[JRC] NRD545 OWNERS

[Steve J. Walker]

In parts:=20

> I have't heard too many odd effects. One that I have heard=20
> several times is that the radio seems to get "locked" into=20
> some sort of state when you tune past a strong station, it is=20
> hard to describe, but the audio is then distorted. Changing=20
> modes (from AM to USB and back for example) will fix it. The=20
> joys of DSP I guess.=20

Yes the DSP can do odd things, I use the AGC in manual a lot - that
really helps, turn the volume up and use the RF Gain to control the
signal. But then that's a chore if you are band scanning.

Could be the AGC hanging on a little longer than needed - might be worth
trying without it. And then doing a side by side test when you next can
repeat the issue.

> Well... I do both UTE monitoring and SWListening. My older=20
> receiver is an R71A, which of course has an excellent front=20
> end, although extremely poor audio. Has anyone come up with a=20
> scheme for installing both filters, perhaps some sort of=20
> small PCB, with the ability to switch in either filter? I'm=20
> not sure if diode switching would be acceptable in this case?

Yes the R71A is nice but has heinous AM audio! As for the 545's filters
they are extremely small, and all this is in a SMD area on the board,
not much fun to work with at all. And adding wires and some switching
logic no doubt will introduce issues of its own ... But you never know -
they said a 455Khz IF out was hard work but it was done after a while.

Its hard to say, I would if the radio works leave it as is, but if you
want the extra performance then yes get the filter done, you only have
to send the PCB board to Sherwood and not the whole radio which saves on
packing etc.

Steve=20



_______________________________________________
This email has been scanned for all known
viruses by our Virus Protection System in
association with NET2580. For more
information please visit http://www.bucks.net
_______________________________________________