@David L
@Chadsturgill
Thank you both. You got me curious and sure enough the one in the attic is 10VA. Since my NSC DB2 shows 8-24 VAC, am I correct any of the 16V 30VA would be a good fit? I want to get one with the threaded fitting on the back to go into my existing box. Like this one https://www.amazon.com/dp/B07GND8RMQ/ref=psdc_6291372011_t1_B001POBN92
That will be the one...
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