The diodes mentioned earlier, 1N4005, have a reverse voltage rating of 600v which is more than adequate.
Best regards Bill Allison On Sunday, 4 August 2019, 06:34:43 BST, Julian Coleman <[email protected]> wrote: Hi I don't know that circuit is doing or what loads there are on it, but I'd opt for something of a considerably higher reverse rating than 15V. When a coil is switched off it will create a considerable voltage spike when the energy is removed. What that voltage is will depend on the coil and the way the energy is cut - the more abrupt (eg a switch/relay), the higher the voltage. Since diodes are available in versions with inverse ratings of 100s of volts, this is neither difficult nor expensive. Julian ColemanCity Audio Services ----- Original Message ----- From: [email protected] To:"Quantum Owners Group" <[email protected]> Cc: Sent:Sat, 3 Aug 2019 23:24:24 +0100 Subject:Re: [Quantum Owners] Nose Cone Wiring The diodes supplied were 1N4005 , 5 amp diodes . all they are doing is driving the coil of a relay when either the sidelights or the headlamp main beam flash is used so 5 amp should be more than adequate. I used a bridge rectifier on mine as it is easy to mount and comes with Lucas spade connectors , needs a bit of care to get the right diodes ~~ to sidelight/headlamp and- to relay coil . On Sat, 3 Aug 2019 23:13 Derek Clews, <[email protected]> wrote: Dear All, In the Q manual the nose cone wiring has two diodes. The values required are not mentioned. What was the Quantum spec? I appreciate it is in a 12V system so 15 or 16 volt would cover, but does anyone know the minimum wattage? Thanks Derek -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. 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