DIY modules/kits (all prices include VAT)
CHC-REG Hicap regulator module: £150 each
These are completed modules with heatsinks that are are a direct replacement for any Naim Hicap regulator module - they bolt into the Hicap case using the same mounting holes that the Naim modules use, so there's no extra holes to drill. Each one is supplied with mounting bolts and heatsink paste. Six wires need to be de-soldered from the existing Hicap board and re-soldered onto the new CHC board (these solder connections are in the exact same positions and layout as the Naim regulator boards, so it's easy to do), and the output voltages are pre-set to a fixed +24V for full Naim compatibility. A simple upgrade for people with basic soldering and DIY skills, yet a massive improvement in performance! Module is shown below - fully assembled and tested. Comes supplied with nice new mounting bolts and a small packet of heatsink paste for installation.
HA10 Headphone Amplifier kit: £150 each
The HA10 Headphone Amplifier is an extremely capable unit, comprised of a hybrid valve input stage with a class A solid-state output stage. It can drive any conventional headphones (not electrostatics) with ease due to the high bias current of the class A stage, with that wonderfully smooth valve signature to the sound. Bass is strong and precise, treble is beautifully smooth yet also detailed, and at the kit price it is absolutely unbeatable on value. The kit is actually a half-way house between the ready-built HA10 and the HA10SE (further-upgraded parts can be supplied with the kit on request).
This is a DIY kit, supplied as a blank PCB and a kit of components. You will need to solder this yourself, and drill appropriate holes in the case according to the instructions. The kit includes all of the parts you will need - a case (black or silver), all input/output sockets, a brand new JJ valve, even the volume knob and valve guard cage. A genuine Alps Blue Velvet volume potentiometer is also included (not shown in photo). I have a limited supply of these kits for now, but if demand is adequate then I can supply extra kits. I’ve also written a comprehensive PDF build manual for the kit, which also covers information on the casework and how to calibrate the amp (two simple multimeter measurements). I can send copies of the build manual to anyone interested in the kit, just to look at – no obligation to buy the kit. The case and volume knob are available in silver or black, please give your preference when ordering. No problem to mix and match the colours either.
I am also willing to sell the bare PCBs on their own (PDF build manual is also still included with it of course), at a cost of £25 each
CHC-RC Passive preamplifier kit (input selection & motorised volume): £75 each
The CHC-RC kit allows you to build a standalone passive preamplifier with full control of input selection or volume, either by remote control or by the controls on the front of the unit. Up to 6 inputs are supported, as well as output to drive a motorised volume pot (Alps Blue Velvet or TKD pots are both suitable high-quality options).
This is a DIY kit, supplied as a blank PCB and a kit of components. You will need to solder this yourself. A case is not supplied, but the kit is designed to perfectly fit the popular range of Hammond cases (as used by the CHC DC2) if you require a case. The kit can either be used on its own as a self-contained passive preamplifier with full remote control facilities, or it can also be used as the input selection/volume control section of an active preamplifier. It is possible to combine it with an active buffer stage or gain stage to make an active preamp - the HA10 kit above is one such suitable gain stage, with some small modifications.
The CHC-RC kit includes PCB, components (including 6 Omron silver-plated signal relays), remote control handset, front-panel pushbuttons with built-in LEDs and the IR receiver and IR lens hardware. You just need to supply a case, motorised potentiometer, input/output sockets and a suitable PSU (AC or DC supplies can be used, within a range of supply voltages).
As with the HA10 headphone amplifier project, the build manual PDF is supplied with the kit and it is also available for free if you'd like to read it before deciding to purchase a kit.
Shown below is a completed CHC-RC kit in a Hammond case (£28, JPR) with silver volume knob (£3, CPC), using an external linear 9VAC PSU (£10, Ebay). This is the same as our "special order" PP20R passive preamplifier, but now available at a much lower cost due to the DIY aspect of the project. All holes in the case are simple drill holes, there are no awkward square holes to cut etc.
Silver plated Blue IECs (see below): £24 each "A superb product. Better than Wattgate!" Stuart (UK)
Ferrite cores, for clipping onto cables of up to 11mm diameter (smaller cables will need a few turns of electrical tape to allow the ferrite to be clipped on securely): £4 each