kevin gilmore

ssdynahi more than happy to take se input and convert to balanced

the 180 has a different chipset and will not work. the bdp80fd is also known as a 170 or 160 outside the usa and works

a standard S22 would smoke at 3 amps at 30V

bought a pioneer bdp80fd brand new for $300 from b&h people should buy them now before they are all gone. SO MUCH EASIER than Piece of Shit overheating version 3 garbage and if you have a modified PS3, time to dump it before its worth absolutely nothing. also have tested 103,103d,105,105d in case you have one of these. even with the multiregion hack, still works

ss dynahi and its easy to modify the gain. what's not easy for most people is all the chassis work. The same people sell the boards and all the parts for a price that I cannot even come close to in the usa.

http://www.ebay.com/itm/Finished-KG-AMP-Kevin-Gilmore-full-balance-Class-A-headphone-amplifier-/222118780512?hash=item33b74f9e60:g:l7wAAOSwxfNXOFC3 better everything, assembly,design,specs and about half the price

i don't think its going to make any difference except that it will make it easier for some builders to introduce shorts, or fancy resistors leaking to ground etc.

mwl168 wanted a amp board with the ground plane, i have posted 2, the second one looks better. no other changes, all the parts in the same place, same size,same number of holes etc. second version routes the servo around the top.

Has anyone heard the liquid carbon and the liquid gold side by side?

super nice

birgir is about to release a new bi-directional power cord system for people like astrostar59 its absolutely unique, nothing else like it, hand made in Iceland. both 110v and 220v versions available, solves once and for all the directionality of power cord issues. here is a picture of the 110v version bi-directional iec female not shown

are you completely out of your mind, that would take me a week. ok, here is something quick that gives you the idea 4 x lm741 at different gain levels why it looks like crap and the background is not black, not sure and resulting phase

and a pair of matched and isolated digital voltmeters, very hard to do with one

a graph is in order here so that people would better understand whats going on. unfortunately I can't think of generating a quick way to do this, I took 6 of the kgsshv schematic at different levels and tried to sim at the same time but the software hung. may be able to look at this again late tomorrow. if someone else can do it so much the better. because I think that most people are not going to understand without a picture.

the psaudio is still referenced to safety ground. So its not going to protect you from line voltage induced death. A whack from 220V is still nasty. the capacitors in the power supply will still be able to kill you. No question about that. So if you don't understand how to set the currents and then adjust the offset voltages, some extra reading/looking at the board pictures might be a good idea.

I posted this over there, will post here. if I had time I would find to do a way to do the graph that shows frequency response relative to output voltage, maybe in a few days if people don't get it so here is how this works Required Slew Rate = 2 x π x Frequency x Peak Voltage x K we can argue about K later, different people have different ideas about the value.The load is a capacitor and it takes a particular amount of current to charge/discharge the capacitor at a particular frequency and voltage. Lets reference the maximum peak to peak output voltage of the amplifier at 1khz as 0db. Now lets calculate what amount of current is needed to do 20khz at 0db at the same peak to peak voltage into one standard headphone load, 120pf Now lets figure out (and this part gets complicated) how much more current is needed to guarantee .01% thd at 20khz at 0db. taking into account the open loop gain. Its clear that some of my earlier amplifiers with output currents in the range of 5ma to 10ma cannot do full voltage swing at 20khz. But will do a full flat frequency response at less than full voltage swing. So the question is how loud do you listen and how much actual audio content is at 20khz relative to 1khz. It is my opinion that 20ma however is enough to do full voltage swing even with 500V power supplies. 2sc4686,2sc3675,2sc5466 etc, cannot do more than about 10ma before they eventually blow up. Even with lots of heatsinking. And ixta3n120 has so much output capacitance that even with impossible current numbers it could never get there from here. Cree C2m1000 however can run at at least 30ma at 500V power supplies, is ultra low output capacitance etc. So is the current flavor of the decade output device, till something better comes along. A couple of people think that the carbon is a bit bright at 20ma, and have turned their units down to 18ma. This is one way that the amplifier can be tuned. The performance of an el34 at 20ma begins to effect the lifetime of the tube. Significantly. emission labs 20B work fine at 20ma, but have a stupid price and questionable long term reliability. There is no free lunch.

Seriously.... WHY? lipstick on a pig is far more appropriate.

I've talked to a couple of people on this and their answers were pretty much the same. If you are doing fluids and trying to do laminar flow, then great. For audio, pretty much a gooseegg. It probably does sound a bit different, but not for those reasons.

dan wants the male stax plugs, which are slightly more work. And printable with a $800 3D printer. any machine shop will happily make them for you out of teflon.

yes you can modify any of the power supplies to do that.

First 4 relays are opposite polarity from the second 4 on the max4820 boards. Yes all 4 of them in series, so 32 bits to write all relays.

not a fully balanced fully differential fully discrete one that i know of.

it is not illegal to own more than one amp. however it may damage the universe if one person owns more than 50 amplifiers (electrostatic,dynamic,speaker amps...) I think I am one amplifier away from that. And the ssdynalomini should put me over the top.

of course its hand solderable. you just have to find the right set of hands. preferably robotic.

fine, cram the new digital attenuator in there. should be enough room.