[Elecraft] Improving the KSB2

[Unifiedtx@aol.com]

I have not heard anyone lately talking about John Grebenkemper's KSB2 
performance enhancements.  John Grebenkemper, KI6WX, came up with some 
excellent mods to the KSB2.  I have incorporated all of his mods in my K2 and 
they really work great.  I changed out the capacitors on the KSB2 board and 
replaced them with the ones for a 2.2 Khz bandpass and have received 
excellent audio reports.  This mod has not deteriorated the unwanted sideband 
nor has it affected carrier suppression.  The KSB2 Increased Gain 
Modification is also a great mod which increases audio gain by adding a 
2N2222  transistor.  Anyone interested should look at his 12 pages of mods 
entitled Improving the Performance of the KSB2.  Because the KSB2 board is so 
small and compact it would be advisable to have a good solder sucker to 
remove components so the board won't be damaged.  His mods can be found by 
going to the Elecraft home page and click on Builders Resources.  On the 
builders resources page go down the page and click on Mods: official (and 
Un-official).   This will take you to An Excellent Index of Customer Mods by 
Sverre, LA3ZA.  Under Unofficial Guide to Elecraft K2 Modifications, click on 
#3. General Modifications applicable to any K2.  Go down the left column and 
click on Increased RFgain and Optimal Reduced Intermodulation.  this will 
bring up John's 12 pages (edited by Tom, N0SS) on Adobe Acrobat Reader. 
Roy Morris W4WFB  KAT100-1 K2100 #2225   


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