. It won't be long until someone says "My headphone doesn't fit in this big round thing with 5 holes in it!"

KG has some of that, and then he thought i stole it from him

An issue with using a SRPP output stage with an electrostatic amp is that SRPP amps are designed to drive a static impedance, which is why you usually see them as INPUT stages on amplifiers where the next stage will always have the same load, such as the next tube's grid resistor. An electrostatic headphone is a capacitive load, so you have to do some tricks to properly do SRPP with it (see here: The Tube CAD Journal,SRPP Optimal Rak Value 2) What this means, if you do not do this properly, is you could have a frequency response that varies greatly depending on the capacitance of the headphone, maybe a bell curve shape. Even setting the "Rak value" for a certain capacitance may not be enough if the capacitance varies widely between the different makes of e-stat headphones. When I looked into this concept I thought of adding a switch to set it for different capacitance headphones, but why bother, just use a resistive plate load on the tube or if you want more gain wire the top tube as a current source

Not true billy...although balanced all the way may be the most pure, there are many ways to convert an unbalanced signal to balanced. Most amps just use a differential amplifier to do it

not hard, but to make a good one, you're just putting 2 amps and 2 power supplies in 1 big box. and it would be expensive and would never be taken seriously as a reference quality amp for either electrostats or dynamics

An electrostatic amp with 12AX7 front-end (5751) and 5687 outputs has been shown on Tubecad before. KG, i would assume its paralleled sections of 5687 like the Stax 007t before assuming it's SRPP. I looked into using SRPP for the output stage of an electrostatic amp, but you have to do some tricks to set it up for a capacitive load and at that point it doesn't make sense to use it...lots of info on that on tubecad as well

on the Maestro were the headphone out and pre-outs the same thing?

GIVE ME SOME SHIT TO DRINK

edit: but we dont know if the wall-warts were the original PSU

All of the wall-warts in the SS1 had fuses soldered to their boards, but they were too large to blow

would i have to include the 500 Amp charging adapter?

ok i got it, i just looked away from the screen so i could only see it in peripheral vision, and then it had switched to the other direction

ok whats the catch, its only spinning clockwise

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sorry for the off-topic, but to give an idea of the size required to make a decent stax portable, figure about 5W which allows +/-300V and 1mA for each output stage (compared to BH which is +/-400V and 20mA output bias). That would be a life of 27 minutes if you used a 9V nimh battery

have you read krmathis's demands on this? It must also be the same size as the Pico, which can't even fit a Stax jack on the front panel, creating difficulties.

Current Score: 76 Best Possible Score: 124 out of 192 can still get 1 of 2 in final, and the winner

HE60 to Stax jack adapter

no need, i just found some

Looking for 4x unmarked white tube boxes that fit EL34s. They measure about 1.3x4.4".