CurtPalme.com Home Theater Forum

gredvig · Joined: 13 Aug 2011 Posts: 12

I have a Electrohome Marquee CRT that no longer works and I want to replace it with a new Epson LCD projector. The BNC cables for the CRT are in the ceiling already and can't be replaced. I'm trying not to buy a wireless HDMI kit. Does anyone know if I can covert those BNC connections for HDMI for connection to the new projector? Also, if so, do your lose the HD picture?

**AnalogRocks** · Posted: Wed Jan 25, 2012 2:59 pm Post subject:

HDMI is 19 pin, you only have 10 conductors to work with in RGBHV, so no.

Plus even if you did have 19 to work with I doubt it would work because HDMI is so flaky.

paw · Joined: 08 Mar 2006 Posts: 1176 Location: Arvada, CO

You have a couple of different options. They will all give you a HD image

Option I
Pre-requisites
1 - If your blu-ray player is not subject to the analog sunset rule, where resolution is limited to 480i over component. This rule applies to any blu-ray player manufactured after 1/1/2012.
2 - Your blu-ray player has component outputs
3 - Your projector has component inputs

blu-ray player -> RCA to BNC adapters -> existing cable (you'll only use 3 cables) -> BNC to RCA adapters -> component input on projector

Of course you could remove the BNC plugs and replace them with RCA plugs. That would eliminate the need for the BNC to RCA adapters

This would be your cheapest route. However, blu-ray players from the past few years have been skimping on the quality of their component video signal path. An older blu-ray player would be a better bet.

Yes, component can pass a HD signal. Maybe not a 3D image though.

Option II.a
Pre-requisites
1 - Your projector has a VGA input

blu-ray player -> HDMI cable -> HDFury -> VGA breakout cable -> line driver -> 5 BNC cable -> VGA breakout cable -> VGA input on projector

You need a line driver, like a NEC ISS switcher, because the HDFury is not designed to send the output signal over long lengths of cable. I happen to have a spare one if you need to buy one.

Option II.b
Pre-requisites
1 - Your projector has a component input

blu-ray player -> HDMI cable -> HDFury (set to output component) -> VGA breakout cable -> line driver -> 5 BNC cable -> BNC to RCA adapters -> component input on projector

Option III
Use a HDMI to coax balun.
You'll need to get power to the balun at the projector.

blu-ray player -> HDMI cable -> balun -> BNC cable (looks like only 1 is needed) -> balun -> HDMI cable -> projector

Here's a few links. The 1st are look to be the same product. The others are manufacturers that might have HDMI to coax baluns.

http://www.milestek.com/p-13559-hdmi-over-single-rg6-sdi-coax-extender-set.aspx?utm_source=google&utm_medium=cpc&utm_campaign=extenders&utm_term=%20HDMI%20to%20%20coax%20%20balun&utm_content=text&
Looks to be the same product for almost twice the money http://www.smarthome.com/79016/Calrad-40-1096-Remote-Controlled-Switchable-Dual-Input-HDMI-Balun-over-Coax/p.aspx
http://www.calrad.com/ calrad eletronics website
http://www.calradstore.com/40-1096.html info on the balun for the above websites
keydigital.com
gefen.com
extron.com
http://www.libertycable.com/
www.atlona.com

There maybe other options. Other websites (AVSforums, Home Theater Shack, etc.) would be good places to research.

**AnalogRocks** · Posted: Tue Jan 31, 2012 12:20 am Post subject:

Older Bluray player ( Sony BDP-550 eg )
Component cables------RTC2200-----RGBHV----Projector

No DVD scaling past 480p like this though.

dturco · Posted: Tue Jan 31, 2012 1:25 am Post subject:

During my brief stint installing sound and video equipment last year, many newer T.V. or projectors would not allow any thing to work if there were any kinds of converters in the mix. HDCP shut the stuff down.

dturco · Posted: Tue Jan 31, 2012 1:27 am Post subject:

Crap PAW covered it. We had to use those Baluns and special switch boxes to finally get the stuff to work. They were expensive from what I remember. Just like PAW pointed out.