Hi,At 64 with eye sight fading and shaky hands, I have had a go at my first pre-amp + phono stage since the late 80's. What a ball ache. Tried hot air gun and soldering Iron, but I am getting there, need tweezers and an eye class just to see the component. Went with SMD to keep size down as I only have free version of Eagle, hence modula design with many connecting cables...Just volume board to finish when parts arrive from Mouser.. Shocked at how much a few SMD resistors cost (thin film Vishy or Panasonic)..Hope images come out OK..
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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Nice. The breakdown into small modules is actually a help - easier to get working piece
by piece, and you don't ruin the whole thing if you botch one pcb.
For SMT work a hot-air gun station is a real boon, much less chance of damage when
fixing/replacing. Ditto an oven for building the pcb.
by piece, and you don't ruin the whole thing if you botch one pcb.
For SMT work a hot-air gun station is a real boon, much less chance of damage when
fixing/replacing. Ditto an oven for building the pcb.
Thin film is best for signal path as metal oxide (thick film) are measurably less linear and have more excess noise. Larger SMT thin-film resistors are best, some people just chose MELF metal film for this reason despite the cost.
Cheers for advice, I used 1206 size thin film Panasonic, Vishay, and Yageo, 1% and some .1% for the RIAA part, but is was down to what ever Mouser had in stock at the time, prob would have used all Yageo 1% if in stock.. Looking forward to doing my next board as practice seems to make a difference. Sound wise so far its great.....🙂