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[AMPS] SB200 with Kenwood TS450

To: <amps@contesting.com>
Subject: [AMPS] SB200 with Kenwood TS450
From: measures@vc.net (Rich Measures)
Date: Sat, 27 Mar 1999 08:24:00 -0800


>
>Hello:
>
>Do I need to use an interface of some type when using the Kenwood TS450
>with the SB200, and if so can it be purchased?
>
?  With this combo, the radio starts making RF before the amp. can 
switch.  This results in hotswitching.  A better (and >15db quieter) 
solution is to convert the SB-200 relay supply from half-wave neg. output 
to fwb pos. output, remove the stock way-too-slow relay, rewire the grid 
ckt to the std. config. (like the SB-220), and install high-speed 
switching.  See Fig. 7B on my Web site or 1-1994 QST.  Total cost is c. 
$60.  After conversion to H-S sw., the 200 can be keyed with the 
"RL"/+12v on Tx/ output from the 450's Acc. Jack.  
-  later, Brad



Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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