Receiver test at the VK5REX D-Star repeater

Receiver De-sense tests performed on the VK5REX 70cm D-Star repeater. This video shows how the repeater receiver is affected by the transmitter during normal operation.
Hopefully we can work out how to reduce or eliminate the de-sense issue in the future.

Category:

Science & Technology

Tags:

• D-Star
• ID-RP4000V
• Repeater
• Tests
• VK5ZEA
• VK5REX

[dv6000hp]

Micheal I really need to know about the icom tuning software that is in expert mode.

[michaelcarey]

@dv6000hp I've sent you a message... check your YouTube message box.

[ke3jpmike]

Hi Micheal i watched your vedio's and would like your doing a great job keep up the good work i just put on a 2 meter d-star repeater and now planning on doing a uhf but i would like to know where can you get the software you are using in this vedio for receiver de-sense

thanks mike ke3jp with the KB3WNO D-star repeater in Greenville , Pa

[archuka1]

Wowie great setup--got some fine tuning to do then now that you found the problem. Yep i know duplexers are expensive and the extra filter should have worked but try removing the extra filter and see what happens -- just a thought, but maybe you tryed that also. Just trying to elimate things in the lines.

Wish ya luck though

N7JJY Wyoming USA

[spymsn]

excellent setup!!!

[dv6000hp]

Great video's... Hoe do you get into expert mode, with the software

[dv6000hp]

Did you ever figure out the problem?

[PanPancerny1986]

Can You show characteristics of that duplexer?

[DW1PJM]

how about using a two (2) antenna system? Could also be a leak in one of your cables?

[cm44126]

Michael,

Try the same test while terminating the output of the duplexer into a high quality dummy load. Make sure you use double-shielded cable like RG-400 or a short run of solid shielded cable like a Heliax for the jumper. If the problem goes away, then the problem is in your antenna or feed line. If it doesn't, try the same test running the TX directly into the dummy load. If the problem goes away now, it's in the duplexer or interconnect cables. Good luck & 73! de WD8OCS - Chris