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4hv.org :: Forums :: General Science and Electronics
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TV cable impedance to SMA cable impedance, unbalanced, signifigcance ?

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Patrick
Mon Feb 26 2018, 02:41AM Print
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Assuming RG-6 is the normal CATV wire with 75 ohms of impedance and I need to couple to the SMA diameter that is 50 ohms how big of a deal would it be in terms of burning something up and over a short run like 3-5 feet would it matter ?

Im trying to connect a drone camera with heads up display to my flat screen tv for some testing. Without using the transmit feature.

I have 100's of the little SMA connectors of all types so i was thinking of attaching a SMA barrel to RG barrel using some solder copper foil and or silver epoxy. Then heat shrink it nice and pretty.
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2Spoons
Mon Feb 26 2018, 04:54AM
2Spoons Registered Member #2939 Joined: Fri Jun 25 2010, 04:25AM
Location:
Posts: 615
Is this the RF out of the drone camera? Meant to got to an antenna? Or is it composite video?
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johnf
Mon Feb 26 2018, 06:05AM
johnf Registered Member #230 Joined: Tue Feb 21 2006, 08:01PM
Location: Gracefield lower Hutt
Posts: 284
So why not use 75 ohm miniature coax
you will have to solder the centre pin not crimp as the wire diameter is less no problemo
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Sulaiman
Mon Feb 26 2018, 11:29AM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
sorry, a load of irrelevant waffle removed
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