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boatman's 1/72 HMS Tiger C20 build

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  • stillp
    SMF Supporters
    • Nov 2016
    • 8097
    • Pete
    • Rugby

    #3466
    Fitting fuses isn't going to make a difference Chris, but those plug-in fuses are an easy place to measure the current.
    Pete

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    • boatman
      SMF Supporters
      • Nov 2018
      • 14498
      • christopher
      • NORFOLK UK

      #3467
      Originally posted by stillp
      Fitting fuses isn't going to make a difference Chris, but those plug-in fuses are an easy place to measure the current.
      Pete
      WELL Pete i dont want to endanger that PDB board so its only two screws to undo each end an then test the current comin through the wire as the board will be out of the circut if you see what i mean

      Comment

      • stillp
        SMF Supporters
        • Nov 2016
        • 8097
        • Pete
        • Rugby

        #3468
        Chris, you can't endanger anything by measuring the current in the fuses, but alternatively you could just disconnect one of the 12V Input wires from the screw terminal and connect your meter between the removed wire and the terminal. The problem with that is that you'll be measuring the total current flowing into the board, which might be too much for your meter, and won't tell you which of the circuits is taking a high current.
        Here's another idea: disconnect the +ve outputs from that PDB board, set the meter to 10A, connect it between the wire you removed and the terminal you removed it from. That will tell you how much current each of those 4 circuits is taking.
        Pete

        Comment

        • boatman
          SMF Supporters
          • Nov 2018
          • 14498
          • christopher
          • NORFOLK UK

          #3469
          Pete so on the meter its the amps setting on the right hand side correct ? an what do i set the meter dial at the 10 amps ?

          Comment

          • GerryW
            • Feb 2021
            • 1757

            #3470
            Well if your 5A fuses haven't blown (they should normally blow at 10A), then it doesn't look as though there's a fault on those 4 lines.

            Comment

            • GerryW
              • Feb 2021
              • 1757

              #3471
              Looking at your meter Chris, put the red plug into the socket near the 10A, then turn from 'Off' to the 10A mark (4 o'clock)

              Comment

              • boatman
                SMF Supporters
                • Nov 2018
                • 14498
                • christopher
                • NORFOLK UK

                #3472
                Originally posted by GerryW
                Well if your 5A fuses haven't blown (they should normally blow at 10A), then it doesn't look as though there's a fault on those 4 lines.

                HI Again Gerry if you look at the wireing pics a few pages back you will see that so far im only useing two circuts on the board an maybe thats where the trouble is maybe i should open up the wires an use all four circuts on the board ?
                chris

                Comment

                • boatman
                  SMF Supporters
                  • Nov 2018
                  • 14498
                  • christopher
                  • NORFOLK UK

                  #3473
                  Originally posted by GerryW
                  Looking at your meter Chris, put the red plug into the socket near the 10A, then turn from 'Off' to the 10A mark (4 o'clock)
                  YEA Gerry got that

                  Comment

                  • GerryW
                    • Feb 2021
                    • 1757

                    #3474
                    Originally posted by boatman
                    HI Again Gerry if you look at the wireing pics a few pages back you will see that so far im only useing two circuts on the board an maybe thats where the trouble is maybe i should open up the wires an use all four circuts on the board ?
                    chris
                    I'd keep it as simple as you can, especially during fault finding, I'd suggest as Pete said, check each circuit used. Fuses are 'strange' things, I've had them quite happily run at 50+% 'overload' (so a 5A will run 7.5A - though in my case it was 15A running 25A! :surprised: ) or, blow at slightly over rating

                    Comment

                    • stillp
                      SMF Supporters
                      • Nov 2016
                      • 8097
                      • Pete
                      • Rugby

                      #3475
                      Originally posted by boatman
                      YEA Gerry got that
                      Yes, that's it Chris, thanks Gerry.
                      Fuses can have one of two kinds of 'rating' - some are marked with the current at which they are expected to blow within some time period, others are marked with the current they can carry continuously. Most need at least 10 times the marked current to blow immediately.
                      Pete

