luvdunhill

That old tech. Okay, let me think about it and will PM.

It's this one: http://www.audiolab.co.uk/product-detail.php?pid=9 I will cover shipping - just need to get this out of my closet It's worth trying, even as just a preamp or DAC - not to mention the disc spinner. It is a John Westlake design (Peachtree Audio and other companies).

That reminds me - I need to sell my Audiolab CD player. It has easily the best Sabre implementation I have heard. I would be willing to let you try it out if you are interested - it's been sitting in a closet for years now.

I agree with the SK approach!

Transformer voltages are always stated under load.

Flight delayed from Detroit due to wind. Glad it is only that, but should be a fun takeoff.

Decreasing the ballast resistors could happen as long as Vgs is really close. You could maybe experiment with unequal ballast resistors on the n and p side. I wouldn't mess with it though.

It is nearly impossible to match n to p with these. Even the ones I sent were from multiple tubes of each.

It was a role model indeed

Made some more permanent modifications. First, couldn't get proper length hanger bolts, so shaped the bolts post cutting by holding them with my fingers on a bench grinder to emulate Steve's finger Then more pictures without comment Then when I got to one of the holes, there was no resistance in the drill bit. Ignore the hole on the right, which was the final hole, but found out the plinth isn't solid and the power switch wire is routed this way. The factory foot nearly pierced the wire!

Wonder if there will be a "Heavy Flow" and "Light Flow" variant?

"When"? They do make a pill for that...

It's easy enough to do in software, but I wanted to control the optoisolated switch directly. I think these chips are perfect for the job.

Yup!

Just curious, has anyone ever used any hardware switch debouncing before? I realize this is 100% unnecessary / overkill in this situation, on all kinds of levels, but I am going to play around with a few of the Maxim chips in this rube-goldberg-esque circuit

Time to add a load

What load are you testing at? I would assume both High and Low impedance would be preferable.

Thanks guys. Another question, would something like an Analog Devices ADXL335 be sensitive enough to help tune a motor to minimum vibration?

Anyone in the US happen to have a strobe I could borrow for a while? I cobbled together a DIY one but would like something to compare to. I should have both 33 and 45 patterns at 60Hz on the Cardas test LP, so just need the blinking blinker.

Chris, those parts are made by FCI. Search for BergStik. They are rather nice board to board connectors. Actually, what is hanging on the USB is a cheap USB serial uart bridge, based on the CP210x. You can get them on eBay for a few dollars. It makes for a nice multiplatform software option, as you can get Mac, Linux and even .NET support. There is a three wire connection to an Atmel microprocessor. Well, now I can change he phase of the outputs via software. To Now the question is how to convert a frequency of the output sine wave to rotational frequency of the platter. That seems to need some maths. Oh and here is the four pin DIN cable that has way more parts to assemble then it needs. It's kinda nice spring loaded mechanism when it's all said and done. It will interface directly with the connector on my Rega turntable. Crazy Brits.

Cool, so are the ferrite beads needed, or have you tried to remove them?

Ok, added holes and screws. Next need to make a cable, perform some turntable modifications and then the software side of the project.

They cause you to sprout hair and wear a speedo?

Thats the middle setting 78 = 45 + 33? Not really.

Just a few more holes here and there - need a fuse holder on the rear panel, then four PCB mounting screws and the transformer - hoping to get the mechanical stuff done during the three-day weekend!