Leaderboard

One of those (work) days But San Rafael’s Farmers market delivered with Roast Pork, Chicken (fat) Home Potatoes and token Brussel Sprouts

The front fell off.

Breakfast this morning

Monday was my Son´s 14th B-day.

The current 007Mk2 is excellent and an upgrade over the Mk1 really (once port modded) and that would still be my top choice. The only ones which can reproduce the full range without any issues. The top end on the current Mk2's is improved and amps like the Carbon means they are not dark at all. The 009's are too bright and even when fitted with EP-007 earpads they are just grating to me. The earpad change has helped though, they are now more dynamic and not as uninvolving as the 009's have always been. As for the 009S's, they are growing on me with the older 009 earpads plus I did some small tweaks to improve the sealing. They are still bass deficient but at least the top end doesn't make me want to cut off my ears... It's nice open top end and with the older pads they have a bit more focus which the stock setup really lacks. While I've been digging around in the 009's (both sets) I just wonder why Stax did certain things. Why isn't the housing more substantial? Why is that crummy glued on bit next to the cable entry? Wasn't there some better way to make a baffle than this hackjob?

octopus and green peppers ... something light for dinner

Once I’ve tested everything, we can run a group buy.

Here's the accompanying board for the GR HV & LV supplies. It's got a built-in controller to turn the HV on after a delay (if needed) along with a power LED indicator (flashing to solid). I've also added a tap for both Normal and Pro bias.

I was able to get the 450v supply up and running. I did have one error on the board. The current source feeding the 10v reference gets up to 150 degree F, but I can add more copper around it. I think it will be just fine. I was running this with a 110mA load.

Here's the HV version set to 450v. Have to test this one still.

Mini and micro versions of the gr78xx supplies...

Here's one for Joachim It a low voltage version of the GR78xx Micro. It's only .45"(W) x .8"(H). It can run from 5V to 20V (with the right parts). I still need to do the negative. Here's what it looks like... I also re-did the layout of the larger version that can support up to 50V now. I can also do a supply that accepts these regulators, but pretty much any board designed for the LM78xx/LM79xx should support them.

I'm getting better with Eagle, so here's an updated version of the GR78xx boards (still need the GR79xx version). This version supports higher voltages and more current (some infamous designer wanted that ). The board is the same size at .8" x 1.16". GR78xx.xlsx GR78xx-Gerber.zip And some pics...

Mouser parts here - http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=497a265867

20V and 0.46A, twice. About the same power as T2 output stage. In the palm of your hand.