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Everything posted by kevin gilmore
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Pass Electrostatic Headphone Amplifier
kevin gilmore replied to johnwmclean's topic in Do It Yourself
that one line at diyaudio will cause tens of thousands of hits worldwide that will circulate forever. sweet. once someone actually builds it, they are probably going to find it does not perform as they might expect. dc levels before the output caps are going to drift like crazy. The 5M and 10M resistors may simulate well, but the real things are loaded with capacitance and inductance, and in practice not going to work as planned. -
We all know a person who built a T2 as his first project ever. Then built a second one. Then built all sorts of stuff. And has not looked back since. But probably not a good idea for the timid.
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Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
there was a group buy of boards. all gone now. lil-knight seems mia at the moment, if that continues, someone else will have to do the next board run. -
The Ultimate DIY Part 2 ? The KGITSOJC
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
PMBFJ177 is equivalent to the piece of shit cavalli is using in his overpriced pieces of crap and it sounds like absolute dogshit too. designed for switching use. not for analog audio. -
The Ultimate DIY Part 2 ? The KGITSOJC
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
where is the p-channel to go with it. -
Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
that kid is a little to old for singlepower tube rolling. for the megatron, since the tubes are stacked, and the grid bias really is pretty close, it really would work. -
Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
sure why not do the singlepower tube rolling. as long as someone else does it. I have a large box of singlepower tube rolling disasters. el360, and other things that cannot, or should not work. The EL156 is something that actually should work. Subject to a very large bottle sitting on a very flimsy adapter. What bad could happen. -
Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
edit: the adapter wires the tube as a tetrode, so it would be completely plug and play. -
Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
trivial and almost instantaneous buy some tubes, and use these http://www.ebay.com/itm/1PC-EL156-TO-KT88-10Pin-to-8Pin-Vacuum-Tube-Convert-Socket-Adapter-/221235762073?pt=Vintage_Electronics_R2&hash=item3382add399 requires slight rewiring to add g3. as for the 13e1, those are brutally priced -
birgir could always use cavalli. Tie him to the hood like a dear. But first he would have to do a Hansel and Gretel on him. The guy is pathetically thin.
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he needs extra dead weight in the trunk for winter
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Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
one chicken on each of the 4 x 6c33's -
Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
This will warm you right up. So will the thing blubliss just finished up. he should post a few pictures. He could cook 4 complete chickens on that thing. -
looks real to me
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The Ultimate DIY Part 2 ? The KGITSOJC
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
well there is this http://gilmore.chem.northwestern.edu/sqss1.jpg I'm not going to finish the ultimate preamp till a reliable source of audio grade complementary jfets is available. Too many fakes out there to design with old stuff, and linear systems is a bunch of incompetent fucknuts. But I do have a working one on the bench. It has to be a jfet input otherwise the input impedance is too low and the bipolar parts have too much offset with high impedance sources. -
KnobFeel - reviews based purely on the feel of the knob
kevin gilmore replied to Grahame's topic in Off Topic
i think only one of those were ever built -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
not sure what software you are using, but this board file is the same as every other one I have done. may not be compatible with some panelizing software, but have produced thousands of boards with the software I use. -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
http://gilmore.chem.northwestern.edu/rk27quad.zip -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
like this http://gilmore.chem.northwestern.edu/rk27quad.jpg -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
is each section 10mm from the next, and hole size or a pdf of the quad pot -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
does not work with some sources. ends up with a dc offset, or causes issues like eddie current has with the electra -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
i can whip up a board if you want to have some made. birgir has boards for the alpha pots -
if you can unsolder the power supply electrolytics from those 5 or more layer computer boards, and the caps still have 2 wires sticking out of them, then you are ready to work on stax.
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The connectors on this RAL cable are anything but audiophile grade. The cheapest of the cheap, plastic insides. I did fix the cable but the thin silver has a resistance of .250 ohms on each wire, double that of the original cable. amphenol part numbers L77DE09S L717DE09P printed right on the shell. http://gilmore.chem.northwestern.edu/dsc_0514.jpg this is what they should be using which has machined pins and high temp polyester instead of the super cheapass thermoplastic http://www.newark.com/itt-cannon/demm9p/connector-d-sub-plug-9pos/dp/37P0488?in_merch=Popular%20D-Subminiatures and none of this .925 stuff. we need the real thing http://gilmore.chem.northwestern.edu/silverbar.jpg this is the powder http://www.shop3m.com/3m-ceramic-microspheres-white-grade-w-610-1-gal-sample.html
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the original krell db9 cable is wired with stranded 22 gauge spc wire. one wire for each power supply and 3 for ground. correctly soldered and heatshrink on the pins. the morons wired all 9 pins with 24 gauge wire. with something higher in resistance. and at 400ma that makes a defference! monsterslayer sells pure silver wire at rational prices. even 9 wires 22 gauge total length of 18 feet is less than $30. so maybe $75 to make a better cable plus an hour of labor. my guess is that tom is going to get a replacement stax mafia cable that performs correctly and is way better built. minus the magic pixie dust. real cryo treatment a no cost option. 77K. now if tom wants 4.2K that is going to be expensive.
