Vivitar 2800 Flash Modification - variable power output : 無料・フリー素材/写真
Vivitar 2800 Flash Modification - variable power output / ukespresso
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Variable power output modifications for Vivitar 2800 thyristor flash.Part Two:6. The disassembled flash unit is shown in "ONE", together will the newly soldered cable to the photo diode. You will need to use thin wire, no thicker than the existing wire in the flash. I replaced the white cable shown with thinner wire at a later stage.7. Gently pull out the bottom PCB as far as you can.8. Solder a cable to left and right connections of the photo diode as shown in "TWO". These wires should be about 15cm in length- they need to be long enough to feed up the side of the flash as indicated by the red dotted line in "ONE".9. The other side of this PCB is shown in THREE.10. Now comes the messy part. Using a soldering iron or the tool of your choice, make a ) shaped hole in the top side of the upper flash unit. The outer part is shown in photo "FOUR"- you will need to make a similar hole in the inner part (not shown). This hole needs to be long enough to allow the cables to move freely when the upper part of the flash is angled when using the flash.(The following part may be amended later).11. Feed the newly soldered wires alongside the existing wires, feeding it through the holes in the PCBs and refit the lower PCB.12. Feed the wires through the new hole in the upper inner part of the flash head and reassemble the flash unit.13. Take a 100k miniature potentiometer (mine is linear; I may try a log one later; a 250k potentiometer may be better but I don't have one) and snip off the prongs.14. Solder the new wires to the centre and right terminals of the potentiometer (the underside of the potentiometer).15. Push the wires back into the flash head and glue the potentiometer to the centre of the part shown in photo "FOUR". 16. Dtrill a 6mm hole in the centre of a cap that fits over the circular moulding shown in photo FOUR (I used the lid from a milk carton- the red cap shown in the other photo). Push it over the spindle of the potentiometer (cut the spindle to length prior to soldering the wires to it) and tighten up the washer/ nut.17. Attach a knob to the spindle.18. Test it. You have a 50% chance of turning the knob clockwise will increase the power output. If it reduces the power output, unsolder and reverse the wires on the back of the potentiometer (you did leave enough slack to do this didn't you?).I think that covers it- please correct me if I've made a mistake, missed out a step or if it's unclear (I need to upload a missing photo). I will also be trying out a smaller sub-miniature potentiometer at a later date.Total cost of this flash and mod was £4.85:Flash: £3.21 (fleabay)Knob: 94pPotentiometer: 70pPlastic cap and wire: free.If you want to check the trigger voltage see: forums.steves-digicams.com/flash-external/84981-trigger-v... |
| 撮影日 | 2008-06-06 00:05:25 |
| 撮影者 | ukespresso , Worcester, England |
| タグ | |
| 撮影地 |