[R-390] New favorite listening speaker

[Bob Young]

I have a mid 60's 15" Utah coaxial speaker waiting for my R390A to come back 
from Chuck Rippel. I'm going to make a box for it, haven't yet decided on 
the design, sealed or ported. Probably ported as they're more efficient, 
although I may try the diode out on the back through an old tube hifi amp I 
have and see how that sounds.
Bob Young
Millbury, Ma


----- Original Message ----- 
From: "Tim Shoppa" <shoppa_r390a at trailing-edge.com>
To: <r-390 at mailman.qth.net>
Sent: Tuesday, June 06, 2006 5:37 PM
Subject: [R-390] New favorite listening speaker


> After some serious long-term listening to my 390A's, I've decided on
> the ultimate listening speaker for SWLing:
>
>   Electro-Voice EV4's.
>
> These are mid-60's (? Lasnerian) vintage Hi-Fi speakers with 8 ohm
> inputs and a midrange horn + tweeter and woofer with a crossover.
> Most of the action when listening to SW is of course the midrange
> horn with a little bit out the woofer.
>
> Coupled to my 390A with a 600-to-8 ohm transformer, they are sensitive
> enough that with the local gain cranked to 5 or 6 I get a real good
> mellow sound out of them that covers most of the basement.
>
> By comparison my metal bookshelf speakers (old Minimus 8's) no longer
> sound very good at all. The EV4's are not as sensitive as the Minimus 8's
> but the 390A's output stage can do a pretty good job of driving them.
>
> I could see going back to the Minimus 8's for voice communication maybe
> where maybe some tinniness helps. The EV4's are really mellow and
> filling by comparison, with very little directionality.
>
> I also tried a supposedly high-end PC-clone speaker system (two little
> satellites plus a woofer) on the insistence of a local ham and it
> sounded like total and complete crap to me. Of course I was biased
> going into that test too :-).
>
> My new favorite antenna is a two-turn electrostatically shielded (e.g.
> in copper pipe with an insulating joint) 2.5ftx2.5ft loop in the
> attic, hooked up to my 390A via Twinax. Far and away this is the best way
> to suppress local QRM/RFI, even if it is not as sensitive as a longwire.
>
> Tim.
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