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TV jack resistance

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Old 11-26-2018, 01:02 PM   #1  
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Default TV jack resistance

I have a new Samsung QLED Q6 TV. Not receiving any OTA channels. When I connect the antenna and amplifier the amplifier power light goes out. I measured the jack at the TV and it measures 2 ohms to ground (center pin to shielding) What should the resistance be?
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Old 11-26-2018, 02:12 PM   #2  
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Hello, roevan; welcome to the forum.

I don't think it is a good idea to measure the resistance at the antenna input jack of the TV. The ohmmeter uses voltage to measure resistance. Anyway, the measurement isn't conclusive, because different TVs have different antenna input circuits.

The fact that the preamp light goes out indicates a possible short in the coax to the antenna.

What antenna, preamp, and power inserter are you using?
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Old 11-26-2018, 05:51 PM   #3  
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Quote:
The ohmmeter uses voltage to measure resistance.
Technically, it uses current...

Quote:
When I connect the antenna and amplifier the amplifier power light goes out.
When you're connecting what to what?
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Old 11-26-2018, 08:24 PM   #4  
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Be sure you have the amps power inserter connected in the right direction.

One end should be marked ANT the other TV or SET.

And the TV antenna input is a 75 ohm impedance not 75 ohms resistance, you would need an impedance meter to check the ANT input.
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Old 11-26-2018, 10:20 PM   #5  
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Quote:
Originally Posted by projectsho89 View Post
Technically, it uses current...
Picky, picky

Current flow requires voltage. No voltage, no current flow.

Excess voltage destroys solid state devices, like in the tuner of an expensive TV.
Quote:
When you're connecting what to what?
Good question; I would like to know that too. He did say this:
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Originally Posted by roevan View Post
When I connect the antenna and amplifier the amplifier power light goes out.
But we need more than that.

Last edited by rabbit73; 11-26-2018 at 10:31 PM..
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