I have no problem with releasing the gerber files for this project. The problem is that I had to work with the board houses to make sure there were no plated through holes where the TO-3 parts are. So I think the gerbers are accurate from a manufacturing perspective, I had to be certain with board house that they were done right, and a couple of batches were not and had to be redone. So someone could potentially lose a lot of money trying to reproduce the boards, or at least , make an expensive en devour trying to get the amplifier together.
These are Nelsons intellectual property with only real changes made where to make the board modular.
These are Nelsons intellectual property with only real changes made where to make the board modular.
I ran into this exact same problem with my combined VFET2/CSX2 OS boards. I ended up including two drill files and that seemed to help.
I actually 'only' need four sets (8 boards OS+IS) and put me up for five to get the GB going
Luke - 1 pair of FE boards only.
RainfallSky - 1 pair of FE and Output boards.
Telstar - 1 pair of FE and Output boards.
dsdjoy - 1 pair of FE and Output boards.
sorenb - 4 pair of FE and Output boards. + 4 pair of FE
arky - 4 pair of FE and Output boards
zeroalbedo - 1 pair of FE and Output boards.
@teabag what is the timeframe for kicking off the GB?
Luke - 1 pair of FE boards only.
RainfallSky - 1 pair of FE and Output boards.
Telstar - 1 pair of FE and Output boards.
dsdjoy - 1 pair of FE and Output boards.
sorenb - 4 pair of FE and Output boards. + 4 pair of FE
arky - 4 pair of FE and Output boards
zeroalbedo - 1 pair of FE and Output boards.
@teabag what is the timeframe for kicking off the GB?
I can do it in one week I think, if I get a fair amount of boards.
I can keep the price static if I get 10pairs (20 boards) or each ordered and then eventually sell. Need at least half that to not cry to the bank hoping to sell the rest.
I will put up a spreadsheet, and you can pay at anytime. (PM or leave email in spreadsheet) and I can invoice you. As long as there is enough momentum in one week I will order them and have a little extra stock. Keep in mind if you do not have dual pairs, and are using a single pair, please don't hussle me for the changes in the design. I have not even looked into the published design for one pair, as I am happy with the dual pair I have and don't have extra heatsinking or time to play with a single pair set. If someone wants to edit the schematic here ( as it applies to this board set - what to leave empty. Please feel free to add.
Check signature for spreadsheet shortly.
I recommend ordering the Pin kits directly, although they cost an arm and a leg. I am going to check to see if the TO-3 cans are available still, and if anybody wants them. I have a couple pairs left. There are spots for the To-247, so not a big deal.
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17x2 FE Boards
12x2 OS boards ...probably hard to sell extras, as they require VFETs ...not sure if there are any to-3 subsitutes? those mentioned by Papa are to-247 afaik.