Welcome to the new FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR, Power Genius, Tuner Genius and Antenna Genius Software?
SmartSDR v3.8.19 and the SmartSDR v3.8.19 Release Notes | SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.8.8 and the Power Genius XL Release Notes v3.8.8
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
SmartSDR v3.8.19 and the SmartSDR v3.8.19 Release Notes | SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.8.8 and the Power Genius XL Release Notes v3.8.8
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
Broadcast station on 40m spilling into 40m Ham Band
Don Weeks
Member ✭✭
On my 6600, I am hearing a SW AM Broadcast station out of South Carolina at 40 over S9 and above. When they play music and in some cases talk, the entire ham band down to 7.150 noise floor raises up and down with the music. And in many cases stations at 7.260+ are drowned out or there is additional signal coming in over or with their voice distorting it. Someone online suggested adjusting the VFO and bandpass but I don't see a way to do that or I have not dug deep enough in the manual for this?
0
Answers
-
Don;
A few things to check.
1) Is the Flex in WIDE mode, if so close the other panadapters so that there is only one open. This will enable the bandpass filters, greatly increasing the selectivity of the 6600.
2) Enable the TNF filters and set one over the offending signal. Procedure is in the manual.
3) Click on the mode (LSB) and select a narrower bandwidth for the slice, maybe 1,8.
Let us know if any of these make a difference.
John
0 -
John,
I will look at this when I get home. TNF is something I can add for sure. The LSB mode is narrow but the signal coming from the SW station is narrow. I believe it is coming in around 7.320. I will look into WIDE mode.0 -
A few things to check:
1) If the offending station is overmodulating, or has extremely sharp crossover transitions, these will mimic an impulse interfering signal. This can trigger your WNB (Wideband Noise Blanker) if the WNB setting is high, which will pump the noise floor, and often send pseudo spurs up and down the band. I have experienced this with Radio Havana. Turning WNB OFF or down, may help.
2) Be sure that you are not using preamp gain on 40 Meters. It is unnecessary, and only reduces your dynamic range, which could make you vulnerable to extremely strong signal interference.
This combined with zooming in your panadapter a bit and making sure that your radio is not in "Wide" mode can help.
1 -
Build or buy a Broadcast filter and install it in the Antenna lead, Much better to get rid of the RF at source getting into the radio then to put a band-aid or try to filter it out if it is that strong.
Unfortunately the 6600 doesn't have a receive loop to install a Low power Broadcast filter like the 6700 has so the filter you build or buy needs to switch out of line during Transmit so you'll probably have to build a Relay switch that runs off the PTT Keying output.
73's
Bret
WX7Y
here are some on Amazon https://www.amazon.com/Flamingo-AM-Broadcast-Bandstop-Applications/dp/B079CMB44V/ref=sr_1_2?keywords...
or https://www.amazon.com/Broadcast-Reject-Filter-RTL-SDR-Blog/dp/B01N9SHS7P/ref=sr_1_4?keywords=AM+broadcast+band+filter&qid=1578669759&sr=8-4
or the great looking 11th order filter https://www.amazon.com/broadcast-reject-filter-order-enclosure/dp/B074S6X9HF/ref=sr_1_6?keywords=AM+...
0 -
More sources. Neither of these requires bypassing on transmit - just put them in line with the Flex.
Buy:
https://www.kf7p.com/KF7P/Morgan_Filters.html
Build:
https://www.qsl.net/wb5wpa/Filter/AM%20Brick-Wall%20160%20Meter%20Filter.pdf
73,
Doug K4DSP
0 -
Won't help. His interfering station is a 40 meter Shortwave broadcast station, probably just above the top of the 40 meter ham band. These filters are for the 500 kHz to 1.7 MHz AM broadcast band.
2 -
And if the signal is going into the band pass, not much you can do. The 6600 has about the best filters around for signals out of the band pass.
0 -
The 6600 has better filters for out-of-bandpass signals than other antennas that's for sure, I even listen to certain radios like this, for example. https://www.radiofmdance.com0
Leave a Comment
Categories
- All Categories
- 280 Community Topics
- 2.1K New Ideas
- 523 The Flea Market
- 7.5K Software
- 6K SmartSDR for Windows
- 144 SmartSDR for Maestro and M models
- 349 SmartSDR for Mac
- 247 SmartSDR for iOS
- 228 SmartSDR CAT
- 168 DAX
- 351 SmartSDR API
- 8.7K Radios and Accessories
- 7K FLEX-6000 Signature Series
- 838 Maestro
- 43 FlexControl
- 842 FLEX Series (Legacy) Radios
- 786 Genius Products
- 413 Power Genius XL Amplifier
- 274 Tuner Genius XL
- 99 Antenna Genius
- 238 Shack Infrastructure
- 162 Networking
- 398 Remote Operation (SmartLink)
- 124 Contesting
- 618 Peripherals & Station Integration
- 122 Amateur Radio Interests
- 856 Third-Party Software