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Old 11-24-2015, 11:44 PM   #1
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Default 96 3200SCR TV antenna and pre amp

Next project!
The little TV antenna amplifier in the cabinet has a burned up resistor, to the point of I cannot make out the color codes. (Anyone? anyone?)
Manufacture is long gone.
And does the little round (factory) antenna work for anyone? Haven't seen the little red led ever light up, but that could be due to the burnt resistor.
I have a backup plan, (Dish network/ tailgater pro)but wanted to see what I could do with this first.
Jim



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Old 11-25-2015, 12:39 AM   #2
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Jim, Since the digital TV switch, you need a different antennae to get over the air channels. If you want to replace, you should be able to get the powered amp at any RV parts dealership.
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Old 11-25-2015, 12:41 AM   #3
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With just the coax going out to the arch, I can get 4 digitals channels now!
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Old 11-25-2015, 01:42 AM   #4
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Jim I am not seeing any active components on the board other than the diode which is split wide open, not sure this is an amp or just a splitter as it has a connection to tie the TV and radio to the antenna.

Also the shields of the coax should be tied to the ground otherwise signal integerity is impacted.

Is there more to this thing?
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Old 11-25-2015, 08:13 AM   #5
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Nope, about it. The important part is the +9v it is supposed to pass to the antenna itself. That is where the amplification happens, i suppose.
The coax shields all have metal clamps that connect them to circuit board/traces.
Shown removed in the pics.
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Old 11-25-2015, 08:15 AM   #6
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In the first pic, the two screws, closest to my thumb, is where the +12v from the boat connects.
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Old 11-25-2015, 01:11 PM   #7
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Looking at the picture again I can see the impression the clamp made on the upper cable.

There is a place in Tx called fixyourboard that repairs all kinds of circuit boards, you may want to call them and see if they can fix it. I used them to fix an oven board that went bad and discontinued.

This is a simple two sided board that splits the antenna to the TV and radio as well as couples the 12V onto the antenna coax to power the amp in the antenna assembly.
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Old 11-25-2015, 01:25 PM   #8
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Jim studying the pictures some more it appears the the diode and resistor are in series and that the diode is connected to the power and the resistor to the center conductor of the coax. This is how power is coupled onto the antennas coax.
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Old 11-25-2015, 01:31 PM   #9
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Any ideas about the values?
Diode IN4002? Resistor?
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Old 11-25-2015, 01:43 PM   #10
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The diode is of the IN4000 series and a IN4002 will probably work.

Can you post a closer shot of the resistor as it blurs when I zoom in?
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