Recent content by Hexis22

Although it’s nice to have all output devices from the same lot and matched specs, it’s not necessary as the emitter resistors swamp out component differences and promote current sharing.

Yes, +/- 84V rail voltage with 120V AC input looks correct. Party on…

You now need to change your username to “New Model ONE” from “Vintage 700b”

Are you running balanced or single ended inputs?

Cylon meters, plenty of room between the back of the meters and the cap hold down plate on this Series II build with a WO chassis...

Nice work. Don't forget you need to lace in two 22AWG wires to fused B- (plus a ground) to feed the Cylon meters. See below for recently completed 400 SII with two Blue and one Black 22AWG to the left of the control board. It's easier to add them now rather than waiting until after placing...

A few comments: - Check the wire lengths on both left and right boards. - Right board has wire lengths very short and most likely must be updated: - GND_IN1, GND_IN2 - Fused_B+_IN Now is a good time to add a Green wire to the right board at Fused_B+_Out for the DCP board.

Very nice! Glad to see another Model ONE making music out in the world. Interesting to see the size comparison to a 700B, the power supply toroidal transformer within the ONE is massive (along with twice the capacitance of a 700B).

I can probably help with a full WOPL rebuild, send me a note to further discuss potential timing.

You tend to get the hang of it after your first 30-40 backplane boards…

Doug, First, thank you for posting your build pictures, it's always interesting reviewing other peoples experience building these projects. Having said that, my day job has been crazy busy and I have not had the chance to post on this forum lately. Overall your progress looks very good and I...

My weapon of choice, Weller WX2 200W 3mm tip. Although tip mass is important, I find fast heat recovery time more important when soldering high mass components into PCB's with large area fills. Very uncomfortable contortions and hand techniques required to place the iron tip all the way around...

Agree, soldering PEM nuts to the backplane boards ranks right up there with removing 40 year old thermal paste from heat sinks.

Much better!

The switch appears wired correctly. You should measure open between C and NO pins while the button is out and shorted when button pressed and latched in.