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1 WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN The project described on these pages uses POTENTILLY FTL HIH VOLTES. If you are in any way unfamiliar with high voltage circuitry and the safety precautions critical to working around high voltages, PLESE O NOT RISK YOUR LIFE Y UILIN THIS PROJET. Seek help from a competent electronics technician before building any unfamiliar electronic circuits. Efforts are made to ensure the accuracy of this projects documentation, however, no guarantee is provided, of any kind. USE OF THIS PROJET IS T YOUR OWN RISK: The webmaster, project coordinator, project contributors, and web space provider expressly disclaim all liability for injury or property damage resulting from this information. ll information is provided 'S-IS' and without warranty of any kind. OPYRIHT N INTELLETUL PROPERTY NOTIE: The content of this document is protected by the copyright laws of the United Stated of merica and the international copyright laws and agreements. No part of this document may be reproduced, displayed, copied, translated, adapted, downloaded, broadcast, used, or republished in any form including, but not limited to, distribution or storage in a system for retrieval without the expressed written permission of Michael orsich, oppermps. WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN - WRNIN Sheet of

2 To (left channel) R9 Line In J F R Log, anged R5. K R.5 K Va 0 F, 5 V SL R 5 Vb 5. F R 0 K R5 0 pf V V 5 R 0 K Red White lue Output Trans. T hamp MI: TF0-ULH reen Yellow lack R 0 J5 Speaker Jacks J 9 0 pf R M, anged cw R5. K R F, 5 V R 9K 0 F, 50 V Right hannel (add to component designators for left channel) R R9 0 K R M R9 0 Hammond 5Q, or equivalent + + F+ F Slo-lo, 50 V Power Transformer T R, 5 W L R K R 0K Power S 50 V 00 F, 50 V 00 F, 50 V 00 F, 50 V R 00K F, 0 V Power In J L N IE- Power Supply 0 V, 0 Hz Edcor XPWR0, or equivalent. V. Power supply component designators: through 0. Right channel (shown) component designators begin with, odd numbers only. Left channel (not shown) designators begin with, even numbers only.. mplifier is shown wired for UL (Ultra-linear) operation., R, and grey jumpers (screen supply) are not used with UL operation. If not using UL mode, use grey value for R and leave UL tap disconnected (if present).. "cw" post is 0 ohms to center post when pot. is fully clockwise. F+ V V V V V R F, 5 V Optional circuit if using an LE pilot light. LE Schematic uthor: Michael orsich Sheet of Rev. 0005

3 Power Supply Power mp Pre-amp HV T HV { R R R R9 R R0 R R R R R R R9 R0 R R5 R R R9 R5 5 R R 9 R R R0 R R R 0 R R T Heaters { L Heater T Primary{ S PL Screen Screen Plate + Plate + T T 0 0 cw cw Tone R R N J F L V 5 V 5 R J V 5 V 5 Left Right ommon Input Jack Safety round J5 J R5 R TS hassis round R. ircuit board is to scale; remainder is not to scale.. /, R/, and grey jumpers (screen supply) are not used with UL (Ultra-linear) operation. See options' notes for R/ values when UL mode is not used.. "cw" post is 0 ohms to center post when pot. is fully clockwise.. Transformer and choke wire colors may vary from shown. 5. Light -cyan jumpers are solid; dark-cyan jumpers are stranded hookup wire.. Mounting holes are bored for # screws. Tie-wrap filter caps using holes provided. J TS TS Layout Sheet cw cw Volume R R uthor: Michael orsich of Rev. 000

4 /" mounting holes for # screws & standoffs. /" component mounting holes; sized for small Tie-Wraps. 5/" wire pass-through holes; sized for elden 00 gauge hookup wire. ore to /" for Keystone type 5 turrets; bore with # bit for Keystone type 50 turrets. 9/" ground bus mounting hole; sized for gauge bare copper wire interference fit. ore out to match mounting method.. Template is to scale. When printing locally, verify print scale percentage and adjust as needed. hange History: 000 Moved location of right ground bus hole /" right for clearance with R Updated size for # screw. ircuit oard Template uthor: Sheet of Rev. Michael orsich 0000

5 Rear Edge of hassis L Hammond 5Q T Edcor XSE5--5K T Edcor XSE5--5K V V V V T - Edcor XPWR9 0/0 V In /" holes for mounting circuit board. ircuit board mounted with # x -/ screws & standoffs. 9/" component mounting hole; sized for # screw. -/" diameter hole, sized for elton Micalex octal tube socket /" component mounting hole; sized for #0 screw. /" hole for /" I, 9/" O grommet. Front Edge of hassis. Template is to scale. When printing locally, verify print scale percentage and adjust as needed. lign left of printed template with left edge of chassis.. hassis and paper are both " wide. Part of the template will be outside of the print area. lign paper left edge with chassis left edge. Ensure printer did not clip area of template containing drill marks. hassis utout Plan, Top View uthor: Sheet 5 of Rev. Michael orsich 0000

6 Top Edge of hassis E hassis Front E TS- 9/" for # screw. H ottom Edge of hassis Top Edge of hassis hassis Rear J F (/" drill dark grey; connect holes as shown to cutout light grey) ottom Edge of hassis /" hole for mounting Switchcraft /" jack, volume, and tone controls. /" hole for mounting liffs insulated /" jack; if tight or /" bit is not available, use /". IE- connector cutout. orners are /" radius. Mounting holes are 9/" for # screw. /" hole for mounting fuse holder. E F H /" component mounting hole /" holes for safety ground connection. ttach ground wire of IE connector directly to chassis here. Secure with # x / screw, washer, lockwasher & nut. /" torque-taker holes for potentiometers. /" alignment hole for power switch.. Template is to scale. When printing locally, verify print scale percentage and adjust as needed.. hassis and paper are both " wide. Part of the template will be outside of the print area. lign paper left edge with chassis left edge. Ensure printer did not clip area of template containing drill marks. hassis utout, Left & Right uthor: Sheet of Rev. Michael orsich 000