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  #1  
Old 05-29-2011, 06:17 AM
zekk zekk is offline
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UTC CG-300 Pinouts??

Hi Folks,

Can anyone please help me to figure out the variable primary connections?

Pri: 0v, 105v, 115v, 220v, & 230v.

Sec: 625v - 515v - 0v -515v -625v.

Data sheets does not show pin connection!

v

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Old 05-29-2011, 07:01 AM
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PakProtector PakProtector is offline
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hey-Hey!!!,
I suspect the secondary is in two separate pieces, and likely the primary as well. One bit of primary will be 0-105-115 and the other 0-115 so the entire combination of input voltages can be configured( ex. the 220 is created with the 0-115 connected in series with 0-105 of the first bit I think ). Now the secondary is likely created by putting the two bits in series. Now if that is the case you can make a 615-110-0-110-615 secondary by reversing the polarity. Perhaps useful for creating a negative rail bor either bias or a cathode follower...

See what is connected to what with an Ohm meter, the primaries will be low compared to the secondary and there *MAY* be a separate tap for grounding the core.
cheers,
Douglas
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Old 05-29-2011, 07:44 PM
zekk zekk is offline
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Thanks, Douglas!

Using a variac to check out the pins, it's confirmed that the sec. taps are 7 to 11 at 625-515-0-515-625 respectively.

Applying 105v to pin #1/#2, #4/#5, pins #7-9-11 reads 625-0-625v.
The same 105v to pin #1/#3, #4/#6, pins #7-9-11 reads 515-0-515v.

So, I've two pairs of primarys.

If I series the primary for a 230v supply, will I be getting a doubled voltage across #7 and #11, eg: 1250-0-1250v?

Regards, Zekk.
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Old 05-29-2011, 08:11 PM
zekk zekk is offline
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... just answered my own question!

By connecting pin#3 and #4 together and applying 230vac to pins #1 and #6, I got 625-515-0-515-625v on pin #7 to #11 respectively.

Thanks all for watching.

Zekk
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Old 05-30-2011, 06:31 AM
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PakProtector PakProtector is offline
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Quote:
Originally Posted by zekk View Post
Thanks, Douglas!


If I series the primary for a 230v supply, will I be getting a doubled voltage across #7 and #11, eg: 1250-0-1250v?

Regards, Zekk.
But you can arrange a 220 connection and apply 120V to it and deliver a little more than half that voltage. It will cut the volts/turn and make it radiate less which may be useful in a lower voltage design a typical linestage would use.
cheers,
Douglas
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Old 05-30-2011, 07:30 AM
zekk zekk is offline
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Thanks again, Douglas!

I'm building a SEUL TT22 with EL802 as driver.

So, needs high voltage !

Will post pics and schematic when ready.

Regards, Zekk.
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