Hi
I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
Mark

I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.

Rich
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:Hi
: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
:Mark
:

:I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.
:
:Rich
:&&&&&&&&&&&&&&&&&&&&&&&&
:
::Hi
:: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
::Mark
::Hi Rich
Well I've tried it with just a simple Balun, I get the channels, but not without alot of interference, by the way this is a very old TV, its a 1948 Zenith with only a Twin lead VHF input terminal, if that makes any difference.
Mark

::I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.
::
::Rich
::&&&&&&&&&&&&&&&&&&&&&&&&
::
:::Hi
::: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
:::Mark
:::Hi Rich
: Well I've tried it with just a simple Balun, I get the channels, but not without alot of interference, by the way this is a very old TV, its a 1948 Zenith with only a Twin lead VHF input terminal, if that makes any difference.
:Mark
:
You are probably getting pick-up of local channels via the length of twin-lead that runs from the Antenna terminals back to the tuner box. I suppose you could try shielding this portion with some aluminum foil, but that may not work.

Rich

:::I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.
:::
:::Rich
:::&&&&&&&&&&&&&&&&&&&&&&&&
:::
::::Hi
:::: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
::::Mark
::::Hi Rich
:: Well I've tried it with just a simple Balun, I get the channels, but not without alot of interference, by the way this is a very old TV, its a 1948 Zenith with only a Twin lead VHF input terminal, if that makes any difference.
::Mark
::
:You are probably getting pick-up of local channels via the length of twin-lead that runs from the Antenna terminals back to the tuner box. I suppose you could try shielding this portion with some aluminum foil, but that may not work.
:
:Rich
:Hi Rich
Yep, thats what I'm thinking too, wish there was a way to convert this 300 Ohm Twin Lead input on the set too a 75 Ohm Input, that would probably solve the problem, thing is I have no idea how too do this.
Mark

::::I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.
::::
::::Rich
::::&&&&&&&&&&&&&&&&&&&&&&&&
::::
:::::Hi
::::: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
:::::Mark
:::::Hi Rich
::: Well I've tried it with just a simple Balun, I get the channels, but not without alot of interference, by the way this is a very old TV, its a 1948 Zenith with only a Twin lead VHF input terminal, if that makes any difference.
:::Mark
:::
::You are probably getting pick-up of local channels via the length of twin-lead that runs from the Antenna terminals back to the tuner box. I suppose you could try shielding this portion with some aluminum foil, but that may not work.
::
::Rich
::Hi Rich
: Yep, thats what I'm thinking too, wish there was a way to convert this 300 Ohm Twin Lead input on the set too a 75 Ohm Input, that would probably solve the problem, thing is I have no idea how too do this.
:Mark

The input to the tuner is 300 ohms. If you can move the balun transformer to a location right at the tuner input, then you can run 75 ohm coaxial cable from the tuner to the back cover of the TV. Drill a hole in the fiberboard back and mount an F-type cable chassis connector. I think you can get them at Radio Shack. You may have to ground the outside shield of the 75 ohm cable to the TV chassis to eliminate the interference. It' worth a try unless you are reluctant to drill hole in the TV back panel. Rich
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

:::::I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.
:::::
:::::Rich
:::::&&&&&&&&&&&&&&&&&&&&&&&&
:::::
::::::Hi
:::::: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
::::::Mark
::::::Hi Rich
:::: Well I've tried it with just a simple Balun, I get the channels, but not without alot of interference, by the way this is a very old TV, its a 1948 Zenith with only a Twin lead VHF input terminal, if that makes any difference.
::::Mark
::::
:::You are probably getting pick-up of local channels via the length of twin-lead that runs from the Antenna terminals back to the tuner box. I suppose you could try shielding this portion with some aluminum foil, but that may not work.
:::
:::Rich
:::Hi Rich
:: Yep, thats what I'm thinking too, wish there was a way to convert this 300 Ohm Twin Lead input on the set too a 75 Ohm Input, that would probably solve the problem, thing is I have no idea how too do this.
::Mark
:
:The input to the tuner is 300 ohms. If you can move the balun transformer to a location right at the tuner input, then you can run 75 ohm coaxial cable from the tuner to the back cover of the TV. Drill a hole in the fiberboard back and mount an F-type cable chassis connector. I think you can get them at Radio Shack. You may have to ground the outside shield of the 75 ohm cable to the TV chassis to eliminate the interference. It' worth a try unless you are reluctant to drill hole in the TV back panel. Rich
:&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
Hi Rich
Well I solved the problem, the contacts on the tuner for CH4 were extremely dirty, I cleaned all of them then retuned CH4 with VCR hooked up and alakazam I now have a pretty good picture on all of the cable channels, considering I have a fairly long run of cable to feed it, looks nice:). As too grounding the Shield on the cable, no can do, on this chassis the top portion of it is run hot, and I'm not much for sparks flying everywhere LOL, thanks for your help on this, by the way you were right a simple Balun works, probably not as good as a direct 75 Ohm coax would, but at least its a half way decent picture and thats what counts:)
Mark

Make sure that the television is plugged in so that the chassis isn't hot. You can connect a .05 MFD 400 WVDC condenser between the television and the cable shielding, though the cable shielding should probably receive a ground from some other source like through the VCR and the cable company's cable.

There are variations in 300 to 75 ohm transformer converters. If your transformer (balun) is not of the highest quality, and doesn't pass all signals well, this may affect the clarity of your picture, though in black and white this may not be evident. A lot of interference you see on a color television won't show up on a B&W because it affects the color signal only. Also, cables with a wide separation between the center conductor and the shielding have less capacitance between the two, and pass high frequencies better--clearer picture. These are just things to think about.

