Steve Anderson wrote:Interesting find. Did it have any guts when you found it? It appears to be an abandoned project of some description, I wonder what it originally was or what was planned for it?
Sorry Steve i didn't explain the case its in at all.
The idea of it is Your Brute think you were planning a scope and monitor in the same unit so that idea .
The rest is my idea to do some thing similar since i now have a fair few 3bp1's they seemed to me to be good for this size case ,the case is a old VCR recorder dual dvd player that's where the guts have gone !
I have turned the case around partly mounted the 2 CRT's so the case is back the front for a VCR ! and painted ...stereo model so lots of predrilled holes to fill with future pots .
You should be able to adapt previous circuits to suit these CRTs, I'll look up the datasheets for these tubes just to make sure there are no surprises waiting.
Yes for sure i am for sure using the Anderson 3bp1 CRT circuit....for both the scope and monitor this would be an easy fix to power the scope CRT .
The power supply i am checking the Transformer today what i exactly have before i work out the power supply i am using an old scope transformer or hope to so not even bothering to mount it till i know there no magnetic field problem ......or i can use the little mu metal i have fix any problem here .
And as with your Brute if it does not work out just use the cable to the other monitors AC power box supply .
The good news is as the CRTs are the same type there'll be a great deal of commonality in the power supply and deflection circuits. So not as complex as two separate displays/monitors.
Arrr yes reason i also choose 2 3bp1's and not another type same power supply so much easier !
Interesting how the front of the CRTs are mounted, they appear to be PC fan housings with the motor and blades removed, clever idea!
Steve A.
Well it was my idea i have used a bit notice the the big fan housing i used on the SSTV behind they fit the CRT's like a glove ! all you have to worry about is mounting the back infact smaller fans fit the tube here as well...i am thinking about that part as i might use them on the small CRTs face in future instead...so yes thinking about a neat mount for back of the tubes .
Just looked up datasheets, no surprises, all very standard for a CRT of this era.
I think the 3Bp1's i have vary who made them similar is good but i could match with what i got once i have a good look
It seems the rear of the CRTs have no mechanical support, they're just relying on the front mounting, I would spend some thinking about changing that.
No just mentioned working on that ,i want to do it neater so no rush my main thing was mounting the tubes front yesterday ...i don't enjoy cutting out holes and the case part really ,and not easy to get a case these days so repurpose i say !
So VCR's come in handy case wise as well !...I am going to check the transformer today ,and i need to get a few 75 v 5.1v Zeners this week .
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.