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RX-888 Gain Question

Posted: Wed Oct 14, 2020 4:09 pm
by mstangelo
I just received my RX-888. Since I like to listen to the bands by "tuning around" I will enjoy exploring a wide swath of spectrum.

I connected it to my wife's I7 laptop since my I5 has difficulty about 4MHz of bandwidth.

I connected my 160Meter Inverted-L and monitored form the LF band to 20 meters. It is overloading I assume form the AM broadcast band signals. I inserted a AM broadcast band filter and the display is more representative of the actual signals.

Is there a way of internally controlling the gain short of adding and external filter or attenuator?

I have included screenshots without and with the filter.

Mike N2MS

Re: RX-888 Gain Question

Posted: Wed Oct 14, 2020 7:03 pm
by G4ZFQ
"I connected my 160Meter Inverted-L "
Which may not be the best antenna to cover a wide range.
I think the only way is with a wideband antenna and filters. To use the whole 30MHz a preamp targeted at the higher frequencies may be used as well to even out the response.
Alan

Re: RX-888 Gain Question

Posted: Fri Oct 23, 2020 5:44 pm
by fei666888
If the ATT has been adjusted to -20db, then there is no way to adjust it down. Only an external attenuator can be added. I have never seen such a strong signal, and I have never encountered such a situation with my 20-meter long wire antenna.

Re: RX-888 Gain Question

Posted: Fri Oct 23, 2020 7:20 pm
by mstangelo
Thanks, I had missed the Radio attenuator options under the Receive Panel.

Mike N2MS

Re: RX-888 Gain Question

Posted: Fri Oct 30, 2020 2:20 pm
by fei666888
mstangelo wrote: Fri Oct 23, 2020 7:20 pm Thanks, I had missed the Radio attenuator options under the Receive Panel.

Mike N2MS


In my actual use, -20dB attenuation is enough. Normally there will not be such a strong signal.