The BC-224 dynamotors are much less common. I’m guessing, just a guess, that the manufacturing radio BC-348 : BC-224 was something like
10:1. But i expect a correction, better numbers on this from someone.
I do have a BC-224 dynamotor. Honestly, i have been undecided about it for maybe three ( 3 ) years now. I have a pretty nice BC-224-C but i am
not really a dynamotor person. Many years ago, i had an ARR-15 and it was lots of fun to use, but the dynamotor definitely did set the noise floor.
So i am undecided about whether to keep it, against keeping it to upvalue the BC-224, which may be one of the last to eventually go, or selling
it separately on Ebay. So they’re out there, somewhere, but you just have to wait unless one surfaces. Now, if you have a dynamotor for a BC-224-A,
you have a trade, definitely !
I think i must have bought the ARR-15 from Columbia. I think they were $125, which of course, was much bigger money then. This has always been
one of my most fave radio receivers. They’re also a lot easier to work on than say, an SRR-13 or ARR-41. Odd, i still remember listening to a BBC
game show from Kuching, Malaysia, i think in the 60 meters band. Dinosaur memories.
I think there’s a couple ARR-15 on Ebay right now. One has the ‘conversion’ done where the left hand side has a column of toggle switches. Best
of luck selling it.
-Hue Miller