Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?


SmartSDR v4.0.1 and the SmartSDR v4.0.1 Release Notes

SmartSDR v3.10.15 and the SmartSDR v3.10.15 Release Notes

The latest 4O3A Genius Product Software and Firmware
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.

Solution to 6700 Overload

George Haslam
George Haslam Member ✭
edited June 2023 in Peripherals & Station Integration
I resently installed a homebrew Halfwave Endfed Antenna cut for 80M. In contrast to my Cushcraft R8 antenna, the endfed caused the 6700 to overload due to the very strong local AM signals, one of which exceeded +8dBm at the receiver input. The overload prevented using the endfed for receive on the lower HF bands. The solution was to insert a highpass filter in the 6700 receiver LOOP A. The filter with a cuttoff frequency of 2.6 MHz provides >40dB suppression of the AM signals. It is from RTL-SDR.com, available from amazon at a cost of $17. My measurements of S21 and S11 confirmed the specs of the filter.

Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.

Comment As ...

Categories