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The UAV Rev. D Video Upgrade Thread


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#776 xrbrevin OFFLINE  

xrbrevin

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Posted Sun Apr 15, 2018 1:08 PM

i would like to order a basic UAV board
please let me know the total cost including shipping to the UK
many thanks



#777 Ruggers Customs OFFLINE  

Ruggers Customs

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Posted Tue Apr 17, 2018 10:40 AM

Anyone seen Bryan?  Been trying to contact him for a couple of weeks with no response.  Just wondering if he's still alive? :)



#778 cypher007 OFFLINE  

cypher007

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Posted Wed Apr 18, 2018 4:14 AM

quick question. can I use a common ground (like the cable shield) for the outputs?

 

so I can use a 4 core cable to do the chroma luma comp vid and audio then the shield as gnd?



#779 randyg OFFLINE  

randyg

    Combat Commando

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Posted Wed Apr 18, 2018 2:33 PM

apologies for being so late to the group...is this still available to purchase?

thank you 

 



#780 manterola OFFLINE  

manterola

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Posted Thu Apr 19, 2018 7:49 AM

Hi guys,
After many weeks yesterday I had the opportunity to give UAV rev.D another try. This time I connected the UAV composite output and ground directly to the video cable skipping the Atari PCB and din connections. I did that because I thought the Din connector I installed in my 600xl could have been not completely isolated.
It didn't work, I mean it worked for about one minute, then the same problem (check the video). If you turn the system off for about 30 seconds, and then turn it on again, the image looks great for about 10 or 5 seconds (just like the video).
Given this working "durations" it makes sense that there is something (a capacitor maybe) charging and discharging which is producing the problem. The output of the modulator is particularly noisy, I just mention this in case you think it may affect.
I already tried to supply power directly thru the designated pads without luck.
Bryan offer to send it back, but I want to know if you have ideas to give it a last try.
Thanks


#781 ckrtech OFFLINE  

ckrtech

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Posted Thu Apr 19, 2018 5:05 PM

Despite the timing of it not working, are you sure your sync signal is soldered well?

 

Also - what happens if you remove chroma from the equation? Even if you don't use s-video, you could move your wire from composite video out to luma out and see if you get a nice black and white signal.



#782 manterola OFFLINE  

manterola

    Star Raider

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Posted Mon Apr 23, 2018 8:13 AM

Despite the timing of it not working, are you sure your sync signal is soldered well?
 
Also - what happens if you remove chroma from the equation? Even if you don't use s-video, you could move your wire from composite video out to luma out and see if you get a nice black and white signal.

I checked the sync signal from UAV to gtia and I am sure there is no problem there. I also tried your suggestion of feeding lumma to the composite, and also tried the same but also disconnecting the color-in signal to UAV. Still the same.
I still have to ideas to try: first one is to try UAV in other Atari computer. I don't have a socketed one, so I was thinking in holding UAV piggyback on top of the cd4050, just for few minutes to see if my noisy ground 600xl is the reason of the problem.
The other idea is a check a suspicious smt resistor that I might have moved while soldering the outputs.

Can someone send me a picture of the resistors that are close to the outputs side of the UAV rev D? The underneath side of the PCB.
It is the opposite side of the green terminal block, but close to it.
I want to compare and see if there is something fishy there...
Thank you so much,
M

Edited by manterola, Mon Apr 23, 2018 8:15 AM.


#783 Bryan OFFLINE  

Bryan

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Posted Wed May 2, 2018 12:33 PM

Hi everyone.

 

I've been pulled away from my Atari projects for a little bit, so I've ordered a small run of UAV Rev D boards to keep them available until I have more time.

 

The available options are currently:

Basic $22

Plug-In $25

Kit $25

XEL $25

5200 low-profile build $25

 

I'm getting caught up with PMs as well so let me know if I've forgotten anyone.



#784 OldAtAtari OFFLINE  

OldAtAtari

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Posted Wed May 16, 2018 6:41 AM

Bryan, I've PM'd you. Thank you!






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