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  1. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Some readings so far: Out from bridge rectifier: 40V Pin 6 readings on TLE2141's: U1: 11.3V U2: 7.8V U3: 5.1V BD139: b: 7.5V c: 40V e: 12.3V All readings taken switch on, read, switch off (scared of smoke escaping from U3)
  2. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Houston, we have ignition! I have a 60W globe in series. On switchon the globe lights up and then dies. The onboard led comes on and stays on. Voltage on outputs 10.6V (no adjustment of pots done) 1A fuse in incoming not blowing. No smoke escaping but a frantic feel around for hot components...
  3. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    lol. This is getting rather busy
  4. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Good news is that I am getting 27.5V DC out of bridge rectifier
  5. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    With the replacement of the 4 onboard rectifier diodes with a bridge rectifier off board on heatsink I am battling to find the correct 2 connection points for the 2 + - leads from the bridge rectifier. Please can you help Thanks
  6. bushtech

    Can anyone ID this transformer?

    That transformer is a work of art
  7. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Thanks Audioguru
  8. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    When I get to switch on some time can I do the light globe in series setup. Or is there some progressive start up that I can do?
  9. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Progress: I first want to check if it works. Will build it into it's box later
  10. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Time to start assembly and checking what I've missed Audioguru: Still working my way through Wakefield
  11. bushtech

    Success at last

    Yes, but the underside has got a metal pad for heatsinking
  12. bushtech

    Success at last

    gunnadoo, I feel for you, been in that boat too many times myself. My current head do inner is isolating a BD139 from a heatsink.
  13. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    lol. I am planning on doing a boxing a la car radiator. If it doesn't work I'll have to get a bigger one. Roughly how big should it be? Thanks for your guidance. I am a babe in the woods here.
  14. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Yes, would have liked a beefier one.
  15. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Update: Progress on heatsink with 2 x 2N3055(insulated), BD139, LM7812, bridge rectifier and thermocouple for fan. Crowded?? Nah!:eek: Bridge rectifier is 6A 50V, bit on the low side, but all that I could get now.
  16. bushtech

    Carpenters mistake

    Well, I suppose the proof of the pudding happens when you switch it on with the blob in place
  17. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Understood Thanks audioguru
  18. bushtech

    Coffee machine power issue

    Is the relay working?
  19. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Oooh! Thanks for that. Easy to fix. Does that not apply to Rv3?
  20. bushtech

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Install of RV2:
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