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  1. birdtrek

    Powabyke repair.

    d8veh you are a genius. It powers up :-) Working out how to get two wheels off the floor and turn the pedal and throttle the same time proved the most challenging. If I had road tested first after fitting new batteries ....... ...... but at least now I understand how the electrics work on this...
  2. birdtrek

    Powabyke repair.

    No I hadn't read the manual - but I have now. 'quote' The ignition has two settings. The first ‘click’ gives Pure Power when pedalling to start it then you can stop pedalling. This is be controlled by the throttle. If you stop and do not pedal for 5 seconds the motor will cut out. The second...
  3. birdtrek

    Powabyke repair.

    Update: Measuring the voltage more carefully this time at the back of the throttle connector ...... it seems to be minus 4v at off and minus (-) 1v when twisted. I missed the - sign last time, sorry. At the back of the pedal assist connector, this is 5v whatever. So can I presume that both the...
  4. birdtrek

    Powabyke repair.

    Update. This controller has two inputs, throttle and pedal sensor. I have 5v between red and black on both feeds. Measuring at the joint feeding the throttle I seem to have about 4v when throttle not used dropping to 1v when twisted. I did try using the pedal assist joint with the throttle but...
  5. birdtrek

    Powabyke repair.

    Could not find any bad connections. It would be disappointing if the controller was faulty. I bought the bike as 'dead' and the charger had developed a fault and the batteries had just been left too long. Is there anyway I can check the controller and throttle sensor independently? Would it make...
  6. birdtrek

    Powabyke repair.

    Update. Made up two cables to connect to block connector and offer to battery off bike. The motor came to life immediately and yes at full speed. For anybody else trying this, I put the bike stand on blocks and weighted the rear end so the motorised front wheel could spin. I then used bungees...
  7. birdtrek

    Powabyke repair.

    Hi Alan, Yes, has block connector with two wires going to motor. As the voltage is 38v even without throttle or peddle power, am I correct in assuming that the controller sends the voltage at a very low amps and increases with throttle twist? If I put 36v direct to these two wires going to motor...
  8. birdtrek

    Powabyke repair.

    Trying to repair a dead Powabyke. 36V front wheel motor with SLA batteries. Replaced the batteries. Fitted pack and all the lights show up. It doesn't power the motor. I've disconnected the joint between the motor and controller and my voltmeter shows 38v which doesn't change whether you pedal...
  9. birdtrek

    A2B Metro status lights.

    Just an update which may be of use to other A2B users. At between 5 - 6 miles the green light stayed off. At between 15 - 16 miles the amber light stayed off. It was still powerful. This was doing some pedalling as well. All things considered - It's a very nice ebike :)
  10. birdtrek

    A2B Metro status lights.

    Thank you for the reassurance :) It shows nearly 41v at the battery terminals. This one has no internal battery only the rear mounted which suits me as I can take it off and lighten the load on the bike rack. Chris
  11. birdtrek

    A2B Metro status lights.

    Hi, Can someone tell me what the lights red/amber/green on the handlebars are supposed to indicate ? They are all alight when I start but the green goes off when I go up hill but comes back on when back downhill or at rest. Am I asking too much of the motor or is the battery coming to it's...
  12. birdtrek

    Mercedes Benz Hybrid Bike (HELP)

    I have one of these. I will have a look in morning if there is any alternative from the rear. For now: Does not the straightened key still turn the assembly? Chris
  13. birdtrek

    NiCd to NiMh problem.

    Thank you for the explanation. When I tried the new thermistor, the pack was opened and I left the thermistor sticking up in the air. It is an unheated shed, so really it's temperature would not have changed during charging, but the charger still went green quite quickly. (30 mins)...
  14. birdtrek

    NiCd to NiMh problem.

    Between the showers we did manage a 'test' run on the bike. We would conclude that a little more charge was put in but nothing like it should. My electronic knowledge is minimal. Can you send me a link to a 'normal 10k resistor' on eBay? Are you able to explain how the 'beta' values work? I...
  15. birdtrek

    NiCd to NiMh problem.

    Update on thermistor: Arrived this morning and soldered in. Unfortunately, it only charged for about 30 mins and the charge light went green. It's a 1.8 amp charger and assuming a flat battery, a charge lasting about 6 hrs would be expected on a 10 ah battery. The charger is borrowed from...
  16. birdtrek

    NiCd to NiMh problem.

    Thank you. Ordered off Farnell, so should be here tomorrow. (Though I had to make the order up to £20 before they accept electronic payment.) Next question; is the possibility of upgrading the original NiCd charger feasible?
  17. birdtrek

    NiCd to NiMh problem.

    Thank you. I've researched the charger and found: All of these models use a NTC(R=10K, B=3960) sensor. Now to try and buy one and solder in :-)
  18. birdtrek

    NiCd to NiMh problem.

    Hi, I've changed the 20 D cells in a battery pack. Took out the NiCd and switched to NiMh, soldering everything in same sequence. The original NiCd charger would not work at all on these so I have tried another 24v NiMh Charger. It will charge for about 15 mins and then thinks the battery is...
  19. birdtrek

    Hello from West Wales :)

    I was looking for advice and ideas with regard to the eBikes I already own, sorry if you misunderstood. In any case, don't think Milton Keynes is within my shopping radius.
  20. birdtrek

    Hello from West Wales :)

    I am a 'Silver Haired' Motorhome owner, hoping to enhance days out and holidays with the help of an electric bike. Your website is full of interesting information. Thankfully not everyone is on FB but some are sharing their knowledge on here. Looking for advice and good ideas. My name is Chris.