View Full Version : RGBHV over shielded Cat 5 success!


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dpmiller15
07-19-07, 05:40 PM
Joined up just to offer a word of thanks- made up a couple of 15way-to-rj45 adaptors, and am typing this @ 1280x1024 over a 15m coil of UTP, with only one conspicuous ghost and a slight gamma shift (white is white, grey is pink-ish)

Result!

I did make a point of twisting the pairs inside the adaptor, BTW. I'll be running a slightly shorter cable in STP to connect the PC to an LCD in a different room, so I should be good to go.

Cheers

david

dpmiller15
07-20-07, 04:33 PM
Additional, and this might be worth others looking at:

I pulled the foiled STP into position today, run totals 8m.

The LCD tv in question has an external PSU so is basically ungrounded.

Here's the interesting thing- foil shield NOT connected to VGA chassis at either end, and the ghost image (my desktop is black for handiness) is much lighter than the desktop. Ground the shield at both ends. and the ghost becomes a darker "shadow".

So, I got to thinking that this was an impedance-related issue. I've broken the screen connection at each end and inserted a 56ohm resistor; the result is a much-diminished ghost.

Make sense to anyone? My AC theory is a tad rusty to say the least...

bemaitea2
07-27-07, 06:33 PM
Well, I've been somewhat successful with this custom cable.

Never soldered anything in my life, so it took many many hours to get the technique down (and about 2 HD-15 outputs).

I've made the cable with components on one end and VGA on the other. Pins I solder were 1-3, 6-8, 13 &14.

On the phono end for the compoents, I soldered o/ow, g/gw, bl/blw and just bent back br/brw and taped to etherent cable on the outside.

My cable is not the shielded kind if I'm correct because it does not have the metal shielding and uncovered wire on the inside.

But here's the thing. I was able to get both my Blue and Red signals to get through but my green one will not work. the picture is perfectly sharp and beautiful, but it seems to me that the green channel is not working.

Picture is purupleish.

Any ideas or should I just spring for a prebuilt one from Amazon for $16?

Thanks

DuncanSWardle
08-21-07, 06:08 AM
Hi - after some help

Bowled over by the amount of info here and hope someone can hold my hand in getting things working

I wish to connect my SkyHD component out which is downstairs to my AV gear upstairs

Now I have a 15 Meter Shielded Cat5E network cable and I have spare component cables around the place

What to I need to do to the component cable to transmit the video over it?
Is there a step by step picture guide available anyplace?

Also how would I get the audio from the Sky box along the cable ? Is there anyway of getting the optical out signal down the network cable as well ?

Sorry for sounding dense, just need a guiding hand

Thanks

Duncan

DuncanSWardle
08-22-07, 06:43 AM
Anyone able to help ?

JackLT
08-22-07, 09:11 PM
Since 2001! This must be the longest time running thread on AVS or anywhere else...

shodoug
08-22-07, 11:33 PM
Most of the people who have participated in this thread have had their fill of the subject, so don't be too surprised if replies don't come pouring in. I admit that I have tried to unsubscribe from this thread many times over the years. :) Now, I am glad I am still on it, just to see it go on. :)

Anyway, to prime the pump...

What type of connectors are available on both devices? Are there just RCA type plugs, or are there also video connections for a computer monitor that can handle component signals?

I am pretty sure the thread here mainly dealt putting 9 or 15 pin connectors onto the ends of the cat5 cable.

I would guess that you could also solder the ends of the cat 5 conductors to the RCA cables, but I am not sure how well that would work...

If you want to use the cat 5, and you have RCA type connections on your equipment, you can go to the connectors that people used here, and then a cable that can break the signals out to the RCA devices ( some computer video cables have BNC connectors on one end, and then you could get RCA adapters...), but every time you put in a connection, you risk having problems, especially with the inherent impedance mismatches.

