luvdunhill

I thought that was its input impedance!

Smoke test passed and the new board fits!

It's funny, Nelson Pass has several products that do exactly that - use LM317 as a programmable current source for just a LED.

The 10uF has a startup transient up to around Vout. Probably okay in reality but settles down to Vout-10. The 47uF behave well, and zener and reference voltages should be fine there. I am using 16V on both 47uF and output rail on the rest. You can use much smaller than the 10uF called for and be fine, so don't be too concerned about that value.

The vertical work great with 2mm thick boards. The R/A ones just barely fit. I probably would add a bit of adhesive to make it extra secure.

I can do the math for you, which part?

Why not just use a thermal switch on AC mains? Check out the Cantherm product line at Digikey.

How many years have you been building and selling Audio projects?

Three discrete opamps?

They are a detented pot.

I think it would be cool to actually remove the amplifier circuit from the board and make it modular - plug-in boards for the amplifier section and maybe even the PSU. Would there be interest in something like this down the road?

pcbway supports plated slots.

Nah, those are just small-signal tubes - nothing to see here.

Thanks Kerry - how thick would you venture? Always looking for prototypers I am working on an ultra low distortion all SMD buffer, probably have a layout done in a day or so.

Right, so my question is is how thick of a board can be used and have the plastic clip part snap into the board. I am not as worried about the solder pin length.

Right, but you have to subtract the small standoffs as the entire part isn't flush to the PCB. This makes that 3mm smaller.

I saw that, but it said "recommended piercing plan". I have the part and it's really hard to measure. It could probably work with a slightly thicker PCB. I am thinking Kerry used these connectors and perhaps he used a > 1.57mm board and can provide some insight.

Can anyone look at the CAD files and give me an idea of the maximum board thickness these connectors can be used with? http://www.te.com/usa-en/product-1-770967-0.html Also, laying out a simple unregulated power supply, if anyone is interested, details here: http://www.diyaudio.com/forums/group-buys/297124-ic-yafwpsu-yet-another-firstwatt-psu.html

It's a "loudness" tap.

The same, minus the pasta. But, also got the flu and strep.

Kevin, what typically does one need to drive the clock input of a DAC? This seems to have a lot of circuitry: https://www.ebay.com/itm/281937108477 So, it seems like it's not as simple as buying this and connecting it to to the BNC input: https://www.ebay.com/itm/262634456212

Well, it claims on the front to be vapor(ware), so I dunno...