| Author |
Message |
    
Seymourduncan
| | Posted on Monday, July 28, 2003 - 6:57 pm: | 
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how do you put talk back on radio,,is there a way of jumping across mic or external speaker |
Rippedradio
| | Posted on Tuesday, July 29, 2003 - 1:06 am: |
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jump a 100 ohm resistor across the external speaker and pa jack if you want it louder up the value quiter down the value you can also make it switchable or varible! 73's chris |
Seymourduncan
| | Posted on Tuesday, July 29, 2003 - 4:10 pm: |
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wouldnt you have to by-pass the PA switch |
Kc0gxz
| | Posted on Tuesday, July 29, 2003 - 10:15 pm: |
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Seymourduncan
In a way, that's what you are doing. Just put the 100 ohm resistor where Rippedradio explained in his post and it will work. Put a SPST switch in line with it and you can turn it on or off whenever you want.
Jeff, kc0gxz |
Seymourduncan
| | Posted on Wednesday, July 30, 2003 - 9:43 am: |
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thanks for your help Rippe and Kc0gxz
Seymour Duncan |
frasiercrane
| | Posted on Wednesday, July 30, 2003 - 11:32 am: |
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one correction, higher value, quieter, lower value louder.
I always used 2Watt flameproof resistors for this. |
Kc0gxz
| | Posted on Wednesday, July 30, 2003 - 4:16 pm: |
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frasiercrane
That's right.
Wow. How did that one get by me? Looks like you're the only one that caught it.
Jeff, kc0gxz. |
Seymourduncan
| | Posted on Wednesday, July 30, 2003 - 4:30 pm: |
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thanks frasier |
RCI 2990
| | Posted on Thursday, July 31, 2003 - 1:53 am: |
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My question is, why would a guy want talkback in a radio anyways? I mean if you run any kind of amplified mike it will sqeal like a piggie killing the eardrums when you crack the mike volume up and the RX volume knob!!!!! I know this because its happened to me!! Im just curious thats all no flames intended in any ways.. |
Seymourduncan
| | Posted on Thursday, July 31, 2003 - 2:09 pm: |
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well i use a stock mic and i like to hear what i sound like ,,,,it is just a thing i would like to have,,,im not a power mic fan myself dont like the over modulation that some people get, if they had talk back they could hear there selves and ajust it out. what kind of radio do you have RCI |
frasiercrane
| | Posted on Thursday, July 31, 2003 - 2:27 pm: |
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usually you try to use a resistor value that will give you enough audio to hear it, but not feedback.
one use I've seen for talkback is if you have a reverb, mic with tone control, or speech processor you can hear it while making adjustments.
then again, some people just like to hear themselves talk...
Keep in mind what you are hearing is the audio amp output, not the actual RF output, for that you need some sort of rf detector circuit.. some swr/watt meters have a headphone jack that pick off a bit of the signal and rectify it with a diode so you can hear the actual modulation. |
Rippedradio
| | Posted on Friday, August 01, 2003 - 2:47 am: |
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yep, sorry, you guys are right what was i thinking! or what wasn't i thinking! 73's chris KC0QMB |
Kc0gxz
| | Posted on Friday, August 01, 2003 - 12:17 pm: |
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Seymourduncan
Frasiercrane is absolutely correct.
What you are hearing from your radio's audio amplifier and what others are hearing from that same radio on the air is a completely different matter.
Jeff, kc0gxz. |
Seymourduncan
| | Posted on Friday, August 01, 2003 - 5:00 pm: |
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Kc0, so this is not a true talkback,,this would let you know your mic works. ok dudes i want talk back on the 29 what is the best way to do this.use a board,,,a speaker with TB, OR CROSS OVER from pa to external speaker.
i know witch is cheapest,what do you think.
thanks all |
frasiercrane
| | Posted on Saturday, August 02, 2003 - 9:46 am: |
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you don't really cross over from pa to ext. speaker, the speaker gets it's ground through the mic ptt switch, when you key up it ungrounds the speaker so you don't hear anything through it, so to get talkback you're putting a resistor between the switched side of the speaker and ground, now when unkeyed the mic grounds the speaker as usual, but when you key the resistor allows a bit of audio to still get through. I think the pa/ext spkr. jacks are just a convenient place to connect it.
the resistor is the cheapest, easiest way to go, and it works pretty well, I'd go with that. |
Seymourduncan
| | Posted on Saturday, August 02, 2003 - 11:15 am: |
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hmm sounds to easy Dr.Crane LOL.
im gonna try this thanks Frasier |
Seymourduncan
| | Posted on Wednesday, August 20, 2003 - 6:54 pm: |
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this works very well frasiercrane thanks very much
seymourduncan |
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