Caledonian Audio 6BM8/ECL82 SE Bedienungsanleitung

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Version!1.0!

Caledonian!Audio!

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Version!

Date!

Changes!

0.1!

1st!of!May!2018!

Initial!creation!

1.0!

1st!of!Nov!2018!

Reviewed!and!accepted!

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Caledonian!Audio!

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The! work! that! will! be! conducted! here! deals! with! high-level!voltages.! It! should!

only!be!conducted!by!:,*&9L9#M!personals.!

Please!be!aware!that!N*O*N9?=<"!can!hold!charges!for!a!long!period!of!time!and!

they!should!be!properly!M9"NP*<Q#M!prior!to!touching!any!conductive!parts.!

The! 6.3V! or! 12V! terminals! are!rated! in! relation! to! another! voltage! reference!

level,! but! in! reality,! the! potential! difference! between! the! 12V! (as! an! example)!

and! ground! earth! might! be! anywhere! up! to! 400V.! So,! please! treat! any! 6.3V! or!

12V!terminals!with!#R?<#$#!care.!

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Introduction!..........................................................................................................................................!6!

Assembly!Instructions!.................................................................................................................!7!

PCBs!Preparation!................................................................................................................................!8!

Heater!Filament!PCB!....................................................................................................................!8!

Main!Power!Supply!PCB!...........................................................................................................!10!

Amplifier!PCBs!..............................................................................................................................!17!

Mounting!Components!...................................................................................................................!19!

Wiring!....................................................................................................................................................!22!

Power!Cables!.................................................................................................................................!24!

B+!Power!Cables!......................................................................................................................!27!

Heater!Filament!Power!Cables!..........................................................................................!29!

Audio!cables!wiring!....................................................................................................................!31!

RCA!to!Potentiometer!...........................................................................................................!31!

Potentiometer!to!Amplifier!PCB!.......................................................................................!33!

Amplifier!Boards!Wiring!......................................................................................................!35!

Speaker!Output!Wiring!.........................................................................................................!37!

Assembly!Completion!.....................................................................................................................!39!

Powering!Up!For!The!First!Time!...............................................................................................!40!

Questions!/!Support!........................................................................................................................!42!

Appendix!..............................................................................................................................................!43!

I.! Amplifier!PCB!Components!.............................................................................................!43!

II.! Main!Power!Supply!PCB!Components!.......................................................................!43!

III.! Heater!Filament!PCB!.......................................................................................................!43!

IV.! Schematics!............................................................................................................................!44!

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Figure!1!–!Filament!supply!board!with!the!four!diodes!....................................................!8!

Figure!2!–!Filament!supply!board!now!populated!with!the!smoothing!capacitors!9!

Figure!3!–!Main!power!supply!PCB!with!C4!capacitor!and!the!bleeder!resistor,!R5

!........................................................................................................................................................!10!

Figure!4!–!Main!power!supply!PCB!with!two!diodes!........................................................!11!

Figure!5!–!Main!power!supply!PCB!with!all!diodes!installed!........................................!12!

Figure!6!–!Main!power!supply!PCB!with!all!radial!capacitors!......................................!13!

Figure!7!–!Main!power!supply!PCB!with!all!dropper!resistors!installed!..................!14!

Figure!8!-!Main!power!supply!PCB!fully!populated!...........................................................!15!

Figure!9!-!Main!power!supply!PCB!fully!populated!-!another!angle!...........................!16!

Figure!10!-!Amp!PCB!Side!B!fully!populated!.........................................................................!17!

Figure!11!-!Amp!PCB!Side!A!fully!populated!.........................................................................!18!

Figure!12!-!Placement!of!parts!on!the!mounting!plate!-!top!views!.............................!19!

Figure!13!-!the!complete!system!................................................................................................!20!

Figure!14!-!wiring!diagram!...........................................................................................................!23!

Figure!15!-!Ground!earth!from!IEC!socket!wired!to!the!chassis!and!secured!by!

shakeproof!washer!and!insert!lock!nut!.........................................................................!24!

Figure!16!-!Live!(brown)!and!neutral!(blue)!cables!connecting!the!main!power!

from!the!IEC!socket!to!the!power!switch!.....................................................................!25!

Figure!17!-!Live!(brown)!and!neutral!(blue)!cables!from!the!power!switch!

supplying!main!power!to!the!power!transformer!(0V,!240V)!............................!26!

Caledonian!Audio!

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Figure!18!-!Two!cables!(brown)!connecting!power!transformer!secondary!

terminals!(250V!-!0)!to!the!main!power!supply!PCB!(AC!IN).!!The!

green/yellow!cable!is!the!ground!level!cable!connecting!the!0V!to!the!star!

ground.!Note!the!twisted!red!cables!carrying!B+!voltages!from!the!B+!

terminal!on!the!PCB!to!the!two!amplifier!boards.!....................................................!27!

