[Amps] MW Oven Transformer question

[TexasRF at aol.com]

Thanks Will and John; I now have an understanding of the heating issues  with 
the MOT. It appears that these transformers are really a poor choice for  
continuous operation such as a filament power source. Two transformers with the  
primary and secondary windings series connected will work and for  testing the 
traveling wave tubes is the quick method to be used.
 
Many thanks for your help in my continuing education!
 
73,
Gerald K5GW
 
 
 
In a message dated 3/21/2006 11:10:15 A.M. Central Standard Time,  
craxd1 at verizon.net writes:

If you  want to add turns to the primary (if there's enough room, and should 
be with  the secondary removed), you can do a simple test to see how many 
turns to add.  First, use the formulas I published last week about figuring the 
core size and  number of turns to find the correct number of turns for the core 
size you  have. Next, connect the primary to 120 Vac and wind a 10 turn coil 
secondary.  Take that secondary voltage and divide it by the 10 turns. That 
will be the  turns per volt. Last, wind the extra turns you've found you need by 
the  formulas and the known turns per volt. One good thing on this transformer 
in  question, the primary is on the inside. If on the outside, you'd be 
screwed on  removing the secondary.

Best,

Will

*********** REPLY  SEPARATOR  ***********

On 3/21/06 at 11:42 AM John Popelish  wrote:

>TexasRF at aol.com wrote:
>
>> Not what I hoped  to hear but I appreciate the good info! 
>
>If you have a supply  of this kind of landfill, you might put two 
>similar units side by  side, wire the primaries in series (effectively 
>halving the volts per  turn, so eliminating the saturation problems). 
>Then you can knock the  shunts out and wind a similar secondary on each 
>(doubling the number  of turns to compensate for the half primary 
>voltage) and wire those  two secondaries in parallel.  This gives you a 
>reasonably  efficient transformer (that won't overheat without a fan) 
>with about a  kVA rating.
>_______________________________________________
>Amps  mailing  list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps



_______________________________________________
Amps  mailing  list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps