Any Head-Fi'ers out there using the Bottlehead S.E.X. amp for their headphone amp? I've made some of their other stuff and really liked it. I haven't done the S.E.X. amp because I already have a tube headphone amp. The Bottlehead community and pro reviewers are posting favorable feedback, but...

I have some MP3 files that I would like to convert to another format (I'm not sure what) that I could burn to CDRs and play in CD players that are CDR enabled but not MP3 enabled. What do you guys use for this? Does it work with big MP3 files (like those converted at 192kps, or even higher)...

There's been some debate about comparing equivalent priced CD and vinyl decks lately. Thought I'd share my recent experience. I have pretty good ears and a CD rig that I'm pretty happy with. Sensitive speakers, 300B monoblocks, and a tube preamp, all of my own making, that I have tweaked out...

For reasons I won't bore you all with, my power supply is, on some days, feeding 17-18 volts (each side) to opamp amplifiers using OPA chips like 2227 and 2134 or 2132, rather than the usual 15 volts. I seem to recall the useable voltage ceiling for these chips was 15 volts a side. I haven't...

I’m getting ready to upgrade my MG Head DT by putting a pair of constant current sources (CCS) on the plates of the driver tube. As long as I had to disassemble the amp to pull the plate load resistors and put in the connecting leads for the CCS circuit boards, I did a couple other mods I’ve...

Mr. Lau: I'm considering replacing the plate load resistors in two of your amps with constant current sources. I need to know the plate current for these tubes. But my calculations (based on the schematics you supplied with these amps when I bought them) don't seem right to me. They seem too...

Any of you guys know the car cd head unit market? I need something better in the sub$500 category (plus a couple hundred more for new front speakers). I'm looking at no-rear-fill-no-subwoofer-no-outboard-amps-no-way! Not to be grumpy -- it all looks like really cool stuff -- but my existing...

Joseph, I have a pair of AV8 monoblocs. I'm quite impressed with the quality you've packed into these $99 USD amps. I've also had a lot of fun modifying them. Does the filament secondary on the power transformer supply enough current to allow rectification? I would like to add a bridge...

Apparently this bears mentioning. If you have an MG Head and you have the urge to so much as touch the wires or wiggle the switch even the least little bit to do something about the power switch buzz issues: UNPLUG THE UNIT FIRST. The wires contain pure household AC. The ends are not...

For those of you wanting to get rid of your volume pots completely and try series attenuators on the cheap, this is what I use, and what many others have tried with success. Mouser Part No. 10WR212, 12 position two pole shorting rotary switch. $3.12 Mouser Part No. 71-RN55D-F-[value]...

ppl, I seem to recall that a while back, you posted something indicating it was possible to trickle-charge multipacks of nicad AA's at low current using a resistor, instead of a chip setup? I'm thinking about a series of 20 AA nicads @ 1.2 volts/600 microamps each for 24 volts at 600...

To carry over a subject just brought into discussion before our recent and unfortunate interruption . . . If anybody wants copies of my Excel spreadsheets with the frequency response curves for the MG Head (plus a few other miscelanous amps), email me at videoshielded@my-deja.com