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Posts by Porksoda

Desoldering braid, a $25-$50 cheapie multimeter, some sort of stand with a clip holder on it for holding wires or small boards, and the best soldering station you can afford. EDIT: Oh yeah, wire strippers
Quote: Originally Posted by Eagleboy I believe the reason for the amp only having a 2-prong power cord is the fact that in 1968, most homes didn't have grounded outlets. So, the design was more out of necessity. I did find a schematic though. If this isn't my exact amp, it's darn close. I'm at work right now, and don't have access to my amp, but it seems to be the right model. Also, the amp hasn't been on in about 4 months (I'm not allowed to have...
Putting even a 10k pot in front of earbuds that are no more than 32 ohms would result in virtually no signal actually making it to the earbuds. Even if you could get a pot that was low enough impedence, line outs aren't designed to produce that much power.
My understanding is that silver solder flows better with silver plated wiring. Other than that, I think it is a waste of money. Unless of course you are doing DIYFP, in which case people will happily pay extra just to say their amps have silver solder in them
I don't know of any reason a diamond buffer couldn't be biased into class A as much as you are looking for. A simple tweaking of the first stage bias current and the ratio of the emitter resistors should yield the results you are looking for.
Hey All, One of the drivers in my modded 125s started rattling a while back, and in the course of taking it apart I seem to have broken the driver. I was wondering if anybody else has had a similar misfortune and would be interested in either selling me one of their drivers or buying my one remaining good driver. The driver is from a 125, but has had two modifications. I put in an improved screen like that of the 225, and I installed a 2-channel sub-mini jack on the...
Gah, I forgot to pop back on and thank you guys for your help! I never got into hte eBay scene, so no I didn't try them in my initial search. I ended up buying this copy: http://cgi.ebay.com/ws/eBayISAPI.dll...3012&rd=1&rd=1 I just barely got this in time for christmas so I only got a quick look at it before I gave it to my pops, but when I first took it out of the box I was a bit disappointed. The record was placed in the jacket next to the inner sleeve, not...
Hey All, I am trying to find a recording of The Planets, featuring Stokowski conducting the Los Angeles Phil. My dad said he used to have the recording when he was a young man, one of his favorites, but he lost it. The particular pressing he had had a cover with a nebula and Stokowski's head superimposed over the nebula. In any case I am trying to find a copy in good condition, preferably vinyl, and I don't even know where to start looking. Advice would be...
Quote: Originally Posted by jwb Thanks for the advice. I don't think I need the caps in the current mirror with the devices I'll be using, but I plan to put the pads in for that if it turns out to oscillate in practice. I guess the main thing I am sweating before finalizing my drawing is base current cancellation. I don't think it can be ignored totally. For example, the current in T7 will tend to be about 98% of the current in T2 (assuming hfe =...
No reason. We focused more on the overall design, and not so much on the implementation. Caps across the cascoding LEDs would probably help with distortion at high frequencies, and putting a cap between the current mirror's bases and their respective power rails would probably help prevent oscillation. I recommend you take your queues from Malcolm's paper about where to add capacitors, and of course determine WHY the capacitor is there and what the impedences are in...
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