You might just want to try going straight from the cat 5 to a coax that is attached to rca plugs. Not sure it would work, but the fact that RGBHV worked over cat 5 surprised a few people. Maybe you can get some RCA plugs from Radio Shack and just attach the cat5 conductors directly to the plugs? Might be worth a try?

Good luck,
Doug



I wish to connect my SkyHD component out which is downstairs to my AV gear upstairs

Now I have a 15 Meter Shielded Cat5E network cable and I have spare component cables around the place

What to I need to do to the component cable to transmit the video over it?
Is there a step by step picture guide available anyplace?

Also how would I get the audio from the Sky box along the cable ? Is there anyway of getting the optical out signal down the network cable as well ?

Sorry for sounding dense, just need a guiding hand

Thanks

Duncan

gireesh
10-02-07, 11:33 PM
This thread is like an old friend that pops up every once in awhile. I was still tweaking my G11 with VGA inputs when this was first posted 5 and 1/2 years ago. In that time it's been viewed over 150,000 times. You have to hand it to Wiggles for creating one of the first timeless posts in AVS history.

This is the fourth house and the third city that I am living in since I first posted on this thread... this sure reminds me of old friends too... interestingly enough, I brought up DVI question in 2001 :D

MrWigggles
10-04-07, 01:14 PM
Since 2001! This must be the longest time running thread on AVS or anywhere else...
The only longer running threads on this forum are the "Denver HDTV..." and I believe "Boston HDTV ..." threads, but those threads are kind of like stickies - they are designed to be permanent and are indexed by a sticky thread.

Some other site must be linking this thread, because it gets necromanced every 3 months. The funny thing is it is only 9 pages long the others mentioned are over a hundred. (and now half the posts are about how old this thread is.)

-Mr. Wigggles

Blaney
11-01-07, 11:19 PM
I Cant believe this thread still exists!! I came back to verify some of my connections I had made and check how I originally set up my makeshift patch panel. I figured I would have to search long and hard to find the thread...but a quick search, and on page 4, there it was...amazing....after upgrading several components, I am still using much of this setup with great results! Thanks everyone for keeping this alive.

zippo2008
01-15-08, 03:24 PM
would this sort of thing also work with a piece of CAT5 and 2 RGB ends ?

I would like to have a computer in one area of a room and my computer monitor in the other, but don't want to drill large holes in the floor and run the wire under the room floor.....

so instead, I'd drill small holes at each end of the room, run CAT5 wire down one of the holes, along my basement ceiling ( it has a false ceiling ) , pull the end of the wire up through the hole at the other end and then now attach the RGB plugs or whatever they are called.

I got the idea from a buddy who sent me this link here:
http://myhometheater.homestead.com/vgacable.html

I don't see VGA to VGA connections here, but it seems do-able, but I'm not sure.

Any help would be appreciated.

halljb
01-15-08, 03:59 PM
I built VGA-VGA cables using this method. One about 15' and the other about 40'. It worked just as you describe. Fish small cables through the holes, and put the vga ends on. I have some slight ghosting, but that seemed to change depending on the quality of my attempts at soldering, so I would blame my skills ;)

satyanjoy
02-27-08, 12:37 PM
Is it possible to make it reverse??I want the take input from the component cable of my ps2 to my VGA monitor

halljb
02-27-08, 12:40 PM
Is it possible to make it reverse??I want the take input from the component cable of my ps2 to my VGA monitor

No, unless your monitor will accept a component signal over the vga port like some projectors do. Otherwise you will need a transcoder. It is more than a cabling issue.

Sokonomi
04-19-08, 09:41 PM
Im trying to move my noicy server out of the bedroom, and came across this topic while looking for VGA cable extentions. ;)

I need to get a good 1680x1050rez. 32bit 60Hz (Its a TFT screen) VGA feed across a distance of around 30 to 40ft. capable of running video and text, pertymuch like a normal PC would be able to do.

What would you advice me to do to achieve this?

