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  1. Wayne Phillips

    Migwelder wire feed control

    I was asked by the local welder to look at his migwelder as the wire feed motor and the control board was acting up. 1) when trigger was pressed in, it's wire feed circuit board could be heard working. 2) you had to adjust the control all the way round before the wire would feed out. So, off...
  2. Wayne Phillips

    Xlr/ rca/ jack lead tester

    New project under way... a handy lead tester for the ever growing test gear.... Those heaped leads in a bag that need checked followed by or shit there's a broken or now it works now it does not! Once it's finished there will be a photo of the working unit...mmm schematic mmm Well I'll think...
  3. Wayne Phillips

    Line amplifiers..

    This 120w line amplifier had a distorted output.. So off with the top and take a look time... Now, for those of us who repair audio system will know line voltages amps are different from the bog standard amplifier has they are transformer coupled with 80v 100v and common to 4 ohm and 8 ohm...
  4. Wayne Phillips

    Amplifier project

    Many many years..this amplifier project was under way.. as I needed a power amp. I wanted 300w per channel with plenty of saftey circuits..from inrush protection to dc fail safe etc etc.. even added bridge mode! So rooting round the pile of odds and ends was a 1000va transformer that would do...
  5. Wayne Phillips

    Juke box repair..

    I was called out to check this huge juke box after a engineer sparked the main power supply board in front of the owner and left it humming and not much else! He left red faced and a juke box sitting there for 3 months. Mmm so let's get stuck in and power it up and all that could be heard was...
  6. Wayne Phillips

    Kam amp repair

    Kam mixer type amplifier repair... Blown output stage on right channel due to shorted bass speaker. This amplifier was in a bit of a mess with protection relay holding off the left side channel, the owner over powered a 150w speaker at this years new years party and the smell off the bass...
  7. Wayne Phillips

    Prosound 1600 amplifier repair

    This branded amplifier from a well known electronics store came to me for repair. The fault trying to power up said the owner? Well on opening it for a quick look I noticed the inrush circuit was missing a inrush ntc to slow the mass inrush voltage. What they seem to of done here was to add...
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