Dual99v500 mic pre BUILD THREAD

[Joe Malone]

NOTES & ERRATA
None.

Link to Dual99v500 Build map
https://jlmaudio.com/builds/maps/Dual99v500Map.html

Link to FetDI500v3 Build map
https://jlmaudio.com/builds/maps/FetDIMap.html

HPF PCB assembly before fitting and soldering to 4 pads under Dual99v500 PCB

HPF PCB 640 1.jpg

HPF PCB 640 2.jpg

HPF PCB 640 3.jpg

HPF PCB 640 4.jpg

HPF PCB 640 5.jpg

HPF PCB 640 6.jpg

HPF PCB 640 7.jpg

HPF PCB 640 8.jpg

FETDI500v3 assembly before plugging onto Dual99v500 PCB

FETDI500v3 640 1.jpg

FETDI500v3 640 2.jpg

FETDI500v3 640 3.jpg

FETDI500v3 640 4.jpg

FETDI500v3 640 5.jpg

FETDI500v3 640 6.jpg

FETDI500v3 640 7.jpg

FETDI500v3 640 8.jpg

SET PCB SOLDER LINKS FOR 500 or 51X series

Dual99v500 500 solder links pcb.png

Dual99v500 500 solder links cut off 51X pins pcb.png

Dual99v500 51X solder links pcb.png

[Flatman]

Hey Joe
Managed to get the Dual99 built today, and thought i’d mention a couple of things,

1) There’s no mention of the Red 48V LED in the build docs, I didn’t notice until I had all the boards together and face plate mounted, that there was an “LED” shaped hole, with nothing in it. I pulled everything apart and managed to engineer a solution, see attached photo, hope this is correct, if it is, feel free to use my photo in the build docs.

IMG_6989.jpeg

2) The build photo for the DI board shows a Flat blue LED, however the kit came with a standard round blue LED, I installed it the same as the Flat LED in the photo, but was wondering what it is actually supposed to do, is it supposed to align with the hole in the back of the socket? I couldn’t see a way of engineering it to do so, if it is. see photo attached of my final install.

IMG_6992.jpeg

3) There was a short length of green wire in the kit, but it is not mentioned in the building docs or shown on any photos. I was wondering if it was to be used to ground something, but i couldn’t see anything obvious. Or is this just another one of your tricks to stuff with us OCD folks, aka 8 resistors and only 7 places on a board. As I am not one to leave anything uninstalled, see photo of my final green wire installation.

IMG_6990.jpeg

I haven’t powered this beast up yet, waiting on resolution of the above.

[Joe Malone]

Hey Joe
Managed to get the Dual99 built today, and thought i’d mention a couple of things,

1) There’s no mention of the Red 48V LED in the build docs, I didn’t notice until I had all the boards together and face plate mounted, that there was an “LED” shaped hole, with nothing in it. I pulled everything apart and managed to engineer a solution, see attached photo, hope this is correct, if it is, feel free to use my photo in the build docs. IMG_6989.jpeg

With pcb upside down the back of red led should hook on the edge of the pcb and then with pliers bend the legs above the 2 pad holes and trim them 5mm after the bend so the led sits above the pcb about 5mm. Anode long leg is the one closest to the edge of the pcb.

2) The build photo for the DI board shows a Flat blue LED, however the kit came with a standard round blue LED, I installed it the same as the Flat LED in the photo, but was wondering what it is actually supposed to do, is it supposed to align with the hole in the back of the socket? I couldn’t see a way of engineering it to do so, if it is. see photo attached of my final install. IMG_6992.jpeg

The New DI sockets no longer have the clear back panel to shine the blue led into so you can find the socket in the dark. Place the 3mm blue led into the hole on the back of the socket and bend legs to get them back to the solder pads. This led is only to light the socket slightly so from the front in the dark you can see where to plug into.

3) There was a short length of green wire in the kit, but it is not mentioned in the building docs or shown on any photos. I was wondering if it was to be used to ground something, but i couldn’t see anything obvious. Or is this just another one of your tricks to stuff with us OCD folks, aka 8 resistors and only 7 places on a board. As I am not one to leave anything uninstalled, see photo of my final green wire installation. IMG_6990.jpeg

The green wire solders on the front of the HPF switch and back to the top of the output pot switch housing to make sure the toggle has ground on it.