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I was going to wait until I finished the casework, but here's a small preview:
Sonic impressions thus far indicate this to be one hell of an amplifier. I haven't listened to anything else in 2 weeks!
Congrat with your proto, Mazuki !
My proto is much messier due to the use of some off boards parts (large PS filter caps; on the amp, Russian K75 PIO for signal path (C3+C4) caps and huge MKP output caps...). Same impression here about the sound, it passes the "well known 2-tubes DIY hybrid amp" I also have easily ! I'm currenly on business trip and I really, really miss the sound of this amp .
__________________ Marantz SA11-S1 => Balanced β22 => Sennheiser HD 650
Thanks Ferrari! I've been thinking about changing C3, C4 and C5 caps as well. I'm going to wait until I get my case first. Also you are right about Q1, it does get extremely hot. I think I should be able to find another heatsink to squeeze into that slot though.
Hi - attached is my first effort at a headphone amp. It is not quite finished yet - I have to mount the switch and power light properly, and would like to add DC in. I'm just pleased to have made it this far!
People like the tin?
I have been using the amp with my Alessandro MS-1 headphones - sounds pretty good to me!
looks cool man. unique tin - i like it. congrats on getting into DIY, hopefully you'll have many more successful projects to come! oh and of course - welcome to head-fi!
Finished up the prototype for a discrete I/V stage in my Rotel CD. This player uses the standard Philips late '80s/early '90s players (SAA7210 / SAA7220B / TDA1541a). I was trying to get this finished for the Chiunifi meet last weekend, but hadn't had time to do testing, etc., so I wound up not going (should have anyhow...) It sounds really good, much better than any opamps I have rolled through this player. I really wanted to compare it to a G08 or something at the meet.
Mods include:
Shottky PSU diodes (11DQ10 player, 31DQ10 o22)
Tentlabs XO on a PFM Flea board (my own layout), modified to provide /2 direct DAC clocking
Tread board taking ~25Vdc down to 18-20Vdc for the Flea
home layout of an amb o22 PSU for the discrete stage (I needed a smaller board than the o22 at 3.5" x 6.5")
rbroer's less simple I/V for TDA1541a, modified to use 2SA970/2SC2240 transistors, FET buffer per cetoole's I/V stage (I removed this for the time being), and muting relay
home-etched double-sided PCBs (I used tinnit for the first time on these, works pretty well)
! I'm currenly on business trip and I really, really miss the sound of this amp 
.
) It sounds really good, much better than any opamps I have rolled through this player. I really wanted to compare it to a G08 or something at the meet.
Linear Mode
