Next PCB: Vector Deflection Board Interest thread - Amplifone Colour - Star wars etc

[dezbaz]

I intend to make Bare PCBs, as a few of mine are burnt around the main transistors (Normal with these)
A Green Amplifone Deflection Board arrived on my doorstep today. (phone call out of the blue)

Within 3 hours it was stripped to a bare PCB

Before


After



This will be a small run, so the costs may be reflective of that, not sure

If you need one (A BARE PCB) please let me know. The more we get the lower the cost etc

Modifications will be done to prevent usual problems.

I might add a plug or 2 because the 14 x wires break of easily


Please add your 20c if you have ideas

List so far
Me 2
Gibo 2
wonder1 2
daveb 1

Total 7

[wonder1]

me = 2

thanks Dez

[dezbaz]

Updated guys!


Just so you know, I have looked into the heatsink, and it seems to be not available in it's state.
Each person will probably need 1 x old original board for this project unless you know an aluminium extruder.

I read it is not a good idea to reduce the surface area of a heatsink, in fact to increase the heat dissipation of a heatsink by 50%, you need to increase the surface area by 400%.

I read this yesterday on the net here (Look under the pic that looks like a black comb)

---------- Post added at 05:45 PM ---------- Previous post was at 05:44 PM ----------

Some are for sale here
http://www.quarterarcade.com/Browse....=All.Parts.Mon

[dezbaz]

Making Progress here


Started compiling a parts list like the HV list

There are 75 resistors, a few more to add then comes the diodes

[dezbaz]

Whoa, a bit has happened and so thread is due for an update

I have fully converted the board to a Gerber file ready to be made, but it needs checking first

Improvements to the board have been made, readily available parts / alternatives have been sourced and tabled ready to make these from scratch. Or you may wish to use the PCB to simply rebuild yours.

Improvements
Board is now double sided, so all links will be removed
Two molex plugs have been added, so the wiring harness dis-connectable or soldered as before. This will do away with the problem of breaking wires
The option to get rid of the 2 x HUGE resistors (R7 and R29, 10W) in favour of TO-220 type (20W), to be added onto the heatsink
The piggy-backed height and width pots, now have spot on the board
The suggested diode modes (8 diodes) are incorporated onto the new board
Higher rated Deflection Transistors found and tested

Many other changes
Here's a sample

[dezbaz]

UPDATE:
Final checks have been done

Prototypes have been ordered

[Homepin]

Nice one again Dez - well done!

[furballx]

That is some seriously dedicated work Dez, well done.
Dave

[dezbaz]

Got some prototypes back yesterday



Some errors to fix, like green over some pads, which will get fixed before the main batch gets done

Some holes in the wrong spot, but I only made 3 protos, so no big deal

The improvements seem to have worked out fine

[dezbaz]

The newest Amp deflection on the Planet (proto assembled)






Testing next . . .