Sorry to resurrect a 4 year zombie, but I recently finished my clubman, my first "from scratch" build.
Heavily inspired by xtian's layout, and all the good info in this thread. Big thanks to all of you!
I made a few changes, moved some things around. Both the transformers needed a cutout so that needed addressing.
Anywho, I remade my layout in DIYLC and created a BoM, and edited the schematic to match the build so far.
turbofeedus's Matchless Clubman EF86 Bill of Materials
turbofeedus's Matchless Clubman EF86 Layout - DIYLC File
Notes:
• I had the chassis custom made by Synaptic Amplification on Reverb. They were very helpful with design, were able to do custom dimensions in a heavier gauge alu than others, and did the difficult transformer cutouts. Thanks Steven.
• The transformers are from Transformer Design and Supply in CA. They are the same transformers Matchless currently uses. Bill was very helpful, you can reach them by phone at (951) 654-9199. Price was $400 for the full set (power, output, and choke). Note: The PT from TDS is 290V-0V-290V, not 345V-0V-345V as shown on schematic.
• I've added fuses on both sides of the HT winding as per valvewizard's recommendation.
• I've added diode protection to the rectifier as per basically everyone's recommendation.
Questions and Improvements:
• I've increased V1 plate resistor to 100K from the 18K in the schematic, with the hopes of driving the EF86 into saturation more readily. I'm still confused as to why Matchless chose 18K in the first place.
• The treble control works "backwards" as shown, and I see this is a problem xtian sorted here. I will probably do the same.
• Because the voltages from this PT are lower, the EL34 are sitting at ~50% plate dissipation with the 470 ohm cathode resistors I thought I needed. Will be trying lower values soon, 240R should put me right under 100% dissipation.
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