In a tube circuit, plate resistors and supply decoupling resistors should be 5-600mW and ideally rated for the supply voltage present – yes! resistors have a voltage rating. General Component Selection Guide Resistors are the most common component in most linear circuits. The assembler must provide wire, solder and a chassis to support the kit safely, as required or as relevant to the kit. A special mounting instruction note is included with these kits. Tube-based kits can usually be mounted two ways and the PCBs are silk-screened on both sides of the board. Tube-based kits DO NOT include the tubes.
The product description for each kit contains dimensions for the PCB, dimensions of the assembled kit, and some information about the kit’s function. For tutorials on how a given kit or circuit functions, refer to our books. Kit notes are only available with the kit. Some kits include mounting hardware if there is a single way to mount the board. Kit notes include the schematic of the kit, the board layout, installation and mounting instructions. For either of these variations, the pot and jack boards are not included.
For some kits, you can order just the PCB and notes, or also the “hard to get parts” unique to the board.
Our printed circuit boards use twice the industry standard for copper thickness to assure reliable and reworkable connections. The pots and jacks have PC-pins and we include small PCBs to mount them on and for the wiring to be easily attached to. For example, a preamplifier kit contains the circuitry that makes up the audio signal path ONLY the kit will require a power supply to support it.Īll of our kits use high-quality components, including: metal-film 1% tolerance resistors flame-proof metal-oxide and wire-wound resistors where required long-life electrolytic capacitors plastic and ceramic capacitors select semiconductors ceramic tube sockets industry-standard jacks and pots. Each kit contains the circuitry relevant to itself. London Power’s kits allow the hobbyist or amp builder to add features to an existing project or to build a new project from scratch. Cathode-Bias/Fixed-Bias Switching in Tube Power Amps.RBX Raw Bias Auxiliary Supply – When Do You Need It?.Power Scaling for Tube Amplifiers – Q&A.Independent Reviews of The Ultimate Tone Book Series.Hammond Transformers for Tube Audio Amplifiers.
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