Philips FM92E, Manual

Page: 43 / 86

Coil # 1
•
Cut a 160mm length of 0.8mm enamel coated wire.
•
Clean off all enamel from two ends of wire, one end of 5mm in length to be cleaned, the other earth end
10mm to be cleaned.
•
Solder both ends of 0.8mm wire.
•
Bend 8mm of the 0.8mm wire at [10mm tinned end] at right angles.
•
Cut 33 mm length from the original wire; Remove 5mm of enamel from both ends of the original wire;
Tin both ends of the original wire; Solder one end of the original wire to the 0.8mm wire at earth end;
See picture above labelled “Winding Wire”.
•
Push one end of the bent 0.8mm wire through a left hand hole of the square end of the coil former [for
earth connection]; Leave a short section [approximately 2-3mm] of the 10mm tinned section on the
winding side of the former. Wind tightly, 7 turns of 0.8mm of wire [160mm] onto former.
•
With the 33mm of the original wire, which has been soldered to the earth end of the 0.8mm wire; Wind
1.5 turns of from earth connection in same direction as 0.8mm wire; solder other end of the original wire
to the antenna input.
•
Solder a 33pf capacitor across the 7 turns of 0.8mm wire. Capacitor goes under coil [via left].
•
If you are conducting this conversion remote to the club, then check with GDO that the coil resonates at
50.00 Mhz. Adjust the ferrite in the coil to go to that frequency. [look at note below, if this point is
applicable]
•
Place coil back into coil #1 position in module.
•
Solder 0.8mm earth wire to module & solder original wire [33mm] to antenna connection . [see solder
points on page 28]
•
If you are conducting this conversion remote to the club, then check with GDO that the coil resonates at
53.25 Mhz. Adjust the ferrite in the coil to go to that frequency. [look at note below, if this point is
applicable]
Philips FM92E Conversion to 6 Meters: Version 3.9 Page
43