kevin gilmore

those are 150 watt switchers?? 24 volts at 6.5 amps ?? they are certainly running under their minimum power specs and are going to be too noisy at such low power... amp only pulls about 400 ma

they have assembly issues. if you take them apart and resolder all the resistors and then carefully adjust the wipers, they should last quite a while. they are shunt devices with only 2 resistors in the circuit at any time, and do sound good. they do however as default have a common ground, which you may wish to defeat.

most likely!

ebay is your friend for stuff like this. get a 100mhz scope to go with it. if you have a Tektronix power supply frame already, these are great http://www.ebay.com/itm/Tektronix-FG-502-Plug-In-Function-Generator-Rack-/111110966177?pt=LH_DefaultDomain_0&hash=item19debacba1 if you don't have the bias set right, its probably not going to sound right.

better change the opamp to something that can handle that like opa445.

don't know about T1, but sounds great on hd800 and lcd2. this amp does not have as much voltage swing as you might expect for something that runs on +/-21v.

it the source is true balanced with no ground reference then unbalanced output is not going to work with a high impedance pot as that is the only source of ground reference. This amplifier is a true differential amplifier in this mode.

are you using a se input or a balanced input? last time I checked, it was supposed to work all 4 ways.

fixed silkscreen http://gilmore.chem.northwestern.edu/ksa5psorig.zip

original version was cascading zeners. which is not really fully regulated, but has been evaluated to be ultra quiet, noise levels in the 50's of nanovolts. the second version is fully regulated, but may or may not be as quiet. krell produced both versions. the first version with lower voltage zeners is suitable for the squarewave. the second version you would have to change 2 resistors.

yes that is black and white ebony. amboyna burl incoming red mallee pic posted in kgsshv thread

zebrawood is something different. https://www.cookwoods.com/lumber-site/shop/category/wood-by-species/

the squarewave boards are single channel. you need 2 for stereo, 4 for balanced

actually I was thinking the singlepower klone.

Typically those things are at least 500 acoustic milliwatts or more. Very fucking loud.

What's the sensivity? May have the perfect amplifier

The inside piece and the blind alignment and the hole smaller than the 4-40 set screw are loads of fun. Have to indicate everything to .0001 hole in the wood only .045 just barely big enough for the allen key.

http://gilmore.chem.northwestern.edu/knobs4.jpg

introducing the .... KNOB OF BIRGIR http://gilmore.chem.northwestern.edu/knobs4.jpg only my second absolutely perfect ebony knob out of piles of ebony. birgir's birthday present for his ecp L2. and a black and white ebony blank from a very overpriced 3 x 3 x 12 piece of ebony guaranteed no cracks with 2 actual cracks, and which I will be able to make no more than 4 knobs out of.

that he could do himself.

I am going to make a rare appearance at work tomorrow to finish The big guys birthdays present

well if you already start on the floor you have less far to fall when you get knocked on your ass if you make the mistake of touching any of the high voltage wires

shrunk kgsshv power supply board available to anyone that wants them, but lil-knight has them so boards will be available from him.

http://gilmore.chem.northwestern.edu/knobs2.jpg http://gilmore.chem.northwestern.edu/knobs3.jpg finished Arizona desert ironwood knob and Hawaii burl red mallee blank with interesting voids

if its the original version of the power supply board, take out the current limit transistors on the power supply board for both the positive and negative supplies.