After my second pair of RE0s has finally kicked the can, I'm looking for either an upgrade or simply a change of setting. These IEMs will be used 100% with a galaxy S3 phone without an amp due to portability issues. I have a pair of DT880s that I absolutely adore, and I loved the sound of the...

Funny thing I found this thread. For a few months I've been working out almost exactly what you're looking at. Currently being planned with the helpful suggestions from jseaber is a DIY-ish (very small components unfortunately, requires a soldering station) amp with the criteria you want. At the...

(in regards to C7 and C8)   Quote:   I used 12AT7 tubes in mine, which have a gain of 60. They run my DT880/600s quite well, but the gain was a bit high (comfortable listening volume at ~90 degree pot turn) so I disconnected C7 and C8 (which were in parallel with the cathode resistor)...

Quote:   It's a strict point-to-point build with a sticky copper foil ground plane. Another notable feature I forgot to mention earlier is a switch included in the potentiometer that isolates the ground of the headphone output so you can turn the amp on and off while having headphones...

I've returned from a lul due to lack of freetime with a completeted starving student amp! Shortly after the arrival of my shipment of parts, I got to work assembling and a mere two days later I had a functioning amplifier! The front and back panels are made from 1/8" aluminum, and the top and...

Recently I purchased an AlienDAC kit from GlassjarAudio and built/tossed it into a mint tin to use with my computer. I don't have any amps at the moment besides a cMoyBB (currently building a SSMH) so I've been using the cmoy as an amp for the DAC. My problem lies with having to run the cmoy off...

Quote: Would this switch work? I see that it has 2A/250V AC, but only 28V DC. You say you used volume pots with switches in them, and I can't seem to find dual pots with switches (on mouser) could you link me to the one you used?   If I did use a standalone switch (to enable/disable...

Another friend of mine is giving me some sockets and a pot, but also has two 250uf capacitors that I might be able to use as substitutes for C7/C8. The BOM says it's to increase plate resistance, but also needs a good cap. Would I be better off without it, or will a 250uf cap work?   Just to...

Quote: Ah yes, sorry. I plan to use the Cisco power supply. There don't seem to be any sockets with that size rated for 50+ volts. I've been looking mainly at the mouser side of the BOM, and didn't see that the digikey side had one for radio shack. I checked on the site and it seems...

The PSU socket is out of stock on mouser, could I get this one that's rated 5A@30v? I'm pretty sure it'll fit. http://www.mouser.com/ProductDetail/Switchcraft/L712RAS/?qs=sGAEpiMZZMu2f9RNbWupYqW6S1LL%252bTeZ9lcjPfOr4HQ%3d

  Quote: So I should just buy all new caps? I'm also planning on getting parts for a grubDAC, so I could grab a couple caps while I'm at it, (though they're also on mouser IIRC.. Probably ordering later today. Should I get a 100K potentiometer or just stick with the 50K?   Thanks...

Quote: In attempt to increase the sensitivity of the pot, could I change R16/R17 from 50k to 100k. Or would that still be not enough? I'm using ATH-M50 36ohm (rated for 32ohm, but I recently measured 36.).   The caps that I got from a friend are all rated at 50v, which include...

After doing some searching [Actually looking at the first page in the DIY forums] I found this thread, which I'll probably use for my design. I just asked a friend, and he said he has a few 12AT7s and sockets, as well as etching resources to help, so I'm in business. I'll probably post a build...

Quote:   Quote: I have gone through most of this thread, from page ~150 to present. I must have skimmed over the speak of an adapter for the PCB. I think I've come up with a few edits to the PCB, but right now they're just drawings. I rotated the 9-pin to a certain...

Comparing the schematics for the 17EW8 and the original 19J6, I've noticed everything is exactly the same, except for the pins on the tube. How hard would it be to just edit the PCB to support the new pin-out?   EDIT: Jesus, the pins are rather muxed up on the 17EW8.   EDIT v2: Sketching...