Philips FM92E Manual page 39

Coil # 2:
This is RF amplifier input coil.
Move coil slug to center of coil.
Remove by unsoldering amplifier input wire [wire on rear PCB near chip capacitor].
Remove wire going to ground at top of coil former.
Gently remove former from housing.
Pry off bottom 1 cm of wire & remove enamel from that 1cm of wire.
Cut enamelled wire [0.125mm] to 250mm length & remove enamel from that 1cm from one end of wire.
Solder two pieces of wire.
Wind additional 12 turns of wire onto coil former, in same direction as other wire.
When 12 turns completed, hold down wire with glue from hot glue gun.
Cut wire at the 12 turn mark. [just added]
Or; strip all wire & wind on 54 turns turns. Earth bottom of coil. With tap 2 turns from earth.
Cut down spacer between coil 1 & 2 to height of approximately 2mm. Then grind down sharp edges.
Coil # 3:
This is RF amplifier output coil.
Move coil slug to center of coil.
Remove by unsoldering amplifier input wire [wire on rear PCB near chip capacitor].
Remove wire going to ground at top of coil former.
Gently remove former from housing.
Pry off bottom 1 cm of wire & remove enamel from that 1cm of wire.
Cut enamelled wire [0.125mm] to 250mm length & remove enamel from that 1cm from one end of wire.
Solder two pieces of wire.
Wind additional 12 turns of wire onto coil former, in same direction as other wire. Total of 54 turns.
When 12 turns completed, hold down wire with glue from hot glue gun.
Cut wire at the 12 turn mark. [just added]
Or; strip all wire & wind on 54 turns. Earth bottom of coil. With tap 2 turns from earth.
Coil # 4:
st
This is RF amplifier 1 output bandpass coil.
Move coil slug to center of coil.
Remove wire going to ground at top of coil former.
Gently remove former from housing.
Pry off bottom 1 cm of wire & remove enamel from that 1cm of wire.
Cut enamelled wire [0.125mm] to 250mm length & remove enamel from that 1cm from one end of wire.
Solder two pieces of wire.
Wind additional 11 turns of wire onto coil former, in same direction as other wire. Total of 53 turns.
When 11 turns completed, hold down wire with glue from hot glue gun.
Cut wire at the 11 turn mark. [just added]
Or; strip all wire & wind on 53 turns. Earth bottom of coil.
Coil # 5
nd
This is RF amplifier output 2 bandpass coil.
Move coil slug to center of coil.
Remove wire going to ground at top of coil former.
Gently remove former from housing.
Pry off bottom 1 cm of wire & remove enamel from that 1cm of wire.
Cut enamelled wire [0.125mm] to 250mm length & remove enamel from that 1cm from one end of wire.
Solder two pieces of wire.
Wind additional 11 turns of wire onto coil former, in same direction as other wire. Total of 53 turns.
When 11 turns completed, hold down wire with glue from hot glue gun.
Cut wire at the 11 turn mark. [just added]
Or; strip all wire & wind on 53 turns. Earth bottom of coil.
Philips FM92E Conversion to 6 Meters: Version 3.9 Page 39