kevin gilmore

The delrin extension is what i had in stock. Aluminum works fine. The knob gets as hot as the rest of it. Its unlikely that people are going to listen to this thing 12 hours a day, and the anodizing is going to definitely get rid of the heat. On the original, the knob got very hot too. The 2sc3381's i have measure a diameter of .020 and i reamed the holes out to .0205 will go find some 2sj109's to measure.

Don't waste any 2sj109's. Not sure of the lead diamater on those, will measure when i get home. The 2sc3381's definitely fit, but are super tight. Which is why is reamed the holes a bit before shipping the boards.

need to figure out why the frequency labels don't show up... ? they do on the screen... this works http://gilmore.chem.northwestern.edu/eqgraph.jpg

i'm pretty sure this is correct. http://gilmore.chem.northwestern.edu/staxeq.pdf

dact mounting bracket (or other pot) http://gilmore.chem.northwestern.edu/dactmtg2.jpg

Knobs are going to be $35 each with the anodizing ( i used a big chunk of aircraft aluminum) and machined them .0001 per pass.

And herein lies the problem. Correctly made transformers that don't ring are a real problem. Only way i know of to do it really right is to wind the things yourself.

craig gets chassis #7

jgazal gets chassis #6

nattonrice gets chassis #5

OK struts... you will be chassis #4 You did not respond to my PM, so your knob will be black like the rest of it. If you want a different color knob, let me know before monday. Spritzer is going to be making engraved nameplate things...

Voltron has spoken. You want one or both chassis this time?

just goofing around... 2 inch diameter teflon, black delrin insert, each knurl individualy machined. (lotsa machine time) http://gilmore.chem.northwestern.edu/tknobbig.jpg 4 chassis and 6 knobs should ship on monday for polishing/finishing. Then in about 3 weeks when they return, the first 4 people who speak up can have them. Birgirs chassis is now in iceland at customs... Stax jacks still next week, and angle bracket for the DACT (just finished measuring and designing it, same stuff as the heat sink angle pieces) The pot which just showed up one month later from birgir is one of the pots for the kgsshv. (damm that volcano)

that is what sound cards and software are for...

well its line level in and out, so a tweeked version should work for planar magnetics

Its going to be tuneable. And all analog. Eventually it might end up as pure dsp, that is going to take a while.

I now have 9 sets of heatsinks done, 15 sets of fronts/backs done 8 sets of tops/bottoms done (in addition to the 3 sets of everything already shipped) going to do 6 knobs tomorrow and a bunch of stax jacks (5 and 6 pin) next week. 2 chassis with knobs should go out for finishing on friday or monday. Spritzer gets a different color knob. Only thing left to do is measure for and make the mounting brackets for the DACT. Unless i decide to do something stupid like making aluminum feet. Or titanium feet, or some other very silly thing. Gold/platinum with or without diamonds available special order

Those caps need to handle 600 volts DC. So anything that fits that can do that works.

Not balanced he doesn't...

Yet another stax project soon. A lot of people are going to want this i think. Birgir knows what it is, and had better not drop any hints hint: diffuse field.

You definitely NEED 20 gauge for the filament wires ! And a 16 gauge wire for the master ground.

I found an even better place for wire, i have the link at home. I think this is it. http://www.bulkwire.com/wire-cable/ptfe-high-temperature-stranded-wire.html One other thing, if you contact the ebay seller and ask him for a special 10 color package, he will do it for you. You really do want teflon insulated wire rated at 600 volts. So the measured distance between the transformers is exactly 3.75 inch which is a tad over 97mm If you use the hole .5 inches in front for the center transformer, its 3.95 inches. But that might be too close to the board, will look later.

I'm going to add a second opinion that the 3D21 is a good tube for this purpose.

84 va out, 97 va in i'll measure the mounting holes on the transformers, 97mm might fit, but all the wires will have to go over the transformers. Take a look at the power supply pictures.

The heating element is wrapped and insulated with asbestos. You really don't want to mess with it. If you are desperate to have it fixed, take it to a shop that will fix it, and let them worry about the hazards.