| Author |
Message |
    
snuffy
| | Posted on Sunday, June 24, 2001 - 12:21 pm: | 
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i have a galaxy saturn radio can anyone tell me how to put variable
talkback in this radio. thank you |
307 (307)
| | Posted on Sunday, June 24, 2001 - 4:32 pm: |
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Get a 500 Ohm Pot from Radio Shack and put the center pin to the Speaker output "return" and one of the end contacts of the pot to "chassis" ground. |
Balasco
| | Posted on Monday, June 25, 2001 - 7:48 pm: |
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Would this work on a washington(uniden)base also? |
307 (307)
| | Posted on Tuesday, June 26, 2001 - 10:23 am: |
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Yes it will! |
snuffy
| | Posted on Tuesday, June 26, 2001 - 6:18 pm: |
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thank you 307 |
anonymous tech
| | Posted on Tuesday, June 26, 2001 - 6:09 pm: |
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this will work on the cobra/uniden chassis, but not the galaxy as in the topics primary question.
for the cob/un, the speaker is grounded in rx but not tx. so by using a pot to gnd, then the speaker has a variable "return" path to gnd during tx. and since the audio for rx and tx flows through the audio ic in the cob/un there will be audio (talkback) during tx.
for the galaxy, the speakers "return" is always grounded. a pot here would do nothing. also the audio on tx does not go through the audio ic. so there is no way to get talkback like that. |
307 (307)
| | Posted on Tuesday, June 26, 2001 - 8:40 pm: |
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Hmm..I have been doing it for quite some time , I possibly confused the term return though and will grab a rig and look... |
Anonymous
| | Posted on Sunday, September 09, 2001 - 8:43 am: |
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What is the speaker output return? Where is it located in a Cobra 2000? Is chassis ground the metal "frame" of the radio? |
Ryan McDonald
| | Posted on Monday, November 26, 2001 - 3:37 pm: |
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Can anyone tell me how to put varible talkback into my galaxy 55. I heard of a mod using a 50k pot and a 57k 1/4 watt resistor in line but i don't remember the whole thing. Any and all help is greatly appreciated. |
Superbazooka
| | Posted on Thursday, January 24, 2002 - 9:52 pm: |
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I cant remember exactly what the value of the pot was but I bought a variable pot with a off position at Radshack that was in a large frame " size of the volume knob on a mobile--not the value just the frame the pot was mounted in" I bought a pack of knobs that fit it and inside the saturn, on the back right of the component side, there is a resistor --again cant remember what the resistor placement # is --mabey someone can fill in the blanks for me--its been over 3 yrs ago that I did this---I desolidered one side of the resistor from the board, solidered in a wire where the one side of the resistor was, then connect the wire to the large frame pot that I put in the back of the radio, and solidered a wire to the other side of the resitor and then to the pin or leg to the pot and solider the other wire to the other leg on the pot. Before you solider the wires to the pot, hold or tape them to the legs to see if you have the right wire to the right leg. You know you do if you can cut the pot on and key up and you can hear yourself and are able to adjust the volume of talk back with the pot. I hope mabey 307 or someone can help fill in the blanks for me.
73's Superbazooka |
Ncrebel
| | Posted on Friday, January 25, 2002 - 10:53 am: |
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I put talkback in my radio and it fried the audio chip. |
Weakeststation
| | Posted on Monday, September 02, 2002 - 7:51 pm: |
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i wonder how it would be done if the radio doesn't have a pa jack like the comanche warrior base??? |
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