[Heath] SB 200 Parasitic chokes

[Chris Kepus]

A solution I found, but have not yet implemented, took some effort to find
as there multiple ways to skin this cat.  You may wish to consider it, also.
Carl, NM1H, has developed a SB-200 parasitic choke replacement alternative
that works effectively.  Ken, W7EKB, built and installed Carl's design.
According to Ken, the new suppressors do the job very well keeping his
SB-200 cranking out the power with no parasitic problems.  

 

Since I haven't yet asked either for their permission to share their
recipes, you may wish to contact Ken  about his pictures.

 

Good luck,

Chris

W7JPG

 

 

From: heath-bounces at puck.nether.net [mailto:heath-bounces at puck.nether.net]
On Behalf Of John King
Sent: Wednesday, January 09, 2013 6:44 PM
To: Heath at puck.nether.net
Subject: [Heath] SB 200 Parasitic chokes

 

Has anyone changed the parasitic chokes on their SB 200s. I need to change
mine because the leads to the chokes are breaking off at the resistors. Has
anyone tried chokes made width ferrite beads on wire leads as parasitic
chokes? If so how many beads and what mix and size? The 47 ohm 2 watt carbon
composition resistors are not available locally and neither is the tinned
wire to wind around them. The area around the tube plates doesn't leave much
wiggle or working room. What has been your experience with the SB 200?
Thanks and 73, John, K5PGW  

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