On Nov 19, 10:46*am, Bob wrote:
Hello,

Not too sharp with noise reduction techniques.

And, too much of a Sr. Citizen now to actually build chokes, etc. myself
anymore, but would like to ask the following, please.

Have a new WinRadio Excalibur receiver, and it appears that I am picking
up a lot of noise from nearby "stuff":
Possibilities, I think, would include:

Comcast Router
PC Modem
And, a whole bunch of wal-warts which I assume are switching types.

Are there inexpensive, simple, ferrite toroids that I can clip on wires
that may help ?
Any that R/S sells that are worth a try ?

For the wal-warts, should they go on the AC input, the dc output, or both ?

Should they also go on USB cables between the PC and receiver module ?
All USB cables ?

How about the Modem to Router lead, and the Router to PC lead ?

Any part of the coax lead in from the receiving (only) antenna ?
(doubt it, but thought I'd ask this one anyway)

Any thoughts would be most appreciated.

Thanks,
Bob

Hi, Bob.
I had to Goggle the receiver to see what it was all about. So, now
some questions about the noise.

You have already determined the noise is continuous and repetitive by
thinking it may be from adjacent computer equipment. Does the noise go
away when you set the radio to FM? If it does, then the noise is
coming in from the antenna. If not, the noise is being picked up by
the radio chassis. Did you bond it metal radio box to the computer
metal chassis or housing? I hope you are not using a plastic cased lap
top computer.

I see the radio uses a USB connection to the computer. Do you have any
other USB devices connected to the computer? If so, disconnect them
all with the computer off, then turn the computer on and the radio on.
Still same noise. If no, plug in other USB devices one at a time and
listen for noise. If one of them is the source, you may need to get a
separate powered USB expander and plug all the offending devices into
it.

IF not USB related, you will need to go trough the steps of
determining which accessory is causing the noise.

Are you using a standard CRT for a monitor, or a LCD monitor? The LCD
will generate noise from the scanning electronics in the display panel
and unless the back light is LEDs, the AC operated electroluminicent
panels are quite noisy. Physically move the radio as far as you can
from the monitor.

You asked for thoughts and I have one other. Except for the noise, how
do you like the radio?

Paul, KD7HB