Jopix SS3900 EU V10

Jopix SS3900 EU V10

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Publié le 03 mai 2018
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J opix S S -3900-E U-V 10 Mod kit © F or Non C ommercial Uses Only Date: 10-04-2018 R ev is ion 1.00 R P C omms & Design UK © December 2018 Draft 1.0
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Dis c laimer-It is assumed your have the technical ability & tec hnical skills, correct calibrated T est\R F equipment and tools to carry out these modification and comply with all legal radio bodies and local laws enforced in y our country of operation. R P C omms & Design UK will not be held responsible for any legal losses, life, equipment property or any other responsibilities in information provided to end user, use of information is for educational purposes, please seek legal and technical advice is subject to commercial and manufacturing uses. T he end user of this information is solely responsible for his or her actions in use of this material and to ensure he\she abide by any R adio local or country laws and any other legal duties enforced in your country of operation. All information presented is the sole property of R P C omms & Design UK and shall not be copied, altered in whole or part, without permis sion. Any other parties’information mentioned in this ma nual shall be credited and abide by any or copyrights enforced. P leas e c ontac trpc omms @ g mail.c omA ny w eb-links s upplied on this doc ument c opyrig hts w ill apply to res pec tiv e ow ners and us ed in g ood faith.
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Introduc tion T his Document written will help improve some of the shortcomings of the R anger J opix S S -3900-E U 11metre band Multi-mode transceiver, especially for use in UK and E U states where narrow fm is used more wildly. S ingle C rystal A ll modes R oofing F ilter to help res olve QR M\Noise F loor F M C lipper corrected waveform and helps improve aud io punch on narrow 2.00khz F M (F actory stock)-Up to 2.20khz for optimised users F M receiver demodulator AF gain recovery increased for Narrow F M C B system E T S I E urope F m R eceiver audio quieting improved, less background hiss. LT 455G W -9.0K hz filter 455khz to widen F M bandwidth on receiver side. Overall F requency stability of J opix S S 3900 set improved using hard\high temperature wax and T A7310 Mixer upgraded chip to original T oshiba device. Improved frequency drift and improved thermal prope rties to frequency critical parts. Improved S S B C arrier balance les than 1mW att Improved grounding of the P C B and screws Improved DC regulator and DC ripple capacitors. E xternal F requency C ounterF C -347olt regulator8 V Improved Alignment of radio suited for E U\UK markets\operation. T he following web links will provide handy referenc e guides to the radio. And credit goes to R ick of E uro R adios for his re-mastered drawings and schematic diagrams. P lease consider donating to this fab site to help s upport it. www.cbtricks.com
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INDE X S erv ic e Manual Main s c hematic s Web L ink http://w w w .c btric ks .c om/radios /c rt/s s _ 3900/g raphic s /s s 3900_ ept360015c _ mos fet. pdfP C B layout-Web L ink http://w w w .c btric ks .c om/radios /g alaxy/dx33hp/g raphi c s /33hp_ 3600-14b_ top.g if
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P arts to C hang es R emove parts and s ubs titute w ith new v alues as lis t ed. A ll modific ations have been v erified as g ood. DC R eg ulation and R ipple C aps MG 941118 Amp 300W P NP R S 737-8868 1off Loc T R -51- Up rated part 4700uF E lectro C ap R S 763-9431 1off Loc C 195-DC ri pple 1000uF 35V DC 1off Loc C 194-DC ripple 1000uF E lectro 25V DC 1off Loc C 199-DC ripple BZ X 79 7V 5 Diode R S 544-3632 1off Loc D-78-8V reg ulation E xternal F requenc y C ounter 8V reg ulator 7808F ixed V oltage R egulator 1off Loc mounted R HS chassis 47nF C apacitor R S 537-3937 2off Lo c-7808 R egulator-DC T O-220 Heat T hermal pad kit R S 712-8225 T O-220 S crew kit R S 298-500 Heat s ink K it rear Heat-sink (rear) R S 189-8331 1off Loc-fit rear of J opix R adio Or G A LAX Y P art No #MM7878041B Heat-sink T O-220 (use screw Insulator) 1off Loc-T R -45
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S S B C arrier L eakag e reduc tion 10K V ariable R S 743-2362 1off Loc V R -7 C arrier Balance 47pF Disc C eramic 1off Loc C 178-Driver Instabil ity 10pf Disc C eramic 1off Loc C 178-Driver Instabil ity Or 56pF +1pF C 178 220pF Disc C eramic 1off Loc C 175-Driver Instabi lity Heat-sink T O-220 (use screw Insulator) 1off Loc-T R -45 Heat-sink T O-220 (use screw Insulator) 1off Loc-T R -45 C opper F ingers S ee instructions T X Mixer shield S ee instructions E arth S trap S ee pictures P C B S crews S ee instructions Microphone S ocket Not T ight R oof F ilter 2K 7 R esistor R S 707-7704 1off Loc- LHS of 10M15 A filter 10.695Mhz 15khz Band W idth R oof F ilter 1off Loc I nsert C 59 place Quartz lab R oofing filter mount brass or tinned sheet 1mm Loc see picture T one- E nable-C 41 E nable tone to roll of high frequency audio for softer sound from radios speaker. Bridge S older jumper nearJ 4 topside of P C B F m Mic rophone g ain & T X Narrow F M E T S I\E N s pec s 1K R esistor R S 707-7666 1off Loc R 174-Mic G ain Boost 5K V ariable R S 743-2375 1off Loc V R -5 F M Dev 0R wire Link 1off Loc R 160-F M C lipper G ain
