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mignal

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  1. I haven't had much time to evaluate my attempt (recently built). I don't have a minidisc or any decent interface to try it so I just plugged it into the Mic. input of my laptop and recorded a few seconds of Nylon guitar playing. Despite a lot of hiss I like the signature of these modules, a little on the bright side but that's fine with me. Let's just say that my previous Samson USB mic. is going to the bin - otherwise known as Ebay. I'll try the source follower mod sometime soon but I really do need to get myself a decent recorder or interface.
  2. For those who are new to soldering and a little concerned about over-heating the module. Over the years I have built many Hi-Fi amplifiers, from Vacuum tube to solid state efforts. Quite often I would use flux (plumbers flux) to good effect, it really does minimise the amount of time the soldering iron needs to be in contact with solder points. For those who are experienced it offers little advantage save for pre-tinning wires. Let us take the example of soldering the leads to the 2 points on the module. Assuming that we have our screened cable stripped with the copper cores twisted, coat the bare copper ends in the plumbers flux. You need a very fine smear all around, nothing more. Apply solder to the tip of the soldering iron, in other words take a 'bite' of solder - it should float on the tip of the soldering iron. Too much of a 'bite' and it will run off and gravity takes over. Now take your cable lead and apply the tip of your soldering iron to the twisted copper bare end. You should find that the solder very quickly coats the whole of those twisted ends- you have 'tinned' the lead. Once cool take your tinned lead and once again give it a very fine coat of the plumbers flux. I mean a VERY FINE COAT, wipe off the excess if necessary. Using an old matchstick pick up a very slight dab of the flux and apply it to the centre of the solder point on the module. Again it's just a very, very slight smear and ONLY on the centre of those solder points - too much and there is a danger of the flux running and causing a short between the 2 points. Now place your tinned lead in the centre of the solder point of the module. Apply the tip of the soldering iron and remove it as soon as the solder melts. As soon as I remove the soldering iron I blow on the module to cool it. It is ALWAYS advisable to do practice runs using spare wire and on solder points where the results don't matter. Save the actual mic. modules for when you are confident of your abilities. Whilst plumbers flux is given as being corrosive, in over 25 years of using it for electronic applications (namely tinning wires) I have not found it to be a problem when used as per my directions. I see no advantage to using it when soldering components to Printed Circuit Boards.
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