RX-888 Gain Question

✔ Now supported, kit available by the end of September 2020.
mstangelo
Posts: 14
Joined: Sun Aug 09, 2020 11:24 am

RX-888 Gain Question

#1

Unread post 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
Attachments
Screenshot -   RX-888 16MHz.png
Screenshot- 16Mhz BCB filter.png

G4ZFQ
Posts: 58
Joined: Wed Aug 19, 2020 10:26 am
Location: Cowes Isle of Wight

Re: RX-888 Gain Question

#2

Unread post 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

fei666888
Posts: 18
Joined: Sun Oct 04, 2020 8:54 am

Re: RX-888 Gain Question

#3

Unread post 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.

mstangelo
Posts: 14
Joined: Sun Aug 09, 2020 11:24 am

Re: RX-888 Gain Question

#4

Unread post by mstangelo »

Thanks, I had missed the Radio attenuator options under the Receive Panel.

Mike N2MS

fei666888
Posts: 18
Joined: Sun Oct 04, 2020 8:54 am

Re: RX-888 Gain Question

#5

Unread post 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.

Post Reply