GrindingThud

I'm a Chesapeake sailor. This is from one of our races earlier in the year:

Yes, JB weld has better conductivity. It does not conduct electricity, it is an insulator. I may use that on the other board...got a bunch of it.

I'm assuming that a little super glue and a shrink wrap blanket is ok for jfets?

I'll post pics as I go.

I did on the other two. Only the amp units had all the holes....I mounted it on the PS board for fit. I'm thinking of putting it in this single chassis: http://www.diyaudio.com/store/amplifier-chassis/full-width-40mm-heatsinks/standard-amplifier-chassis-maximally-vented-4u.html

But it was so much fun. I bought long enough screws to use nuts on the back. I'll fix it prior to assembly.

46 M3 taps later.....I begin to wonder why I wanted offboard sinks (yes it will be on the other side when assembled):

Try this:

Yea, that's what I'll probably do for test until they come in.

Did you have any luck locating a 47uf ceramic? I've been hunting and can't find one greater than 10V.

Cool

//edit// Found the 1N914 above.....never mind. Very cool board, thanks! ------- What are all those little diodes on the board? Jumpers? gt

Thanks! I should have checked for a new version 1st.

What that N channel on the board that drives the relay? http://gilmore.chem.northwestern.edu/protector.jpg http://gilmore.chem.northwestern.edu/protector.pdf http://gilmore.chem.northwestern.edu/dynapower2.jpg

I've got a bunch of BC546B left over from the Dynahi PSU, would that be suitable in this circuit?

Should be plenty of room in the case, I'll need to get one of these built up. . Might try and squeeze one in my dynalo build too. Thanks.

Should I have one of these on the Balanced Dynahi, or is it ok to run without one?

Werd

Woogawooga

Do this: http://www.diamondstar.de/transistor_matching_jfet.html Make sure Idss meets spec. Very easy with some alligator clips, ammeter, and 9V battery. Works well. I was able to sort out a mess of 2SK170-BL for another project. Had an epic fail procurement on my 2SJ74-BL.....out of spec Idss, but I may have enough to do what I need.

Just ordered for my second SuSy Dynalo set.... Looks like this affects the KSA5 clone also.

Ok, this one has thrown me for a loop. The board I have is different from the schematic and the layout...so I'm thinking I just don't have the right version drawing. There is a spot on my board for a resistor not in the BOM, 40KDT, which I assume is the 20K dual tracking one mentioned below. The is also one labeled 10KLO (R15?) that does not match location in the schematic which is what is confusing me (C13 is bypassing 10K on the schematic vs 20K on the board). Do I leave the 10K one out? Looking at the board, it seems the 40KDT (R16?) is correct, R15 is 20 and the 10 comes out.... Rained all day....been matching transistors... http://gilmore.chem.northwestern.edu/dynahipowerschem.pdf http://gilmore.chem.northwestern.edu/dynapower2.jpg

Ok, finally got boards now to go with the sand. Looks like they match this: http://gilmore.chem.northwestern.edu/dynahibal1.pdf Have a couple/few questions: The amp is 2011 Version 1.0 boards (offboard sinks)....anything weird or incorrect on the silkscreen? I've read through the various threads and think everything should be correct, but just checking. Are there advised mods? The PS is version .1 and I think I need to either cut a trace and add a resistor for the current limit or just leave it out....which is recommended? For headphone use, can I get away with one PS board? I have two but trying to make this as small as possible. What is a suggested part number for the little pins I see people mounting the 2sc3381/sa1349 in? Thanks in advance! gt

Sweet!

Were the inputs grounded (or the pot installed) when making the measurement?