Phil,
I started out last year using a BF-F8HP and UV-5R for full duplex operation, and sadly experienced desense every single time. Tried the BF as both Tx and Rx radio, desense occured in both. Even stuck band pass filters in the Rx radio feedline... no go.
--Roy
Since a bandpass filter on the receiver did not correct the problem, the issue is likely the third harmonic from the transmitted signal. A receive bandpass filter will naturally pass that third harmonic. What you need is a low pass filter on the transmit radio. Any commercially available diplexer will perform this function.
73,
Paul, N8HM
On Tue, Feb 28, 2017 at 7:48 AM, Roy Dean [email protected] wrote:
Phil,
I started out last year using a BF-F8HP and UV-5R for full duplex operation, and sadly experienced desense every single time. Tried the BF as both Tx and Rx radio, desense occured in both. Even stuck band pass filters in the Rx radio feedline... no go.
--Roy _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
On 28/02/17 22:48, Roy Dean wrote:
Phil,
I started out last year using a BF-F8HP and UV-5R for full duplex operation, and sadly experienced desense every single time.
Thank you Roy and Paul for your replies .
The plan is to move back into a motorhome. Weather this actually eventuates or not depends upon finding a buyer for our house. No doubt any buyer will not be interested in my current extensive station.
Anyway, I'm just exploring far simpler station options at the moment.
participants (3)
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Paul Stoetzer -
Phil -
Roy Dean