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  1. Z2TT

    Comparing efficiency of R12 and R134a with properties ?

    Hi Guys. It's for a long time been mentioned or thrown around that R134a is Less efficient than R12, however technical bulletins from such as compressor manufacturers say otherwise that R134a is more efficient. From comparing properties, I can see that R134a appears to have a greater...
  2. Z2TT

    Strongest solder for soldering copper to copper (vibration resistance)

    Hello. I have an alternator that I need to solder copper wire to the bridge rectifiers. Now as this is being used in a vehicle, there will be vibration which may weaken the solder or cause it to fracture. I need to know which solder will be able to give the strongest hold and be resistant to...
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