I got one to use as a garage radio. All i can say is it is very loud and sounds GREAT and swings to 16 watts from a 3 watt key with 100%+ modulation. It's one of those old radios that doesn't have to swing like a backyard swing set to sound choice. Can this radio be modded for lower channels?
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Cobra 86 XLR
- Thread starter Staybolt
- Start date
STAYBOLT-
HERE YOU GO. 73s
-Sluggo
..................................................................................................
TC5080P AM Mod #2
Cobra 32XLR, Cobra 86XLR, Tram D42, etc.
1. Locate Pin 8 of the 5080 PLL. There will be a green wire connected to it. The other end of this green
wire goes to Pin 13. Carefully unsolder the green wire from Pin 8. Next remove the excess solder from
the Pin 8 land with some solder wick. Once this is done make a small cut with an ex-acto knife in order to
isolate just Pin 8 of the 5080 PLL. Be sure to totally isolate this pin. Next carefully solder a 100k 1/4watt
resistor from Pin 8 to ground. Now re-solder the green wire to the other side of the cut.
2. Next mount 2 SPST toggle in a convenient location. Be sure to orient the poles of the two switches as
shown in the above diagram. Next using some 4 wire ribbon cable connect the switches to the circuit
board as shown in the above diagram. Be sure to check for any solder bridges that may have occurred
while soldering the wires to the PLL chip. Once completed your conversion should match the diagram
above. Refer to the 5080 Channel Chart below for your new frequencies.
POSITION #1 SW-1 Down and SW-2 DOWN = Normal Channels
POSITION #2 SW-1 UP and SW-2 UP
3=26.665
4=26.685
5=26.695
6=26.705
7=26.715
8=26.735 9=26.745
10=26.755
11=26.765
12=26.785
13=26.795
14=26.805 15=26.815
16=26.835
17=26.845
18=26.855
19=26.865
20=26.885 21=26.895
22=26.905
23=26.935
24=26.915
25=26.925
26=26.945
POSITION #3 SW-1 UP and SW-2 DOWN
11=27.405
12=27.425
13=27.435
14=27.445 15=27.455
16=27.475
17=27.485
18=27.495 19=27.505
20=27.525
21=27.535
22=27.545
HERE YOU GO. 73s
-Sluggo
..................................................................................................
TC5080P AM Mod #2
Cobra 32XLR, Cobra 86XLR, Tram D42, etc.
1. Locate Pin 8 of the 5080 PLL. There will be a green wire connected to it. The other end of this green
wire goes to Pin 13. Carefully unsolder the green wire from Pin 8. Next remove the excess solder from
the Pin 8 land with some solder wick. Once this is done make a small cut with an ex-acto knife in order to
isolate just Pin 8 of the 5080 PLL. Be sure to totally isolate this pin. Next carefully solder a 100k 1/4watt
resistor from Pin 8 to ground. Now re-solder the green wire to the other side of the cut.
2. Next mount 2 SPST toggle in a convenient location. Be sure to orient the poles of the two switches as
shown in the above diagram. Next using some 4 wire ribbon cable connect the switches to the circuit
board as shown in the above diagram. Be sure to check for any solder bridges that may have occurred
while soldering the wires to the PLL chip. Once completed your conversion should match the diagram
above. Refer to the 5080 Channel Chart below for your new frequencies.
POSITION #1 SW-1 Down and SW-2 DOWN = Normal Channels
POSITION #2 SW-1 UP and SW-2 UP
3=26.665
4=26.685
5=26.695
6=26.705
7=26.715
8=26.735 9=26.745
10=26.755
11=26.765
12=26.785
13=26.795
14=26.805 15=26.815
16=26.835
17=26.845
18=26.855
19=26.865
20=26.885 21=26.895
22=26.905
23=26.935
24=26.915
25=26.925
26=26.945
POSITION #3 SW-1 UP and SW-2 DOWN
11=27.405
12=27.425
13=27.435
14=27.445 15=27.455
16=27.475
17=27.485
18=27.495 19=27.505
20=27.525
21=27.535
22=27.545
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