Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
The latest SmartSDR Software:
SmartSDR v4.1.5 | SmartSDR v4.1.5 Release Notes
SmartSDR v3.10.15 | SmartSDR v3.10.15 Release Notes

The latest 4O3A Genius Product Software:
The latest 4O3A Genius Product Software and Firmware
How to Receive Technical Support::
If you are needing assistance with FlexRadio products, 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.

Q5 transverter interaction

F4BPO
F4BPO Member ✭✭
in Peripherals & Station Integration

Hi all,

Just received the 2m 75w version and 50w uhf from Corey. Plugged everything and using an amplifier antenna 9 El vhf and 16 El uhf interlaced antenna. Corey recommended 50mhz IF for vhf and 28 for uhf in order to have less interaction. With 2 slices opened one on vhf and one in uhf xvta and xvtb (flex 8600) when I transmit with 20 watts in vhf I hear myself on harmonics in uhf. Anyone is facing same issue. What can I do? Does it require band pass filters? Cause I never saw anyone discussing about this.

Thanks

Comments

  • K9YK
    K9YK Member ✭✭

    Have you tried a low pass (or band pass) filter after the 2m Transverter and a high pass filter on the 70cm transverter? Those may help. Could also be the 'rusty bolt' issue that often plagues a lot of repeater owners. Full duplex can be a pain at times.

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    You can get some mutual interaction between VHF and UHF due to the harmonics. You might want to try using a bit less than full power on VHF and that will reduce the interaction.

    On my satellite station, the feedline for VHF and UHF run parallel for 60' and just due to mutual induction, I can get some cross band interference.

    Adding some sort of low pass filter on the VHF feedline (like 1/2 of a diplexor) may resolve your issue.

  • F4BPO
    F4BPO Member ✭✭

    Hi both,

    Ok I did not expect to see that, will look into some band pass filters.

    Thanks

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