Enlighten a semi-novice

[Rory McDonald]

I have built a number of devices from kits, and repairs etc and done my
share of soldering, but I always have used rosin core solder- can someone
enlighten me as to why I would want to use a separate flux and then have to
wash the board etc?
I assume it is because it looks better in the long run and maybe gives a
better connection, but it seems a lot of hassle. anyone?
-Thanks
Rory

> -----Original Message-----
> From:	keithw at cix.compulink.co.uk [SMTP:keithw at cix.compulink.co.uk]
> Sent:	Monday, June 28, 1999 3:56 PM
> To:	synth-diy at mailhost.bpa.nl
> Cc:	keithw at cix.compulink.co.uk
> Subject:	Latest on MS20 Filter
> 
> Well all is working well now although I spent a frantic couple of hours 
> wondering why one of the filters suddenly stopped responding. It appears
> that I 
> got some flux residue inside the freq cutoff pot while washing the flux
> off the 
> board! DOH!
> 
> I have replaced the 47K resistors attached to the emitter of the 3906 with
> a 22k -
> 
> on Toms advice and have had to increase the 47K resistors associated with
> all CV -
> 
> inputs (including the cutoff freq pot) with 470K resistors to give me a
> workable -
> 
> frequency range on the filters. Maybe this is to do with the fact I am
> running 
> off +/-12V?
> 
> There is only one problem..
> 
> The CV inputs have an inverted response with regards to my Analogue
> Systems 
> modules. ie I have to invert the envelopes and if I put in a slope LFO I
> get a 
> sawtooth response!
> 
> Oh well, I can live with that, unless someone knows a quick cure?
> 
> After all that I have a couple of great sounding LP/HP filters to play
> with.
> Just need to do the front panel graphics now, I will put details of the
> filter 
> project on my website as soon as I get the chance, along with some pics.
> Many thanks too all who kindly offered advise, a great mailing list with a
> lot 
> of great people on it!
> 
> 
> ...NEXT!
> 
> Keith Winstanley
> http://dspace.dial.pipex.com/town/street/sl67/