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High Power variable voltage mod for C7042 APB

91107 Views 306 Replies 59 Participants Last post by  Gavin84
How would you like SH type power, the ability to adjust voltage all for next to nothing? Yes? Well read on!

You need
Craft knife
Soldering iron
solder sucker
2x R010 resistors

Difficulty level 2/10 easy enough for teenagers or adults.

Stage one, remove power connector, bend up a leg and refit.

Use solder sucker to remove solder.

Be careful there is a small track on the connector side. If it breaks just use a wire to link from the diode to the side leg.
Prise connector up when all solder has gone

bend up the end leg

Solder back onto board with remaing two legs and solder a thick wire to the bent up leg. Feed wire through 5 volt regulator hole as shown

Stage 2, cut track and solder wire to it
flip board over and with the craft knife cut through the large track shown, cut back and forth until it is cleanly cut. Check with a meter if you have one

Scrape off some of the green stuff and tin the track with some solder. Now solder the wire to the track

Stage 3, add two resistors to double the current trip point
Identify the two resistors R010 in the centre of this photo. Add extra solder either end as shown.

Now solder your new R010 resistors (size 2512) directly on top.

Use a standard C7024 power supply for the untouched connector (this powers the computer)
Use a 0-15V 20-30 Amp power supply for the modified connector (this goes to the power section)

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1 - 4 of 307 Posts
Numpty question time: Drum roll please.

Does this mod prevent dual lane analogue running??

Thanks for your continuing efforts, it really is much appreciated by us rank and file racers. Cheers ;o)
That took me back! I have stood in the room where they make these - I'm an ex-Vishay employee (have to be carefull, saying that is the equivalent of "Voldermort" in my current employers!).

+2 for the post off and pay brigade! I'd be happy apart from soldering the new wire to the track.
hahaha, sure can. Retail PLUS 10% for me!!!
Try spelling Boventry with the letter "k".
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