UK Vintage Radio Repair and Restoration Discussion Forum

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-   Television Standards Converters, Modulators etc (https://www.vintage-radio.net/forum/forumdisplay.php?f=95)
-   -   Advice on HDMI to RF converter (https://www.vintage-radio.net/forum/showthread.php?t=164024)

Mark Morb 19th Feb 2020 1:00 pm

Advice on HDMI to RF converter
 
Hi,

Before I click the button on this I thought I would just run it past you guys. All I'm looking for is something that will take a signal from a DVD player (or mini media device) via HDMI and whack it out to my little Ingersoll XK510 B&W TV just using the external aerial socket. It's just for display purposes, but want to get the old test card up on it....

Looks like a cheap Chinese box but if it works then that is good enough for me.

Here's the Ebay link:

https://bit.ly/2V6Icav

It does say it supports PAL-BG, PAL-1, PAL-DK and NTSC-M

Thanks in advance.
Mark

chriswood1900 19th Feb 2020 2:45 pm

Re: Advice on HDMI to RF converter
 
These have been on the forum before and I believe the RF out is at low VHF frequencies to suite US type TVs, it would need some modification to use in the UK.
Probably better to get an HDMI to composite converter and separate UK modulator.

Mark Morb 19th Feb 2020 2:54 pm

Re: Advice on HDMI to RF converter
 
Quote:

Originally Posted by chriswood1900 (Post 1218464)
These have been on the forum before and I believe the RF out is at low VHF frequencies to suite US type TVs, it would need some modification to use in the UK.
Probably better to get an HDMI to composite converter and separate UK modulator.

Thanks for the reply Chris, bit naughty of them to call it a "UK Signal Coaxial converter" and put all the stuff in about PAL output...but that's why I thought I'd check on here first.

Thanks,
Mark

AndiiT 19th Feb 2020 9:52 pm

Re: Advice on HDMI to RF converter
 
Quote:

Originally Posted by chriswood1900 (Post 1218464)
...Probably better to get an HDMI to composite converter and separate UK modulator...

From experience the above option doesn't always work well due to what appears to be an impedance mismatch between the composite output of the HDMI convertor and the associated modulator.

This may be a better option despite being a little more expensive; I have obtained them from a UK seller in the past, however am unable to find them currently.

Regards

Andrew

simpsons 20th Feb 2020 11:49 am

Re: Advice on HDMI to RF converter
 
Looking at the eBay.com site, the RF output is shown as 61.25 Mhz. The UK reference is to the mains plug supplied. In addition, the instructions show that the RF frequency is fixed.

There are inexpensive HDMI to composite converters and in addition RF modulators or perhaps you could use a video recorder to do the modulator part.

I've used both Amazon 10 and 30 converters and noticed that setting PAL/NTSC has quite an effect on the quality of conversion. If memory is right, the NTSC comb filter gave a much better frequency response when using a test card input.

Good luck

Chris


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