[R-390] KIWA MAP unit on an R390A (similar to a Sherwood SE-3?)

[Les Locklear]

Steve and Group,

I have used both, they are different in several different ways.......both 
use the 455 KHz if out, the Kiwa uses syncrophase detection, which is 
beneficial in weak signal detection and has two bandwidths typically 6.6 and 
3.0 KHz (depending on the cascaded filters used for that particular unit). 
The Sherwood is a true synchronous detector re-inserting a carrier and 
locking on to it and is better on fading (both rapidly and deep fades) than 
the Kiwa unit. I have used the Kiwa connected to the if output and then 
connected the Sherwood to the 455 KHz output of the Kiwa Map unit which is 
post filtering. That makes for great audio albeit at a greater cost and is 
somewhat redundant.

As mentioned I have used that particular set-up with R-390's R-390A's, and 
R-725, multiple SP-600's and other receivers. I now only use the Sherwood 
SE-3 as the Kiwa was almost meaningless with my Icom IC-746 and JRC NRD-515 
that has 6 filters and the Sherwood audio buffer board. I presently use the 
Optimus (Radio Shack) Pro X7 metal cabinet speaker which gives great highs 
and decent bass response.

Les Locklear



-----Original Message----- 
From: Steve Toth
Sent: Monday, October 08, 2012 12:45 PM
To: r-390 at mailman.qth.net
Subject: [R-390] KIWA MAP unit on an R390A (similar to a Sherwood SE-3?)

I've been following the Sherwood SE-3 thread with interest.  I picked up a 
KIWA MAP (Multi-band Amp pickup) unit, version 1.0 in a R390A purchase a few 
years ago - it was an accessory that was thrown in.  I have yet to hook it 
up and use it.   I believe it was a predecessor to the SE-3 and basically 
does the same functions.  I also believe the Seattle based company that 
manufactured it is now out of business.

Same questions:  Has anybody had any experience with one of these attached 
to an R390A?  What was the opinion?  Thanks!








-- Steve
"If you can't fix it with a hammer and duct tape,  you've got an electrical 
problem"
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