Squelch setting on TH-D72a for FM birds - newbie question
Pretty excited I heard my first satellite tonight, but not without beginner's mistakes. I was not trying to hit the satellite with TX tonight, just listening to learn the proper exchange.
I think I did my homework and have programmed SO-50 frequencies in my TH-D72a correctly. I put the radio TX in the VFO "B" position, and all of the RX in the "A" and turned on full duplex. I left the squelch one up from open. I hooked my arrow antenna up, and held the antenna right at the satellite. Nothing. Then I switched to VFO A (RX) and held the monitor (squelch open) and heard some folks. While still in VFO A, I switched memory locations while holding the monitor on, to make sure I was on frequency (these RX memories account for doppler). When I heard a QSO, I let go of the monitor and the signal did not break squelch.
So my question: Must I leave squelch all the way wide open when working FM satellites?
If so, I guess that I need to buy some headphones so I do not introduce feedback into the TX side while in full duplex.
Could some of you seasoned satellite folks help a new guy out?
thank you Kevin (KK4YEL)
No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced !
El 17/03/16 a las 11:36, kevino z escribió:
So my question: Must I leave squelch all the way wide open when working FM satellites?
If so, I guess that I need to buy some headphones so I do not introduce feedback into the TX side while in full duplex.
Dear Kevin,
Yes and yes. It is usual to leave the squelch open. Although during most of the pass the signal would be enough to open your squelch if you leave it in the lowest setting, really the squelch setting is the last thing you should be worrying about.
Using headphones to avoid feedback is a must. It also helps you a little to pick signals out of the noise in bad conditions.
73,
Dani EA4GPZ.
Short answer is yes.
Jim - K6CCC
---------------------------------------- From: "kevino z" z_kevino@hotmail.com Sent: Thursday, March 17, 2016 4:17 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Squelch setting on TH-D72a for FM birds - newbie question Pretty excited I heard my first satellite tonight, but not without beginner's mistakes. I was not trying to hit the satellite with TX tonight, just listening to learn the proper exchange.
I think I did my homework and have programmed SO-50 frequencies in my TH-D72a correctly. I put the radio TX in the VFO "B" position, and all of the RX in the "A" and turned on full duplex. I left the squelch one up from open. I hooked my arrow antenna up, and held the antenna right at the satellite. Nothing. Then I switched to VFO A (RX) and held the monitor (squelch open) and heard some folks. While still in VFO A, I switched memory locations while holding the monitor on, to make sure I was on frequency (these RX memories account for doppler). When I heard a QSO, I let go of the monitor and the signal did not break squelch.
So my question: Must I leave squelch all the way wide open when working FM satellites?
If so, I guess that I need to buy some headphones so I do not introduce feedback into the TX side while in full duplex.
Could some of you seasoned satellite folks help a new guy out?
thank you Kevin (KK4YEL)
No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced ! _______________________________________________ Sent via AMSAT-BB@amsat.org. 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
participants (3)
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Daniel Estévez -
Jim Walls -
kevino z