cobra_kai

Does anyone have a recommendation for a good, reasonably priced input tube, something on the order of the winged c output tubes?

I've actually never even seen lead free solder. Only used 60/40 or 63/37

^^ Does Johnny Depp have a celebrity headphone?

Why don't you do a balanced beta 22 it's more on the level of a dynahi than the M3 is.

I got a response from them about the heatsink, apparently the heatsink itself is manufactured in China and is rather large, then they must mill it down to size. See this image: They said they could sell it to me machined down. I'll ask them how much it would be for the same size they are using, in quantity of ~100.

lme49830 is not TO-220 http://www.ti.com/li...nk/lme49830.pdf Anyway I emailed the guys who make the thing in that picture to see if they are willing to tell me the part number. Fingers crossed they are nice...

Justin I thought the video of the laser engraver in action was pretty cool that you posted on HF, If you have more videos of the process of stuff getting made I think a lot of people would find that interesting.

Been doing a bit of searching for a heatsink, it seems that Aavid heatsink is the reference one that national lists. I found a site with a picture of a heatsink that looks really good but haven't been able to find the part number for it. Here is the picture though:

Hmm he took the picture down...

I did notice it has the same 11 major hashes as the one people are using for the off board KGSSHV. He spelled electrostatic right though

I think he means using the on board heatsinks but simply mounting the board itself vertically on the side rather than horizontally on the bottom of the case. In which case that should be fine, but your case is going to have to be something like 7+ inches tall. The heatsinks won't work as effectively either as they are designed to be vertical. Also the heat from the bottom row of sinks will rise to the top row and heat them up.

Surely that can't be serious...

Bonus points if you can mention the words 'air,' 'separation,' 'not subtle,' 'blown away,' and 'smooth' at least 30 times in the review.

If I remember correctly that was done so all the transistor leads would be bent the same length. While of course nothing bad will come of using the pads with them, they are not necessary. I'm not sure why it was done in the PSU - maybe just precautionary? Anyway they don't need it, otherwise my amp wouldn't be playing sweet music right now

FQPF8N80C are isolated so they do not need the ceramic pads. Same with the 2sc4686.

1.25 for 0-9, 1.05 for 10-99. For those that are interested in my FPE files please PM me with an email address and I will get back to you.

Never bought anything from them but these guys have them for $1.99: http://netsemi.com/p-486758-bipolar-small-signal-npn-transistor-220nis1-pls-plnn-ac.aspx. If you are willing to wait for mouser they have over 1000 on order now, but you will be waiting a while...

Ah yes you're right. For some reason I assumed they were one and the same.

I don't think he's doing any research anymore... http://www.wired.com/gadgetlab/2010/09/segway-death/

Not exactly sure how to post the files, but anyone that wants them can pm me with an email address and I will send them to you.

Mine sound pretty damn good out of my single ended beta 22. Which is something like 3.5 watts into 50 ohms

Very nice article, I wasn't aware that there is such a large number of these headphones. I think the short run down on each headphone is a nice way to give a quick impression about what a headphone is like. I'd like to hear the M/V-80 now.

Lol, that's 2500 watts or so. Absurd. So it can swing pretty much all the way to voltage rails and isn't current limited into low impedances? In that case even a +/-40V or so power supply for 4 channels would drive almost any speaker pretty well.

Wow mouser updated the lead time on the 2sc4686a, it is now 20 weeks with an estimated ship date of June 8 2012

$1.5 million sounds extremely low thats like 300 SR009. $15 million sounds much more reasonable.