Figure!19!-!Completed!main!power!supply!board!wiring!...............................................!28!

Figure!20!-!Twisted!red!cables!carrying!B+!voltage!into!the!two!amplifier!boards

!........................................................................................................................................................!28!

Figure!21!-!Two!cables!(red!and!black)!connecting!power!transformer!secondary!

terminals!(6.3V,!0V)!to!the!filament!power!supply!PCB!(AC!+/-!IN)!................!29!

Figure!22!-!Green!cable!connecting!the!0V!terminal!on!the!filament!power!supply!

PCB!and!the!star!ground!point.!The!black!sleeve!contains!four!wires!carrying!

the!6.3VDC!line!(two!positives!and!two!negatives)!from!the!filament!power!

supply!to!the!H1!and!H2!terminals!on!both!amplifier!boards.!The!polarity!on!

the!H1!and!H2!do!not!matter!at!all,!as!long!as!one!receives!a!positive!voltage!

and!the!other!receives!negative!voltage.!......................................................................!30!

Figure!23!-!Completed!wiring!for!filament!supply!PCB!...................................................!30!

Figure!24!-!RCA!to!potentiometer!connections!...................................................................!31!

Figure!25!-!Single!core!insulated!copper!wire!used!for!ground!connections!.........!32!

Figure!26!-!Potentiometer!wiring!..............................................................................................!33!

Figure!27!-!Potentiometer!wiring!-!another!angle!.............................................................!33!

Figure!28!-!Audio!input!cables!going!into!the!amplifier!board!.....................................!34!

Figure!29!-!Amplifier!Board!Wiring!..........................................................................................!36!

Figure!30!-!Amplifier!PCB!revisit!...............................................................................................!37!

Figure!31!-!connecting!the!output!transformer!to!speaker!terminals!......................!38!

Figure!32!-!Complete!wiring!and!components!assembly!................................................!39!

Figure!33!-!Schematics!...................................................................................................................!44!

! !

Introduction*

Congratulations! and! thank! you!for! purchasing! on! this!kit.! This! guide! enables!

readers!to!build!and!assemble!the!6BM8/ECL82!SE!Classique!DIY!amp!kit.!The!

6BM8/ECL82!SE!is!a!pure!Class!A!Single!Ended!valve!amplifier!that!uses!a!two-

stage!amplification!single!valve!per!channel!topology.!

Its!features!include:!

•2.5W!-!Pure!Class!A!per!channel!output!

•Single!ended!topology!

•Fast! Silicon! Carbide! Schottky! Diode! and! audio! grade! Electrolytic!

Capacitor!for!power!supply!producing!well!filtered!DC!power!

•DC!heater!filament!supply!

•Quality!electronic!components!

If!you!have!any!questions!please!get!in!touch!with!us!at:!

[email protected].!!

We! also! value! any! feedbacks! that! you! might! have! after! going! through! this!

document.!

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•Heater!filament!PCB!Version!A!

•Main!power!supply!PCB!Version!A!

•Amp!PCB!6BM8!PCB!Version!B!

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1. Only! parts! and! devices,! which! are! part! of! this!kit,!are! used.! Caledonian!

Audio!will!not!support!usage!of!any!other!parts!or!components!other!than!

supplied!and!mentioned!by!us!in!this!document!

2. The!supplied!mounting!board!is!used!

3. Reader!is!capable!of!performing!wiring!/!soldering!and!understands!risks!

of!fatal!level!of!voltages!!

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•Screwdrivers!(multiple!sizes)!

•Long!nose!pliers!

•Soldering!iron!(with!solders!etc.)!

•Wire!cutters!

•Wire!strippers!

•Cables!/!wires!for!hookups!and!power!lines!

Caledonian!Audio!

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Assembly*Instructions*

The!general!assembly!plan!is!as!follows:!!

1. Prepare!all!PCBs!

2. Mount!all!transformers!onto!mounting!board!

3. Mount!all!connectors!(power!and!audio)!

4. Mount!potentiometer!

5. Install!power!cables!

6. Install!audio!/!hookup!cables!

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PCBs*Preparation*

Heater*Filament*PCB*

Place! and! solder! the!four!diodes!(D5,! D6,! D7! and! D8);! note! the! polarity! of! the!

diodes!(Figure!1!–!Filament!supply!board!with!the!four!diodes).!Use!the!marking!on!

the!PCB!as!a!guide.!!

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Caledonian!Audio!

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Place!and!solder!the!2!smoothing!capacitors!(Figure!2!–!Filament!supply!board!now!

populated! with! the! smoothing! capacitors).! Please! note! the! polarity! of! the! two!

capacitors.!The!PCB!is!now!complete.!

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10!

Main*Power*Supply*PCB*

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Begin! by! placing! and! soldering! capacitor! C4! and! resistor!R5! (Figure! 3! –! Main!

power!supply!PCB!with!C4!capacitor!and!the!bleeder!resistor,!R5).!

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! !

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