Selling my amp project, due to moving on to different projects.
Would like to see first if there is some interest in the 'finished' amp, before splitting it up into parts.
The design is a 46 drives 300b setup, input is now directly to grid of 46 tube, so needs a preamp with some voltage gain. I used them in the past with Lundahl 7903 1:8 step-up transformers on the inputs and this is ideal, but requires a low output impedance of the previous stage.
Powersupply is a common tv damper diode bridge rectified LCLC-supply(Monolith) for both channels, with an additional local LC (Lundahl) decoupling for every stage. PSU is connected with an umbilical to the amp stages.
Powersupply has different primary voltage taps (220-230-240) for finetuning, and many different secondary voltage taps to get voltages from 150 to 600 in 50v steps, so it is basically a universal psu for many types of amp projects.
The amp chassis are still leftover from when they were monoblocks, so they have some open holes in them. The cases could easily be shortened, but I haven't found the time to do it.
Components are:
2x Monolith Magnetics SX-9 OPT, Nano-X core, 3.3K
2x Monolith Magnetics ITX-9 Interstage Transformers, Nano-X core, 30ma gap
2x Elrog 300B tubes
2x 46 tubes (have some extra, including a pair of globe 46)
15x asc X386 capacitors
2x LL1685 choke / 100ma/ 17H
2x LL1667 choke / 30ma / 120H
4x Tentlabs DC tube filament supplies
All dale 25W resistors
4x KLEInnovations RCA socket perfect harmony
4x KLEInnovations Classic Harmony binding posts
4x Jakeband teflon tube sockets, UX4 and UX5
1x Monolith Magnetics Power transformer: 220-230-240 Primary / Secondary 1 0-50-200, 250ma / Secondary 2 0-300-400,250ma / Secondary 3 0-6.3V, 5A
1x Monolith Magnetics Filament power transformer: 230-240 Primary/ Secondary 2x 0-3,6 3A / 2x 0-6,3 2.4A
2x Monolith Magnetics Chokes: 10H 225ma
1x Lessloss AC filter
Silver in waxed cotton wiring for signal chassis
Copper wiring in psu
SOLD
Would like to see first if there is some interest in the 'finished' amp, before splitting it up into parts.
The design is a 46 drives 300b setup, input is now directly to grid of 46 tube, so needs a preamp with some voltage gain. I used them in the past with Lundahl 7903 1:8 step-up transformers on the inputs and this is ideal, but requires a low output impedance of the previous stage.
Powersupply is a common tv damper diode bridge rectified LCLC-supply(Monolith) for both channels, with an additional local LC (Lundahl) decoupling for every stage. PSU is connected with an umbilical to the amp stages.
Powersupply has different primary voltage taps (220-230-240) for finetuning, and many different secondary voltage taps to get voltages from 150 to 600 in 50v steps, so it is basically a universal psu for many types of amp projects.
The amp chassis are still leftover from when they were monoblocks, so they have some open holes in them. The cases could easily be shortened, but I haven't found the time to do it.
Components are:
2x Monolith Magnetics SX-9 OPT, Nano-X core, 3.3K
2x Monolith Magnetics ITX-9 Interstage Transformers, Nano-X core, 30ma gap
2x Elrog 300B tubes
2x 46 tubes (have some extra, including a pair of globe 46)
15x asc X386 capacitors
2x LL1685 choke / 100ma/ 17H
2x LL1667 choke / 30ma / 120H
4x Tentlabs DC tube filament supplies
All dale 25W resistors
4x KLEInnovations RCA socket perfect harmony
4x KLEInnovations Classic Harmony binding posts
4x Jakeband teflon tube sockets, UX4 and UX5
1x Monolith Magnetics Power transformer: 220-230-240 Primary / Secondary 1 0-50-200, 250ma / Secondary 2 0-300-400,250ma / Secondary 3 0-6.3V, 5A
1x Monolith Magnetics Filament power transformer: 230-240 Primary/ Secondary 2x 0-3,6 3A / 2x 0-6,3 2.4A
2x Monolith Magnetics Chokes: 10H 225ma
1x Lessloss AC filter
Silver in waxed cotton wiring for signal chassis
Copper wiring in psu
SOLD
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