RCA U70, UHF to VHF Converter

Here's a quick restoration of an RCA U70 UHF/VHF converter circa 1952.

Category:

Science & Technology

Tags:

• RCA
• U70
• UHF
• VHF
• Converter

[aberdurant]

could i hook cable to it and get the higher channels or is it just over the air

[bandersentv]

@aberdurant There are some odd jacks on the back that I believe would allow you to inject a cable signal. You'd need to make an adapter though and I'm not sure what the impedance is.

[compu85]

What does the isolation transformer do for you while testing?

[bandersentv]

@compu85 Good question. The main reason for using one is protection from a hot chassis. That's a set with no power transformer which presents a real shock hazard. This device does actually have a transformer so it's not really doing anything for me, but I've gotten into the habit of always using it regardless.

[compu85]

@bandersentv So does that mean one side of the incoming power is hooked right to the chassis? Is the danger when the line voltage neutral might not be at a true ground level?

[bandersentv]

@compu85 Yes, it is on some sets. They didn't use polarized plugs on this old stuff either so it's possible for the chassis to be hot.

Others have a floating chassis like the Motorola VT71.

[aberdurant]

thank you for the info

[MarioMania05]

Nice..So the converter broadcast on Ch 5

[GrandCaravanSE]

@bandersentv Thanks, and keep up the great Videos!

[bandersentv]

@GrandCaravanSE It's a JVC GR D270 mini DV camera. It has two bright white LEDs on front.