The circuit breaker as shown on the SAMS is starting to bug me A LOT.
It has to be an error.
With the secondary rated at 143v @ .58a, there is absolutely no way for it to be protected by a 4.5a circuit breaker, the transformer would self destruct long before the 4.5 breaker tripped.
I have checked the RCA CTC 10/11/15 schematics, which have basically the same type of power supplies, and they have 2.1a breakers.
https://www.ebay.com/itm/393284894216
which makes much more sense.
The SAMS listing of 4.5a has to be an error, IMOH.