Silent Knight 5104B Transformer Output Voltage

Hi guys. What’s the output voltage of a Silent Knight 5104B Transformer? My panel didn’t come with one so i’m looking into powering it with a different source. Thanks!

Most panels, I think are powered with 52-58V AC which converts later to the standard 24-28V

According to the manual the 5104B is a 12 volt system. The transformer spec is 16.5 VAC on the secondary.

There is a transformer available on Ebay for $16.99 or make offer.
https://www.ebay.com/p/?iid=282439846895&lpid=82&&&ul_noapp=true&chn=ps

They are also available from this supply house for $20.30.
http://www.vantech-inc.com/p-6049-silent-knight-115035-slkt-replacmnt-transformer-for-5104.aspx?gclid=CMT14Ou959MCFR62wAodS-AEWQ