Schematics

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Re: Schematics

Postby Harry Dalek » Sat Jun 10, 2017 7:26 pm

FIrst up before i post schematics used
Parst i used
Transistors BC547B NpN
BC557B PNP.....both same as in schematic
ZTX558 PNP
ZTX458 NPN

opto coupler.....NEC ps2561

Ic's
Shown HEF4538..........i used MC14538CP
HEf4066...........i used MC74HC4066N
TL072 TL082......i used TL082P
LM311.............i used LM311P
CA3140.............i used CA3140E
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
"Fester! Don't do that to 'Thing'"
 
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Re: Schematics

Postby Harry Dalek » Sat Jun 10, 2017 7:54 pm

Schematics used...
Changes I left in the 1,5ohm 2W reistor in the heater seems to be working fine as is

ON low voltage supply if i had them i would of used dual 12 volt regulators instead of the Zener idea but it works fine for the negative supply i just need to replace the positive supply zener and resistors with a 12 volt regulator .
Edit ...i ended up using a lm317 regulator for the 12 volt supply works left negative supply via the zener and resistors

ON the 24 volt Zener i used 2 12 volt Zeners in series for same result .

On the sawtooth generator circuit you need to put in a 180ohm resistor Frame sync in at 6E or it will stop the framing saw tooth circuit working .

Another edit here VR401 and VR501 have a 10K resistors between outputs from the Tl082 those trimmer inputs to reduce sawtooth deflection levels .

Well this is pretty much what i used and every thing i can remember that was changed ,on resistor the odd one or 2 i made up correct values with some resistors in series .

If you want to add any advice in posts feel free
I would look at the 3bp1 build on mistakes i made ....biggest one don't forget to ground earth the thing !
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VCR139A NBTV Initial 1-Model.gif
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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: 4621
Joined: Fri Sep 26, 2008 4:58 pm
Location: Australia


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