Hi Charles, In my Elektronika 7-06K clock, transformer is quite big, primary winds are 0.35mm diameter (!!!) and it looks like about 100-200W, no idea why it's so big, probably they just used the standard one they had in stock, but I have measured power and clock takes only 18-20W, so I am sure, the use just one wind would be OK and as far as I remember, when I disassembled and investigated lots of circuits in the past ;-), there were lots of transformers with double 110V winds and they used switch on the device back to change the voltage and I am quite sure that they were not used in parallel and just one or 2 in series winds have been used. I also never seen any Soviet transformers with fuse or thermal breaker inside transformer, they always used external fuse only ;-(
Best regards, Konstantin www.kosbo.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Charles MacDonald Sent: Saturday, August 25, 2012 7:36 PM To: [email protected] Subject: Re: [neonixie-l] Re: Elektronika 7-06M On 12-08-25 08:53 AM, Konstantin wrote: > Clock transformer has 2 winds rated for 110volts connected in series, > so I believe, it's quite simple to re-solder one wire for one wind > use for 110-120Vmains, as in USA. Only catch with only using one winding is that it handles all the power. Running 110volts rather than 220, of course means that the current required doubles. If you connect both windings in parallel, each takes half the required current, and so they each carry the same load as if the two were in series on 220. I don't know if the soviet designers were into using fusible links in transformers. Many UL/CSA transformers have a "weak" link in the windings, so over-current will open the primary. To keep UL and CSA happy, that link tends to be on the inside of the winding so that a consumer would not defeat the protection. -- Charles MacDonald Stittsville Ontario [email protected] Just Beyond the Fringe http://users.trytel.com/~cmacd/tubes.html No Microsoft Products were used in sending this e-mail. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
