Search results

Search Forums New Posts
  1. bushtech

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

    Here's a photo of the heatsink with the 2 3055's and the BD139 Don't know if I have any undersized cables anywhere
  2. bushtech

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

    Was busy typing this when you posted. Still a bit puzzled by the one 3055 running much hotter than the other (Have measured the voltages at both resistors after the 3055's and they are the same.) The second 3055 is warming up slightly. Am I right in saying that the matching of those 2 resistors...
  3. bushtech

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

    St Edd. Q2 is a puny little BD139. I have not felt it get anywhere near as hot as one of me 3055's. Point taken. I was shooting a bit wide with 9V Thanks
  4. bushtech

    Step down transformer reference list?

    Yep, your brow gets all sweaty when you realise that your power utility doesn't guarantee to give you the exact voltage.
  5. bushtech

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

    Thanks Audioguru
  6. bushtech

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

    @Audioguru: Well, the power supply is starting to work after a fashion, obeys Ohm's law. If I push out 20V into a 20Ω resistance I get 1Amp current. However only 1 2N3055 is getting warm. Should they both be getting about equally warm?
  7. bushtech

    ffc (CX4) cable repair for Denon AVR-1912 E2/EA

    Yep, but that's a 30m roll:eek:! Somehow you must be able to find a smaller length
  8. bushtech

    ffc (CX4) cable repair for Denon AVR-1912 E2/EA

    Here's some 40 x 1mm pitch: https://eu.mouser.com/ProductDetail/3M-Electronic-Solutions-Division/HF625-40-30?qs=sGAEpiMZZMsJiFh04Lj2rhio079ovElj0XD6nQLjX4k=
  9. bushtech

    ffc (CX4) cable repair for Denon AVR-1912 E2/EA

    https://eu.mouser.com/Wire-Cable/Flat-Cables/_/N-5ggm?P=1yzu8m5
  10. bushtech

    ffc (CX4) cable repair for Denon AVR-1912 E2/EA

    or something like this: https://www.mantech.co.za/ProductInfo.aspx?Item=14M8100-W Could be made to work
  11. bushtech

    ffc (CX4) cable repair for Denon AVR-1912 E2/EA

    I have never tried to make up a ribbon cable but I see you can buy 40 way ribbon and connectors. If you cant find the correct pitch making a breakout patch could be a labour intensive option
  12. bushtech

    Step down transformer reference list?

    Mantech in South Africa? https://www.mantech.co.za/Stock.aspx?Query=transformer+and
  13. bushtech

    ffc (CX4) cable repair for Denon AVR-1912 E2/EA

    Unfortunately don't know, but holding thumbs for you
  14. bushtech

    Digital piano won't power ON

    Can see the pictures fine. Nice clear photos, what are you using to take them? Apologies for slightly OT.
  15. bushtech

    Astronomy idea(s)

    Special place you have, as you say not easy to come by, anywhere
  16. bushtech

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

    Getting back into my power supply. Heh. How's this for a monster dummy load?
  17. bushtech

    Astronomy idea(s)

    That certainly would be something! But just taking a step back: West Coast Scotland. Hmmmmm. Brrrr. How about taking an IP enabled security camera with appropriate lens and mounting that to the back of the smart telescope. If you can then get the telescope's controller to operate from a...
  18. bushtech

    Astronomy idea(s)

    Now just thinking aloud: Those fancy motorised telescopes that can track a celestial object, mount that fixed (unswivelling) to the chair and divert the drive mechanism signals from the telescope to the motor that drives the chair:confused:
  19. bushtech

    Astronomy idea(s)

    An old school barbers chair could provide a good base to work from. Motorising the swivel should'nt be too difficult
  20. bushtech

    Garmin GPS120

    Thanks for that kellys_eye
Top