Thomas

I assume that you have recapped the set and gone over all of the electronics. Otherwise it might not be a good idea to use the set on a regular basis until all has been gone over.

Thomas

:I assume that you have recapped the set and gone over all of the electronics. Otherwise it might not be a good idea to use the set on a regular basis until all has been gone over.
:
:Thomas
Hi Thomas
Yes the entire set has been gone through and recapped as well as resistors that were out of tolerance, all tubes have been tested and replaced as needed and last the CRT has also been replaced.
As far as the chassis being hot, there is a sticker right on the back of the chassis stating that the top portion of it is hot, with that in mind would you still connect a .05uf from the chassis ground to the ground on the cable?
Mark

::::::I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.
::::::
::::::Rich
::::::&&&&&&&&&&&&&&&&&&&&&&&&
::::::
:::::::Hi
::::::: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
:::::::Mark
:::::::Hi Rich
::::: Well I've tried it with just a simple Balun, I get the channels, but not without alot of interference, by the way this is a very old TV, its a 1948 Zenith with only a Twin lead VHF input terminal, if that makes any difference.
:::::Mark
:::::
::::You are probably getting pick-up of local channels via the length of twin-lead that runs from the Antenna terminals back to the tuner box. I suppose you could try shielding this portion with some aluminum foil, but that may not work.
::::
::::Rich
::::Hi Rich
::: Yep, thats what I'm thinking too, wish there was a way to convert this 300 Ohm Twin Lead input on the set too a 75 Ohm Input, that would probably solve the problem, thing is I have no idea how too do this.
:::Mark
::
::The input to the tuner is 300 ohms. If you can move the balun transformer to a location right at the tuner input, then you can run 75 ohm coaxial cable from the tuner to the back cover of the TV. Drill a hole in the fiberboard back and mount an F-type cable chassis connector. I think you can get them at Radio Shack. You may have to ground the outside shield of the 75 ohm cable to the TV chassis to eliminate the interference. It' worth a try unless you are reluctant to drill hole in the TV back panel. Rich
::&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
:Hi Rich
: Well I solved the problem, the contacts on the tuner for CH4 were extremely dirty, I cleaned all of them then retuned CH4 with VCR hooked up and alakazam I now have a pretty good picture on all of the cable channels, considering I have a fairly long run of cable to feed it, looks nice:). As too grounding the Shield on the cable, no can do, on this chassis the top portion of it is run hot, and I'm not much for sparks flying everywhere LOL, thanks for your help on this, by the way you were right a simple Balun works, probably not as good as a direct 75 Ohm coax would, but at least its a half way decent picture and thats what counts:)
:Mark
:

Hi Mark,
How many channels off the cable do you get?
Bill

:::::::I would think that a simple 300 ohm to 75 ohm transformer (balun) should work. It's what I used when I got my first VCR. The VCR should convert all of the cable stations to an output on either Ch. 3 or Ch. 4 of your TV.
:::::::
:::::::Rich
:::::::&&&&&&&&&&&&&&&&&&&&&&&&
:::::::
::::::::Hi
Hi bill
I get 3,6,7 and 12, but 12 is not really good, the area I'm in has alot of interference, so I'm lucky too get these channels, and these are the only over the air channels that are available here.
Mark

:::::::: I have an older Television Set that does not have a Coax input connector, and want to connect a Cable ready VCR to this unit, I'm quite sure it involves more than just connecting a Balun between the two, my question is what would I need and next where would I get one of these things to do this?
::::::::Mark
::::::::Hi Rich
:::::: Well I've tried it with just a simple Balun, I get the channels, but not without alot of interference, by the way this is a very old TV, its a 1948 Zenith with only a Twin lead VHF input terminal, if that makes any difference.
::::::Mark
::::::
:::::You are probably getting pick-up of local channels via the length of twin-lead that runs from the Antenna terminals back to the tuner box. I suppose you could try shielding this portion with some aluminum foil, but that may not work.
:::::
:::::Rich
:::::Hi Rich
:::: Yep, thats what I'm thinking too, wish there was a way to convert this 300 Ohm Twin Lead input on the set too a 75 Ohm Input, that would probably solve the problem, thing is I have no idea how too do this.
::::Mark
:::
:::The input to the tuner is 300 ohms. If you can move the balun transformer to a location right at the tuner input, then you can run 75 ohm coaxial cable from the tuner to the back cover of the TV. Drill a hole in the fiberboard back and mount an F-type cable chassis connector. I think you can get them at Radio Shack. You may have to ground the outside shield of the 75 ohm cable to the TV chassis to eliminate the interference. It' worth a try unless you are reluctant to drill hole in the TV back panel. Rich
:::&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
::Hi Rich
:: Well I solved the problem, the contacts on the tuner for CH4 were extremely dirty, I cleaned all of them then retuned CH4 with VCR hooked up and alakazam I now have a pretty good picture on all of the cable channels, considering I have a fairly long run of cable to feed it, looks nice:). As too grounding the Shield on the cable, no can do, on this chassis the top portion of it is run hot, and I'm not much for sparks flying everywhere LOL, thanks for your help on this, by the way you were right a simple Balun works, probably not as good as a direct 75 Ohm coax would, but at least its a half way decent picture and thats what counts:)
::Mark
::
:
:Hi Mark,
:How many channels off the cable do you get?
:Bill