Dear group,
I am assembling an Ear + headphone amplifier/line pre amplifier and would like to ask a few questions. I have no formal training ( precious little knowledge of any kind in electronics ) therefore expect naïve questions.
My first non-practice connection. Iron in hand, all tinned: Iron, transformer pins, SF 4700 silicon diodes. Heat sink haemostat standing guard; do not touch the copper tip with the solder wire. Ah, nice, shiny bulbs of solder on connections, diode wands all erect... but are they cold, white, good.. I don’t know? If I test with my little Mastercraft multimetre? Transformer pin to closest whisker: good! Moves from infinity to 0. Pin to distal whisker: 6.3 ohms at the x1k setting; damn forgot to check the diode for comparison, before soldering. Well all four diodes are so. That is reassuring. Interesting: when the multimetre probes are switched so that the – is close to the pin and the + rests on the farthest diode whisker, the metre registers the prone 8. Is this normal? Is this what is meant by an asymmetrical diode. Should I blunder on.
Is using a mutimetre to measure resistance as I have described above as a way of verifying the integrity of a solder joint ( if that joint also looks solid, that is, it is not in danger of breaking off because it is hanging by a hair ). Is this a sound approach?
Thank you,
Mauveport
