Just finished this G9 build.
I used off the shelf PSU's that I had lying around for the power. 48V and 250V.
I used Factory Automation cables rated for 600VDC. Really nice, really cheap and pre-built.
The PSU will handle more than one unit, using a daisy chain T connector,shown below.
A bit of a "Steam Punk" look from drawing the front panel with an engraver by hand... but I like it.
I may have to change the way I run the relays. The RC filter drops 9V when the relays are activated. But they only get activated in Line mode (so no phantom then) so it might be ok.
I like the connectors, molded rubbery plastic, with machined aluminum screw closures, gold contacts. They come in up to 6 conductors, and are very very flexible but 16AWG wire.
The interior of the case is pretty empty, in case anyone is interested here are some of the trace cuts in combination with a couple of straps this will run the 4 tube heaters in series on 48V.
I use 24V relays, with dropping resistors. I put an RC filter on both the 250V and the 48V on the board.
I am interested in the trace cut modification that is mentioned in the G9 thread, but I can't find any instructions on that. If anyone can point me directly at that I would appreciate it. I have not started audio testing on this yet, just checking voltages etc. I may need to change the 48V around a bit - when the relays are activated the heaters don't get enough current. But the heaters don't need to be filtered, so I think I can fix that and I think I will run some signal through it after the 4th.
I used some old Altec input transformers
I used off the shelf PSU's that I had lying around for the power. 48V and 250V.
I used Factory Automation cables rated for 600VDC. Really nice, really cheap and pre-built.
The PSU will handle more than one unit, using a daisy chain T connector,shown below.
A bit of a "Steam Punk" look from drawing the front panel with an engraver by hand... but I like it.
I may have to change the way I run the relays. The RC filter drops 9V when the relays are activated. But they only get activated in Line mode (so no phantom then) so it might be ok.
I like the connectors, molded rubbery plastic, with machined aluminum screw closures, gold contacts. They come in up to 6 conductors, and are very very flexible but 16AWG wire.
The interior of the case is pretty empty, in case anyone is interested here are some of the trace cuts in combination with a couple of straps this will run the 4 tube heaters in series on 48V.
I use 24V relays, with dropping resistors. I put an RC filter on both the 250V and the 48V on the board.
I am interested in the trace cut modification that is mentioned in the G9 thread, but I can't find any instructions on that. If anyone can point me directly at that I would appreciate it. I have not started audio testing on this yet, just checking voltages etc. I may need to change the 48V around a bit - when the relays are activated the heaters don't get enough current. But the heaters don't need to be filtered, so I think I can fix that and I think I will run some signal through it after the 4th.
I used some old Altec input transformers