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    Toshiba TV 46HL900A2 service manual or equivalent?

    Mate at work 's TV failed. Those thinking about it asked whether anyone can locate a service manual or schematics. "46" is the size, so HL900 A2? Anything close? Competent people looking at it. Any pointers appreciated.
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    Identify capacitor value - short part code

    Image, hopefully attached, shows an ex-capacitor. Can you confirm the specs? . ADSL modem, on during a thunder storm (rare here). Input capacitor, at least, no longer intact. . Assembled, just over 1cm lead to lead. . Part shows F683J t 630MPP1 Part numbering found online for MPP capacitors...
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    For Sale: FCH131 DTL anyone have an interest?

    For sale? Well, might be difficult to put a value on, if anyone did have an interest in DTL. Dual 4-input NAND. I guess with nand you can logically build just about anything. Original packaging, seems like just short of 200 of them, at first look. Anyway, I have some, not doing anything with...
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    Fuses - breaking capacity, rupture capacity - fuse resistance

    Was asked one today that I could not answer. Appreciate any knowledge from any one who knows, has monitoed current when a fuse breaks, or opinion. . Calculations for the current that a fuse must successfully break. My friend argues that including the fuse normal resistance in the calculation as...
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    Crystal sets - How do they work? :) (with real diodes)

    Looking at requirements for energy harvesting recently, I realised that I had not appreciated fully the magic in the traditional crystal set. Perhaps someone can clarify or confirm or deny for me. . In the simplest explanation, a perfect diode, with zero forward voltage, detects, rectifies the...
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    Capacitor discharge pulse circuit topology, series capacitor?

    Just interested whether anyone knows a compelling reason for the series topology for capacitor discharge pulse circuits as illustrated below. I've just grabbed two circuits from a google search that look vaguely representative. I offer no endorsement of the circuits. The two main topologies I...
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