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Is this normal? Spikes on TX
K1ESE
Member ✭✭✭
Is this normal? Using my Flex 6500 and SmartSDR 1.6.1 and 4 watts output, the panadapter screen shows many spikes on the transmitted signal. Here's 17m.
13 watts on 20 Meters on a finer scale -
It's similar on all bands, worse on 20m better on 80m, but there on all.
73 de K1ESE
John
13 watts on 20 Meters on a finer scale -
It's similar on all bands, worse on 20m better on 80m, but there on all.
73 de K1ESE
John
1
Comments
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Maybe RF in the Radioshack?0
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Turn off the RF preamp. You should never need it on 20m. Once you do that, see what difference it makes to the spectrum display on transmit.0
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Tim -
Here's with the preamp off -
73 de K1ESE
John0 -
Mine does this on 40. Now I have to find the preamp.
0 -
preamp on 40m?0
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John - based on the pic with the preamp turned off, I have changed this post to a problem topic and converted it to a support HelpDesk ticket (http://helpdesk.flexradio.com) for expedited issue resolution. If anyone else is experiencing an issue similar to this one, please submit a HelpDesk support ticket for issue resolution.0
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I have recently noticed the same issue on my 6500. I think it may have started when I turned on mic bias in order to use a new headset, but I'm not sure.
I will submit a Helpdesk ticket.
Larry, KC1DAD
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Hi Tim
I think these are a non-issue:
https://community.flexradio.com/flexradio/topics/strange-tx-spikes-20m
k3Tim0 -
Not the same issue. The spectrum is different; it should not look like that on CW / TUNE.0
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Sorry Tim - my mistake. Back to the bottom of the Elmer promotion list.
Anyway I tried to duplicate and with 10 watts into dummy load @ 14.010Mc see similar results. The grunge is 85 dB down though.
TiM0 -
This is what mine looks like.
0 -
Tim, I'll open a HelpDesk ticket with four different ham band pictures, both CW and SSB, in the 10 watt tune position. Same thing... 73, Dave Hamm K4EET
Edit: Since the server is still down, I'll post the pictures here so you can see them sooner...
Firmware Version 1.7.30.780 -
Tim -
Thank you. Dudley had me try a few things and now it's headed back to the mothership for repair.
73 de K1ESE
John0 -
Mine looks like yours now Tim. Trying to determine what changed other than clock
Back to the top of the Elmer Promotion list for me!
k3Tim
time.
0
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