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只看楼主倒序阅读 0 发表于: 2008-08-14

— 本帖被 sanyue 从动手一族和玩家 show 移动到本区(2010-01-10) —

— Schematic Circuit Diagrams —

	The following is a list of Valve equipment (and some classic transistor stuff) schematic diagrams. To increase clarity and or reduce the file sizes some have been traced, redrawn and output in Adobe Acrobat pdf format.
	Updated July 2007
[size=+2]Where possible I have redrawn the following schematics in the original style and layout so there may be a few inaccuracies, please let me know and I will correct them — Where components are concerned I have generally used common symbols for basic parts i.e. an electrolytic capacitor is drawn in the old British style and looks like where the shaded end is negative — The American symbol would be where the curved side is negative [size=+2]I have elected to use the british symbol for redrawn schematics — Resistors are drawn which is common to nearly all older schematics and looks like a difficult path for current or even a heating element - which is actually what it is! — The box symbol indicates nothing but like others I use it for the day job and schematics that I have produced to support articles on this site [size=+2]Another area to look out for is junctions, most older schematics use bridges to show wires that cross later becoming a simple cross + — Junctions are often marked with dots — As a rule, however drawn - no more than 3 wires should meet at a junction — I have elected to use bridges or simple crosses with junction dots and more than 3 wires at junctions if it reflects the original style or is obvious what is connected [size=+2]Another area to look out for is junctions — Most vintage schematics use bridges to show wires that cross later becoming a simple cross +. Junctions are often marked with dots As a rule, however drawn, no more than 3 wires should meet at a junction. I have elected to use bridges or simple crosses with junction dots and more than 3 wires at junctions.

Schematic	Source	Size
AcroSound 6L6 Rebuild	DCD customer re-build	33kB
QUAD II Power Amplifier	As supplied with the original handbook	A4 - 49kB
QUAD II Power Amplifier	Relaid for SPICE (a different perspective)	A4 - 33kB
Quad AM II Tuner (European model)	As supplied with original handbook	80k
Quad 22 Pre-amplifier Schematic	Redrawn on A4 now scaleable and searchable	A4 — 300kB
Ultra-Linear by Hafler and Keroes	Audio Engineering 1951 — Searchable and scaleable pdf — Also see Original Article	A4 — 172kB

D.T.N. Williamson High Quality Amplifier	Wireless World 1947 Original Article	57kB
D.T.N. Williamson High Quality Amplifier - new version	Wireless World 1949 Original Article	66kB
QUAD405 Evolution Updated May 2008	A Compilation of redrawn QUAD 405 circuit diagrams covering all production versions plus some DCD mods	687kB
QUAD 405 and 405-2 Service Data	Re-created in pdf format from serval sources - contains all schemtics	2 MB
QUAD 405 input stage mod.	DCD 405 Article	27kB
QUAD 606 service data ( schematic )	Redrawn QUAD schematic scaleable and searchable	A3 — 800k
QUAD FM4 s/n 11,000 onward	Pdf from scan (A3 size)	172kB
QUAD 34 Pre-amplifier S/N 6001 onwards	Redrawn from service data to support my QUAD 34 Mods	196k
QUAD34 Moving Coil Disc input modules modifications	DCD QUAD 34 Mods	24kB
QUAD 34 Moving Magnet Disc input modules modification	DCD QUAD 34 Mods
SAI guitar amp (Marshall copy)	Passive tone control modification	37kB
11Ω BBC LS3/5A Switched HF Mod	DCD Speakers	92kB
11Ω BBC LS3/5A Standard Schematic	DCD Speakers	83kB




Note: This information is offered for free and without warranty — All files carry either a watermark or a unique identifier — If you intend to use this information for commercial use certain laws may apply in some parts of the world — Otherwise share and enjoy — And please be careful not to electrocute yourself