| Author |
Message |
    
Kabar
Junior Member
Username: Kabar
Post Number: 39
Registered: 6-2003
| | Posted on Thursday, July 26, 2007 - 11:55 am: | 
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Anyone know what the modulation and power adjustments are for the Radio Shack TRC-447 ?
This radio is not listed in the modification list to the left of this page. |
Dale
Senior Member
Username: Dale
Post Number: 1034
Registered: 12-2002
| | Posted on Thursday, July 26, 2007 - 5:03 pm: |
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having problemsd finding it .is it a base or mobile/am or am/ssb
dale/a.k.a.hotrod
cef426
cvc#64
|
Kabar
Junior Member
Username: Kabar
Post Number: 40
Registered: 6-2003
| | Posted on Friday, July 27, 2007 - 2:27 pm: |
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Radio Shack TRC-447 mobile and AM only
There appears to be no AMC variable adjustment in it so I suspect a diode needs to be clipped.
What is the correct diode to remove and what are the power adjustments?
Help is appreciated. |
Dale
Senior Member
Username: Dale
Post Number: 1037
Registered: 12-2002
| | Posted on Friday, July 27, 2007 - 5:59 pm: |
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cant find anything on it.theres no vrs in the radio?sometimes they call them rv
dale/a.k.a.hotrod
cef426
cvc#64
|
Cobra2000
Junior Member
Username: Cobra2000
Post Number: 13
Registered: 6-2007
| | Posted on Wednesday, August 08, 2007 - 1:35 am: |
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This was on the internet. Here you go...
Power is: L7, L8, L9, L12. Modulation is VR12.
LC7185 PLL chip...."not modifiable" or expandible with Expo Kit. |
Kabar
Junior Member
Username: Kabar
Post Number: 42
Registered: 6-2003
| | Posted on Wednesday, August 08, 2007 - 2:35 pm: |
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COBRA 2000 sorry but there are no varible adjustments in the Radio Shack TRC-447 that begin with the prefix of VR.
All varible adjustments begin with RT and the power adjustments in the transmitter section all are a letter and three digits such as L106 as an example.
All varible adjustments are clearly labaled on the circuit board, but there is none for AMC or MOD.
Maybe a diode that needs to be clipped for modulation.
I have not been able to find this info yet.
Thanks for your try. |
Cobra2000
Junior Member
Username: Cobra2000
Post Number: 16
Registered: 6-2007
| | Posted on Friday, August 10, 2007 - 11:16 pm: |
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Sorry, man...
I looked all over the net for about an hour.
I wonder if you can get a service manual from Radio Shack for that radio? 
'Cause apparantly nobody on the net knows a thing about it. |