                      Comment

                      • stillp
                        SMF Supporters
                        • Nov 2016
                        • 8097
                        • Pete
                        • Rugby

                        #3476
                        Originally posted by boatman
                        HI Scottie yes she looked very nice with all 4 radars goin an all red A/C lights an the steam unit steaming away from the front funnel but pity about power shortage but may do away with the right hand cam as i only have 2 x12 unit goin all rest are 6v in an attemp to conserve power
                        Chris, I only just spotted this. Using 6V won't conserve power, in fact the opposite as it has to be converted from 12V, which might be why your 'power converter' is getting hot. What you could do is to connect two of the 6 volt fans in series (negative of one to positive of the other) and then run them from 12 V.

                        Comment

                        • boatman
                          SMF Supporters
                          • Nov 2018
                          • 14498
                          • christopher
                          • NORFOLK UK

                          #3477
                          Originally posted by stillp
                          Yes, that's it Chris, thanks Gerry.
                          Fuses can have one of two kinds of 'rating' - some are marked with the current at which they are expected to blow within some time period, others are marked with the current they can carry continuously. Most need at least 10 times the marked current to blow immediately.
                          Pete
                          Originally posted by stillp
                          Yes, that's it Chris, thanks Gerry.
                          Fuses can have one of two kinds of 'rating' - some are marked with the current at which they are expected to blow within some time period, others are marked with the current they can carry continuously. Most need at least 10 times the marked current to blow immediately.
                          Pete
                          WELL MANY THANKS YOU TWO as thats something i dint know as i thought if it says 5 amps then any more power over an it will blow but no can take half as much again :thinking: wow you guys knock spots off me on eletrics maybe i should hand the ship to you two to sort it out LOL:tongue-out3::smiling5::smiling5::smiling5: ONLY JOKEIN GUYS as i wll get to the bottom of it just gonna take a bit of time an im hopeing my new boaty m8 may know more than me as he has just jioned this forum but not had time to put anything on yet as he has had a funeral to arrange an he runs a bussiness i think
                          CHRIS

                          Comment

                          • boatman
                            SMF Supporters
                            • Nov 2018
                            • 14498
                            • christopher
                            • NORFOLK UK

                            #3478
                            Originally posted by stillp
                            Chris, I only just spotted this. Using 6V won't conserve power, in fact the opposite as it has to be converted from 12V, which might be why your 'power converter' is getting hot. What you could do is to connect two of the 6 volt fans in series (negative of one to positive of the other) and then run them from 12 V.
                            well its a good idea Pete only one problem im the type of person who likes when im fitting things like them 4x6v fans that i cant get to the wires as ive C/A them togeather on the S/S so cant get the wires apart but i'll have a look an see if it possible cheers again for the idea SO a lot to do starting tomorrow as really should have started to day but been on here all day but its been good as ive got some good info from you genorous guys on here MANY THANKS ALL
                            chris

                            Comment

                            • GerryW
                              • Feb 2021
                              • 1757

                              #3479
                              Originally posted by boatman
                              well its a good idea Pete only one problem im the type of person who likes when im fitting things like them 4x6v fans that i cant get to the wires as ive C/A them togeather on the S/S so cant get the wires apart but i'll have a look an see if it possible cheers again for the idea SO a lot to do starting tomorrow as really should have started to day but been on here all day but its been good as ive got some good info from you genorous guys on here MANY THANKS ALL
                              chris
                              Even if you were to cut the wires (one positive and one negative on each pair) then bridge across would do it

                              Comment

                              • boatman
                                SMF Supporters
                                • Nov 2018
                                • 14498
                                • christopher
                                • NORFOLK UK

                                #3480
                                Originally posted by GerryW
                                Even if you were to cut the wires (one positive and one negative on each pair) then bridge across would do it
                                I DONT think i can do it Gerry as the wires are gluded right up to the fans but will have a look at them as there may be a bit of the wires up the side of the fans that finger crossed i havnt gluded so i maybe lucky then i can try you guys idea but im thinking of removeing these two fans as i just fitted them so the steam unit would get more air but i dont think they are needed now
                                chrisClick image for larger version

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