Hi Don, We have a long weekend here, so I've been able to get back to this. I reflowed RF board and KSB2 board, with no improvement.
I then took out the KSB2, inserting the previously removed links and the capacitor (effectively returning radio to pre-KSB2 state). The noise problem on X1 goes away. Your thoughts on what to look at next would be appreciated. Mike VK1OO On 03-Jun-12 6:59 AM, Don Wilhelm wrote: > Mike, > > If you do not find the solution re-flowing the solder on the RF board > filter area, the problem source may be on the KSB2 board in the > switching diodes and/or resistors at the filter end of that board, so > for completeness, reflow those connections as well. > > 73, > Don W3FPR > > On 6/2/2012 4:24 PM, VK1OO wrote: >> Don, >> >> The effect happens when the antenna is disconnected as well as when >> connected. >> And in SBB and CW >> >> SSB Filter Widths >> X1 = OP1 >> X2 = 2.4 >> X3 = 2.1 >> X4 = 1.8 >> >> CW Filter Widths >> X1 = OP1 >> X2 = 0.7 >> X3 = 0.4 >> X4 = 0.1 >> >> I assume something is going wrong in the 4.915MHz Variable Bandwidth >> Crystal Filter. >> >> > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
