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

[Drew Papanek]

Andy Jackson wrote:

>A good source for 600 Ohm to 8 Ohm matching transformers is the LS-166/U
<loudspeaker used with various vehicle and manpack sets.

<snip>

Don't forget the common 70.7 volt line matching transformer used in PA 
systems.  Connect the secondary (typically has taps for 4,8,16 ohms) to 
match your speaker.   Connect your 600 ohm
source to the primary 10 watt tap.  That will present a 500 ohm load to your 
600 ohm source,
close enuf fo' gummint work.

Mouser sells those transformers and last I checked Radio Shack did also.

Of course, the Hammond transformer would provide better audio quality.

Drew

"Vicariously repairing and modifying the R-390x series via advice to others"

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