John, I've noted your report of VFO tuning noise on 10 m, and will look into it further when I get back from vacation. Sounds like re-radiation of SPI bus tuning data, and this could be frequency specific. It might also vary with the type of antenna, ground, and other I/O devices connected to the rig. Usually atmospheric noise masks any digital switching noise, which is typically at an extremely low level.
As Graham noted, a temporary workaround might be to use the DSP noise blanker, set to something like t1-5. This will have virtually no impact on normal signals, and is applied post-crystal filter so it can't cause wideband IMD. The DSP NB is quite good at removing low- level, high rise-time signals. NB settings are stored per-band, and you can also save the on/off status on a per-band basis by setting CONFIG:NB SAVE to YES. 73, Wayne N6KR > On Jun 27, 2009, g3...@lineone.net wrote: > This noise was previously reported under the title "K3 Tuning > encoder pulses and birdie problem" > In my case it is only noticeable at the low end of 28MHz when there > is a low noise level from the antenna or with a dummy load attached. > Wayne suggested using the noise blanker on a low setting like t1-5, > also tightening screws and tmp cables may help. In my case it > seemed to get better when I installed the KRX3, but maybe cos I > tightened up the screws and cables. > HTH > Graham ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
