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Post by Sonwatcher on Dec 17, 2008 12:37:22 GMT -5
Does anyone know if there is a way on an FT-101 to monitor tx audio ?
Thanks
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Post by Marc on Dec 17, 2008 14:05:35 GMT -5
Do you mean through head phones or a scope?
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Post by Sonwatcher on Dec 17, 2008 14:23:37 GMT -5
through headphones or speaker
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Post by Sniper..Unit 305 on Dec 17, 2008 14:33:19 GMT -5
I have an old external Palomar watt meter that has an option to plug a headset or speaker in to monitor output audio. I know there are many newer meters that also have this function ! Sniper
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Post by Marc on Dec 17, 2008 14:37:40 GMT -5
There is a simple circuit using a gr diode . it is the old Cristal diode radio with a few mods . I use one very simple to build.
I will do a step by step and post it here tonight .
Marc ( with pics)
OK with you?
Marc
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Post by Sonwatcher on Dec 17, 2008 14:41:50 GMT -5
Thanks. I didn't know with all the different connections on the back of the radio if there was something giving monitor capability .
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Post by Marc on Dec 17, 2008 14:49:17 GMT -5
Not for phones but there is for the monitor scope.
I will work on the how-to and get it posted for you( does require
1 1N34 or 34A germanium diode they can be hard to find mouser has them you can find them in old SWR meters also.
this works only with head phones a speaker would cause all sorts of feedback.
Marc (I am still working on this step by step hope to have it by sat night could not find my usb cable for camera).
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Post by twentytwozero on Dec 21, 2008 14:05:22 GMT -5
The easiest way I have found to monitor your transmitted audio is to plug a set of headphones into another radio or scanner - no antenna required. Tune it to the same frequency, turn the rf gain down and adjust the volume to a suitable level. Then make any adjustments needed to your transmitted signal until you are satisfied with the way it sounds. Once done, turn the receiving radio/scanner off and remove the headphones. This method also lets you hear how your transmitted audio actually sounds 'on the air' as opposed to sampling it along the audio chain of the radio - which can sound completely different from your transmitted audio.
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Post by Tombstone (R.I.P.) on Dec 21, 2008 17:32:29 GMT -5
Yeah, that's true with another radio as a monitor, I have one on my bench for just that purpose. I also have meters with a headphone jack that monitors audio. If you want to monitor modulation closely then a scope is mandatory. All said it's how the radio sounds on the air. Just my thoughts.
Tombstone
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