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  1. bushtech

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

    73's de Edd This comes out of an old PC power supply 230V/ 6/4A. Right after incoming supply Writing on it says SCK 082 Man enough for the job?
  2. bushtech

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

    Thanks Audioguru, that's a thought. I'm now considering 73's de Edd's inrush current limiting thermistor
  3. bushtech

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

    I now let it run for an hour (Still 1Amp fuse) switched off and did the tongue tip test (not really). Everything cool including the 2 infamous resistors, which really surprised me. However, straight after switchoff I switched it on and off twice at about 2 sec intervals. At the second switchon...
  4. bushtech

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

    73's de Edd, haven't done enough start ups to tell. I now did a hot startup (cap still charged?) and installed a 1A fuse and switched, it survived that and I am now letting it run for a while to see what gets hot. When R1 or R2 start crisping I'll switch off. Audioguru, how long does the big...
  5. bushtech

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

    Aah, eagleeyed 73's de Edd. Not my proudest moment with my Dremel tool. Thank goodness you can't see the power switch on the photo, that's even worse:(
  6. bushtech

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

    That would be R1 and R2. On the 82Ω R2 I am already using a 5 watter
  7. bushtech

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

    Will definitely do, thanks Audioguru Hmmmm, what about those 2 resistors that have wayward tendencies ?
  8. bushtech

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

    Thanks Audioguru. I had never before noticed that the amps only loads up when a load is attached. Started working fine when I attached load. Seems I still have a lot to learn about this power supply. Load is a big 50Ω resistor as shown in post #226. Still need to find out if I'm still...
  9. bushtech

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

    I have now noticed that I don't seem to be getting any current. No matter how I turn the amp pot the meter stays on 0A. Have checked the voltages on U3 and all more or less the same as the readings I posted in post #271 apart from pin 3 which has gone from 0 to 2.5V.
  10. bushtech

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

    Thanks for the clarification steve. I probably made a mess up of transferring this lot into a box which is causing this problem
  11. bushtech

    Denon AVR-1912 E2/EA

    Have you checked the batteries on the remote. You can use your phone's camera to see if the Remote is transmitting.
  12. bushtech

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

    Will my analog MM be able to show it?
  13. bushtech

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

    Thanks Audioguru. Just thinking now, I had DMM in dc mode aand I was reading AC amps. Does it matter when you're reading Amps?
  14. bushtech

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

    Audioguru I stuck my DMM in in place of the fuse and fired the power supply up a couple of times. The highest reading I saw on the DMM was 0.54A. Is this within the realms of normality and is this enough to blow a 0.75A fuse? I think not. Pots turned right down but dummy lead attached
  15. bushtech

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

    This is the fuse: http://www.conquer.com.tw/product/item_sel_all_set2.asp?item_assortment_no=64
  16. bushtech

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

    This is what the fuse looks like: Busy talking with the supplier to find out if it is a slow blow fuse. If it is I have to find out why the fuse is blowing
  17. bushtech

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

    Previously the the lamp would just flash at switch on and slowly start lighting up if I raised the volts and amps. So are you saying a slow blow fuse of 0.75A is OK or should I use a larger slow blow fuse?
  18. bushtech

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

    Thanks Audioguru Fuse between power plug and switch in live line. I am using a double pole single throw switch so I am switching the neutral as well. Question: Now that the power supply has been weaned off the series lamp I am blowing 0.75A slow blow fuses when I switch on. Is this the correct...
  19. bushtech

    RC Car Repair.....Battlebot chasis

    I think kellys_eye is on the money there. The thickness of the dangling black wire matches the red battery lead. The 90 deg turn of the black cable end suggests it was probably pushed through the little hole in the tab and then badly soldered on the underside of the tab. But it does depend on...
  20. bushtech

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

    Progress report My build so far. Still need to pick up a 10 turn pot on Wednesday, so front panel on hold. PCB will be mounted vertically between transformer and big cap. Sure would appreciate it if somebody would tell me if I'm making some monumental stuff up somewhere:oops:
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