with solder. Next, fold the strap over to position the
contact point. Wet the strap contact point with
solder, but do not solder the button yet. You want to
insure wetting on the strap first. You may need to
roughen the surface a bit.
When satisfied, quickly solder down the strap to
the button. Four hands can be a big
help! A length of tape along the strap
will hold it down. Figure 4A shows
the finished positive end of the
rebuilt pack, while Figure 4B shows
the negative end.
Measure the voltage from the
negative end to the band. It should
be 4.8V-5V depending on the charge
state. Gently fit the pack into the
The fit is certain to be tighter
than the OEM battery, but it should
fit fine. Position the cut in the band
away from the internal side contact.
Press and lock the cap into position.
Your THS700 model should
power-up and run for several hours,
so test out several charge/discharge
cycles. Remember, the internal
charger does not appear to be a
“fast” charger, so allow 10 hours or
more for a full charge. Figure 5
shows the new battery pack inserted
into the scope.
I haven’t tested the rebuilt
battery pack in a Tektronix external
charger. The batteries are not welded
together, and the external charger
applies no in-line pressure as does
Finally, if your pack seems stuck
in the THS700, extract by grabbing
the soldered strap with pliers.
So far, I have rebuilt two battery
packs and am very satisfied with the
3-4 hours of operational life between
February 2018 21
New for 2018 UPDATED Field Programmer
PICBASIC PRO™ Compiler
Order and details at:
Our new UPDATED Field Programmer has all the
features of our PC-based programmers and can
now be carried in the palm of your hand!
• Stand-alone programmer stores files on
• Draws power from the target board or from
USB power adapter.
Triggered HD 1080p Video Repeater
Noblack when triggered!
Multiple trigger options
Simple serial control
Team Kingsley LLC sales@TeamKingsley.com
Like the Sprite at facebook.com/Medea Wiz for a chance to win one!
MedeaWiz 79 $
Phone: (618) 797-9951
Special price! Special price!
We ship world-wide
Simple 1 byte serial control - Arduino, Pi, Picaxe, Propeller, Stamp, PLC
Video / Audio looping with a direct pushbutton / PIR trigger input
Serial port control of up to 200 files - With status feedback
FIGURE 5. Rebuilt battery pack in scope.