K-Dawg
04-22-08, 02:36 PM
This is the condensed version of this thread (MrWiggles FTW) so you dont have to comb through the whole thread.

link http://myhometheater.homestead.com/vgacable.html

Do note however that this link doesnt include the instructions for clearing up ghosting issues. You may need to come back should you encounter that issue.

Mesrias
05-14-08, 02:52 PM
Hi from Romania (East europe)
I confirm this GUIDE works 100%
I successfully connect VGA out from a NX6325 HP Laptop with a PLASMA TV LG 32PC51.
Please find on the internet details for this models to see other informations and what connectors have each equipment.
I put on both ends same pin out on two HD15 father connectors.

Bucuresti, bucharest, SVGA, CAT5e, build, cabluri, laptop, conectare, TV, VGA, RGB, romania

Later edit: I forgot to tell that coverd distance was approximatively 13m of UTP CAT5e cable put it along with stereo SOUND cable, and few power cords and Network cables.

Mark Petersen
05-14-08, 03:28 PM
I think this thread deserves a hall of fame award for the longest running thread in AVS history. 7 years and running and people are still finding it helpful and useful. Well done Mr. Wiggles :)

Ninjahedge
08-13-08, 03:31 PM
I will have to read the last few years on this, but I have to ask anyway.

1st, does RadioShack still offer the needed peices parts for this? If not, is there a good online site to get the shielded cable, shrink ends and other pieces?

2nd, what solder (%/%) do you recommend for this? It has been a LONG time since I have done this!

3rd, is there any way to make a manual (or better yet, automatic) switch for this setup? I have a computer and an XBox360 that I would like to connect up to the same VGA port on my plasma. I have a KVM for it, but the model is irritating in that you have to have the primary machine on to be able to select the input source being used (IOW, both need to be on in order to operate one of them, in my case, the computer needs to be on when I am using the X-Box, but not vice versa).

Bottom line is, with a new av/wall unit installed (wood veneer) I would like to avoid coring as much as possible. If I could just get a large drill bit in there to fit the CAT5 and speaker wires for the R, SW, RL and RR I will be good to go!

TIA!

Impressthemall
11-17-08, 08:14 PM
MR WIGGGLES,

I'm really impressed by all this, (if the quality and stability is really that good).

May I ask you, as I do not have any soldering equipment or knowledge, would you consider making me a really good example of a VGA to RGB cable, for a fee?

I am trying to connect my Apple Mac Mini with DVI out, to my analogue panasonic widescreen with only svideo and rgb in. I would like to avoid going down the S-video or VGA route if I can get RGB quality.

Would you let me know?

Thank you in advance for any help you can give.

tlastrange
11-17-08, 10:03 PM
I think this thread deserves a hall of fame award for the longest running thread in AVS history. 7 years and running and people are still finding it helpful and useful. Well done Mr. Wiggles :)

I agree! I venture back to avsforum every couple years when the upgrade bug strikes and when I saw this thread tonight it threw me for a loop. Next up... the NEC LT150 and "The Dell Deal."

Rysler
03-20-10, 11:56 AM
Hello:

Before trying this idea I used a normal VGA cable and the quality of the video was really bad!

Then I made the cable as explained on this thread and it worked with a slight modification. I have the following config:

1) Samsung LCD TV 1080i
2) Dell INSPIRON 15 laptop
3) Resolution = 1360x768 @60Hz
4) Cable lenght: 15meters

Now the modification was:

I connected pin 10(GND) of the DB15 to the CAT5 shielding but also connected it to the case of the DB15 connector, I guess this helped to have a better impedance match on the transmission lines.

Before soldering a small cable between pin 10 and the case there was a lot of ghosting on the screen! But after doing this small mod it worked almost perfect. There is still a slight ghosting but only visible when you're too near the screen(which is not my case).

Thanks a lot to Mr. Wigggles!

Saludos desde Mexico!!!

Desmo888
09-15-10, 08:29 AM
Thanks for the thread, it has helped me tremendously!