Super Jopix 2000.
Blanca
SUPERSTAR 1700, 3600, 3900 , Jopix 1000 , 2000 .
MODULATION: VR14 or cut R249
AM POWER: VR13
SSB POWER: VR12
POWER TWEAK:
1. Remove TR32
2. Replace R174 (10k) with a 1 K
3. Replace R187 (10k) with a 1 K
CLARIFIER:
1. Find the GREEN WIRE located at point 54 and UNSOLDER it.
2. Resolder this GREEN WIRE to POINT 14 (8.7 V) or to TR 41 collector.
3. Find the YELLOW WIRE on the clarifier control and UNSOLDER it. Insulate
the cut end. This wire is no longer used.
4. Find D75 (located near POINT 53 and VR15) and lift one end.
5. Find R135 (33k) and lift one end.
6. Double check all work for shorts.
NO EXPLOSION? Then you should be able to track on TX and RX!
CHANNELS:
1. Locate pins #12 and #13 on IC7 (MC14008BCP chip).
2. Using a SPST toggle switch, wire as follows:
Center of toggle switch goes to pin #13
The other goes to pin #12
Your channels should work with your band selector on "D" band.
It should be able to go from 28.300 Mhz. to 28.500 Mhz. ULATOR" ?
?? Here is what another reader wrote:
Super Star 3900 Gold and Cobra 148GTLX Gold
(These 2 radios are the same except for the name)
VR1 - AM/FM S METER ADJUST
VR2 - SSB/CW S METER ADJUST
VR3 - SSB SQUELCH RANGE
VR4 - AM SQUELCH RANGE
VR5 - FM DEVIATION ADJUST
VR7 - CARRIER BALANCE ADJUST
VR8 - RF METER ADJUST
VR10 - FINAL BIAS ADJUST
VR11 - DRIVER BIAS ADJUST
VR12 - ALC ADJUST
VR13 - AM POWER ADJUST
VR14 - AMC
VR16 - CW MON ADJUST
VR21 - Tx FREQUENCY ADJUST
TR32 - IS THE AMC LIMITER
"I don't recommend removing TR32 as it disables VR12 ALC, SSB power will be
at full blast.
Instead clip or remove R249. This only disables AMC not ALC.
Tune L40, L43, L44, and L33 for maximum forward swing on wattmeter.
Adjust AM power for no more than 5 watts dead-key - if running a linear amp
set at 3 watts dead-key.
Adjust ALC for no more than 20 - 25 watts PEP on SSB.
For Talkback remove D80."
SuperStar 3900
+ 10 KHz Jump Switch
1)Get a SPST switch and mount it in the radio.
2)Find IC 6 & 7 by the PLL chip. You will see J68 and J 69
3)Solder a wire from one side of the switch to J68.
4)Solder a wire from the other side of the switch to J69.
5)That's it .Flip the switch to jump up one channel.
Open Clarifier
1)Find D75 and R135 and cut one end of them.
2)On the back of the clarifier knob follow the green wire to the PC
board. Cut this wire from the PC board.
3)Now Solder this wire to a constant 8VDC source, like the
collector of TR41.
4)Take the yellow wire and cut it from the knob. Tape this wire it
is not needed.
4)This should make the radio TX/RX on the same frequency.
10 Meter Mod
1)Find IC7 ny the PLL chip.
2)Get a SPST switch and mount it in the radio.
3)Solder a wire from one side of the switch to Pin #13.
4)Solder a wire from the other side of the switch to Pin #12.
5)That's it .Put the radio on 'Band D' then flip the switch to jump
up to 28.300 to 28.500.
Tweak and peak
Audio Limiter - Cut R249
AM Power - VR13
SSB Power - VR12