GSSL Comp power tranny question

[csonics]

I don't know if this has been addressed. But I have a power tranny that provides 15v ac and 13v ac. I know that the schematic wants 15 and 12. Does anybody know if using 13v will create problems?

 

[Rob Flinn]

13v maybe a bit low to get the regulator working properly.

 

[csonics]

[quote author="Rob Flinn"]13v maybe a bit low to get the regulator working properly.[/quote]

Actually 13v is for the subregulator voltage which is recommended to be 12v.

 

[bcarso]

If your mains power is pretty undistorted, 13VAC will have a peak value of about 18.4V, and after a loss to rectifiers' forward drop will still leave you with something to regulate down to 12V with.

 

[Rob Flinn]

Actually 13v is for the subregulator voltage which is recommended to be 12v.

When I`m looking at the diagram I see one secondary supplying both 15 & 12v pos regs & the other secondary supplying both 15 & 12v neg regs. 18.4v is not enough for a 15v reg to do its job to 15v properly.