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R X Narrow F M E T S I\E N s pec s 220K R esistor R S 707-7903 1off Loc R 34-F M audio level increased 60% =1.2khz deviation for F M-Narrow 12K R esistor 1off Loc-Across L5 F m Discriminator 60%dev =1.2khz 10K R esistor 1off Loc-Across L5 F m Discriminator 60%dev =1.5khz 10nF (103) Disc C eramic 1off Loc-C 28 Allow more AF O/P from F m discriminator chip 4.7nF (472) Disc C eramic 1off Loc T opside P C B R 34\C 28 J unction/G ND-HF AF R oll off LT 455G W 1off Loc-F L1-F ilter 9.0khz bandwidth-T echno F ix UK S -Meter S ens itivity 1N34A G erm Diode E bay 1off Loc-P arallel Across D12-G ain IC -10 Mixer T A 7130 2pF C eramic C ap NP O E bay 1off Loc C 330-Improve K \C shift span C arrier B alanc e S w itc h-R F P rotec tion 1nF (103) Disc C eramic 2off Loc-D63/64 to ground V C O Improv ements Armour W ax E bay 1off Loc V C O\Mixer  P LL Offsets 10.950mhz Offsets Oscillator. Optional A m\F m A uto pow er S ee instructions
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Mis c
Heat-sink compound T -220 Heat sink and mounting kit S O239 UHF C onnector, F emale Maplins BW 84F R S 546-2627 3.5mm Audio J ack 2 offJ acks R eplace R anger US A T ransistor T R -45
Mixer C hip T A-7130 T oshiba E bay
1off
2off
1off
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S O239 S ocket
C W K ey & E X T S peake r
2S C 2314 - F (2S C 2028/2S C 1957) E L E F L OW R F T R ANS IS T OR .Loc-IC 10-S ta bility\T hermal
Modific ations - Out the box F ac tory F res h units Before commencing please check that radio function correctly and no apparent factory faults present. F unction switches work (band-move internal link to test) R F power OK R X sensitivity in all modes meets specs. C heck T X S S B that no carrier leakage. E nsure voice T ransmits and R X receives OK C heck all knobs and switches function and no shafts bent on knobs and channel selector\mode\band switch. T hes e tes t ens ure no fac tory faults before breaking s eals and any warranty! I would hig hly rec ommend tes ting eac h radio before hand to ens ure no problems or faults exis ts prior to modifying from bitter exp erienc e! E nable full band for testing purposes S ee videohttps://www.youtube.com/watch? v=V ye4meN9J Y 4R ef levels R F signal generator levels quoted in mic ro v olts P d F M T X 4W atts Dev 2.00khz max with 1khz test tone 50mV R MS (15khz LP F ) 26.955Mhz F M T X speech should not exceed 2.5khz Am T X 4W atts C arrier 98% Mod max with 1khz test tone 50mV R MS (15khz LP F ) 26.955Mhz S S B T X 20W atts max with 1khz test tone 50mV R MS (15k hz LP F ) 26.955Mhz S peech will be around 10-15W atts C arrier F M Modulation 1.2khz=60% Distortion 5% or less (9K hz B\W idth filters E T S I\E N specs) Am 30% Modulation 1khz test tone distortion 5% or less S -9=50uV P d on 26.955Mhz
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Before commencing please check that radio function correctly and no apparent factory faults present. F unction switches work ANL, C H-9, T one -Hi\LO (band -move internal link to test) R F power OK R X sensitivity in all modes meets specs. C heck T X S S B that no carrier leakage. E nsure voice T ransmits and R X receives OK C heck all knobs and switches function and no shafts bent on knobs and channel selector\mode\band switch. T hes e tes t ens ure no fac tory faults before breaking s eals and any warranty! I would hig hly rec ommend tes ting eac h radio before hand to ens ure no problems or faults exis t prior to modifying from bitter expe rienc e! R emove bottom cover screws to gain access to radio pcb, store screws in safe place. Don’t pull lid of quic kly!, s peaker leads are attac hed to S peaker on lid!!
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E xpans ion L ink-26.615-28.305Mhz
Locate Move Black link (move to this position 240channels) Here On radios P C B (towards front of radio), expansion mo de enabled. C heck bands A to F Use the T one HI\Lo front panel switch for BANDS Hi or Low P lug Optional F requency counter into rear plug on radio to monitor frequency band changes. C hec k A L L radio func tions and s pec ific ations before proc eeding to Modific ations T o ins ure 100& QA c hec ks and fault free radio.T ape around front bezel panel to protect from scratches
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