NBTV Television Analyst

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Re: NBTV Television Analyst

Postby Harry Dalek » Thu May 21, 2020 11:29 am

I am using the opto coupler circuit with out the 4066 for now..shown below with another club circuit for later on adding sync to the video signal , but i will replace that with the video inverter for this monitor .
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Last edited by Harry Dalek on Thu May 21, 2020 2:04 pm, edited 1 time in total.
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
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Harry Dalek
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Re: NBTV Television Analyst

Postby Harry Dalek » Thu May 21, 2020 2:01 pm

Ok the inverted video is sorted Thanks Steve Klaas your circuits keep on giving .
I will have a look next here at the negative supply for the PMT i will end up having 3 tubes working off this same HV supply here .

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The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
User avatar
Harry Dalek
"Fester! Don't do that to 'Thing'"
 
Posts: 4313
Joined: Fri Sep 26, 2008 4:58 pm
Location: Australia

Re: NBTV Television Analyst

Postby Harry Dalek » Sun May 24, 2020 10:05 pm

Well i was hoping to get this PMT to work by now but 2 days of testing i found it is light sensitive to a point but when i did a light transmitting test in its light proof chamber i found instead of a nice waveform all i was getting was spikes no matter the voltage to the PMT or transmitting level .
I was trying a test similar to here below same 3 colour light transmitter

I was using as in the tests One of Steves reversing bars

viewtopic.php?f=31&t=2403

I think i have picked another dud PMT :roll: ,i do have one handy that's is fine which i used before as a last resort but i still have another 2 PMTs to try before that stage .

So looks like the next one to hook up and see is the one i was going to pick the first time around The Hamamatsu R1282 has a wide Colour working range .

I will try again this week every thing is done just need the PMT to cooperate.
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The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
User avatar
Harry Dalek
"Fester! Don't do that to 'Thing'"
 
Posts: 4313
Joined: Fri Sep 26, 2008 4:58 pm
Location: Australia

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