#166
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Tom-BLOWN AWAY by yr work....Good Job !
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Benevolent Despot |
#167
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URL Test 4
[IMG][/IMG]
Phil.....Putting [IMG] [/IMG] around http://pic70.picturetrail.com:80/VOL.../322339657.jpg produced same size picture. I'm going to try it next with PhotoBucket. Last edited by Tomcomm; 04-05-2011 at 11:08 AM. |
#168
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ULR Test 5
Phil....The [IMG].............[/IMG] seems to work with Photobucket freebi ok! Its slightly larger than my 1024 X 768 monitor but has positioning sliders to cover entire native pic size. Hey, when I get into posting RAW camera screenshots this is what its going to be.............Tom Last edited by Tomcomm; 04-05-2011 at 11:42 AM. |
#169
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Do you have vid in mod ?
Can someone link to RCA Video In adapter schematic again please ? |
#170
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that looks great!convergence looks very good and the color is fantastic.beautiful picture and thanks for pic
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Audiokarma |
#171
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Ext Video Input
Newvista...........Here's a tube version of the RCA external input driver for the Roundies I got from Pete D. Hope you can use it..........Tom
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#172
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Thanks for that diagram, Tom (and Pete). An "Official RCA" video input mod!
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Chris Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did." |
#173
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Here's the complete article, which I got from John Folsom.
http://antiqueradio.org/art/BROADCAST_NEWS_0656_1.jpg http://antiqueradio.org/art/BROADCAST_NEWS_0656_2.jpg http://antiqueradio.org/art/BROADCAST_NEWS_0656_3.jpg http://antiqueradio.org/art/BROADCAST_NEWS_0656_4.jpg I built one last year. Phil Nelson http://antiqueradio.org/index.html |
#174
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Quote:
Thanks to you and others who posted details of this RCA Vid Input, I like the DC restoration & peaking coils.Will try building this one. Meanwhile I adapted another from the net to my CTC-5 that has a tuner problem (details on a separate post) |
#175
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External Video Input
Since my 21CT55 is not an original RCA restoration but a "laboratory test-bed", I saw no reason to copy RCA's external video input circuitry using early '50s technology. Instead, I implemented a solid-state video op-amp that provides a "perfect" DVD quality 480 line resolution, 75ohm , 5vpp signal into the 55's 1st video amp grid. It also supplies the same 75ohm video at 1vpp to my two comb-filtered Sony monitors and a Leader waveform monitor. Two external video sources can be selected with a toggle switch, each with individual level and offset controls. Presently I run a DVD player with the DVE test disk into one input and a second DVD player with program disks or OTA HD converter into the second input. Now that the 21CT55 's PQ is at least as good as it was before the tragic FBX meltdown I intend to resume my implementation of 480 line component video processing in addition to the present 280 line composite processing, hopefully.......Tom
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Audiokarma |
#176
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Quote:
Pete |
#177
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Quote:
I've built a few video adaptors for various color sets but all mine have been using basic transistors. While they work well, they are certainly not as elegant as one using an IC. Would you share your IC adaptor schematic with the list? Regards, Cliff Last edited by cbenham; 04-17-2011 at 05:36 PM. |
#178
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IC Video Input
I use a Signetics NE5539 video op amp. It drives the 1st video amp grid with at least 3vpp and also the video monitors I use for all PQ comparisons.
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#179
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You should replace those wax caps!
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#180
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Quote:
Regards, Cliff |
Audiokarma |
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