kevin gilmore

No reason to remove it. No reason to hide anything. Put it back if you wish.

Standard power supply caps are 50mm... So if you pick the ones in stock now that are 63mm then it isn't going to fit into a 3 inch high case. (vertically)

Yep F1. At least i think its the F1. I have a real nelson pass unit around here somewhere. Same as Recstar has. All of my speakers are way to hungry to run with something like that, so its really just a balanced output headphone amp. And i like the dynafet better for that purpose.

Yes its going to be very tight in that case. Also remember you need input and output jacks, and an input power jack. If you push the power supply all the way to the transformer, move the transformer up a bit, use the thinnest ac input jack you can find, you should have enough room on the other side for xlr jacks.

Have the top end one from about 2 years ago, stopped using it because it did a lousy job. Have the one specifically made for garages, the mechanics got so dirty inside after about 4 months that it completely crapped out, sent it back for repair, got a second one that lasted only another 4 months. Expensive toys.

First watt is a current source. Sounds absolutely fantastic with some speakers and headphones. Sounds horrible with lots of other stuff. Highly inductive speakers for example typically blow the fuses.

silly boy... http://gilmore.chem.northwestern.edu/melos.jpg

there are so many design flaws in that thing i don't know where to start. but the biggest one is using the filaments as the current source for the output stage. Once you hack that out, and run the tubes the normal way, and use a real resistor for the current source, lots of problems go away.

I sure hope there is going to be enough booze for the people showing up...

I'm sure there are payment plans. There will be one extra chassis in the final batch, which i won't have polished or anodized till the beginning of january. Its really nothing compared to the pile of parts.

tobacco does evil things to audio gear. especially the high voltage stuff.

http://gilmore.chem.northwestern.edu/su7300.pdf

found the exact schematic. The 3 amp fuse is in fact the input power fuse and is a fast blow. The 3.3 amp fuses are slow blow and are the amplifier output fuses. So anything <= works fine. xba1f30nu100 is the 3 amp powr source fuse xbas1a3301 is the 3.3 amp output fuses

Yep, gave the board files to someone that is having a small run done...

There is still one complete chassis set with boards available.

With chu's permission i could do just about anything. Including all the library as html instead of php.

I would not be caught dead with a green checkered doily under my equipment! I stay away from the 440 volt panels... And i saw the new 14.4 KV panel that drives the transformer for my new building. Stay away. Stay very far away.

I've been testing 9 volt batteries the same way for over 40 years. Don't know where i learned that trick. Its not the size of the battery, Its the voltage divided by the resistance of the load.

Neither do i, but i fake it real good. I wish i had taken pictures of the high voltage flyback testing setup that zenith radio had 30 years ago. 6 inches of foam, 1 inch of plywood all off the floor, workbench and everything on the plywood, no grounds anywhere, all test gear isolated with massive isolation transformers rated for 75kv... I'm glad i never had to mess with that setup.

I don't see the forum part of it ever being active again due to serious security holes in the implementation of the database and php. Mostly the php.

The warnings about high voltage with significant amounts of energy storage are very real. This power supply has more storage at more voltage than a heart defibrillator. The story on the guy with the voltmeter is complete and utter bullshit. For one thing the simpson 260, of which i have 2 brand new in the box uses a total of 1 x 1.5 volt D cell. The older ones have 2 x 1.5 volt D cells. The maximum amount of current this meter can deliver on the low ohms range is about 1 ma. This is not enough to kill no matter how hard you try. On many of the DVM's however, there is a 9 volt battery, but once again these work on a current source principle, and even on the low ohms range the maximum current is 1 ma with a 1 volt maximum. 5 volt maximum on the diodes range. The best rule on this is insulated shoes, and one hand behind your back at all times. Safety glasses also a real good idea.

headwize and my other sites will be down starting november 26 thru the 28th or 29th due to power shutdown to wire in the power to my new building. Also down december 29 thru january 1 to finish the job.

Whats this with left channels of amplifiers screwed up... Ask Absorbine Sr. for details...

those are the 8 pin dip sockets. you need two for the amp board and 9 for the power supply board. 808-AG11D-ESL-LF Tyco Electronics / AMP IC & Component Sockets another version of the bom with additional part numbers http://gilmore.chem.northwestern.edu/t2parts3.xls

use these for the fast diodes DSEP12-12B Ixys Rectifiers turns out the answer was actually in the kgsshv thread make absolutely sure you get the teflon tube sockets. unlikely that anything else will fit. use these for the octal sockets and i have extras of these if you want them, but ebay is cheaper CONNEX Socket 8-pin, Octal (KT88, 6550, EL34, etc.) and like this http://cgi.ebay.com/Machine-made-Teflon-tube-socket-8Pin-KT88-EL34-6SN7-/220565777104?pt=LH_DefaultDomain_0&hash=item335abeaad0 use these for the 9 pin sockets CONNEX Socket 9-pin, (12AX7, 12AU7, 12AT7, 6DJ8, etc.) i don't have any extras of these. http://cgi.ebay.com/Machine-made-Teflon-tube-socket-9Pin-12AX7-6922-6H3-/220565777143?pt=LH_DefaultDomain_0&hash=item335abeaaf7 will try to locate the other parts tomorrow. Resistance is Futile. See kgsshv thread.