center tapped power transformer help needed

John Robertson jrr at
Wed May 4 02:06:36 CDT 2016

On 05/03/2016 8:51 PM, Jim Brain wrote:
> On 5/3/2016 10:48 PM, Chuck Guzis wrote:
>> On 05/03/2016 08:08 PM, Jim Brain wrote:
>> 60 Hz?  Maybe you could give the guys at Prem Magnetics a call. They're
>> always sending emails offering to do custom work.
> Yep, 50/60Hz.  I will check them out.
> Also, Ian, thanks for the link.  I'll check them out as well.  I will 
> admit, though, those Xformers looks huge in the brochure, and I always 
> thought those little 120->6.3V 6VA transformers I used to find in 
> cannibalized tape recorders and such were so much smaller.
> Jim
Nothing stopping you from using two smaller transformers - 120 primary 
to some secondary voltage, say 24VAC, then a second transformer with a 
240V CT primary that also has a 24VAC secondary. Assuming you get the VA 
figured out correctly these should work and be much smaller than a 
single 240CT to 120VAC transformer.

Hammond Manufacturing makes a wide range of superior quality 
transformers that is widely used by the tube and regular electronics folk.

I think you will find this series helpful, note the VA rating and get 
yourself one of the 187C20 and a 186C20 - or for a bit extra power and 
to allow for losses, get the 187D20 and 186D20 - wire the 24VAC 
secondaries together (ignoring the centre tap on the secondaries of 
course). Farily compact.

Hammond also will wind you a single or a thousand transformers...I like 
looking at their complete line, including a replacement transformer for 
the early 1920s RCA Radiola III battery radio.

Amazing range!

John :-#)#

John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
"Old pinballers never die, they just flip out"

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