AMP – Tube Power Amp Kits (PA + PSU)

CAD $700.00CAD $1,056.00

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Description

SAVE $50 COMPARED TO BUYING LONDON POWER’S INDIVIDUAL PA66 POWER AMP AND PSU POWER SUPPLY KITS!

AMP complete tube power amp kits combine London Power’s super-flexible PA66 push-pull tube power amp kits with our matching super quiet PSU power supplies. Audio power outputs of 10W, 25W and 50W are available. Kits are available requiring complete assembly or partial assembly; the latter where the components that mount on the PCBs are installed but the transformer fly-leads are not attached. Both internal and external tube access is accommodated in the variations below – please specify the orientation required when ordering. Meter jacks and on-board bias pots are standard for safe and easy bias adjustment and monitoring.

Custom wide-band toroidal output transformers (OTs) provide outstanding audio performance good enough for hifi, and also assures that when Power Scaling is added that the amp sounds exactly the same when quiet or loud. The PA66 audio boards accommodate wiring the output tubes for tetrode/pentode, ultralinear or triode modes, to have these modes be switchable, and to have fixed-bias or cathode-bias on a per-tube or global basis. Any standard pin-out octal-based power tube can be used singly, in pairs or mixed: 6CA7, 6L6, 6V6, 5881, 6550, EL-34, KT-66, KT-77, KT-88 or their variants. The builder is encouraged to experiment freely with tube types. The power amp front-end is optimised for 12AT7 but any 12A_7 can be used.

Similarly, custom toroidal power transformers provide world-wide mains compatibility along with very low EMI (electromagnetic interference). London Power‘s active hum reduction assures that high voltage plate supply is extremely quiet, along with regulated auxiliary voltages for switching circuits, very well-filtered raw bias supply, and DC-stand-off heaters.

Combine an AMP with one or more of London Power‘s Tube Preamps, BFX Best All-tube Effects Loop and our REV Reverb for a fully featured amp. Add SV1 Super-versatile Power Scaling kit for loudness control from “unusably loud down to unusably quiet”. Add our ERK Electronic Relay Kit or one of the Q-series switching kits for ergonomic channel switching, as required.

High-reliability components are used throughout both kits: very long life filter capacitors; high-quality film capacitors; low-noise metal-film resistors; metal-oxide and wire-wound power resistors. London Power’s Galactic Ground method is used to assure that ground hum is not an issue.

All kits include the electronic components that mount on the PCBs, the PCBs, volume control, input and output 1/4″ jacks, bias pots and meter jacks, custom London Power toroidal output and power transformer, extensive kit notes. Assembly is required for the DIY versions, and all versions require wiring of the OT PT and mains, input and output connections. No tubes are included as the builder is encouraged to experiment with different types.

AMP-10 – 10W tube power amp with power supply, kit notes, all components except tubes, can support up to 11 additional 12A_7 tubes, kit requires assembly

AMP-10-EXT – 10W tube power amp with power supply, kit notes, all components except tubes, can support up to 11 additional 12A_7 tubes, assembled PCB for external tube access, transformer fly leads not attached, mains wiring and input / output connections not connected

AMP-10-INT – 10W tube power amp with power supply, kit notes, all components except tubes, can support up to 11 additional 12A_7 tubes, assembled PCB for internal tube access, transformer fly leads not attached, mains wiring and input / output connections not connected

AMP-25 – 25W tube power amp with power supply, kit notes, all components except tubes, can support up to 21 additional 12A_7 tubes, kit requires assembly

AMP-25-EXT – 25W tube power amp with power supply, kit notes, all components except tubes, can support up to 21 additional 12A_7 tubes, assembled PCB for external tube access, transformer fly leads not attached, mains wiring and input / output connections not connected

AMP-25-INT – 25W tube power amp with power supply, kit notes, all components except tubes, can support up to 21 additional 12A_7 tubes, assembled PCB for internal tube access, transformer fly leads not attached, mains wiring and input / output connections not connected

AMP-50 – 50W tube power amp with power supply, kit notes, all components except tubes, can support up to 55 additional 12A_7 tubes, kit requires assembly

AMP-510-EXT – 50W tube power amp with power supply, kit notes, all components except tubes, can support up to 55 additional 12A_7 tubes, assembled PCB for external tube access, transformer fly leads not attached, mains wiring and input / output connections not connected

AMP-50-INT – 50W tube power amp with power supply, kit notes, all components except tubes, can support up to 55 additional 12A_7 tubes, assembled PCB for internal tube access, transformer fly leads not attached, mains wiring and input / output connections not connected