Hi guys - ok, the build is underway.
You are looking top down from the back of the proposed layout. Chassis is simple folded 1.6mm aluminium. Ends will be in solid rimu (podocarp timber). Width is to end up with a finished 43cm wide, 34cm deep (it goes on a 35cm deep shelf). The red outline is the perimeter of the top.
The chassis is 6.5cm high.
12SL7s on the left - they will have RCA inputs directly behind them in line with the speaker posts you can see. Sockets will mount directly to the chassis top plate - they drop in and are locked by a circlip.
The 1625s are on a 8cm centre grid - close, but not tight. Sockets will mount directly to the chassis top plate from underneath, on small stand-offs.
The iron is (screen top to bottom, rhs), 5.5h choke, 16.5h choke, PTX. OPTs sit behind the 1625s. All direct top mounting again except the PTX obviously drops through. An IEC power input socket with filter will sit behind the PTX
Underneath will be 2 x ccs circuits for the SL7's in ltp configuration; 4 x mosfet sf circuits between the ltp's and the 1625's.
Note all terminations are on the top of the chassis rather than the back - no depth to work with!
Cooling is via a mesh screen at hte back and radial drillings in the top plate around the tubes.
Straight power amp - no volume controls required.
Rip in guys...
You are looking top down from the back of the proposed layout. Chassis is simple folded 1.6mm aluminium. Ends will be in solid rimu (podocarp timber). Width is to end up with a finished 43cm wide, 34cm deep (it goes on a 35cm deep shelf). The red outline is the perimeter of the top.
The chassis is 6.5cm high.
12SL7s on the left - they will have RCA inputs directly behind them in line with the speaker posts you can see. Sockets will mount directly to the chassis top plate - they drop in and are locked by a circlip.
The 1625s are on a 8cm centre grid - close, but not tight. Sockets will mount directly to the chassis top plate from underneath, on small stand-offs.
The iron is (screen top to bottom, rhs), 5.5h choke, 16.5h choke, PTX. OPTs sit behind the 1625s. All direct top mounting again except the PTX obviously drops through. An IEC power input socket with filter will sit behind the PTX
Underneath will be 2 x ccs circuits for the SL7's in ltp configuration; 4 x mosfet sf circuits between the ltp's and the 1625's.
Note all terminations are on the top of the chassis rather than the back - no depth to work with!
Cooling is via a mesh screen at hte back and radial drillings in the top plate around the tubes.
Straight power amp - no volume controls required.
Rip in guys...