W3JN said
The Sherwood, however, if you have it connected to a 455 KHz output, is probably BEFORE the DSP. Although I haven't looked at a skizmatic for this radio,
Actually John it is after the DSP. There are two 455 IF outputs on BNC's on the rear apron. One is before the DSP and one after. I am connected to the one .. after .. obviously because I want to use the DSP to control the bandwidth to tackle QRM etc.
I think like you that a 5 khz DSP notch should have been considered instead of the filter they designed in. In a receiver billed as a lab grade instrument, there should have been no corner unturned to be sure that it was done right!
What is sad is that they appear to be so busy with the Orion and maybe even the successor to the RX-340 that they did not address the problem when it was brought to their attention, other than to offer a mod to disable the filter. It's sort of, NRSC .. what's that?
I would really like to be founded well in American products instead of the Kenmores and such but TenTec got my attention with the Jupiter and the RX-340 and then I sit here looking at bugs and getting pissed because I paid their price!
I suggested one time that they open source the firmware and boy did that get shot down quickly! Can you imagine, some sharp firmware cookie grabbing the source and making those radios sing? I'd buy six of each just because but that's not about to happen.
--Larry