Slewmaster - CFA vs. VFA "Rumble"

Going with all just as it is except using a 2K trimmer will allow lower bias settings with the same maximum bias setting, as set by R104.

Minor housekeeping, but now looking like the attached. There is room to re-integrate the capacitance multipliers (simplified of course). Any value in that or just keep this one simple?

Hi Jason

Great initiative... love your work...

Sorry to throw a spanner into the works at this late stage. Could you think about bringing the MOSFETs closer to the centre line so that they don't extend beyond the board edges.

3" (75mm) heatsinks are readily available so it would be great to have an option to use these. My main issue with the Slew-master/monster OPS is that they require large, expensive heatsinks, which in turn need to be housed in large, heavy, expensive cases.

I would keep it simple and leave the cap multiplier out.
 
Terry, I will find you the part-number - will take some time.
For example, 538-39-28-1043 is the mouser code for a 10-pin plug of the same time, we just need to find the one for 2-pin.

Cheers,
Valery

Thanks.I have been searching like crazy but I just can't find it. I never use that type of connector but the only solution I see here would be just soldering in wires and I really don't want to do that.
 
Hi Jason

Great initiative... love your work...

Sorry to throw a spanner into the works at this late stage. Could you think about bringing the MOSFETs closer to the centre line so that they don't extend beyond the board edges.

3" (75mm) heatsinks are readily available so it would be great to have an option to use these. My main issue with the Slew-master/monster OPS is that they require large, expensive heatsinks, which in turn need to be housed in large, heavy, expensive cases.

I would keep it simple and leave the cap multiplier out.

Thank you. I will see if it is reasonable to make the output devices completely under-board.
 
Here's the Mouser part numbers.
538-39-28-1023 2 pin dual row header
538-39-01-2020 2 pin housing
538-39-00-0078 16 AWG terminal
538-39-00-0060 18 - 24 AWG terminal

OK, I see my folly now. I was looking at pitch instead of row spacing. Very confusing.😱

I'm not sure I like this method. Those plugs work out to over $1 each. I guess with the close spacing I am kind of locked into it. I'll get enough for one board and take it from there.

I just got notice that my boards have shipped so I should see them within the next couple of weeks. I should have all the parts by then too. Then I guess I will need to learn some programming. :smirk:

Blessings, Terry
 
OK, I see my folly now. I was looking at pitch instead of row spacing. Very confusing.😱

I'm not sure I like this method. Those plugs work out to over $1 each. I guess with the close spacing I am kind of locked into it. I'll get enough for one board and take it from there.

I just got notice that my boards have shipped so I should see them within the next couple of weeks. I should have all the parts by then too. Then I guess I will need to learn some programming. :smirk:

Blessings, Terry

Terry, I actually buy Chinese clones through the trusted local supplier - they are much cheaper but still good quality (at least the ones I buy). Probably worth looking on ebay or something...