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Output Transformer Resitance
#20

(04-07-2012, 10:56 AM)exray Wrote:  
(04-06-2012, 07:39 PM)marv Wrote:  OK, I am getting ready to attempt a rewind of this thing and have one more question. I counted the turns of the bad OT and measured 3984 turns on the primary and 39 on the secondary. I think the turns ratio agrees with what Ron and Morzh stated above. By my measurent the primary used #37 wire and the secondary #20. I have some new 37 on the way but do not have any 20.

What will happen if I use #22 for the secondary maintaining the correct number of turns? Will the impeadance still be correct but result in a lower watt rating?

Hi,
I'm a bit late to this thread. You might be able to sneak by with #22 but it would probably be worth the effort to get some 20 so as to not have to worry about it later. I guess re-doing 39 turns wouldn't be a terrible job if you had to rewind it.

On that high 6K5 voltage. If its still high after you get the xfmr redone then you should probably question the type of meter you're using. That's a very high impedance point and the meter they used originally to create the voltage chart probably loaded down the circuit somewhat. A DMM will read high at points like this.

So long as you have enough "real estate", secondary guage not that important.

Make sure you have corrected voltage divider circuits before firing up again. I like to insert an old fashioned analog DC ammeter in circuit while bringing set up slowly on variac to see if there is a lingering problem


Messages In This Thread
Output Transformer Resitance - by marv - 03-26-2012, 07:45 PM
RE: Output Transformer Resitance - by tab10672 - 03-26-2012, 08:07 PM
RE: Output Transformer Resitance - by marv - 03-26-2012, 08:36 PM
RE: Output Transformer Resitance - by tab10672 - 03-26-2012, 09:24 PM
RE: Output Transformer Resitance - by codefox1 - 03-27-2012, 01:26 AM
RE: Output Transformer Resitance - by marv - 03-27-2012, 11:44 AM
RE: Output Transformer Resitance - by tab10672 - 03-27-2012, 03:24 PM
RE: Output Transformer Resitance - by Ron Ramirez - 03-27-2012, 06:19 PM
RE: Output Transformer Resitance - by morzh - 03-28-2012, 09:21 PM
RE: Output Transformer Resitance - by marv - 03-27-2012, 07:10 PM
RE: Output Transformer Resitance - by Ron Ramirez - 03-27-2012, 07:44 PM
RE: Output Transformer Resitance - by codefox1 - 03-27-2012, 08:50 PM
RE: Output Transformer Resitance - by marv - 03-28-2012, 09:33 PM
RE: Output Transformer Resitance - by marv - 04-06-2012, 07:39 PM
RE: Output Transformer Resitance - by exray - 04-07-2012, 10:56 AM
RE: Output Transformer Resitance - by codefox1 - 04-19-2012, 08:23 PM
RE: Output Transformer Resitance-UPDATE - by marv - 04-19-2012, 02:35 PM
RE: Output Transformer Resitance - by morzh - 04-19-2012, 03:13 PM
RE: Output Transformer Resitance - by marv - 04-19-2012, 07:13 PM
RE: Output Transformer Resitance - by Arran - 04-19-2012, 07:54 PM
RE: Output Transformer Resitance - by marv - 04-19-2012, 08:35 PM



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