[Flexradio] FlexRadio Digest, Vol 139, Issue 3

Mark Lunday

2016-11-28 02:00:29 UTC

Negative. I checked with Rx2 and I can see a spur = 2x the sidetone frequency, down if using CW-U, up if using CW-L.

I have opened a ticket with Flex, as there is a known but uncommon issue with spurs on CW on 80 and 160.

Sent from my Windows Phone
________________________________
From: George J Molnar<mailto:***@molnar.com>
Sent: ‎11/‎26/‎2016 2:01 PM
To: ***@flex-radio.biz<mailto:***@flex-radio.biz>
Subject: Re: [Flexradio] FlexRadio Digest, Vol 139, Issue 3

One thing that sometimes happens is inadvertently leaving TX on the DX frequency. Could that have occurred?

George J. Molnar
@GJMolnar

> On Nov 26, 2016, at 12:00 PM, flexradio-***@flex-radio.biz wrote:
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> Today's Topics:
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> 1. Re: Question about TX harmonics (Ray Andrews, K9DUR)
> 2. Re: Question about TX harmonics (GARY HUBER)
>
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 25 Nov 2016 13:14:39 -0500
> From: "Ray Andrews, K9DUR" <***@k9dur.info>
> To: ***@flex-radio.biz
> Subject: Re: [Flexradio] Question about TX harmonics
> Message-ID: <15c57b48-31f9-2bff-849f-***@k9dur.info>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
> Mark,
>
> 1.2 kHz down would be an image response of your xmt signal if the
> sidetone frequency is the default value of 600 Hz -- as if the opposite
> sideband was not being suppressed.
>
> You did not say what type of radio. IF FLEX-1500, FLEX-3000, or
> FLEX-5000, try doing a reset to factory defaults. Starting with a clean
> database cures a myriad of ailments.
>
> 73, Ray, K9DUR
> http://k9dur.info
>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 25 Nov 2016 18:30:57 +0000
> From: GARY HUBER <***@msn.com>
> To: "***@flex-radio.biz" <***@flex-radio.biz>
> Subject: Re: [Flexradio] Question about TX harmonics
> Message-ID:
> <***@CY1PR0501MB1452.namprd05.prod.outlook.com>
>
> Content-Type: text/plain; charset="Windows-1252"
>
> Mark, I no longer have your original message, but if the "spur" was 1.2
> kHz as I recall, I'm wondering if you have a local AM broadcast station
> which may have mixed in your final. I have seen sum and difference
> products from local transmitters mixing in a transmitter result in
> "spurs". Sometimes it is a matter of running intermod calculations on
> the local transmitters, identifying what is getting into your PA and
> then filtering them to prevent further problems. I'm not say its one
> transmitter, it could be two or more or it may not even be a mixing
> problem... just a thought outside the box.
>
> 73 ES DX,
> Gary - AB9M
>
>> On 11/25/2016 11:47 AM, Mark Lunday wrote:
>> Thanks Patrick.
>>
>> It was two stations about 700 miles away in different directions.
>>
>> Instead of harmonic, I should have said Spur. I shall open a ticket with
>> Flex.
>>
>> Mark Lunday, WD4ELG
>> Greensboro, NC FM06be
>> ***@arrl.net
>> http://wd4elg.blogspot.com
>>
>>
>> -----Original Message-----
>> From: FlexRadio [mailto:flexradio-***@flex-radio.biz] On Behalf Of
>> Patrick Greenlee
>> Sent: Friday, November 25, 2016 8:27 AM
>> To: ***@flex-radio.biz
>> Subject: Re: [Flexradio] Question about TX harmonics
>>
>> Mark, Harmonics are integral multiples of your frequency so whatever was
>> happening it wasn't a harmonic of your signal.
>>
>> How close was the reporting station to your QTH? Strange things happen when
>> someone experiences fundamental overload of their receiver. If able,
>> arrange to have a look at your emissions on a good spectrum analyzer. It
>> might not be something you are emitting but something created in his
>> receiver.
>>
>> One time in the early 60's I was reported to the FCC as causing TVI. I had
>> a 2nd class licensee prepare a fact finding report in response to "The
>> Letter" from the FCC. I was putting out a very clean 3 Watts on the CB band
>> and the "ancient" TV I was interfering with had an IF with band width
>> covering the CB freqs. I was transmitting directly into one of the TV
>> receiver's IF circuits. Solution: Hey dude, get a more modern TV. End of
>> story.
>>
>>
>>
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> End of FlexRadio Digest, Vol 139, Issue 3
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