[R-390] Never heard the real R-390

[Andy Jackson]

>
> Chuck, just in case you don't know, the speaker output is 600 ohms
> impedance. You can use a cheap radio shack 12 volt filament transformer
> (smallest one) to match the common 8 ohm speaker. Even then, stock audio
> isn't impressive.
> 73...Steve..KJ8L
>

A good source for 600 Ohm to 8 Ohm matching transformers is the LS-166/U
loudspeaker used with various vehicle and manpack sets.
The transformer is rated at 2 Watts and has a stated frequency range of 250
c/s to 5000 c/s.
Either use as-is or connect to a better 'speaker for improved "Fi".
They are not too hard to find even in the UK or Europe so I imagine even
easier in the US.

Andy G8JAC