Help needed - RT Russell test card generator 1980

[g8gtz]

We have received the following request for help - we will send the link to this topic so please reply here:

FIRST OF ALL , I HAVE TO CONGRATULATE YOU FOR THE EXCELLENT MAGAZINE. I AM WRITING TO YOU (FROM GREECE) ABOUT A PROBLEM THAT I HAVE WITH MY TEST CARD. LAST MONTH I DECIDE TO BUILD THIS TEST CARD (THE OLD ONE - R.T RUSSEL 1980).

I DID NOT ENCOUNTER SERIOUS PROBLEM WITH THE 40MHz OSCILLATOR, BECAUSE I REPLACED IT WITH A CRYSTAL ONE, SO THE BOARD 1 I SUPPOSE THAT WORK CORRECTLY (THE CIRCLE IS OK ). I ALSO BUILT THE SECOND BOARD (THE CROSSHATCH IS PRESENT AND THE MULTIBURST ALSO).

THE PROBLEM HERE IS, THAT I DO NOT KNOW WHAT KIND OF SIGNALS ARE TC1 AND TC2. FINALLY I BUILT THE LAST ONE BOARD (THE THIRD). HERE I HAVE SOME PROBLEMS. FIRST OF ALL I DO NOT HAVE GREY SCALE, AND IN THE FOND THERE IS NOT THE CROSSHATCH SIGNAL (I HAVE ATTACHED TWO FOTOS)

PLEASE, HELP ME IN ORDER TO COMPLETE THIS TEST CARD.
I HAVE TO THANK YOU VERY MUCH FOR YOUR TIME

BEST REGARDS

ELEFTHERIOS KOUZAKIOTIS

testcard.jpg (84.8 KiB) Viewed 3598 times

[G4HTZ]

Presume he has the manual ...if not its here
http://www.cix.co.uk/~rrussell/tccgen/manual/index.html

[G8GKQ]

Hi Eleftherious

I take it that you're talking about the 3 board TTL Test Card Generator described in the BATC ATV Handbook.

Please e-mail me directly dave.g8gkq<at>gmail.com. I have one running in the shack, and can compare waveforms for you.

Dave
G8GKQ