portal elektro: 2010

Minggu, 10 Oktober 2010

Pemancar mini (VCO) Ronica 88-108 MHz untuk pemula

Jumat, 01 Oktober 2010

BLX15 150 Watts NoTune FM broadcast (87,5-108MHz) RF-amplifier

BLX15 150 Watts NoTune FM broadcast (87,5-108MHz) RF-amplifier

All component values are drawn on the .comp and .silklayer bitmaps, with the following
exceptions;

1.- the collector 'choke' is constructed of a 220-Ohms 2 Watts carbon composite (i.e. Allen
Bradley or similar) resistor with an air-coil wound around the resistor body.
the air-coil consists of 5 Turns, 10 mm internal diameter, 1.2 mm enamelled copper
wire neatly spaced over the whole resistor body.
the air-coil is then soldered on both ends together with the individual resistor wires.
2.- the FXC1 wideband choke has 1/2 turn and is mounted vertically (a VK200-19/4B wideband
choke has 2.5 turns, so remove i.e. unwind 2 turns from this choke to get the desired
result)
3.- the resisitor mounted at the base of the blx15 is also a 2 Watts carbon composite
resistor with a ferroxcube-bead over one end of the resistor wire (the one wich is
connected to the base of the rf-transistor). The bead is 3 mm diameter and 5 mm in
length.
4.- connect the bottomlayer (groundplane) on several points (through via's) with the
toplayer of the pcb. THIS IS VERY IMPORTANT!

(!) solder the 2 pcs. 150pF capacitors, the 22-Ohms resisitor (with bead) and the ferroxcube
wideband choke (FXC1) as close as possible at the base of the blx15.

Notes

(I) all capacitors (unless otherwise noted) are silver mica types

VCC = Supply voltage 50 Volts at approx. 3.5 Amps.

CuL = magnetwire, enameled copper wire, insulated (rigid) copper wire e.t.c.
(Note: 1 mm equals approx. to #18 A.W.G
1.2 mm equals approx. to #17 A.W.G
0.8 mm equals approx. to #20 A.W.G
0.3 mm equals approx. to #28 A.W.G.)

(I) all diameters are measured from the inside of the coils, i.e. 'internal' diameter.
(II) make sure to mount the rf-transistor on a appropriate heatsink and use some thermal
heatsink compound between the flange and stud of the transistor and heatsink!
(Thermal resistance heatsink at least 6°C/W.)
(III) all parts are soldered directly on the toplayer of the pcb.

10mW-8W -rf amplifier (for 87.5-108MHz use only)

Supply voltage : 13,8 Volts (Vcc)
Power input : 10mWatts (approx.)

Power output : 8 Watts

RF Amplifier 40Watt (2SC1971 & mrf240) FM

2KW RF Amplifier with screengrid modulation (QB 7,5 1750)

RF Amplifier 5Watt (SD1127)

RF Amplifier 35Watt (SD1272)

Rabu, 29 September 2010

Transmitter FM 45W with valve

TECHNICAL CHARACTERISTICS:

Tendency of catering: 220V AC

Frequency of emission at FM: 88~108MHz

Force of expense: max 45W (without the R3),

R1...15KW/2W

R2...1KW/10W

R3...1KW/10W (for biggest force in the exit you replace with short-circuit)

C1...50pF trimmer

C2...30pF trimmer

C3...22pF/4KV

C4,C6,C9...10nF/1KV

C5,C7...1nF/1KV

C8...100mF+100mF/450V (Double electrolytic)

C9,C10...10nF

RFC1, rfc2, rfc3...air Inductors: 15 coils diameter 8mm, from wire 1mm.

T1...Transformer 220V/6V-1A

T2...Transformer of configuration with being first 4 or 8W

T3...Inductor with core ferrite (externally it resembles with small transformer but has a turn only).

D1...BY127 rectifier

LAMP...807 SYLV USA or EL34 or equivalent

ANRENA...5/8

S1...Main switch of catering.

S2...Switch of catering of rise (him we close after zestacej' the thread).

Most elements you can him find in a old back-white television with lamps.

Regulations:

With the C2 we regulate the frequency.

With the C1 we adapt the resistance of aerial (practically him we regulate so that it is heard our voice in the radio as long as you become cleaner).

Notes:

The catering better it does not become at straight line from the network 220V but via transformer 220V/220V of isolation and safety 1A.

When does not exist the R3, the force of expense is bigger, but respectively is increased also the hum 50Hz, because the simplicity of designing.

The control (Audio In) can become from a kasseto'fwno or other powerful source. If it is microphone it will be supposed precedes amplifier so that it acquires a force of order of 8W roughly.

Sabtu, 26 Juni 2010

BLF278 300W FM 87.5-108MHz RF broadband amplifier

BLF278 300W FM (87.5-108MHz) penguat RF-broadband

Resistor

R1 = 47 (chip-SMD resistor atau serupa)
R2 = 47 (chip-SMD resistor atau serupa)
R3 = 3k9 (chip-SMD resistor atau serupa)
R4 = 3k9 (1 / 2 watt
R5 = 1k5 (3 watt)
R6 = 12 (3 watt)
R7 = 12 (3 watt)
R8 = 6,8 (3 watt)
P1 = 2K5, 10 mm DIA., Horizontal mount (Piher)

Kapasitor

C1 = 27pF
C2 = 22pF pemangkas kapasitor, hijau
C3 = 65pF pemangkas kapasitor, kuning
C4 = 100nF
C5 = 100nF
C6 = 3.3nF
C7 = 100nF
C8 = 3.3nF
C9 = 1NF (porselen)
C10 = 1NF (porselen)
C11 = 22pF (porselen)
C12 = 47pF (porselen)
C13 = 47pF (porselen)
C14 = 22pF (porselen)

Semikonduktor

T1 = BLF278 (Philips)
D1 = 5,1 volt, 1,3 watt zenerdiode

Transformer, kumparan

TR1 = 01:04 broadband transformator Balun
Ferrocube, ketik: 2865000202 (Philips) dengan 2 tabung kuningan.
14 x 14 x 8 mm (corematerial harus memiliki frekuensi operasi kurang atau sama dengan
200MHz)
2,5 Primer teflon ternyata kawat (innerwire sebesar 3,3 mm Teflon membujuk akan melakukan)
Sekunder dua tabung kuningan disolder di salah satu ujung bersama-sama (sisi bias) dan lainnya
ujungnya disolder untuk program tabungan pendidikan mereka. gerbang tentang BLF278 (lihat gambar)
L1 = 1 / 2 gilirannya jepit rambut aircoil, 26 x 11 mm (tinggi x lebar), 2 mm diameter kawat AgCu
L2 = 3 berubah, diameter 10 mm, 2 mm kawat AgCU, 2 mm wirespacing
L3 = 3 berubah, diameter 10 mm, 2 mm kawat AgCU, 2 mm wirespacing
L4 = 3 berubah, diameter 10 mm, 2 mm kawat AgCU, 2 mm wirespacing
Z1 = 50-ohm coax teflon, 2.3 mm DIA., 22,5 cm
Z2 = 50-ohm coax teflon, 2.3 mm DIA., 22,5 cm
Z3 = 50-ohm coax teflon, 3,3 mm DIA., 24 cm
RFC1 = rf-tercekik, inti ferroxcube 2-lubang (Balun inti-yaitu) dengan 1 / 2 gilirannya, 2 mm CUL kosong
kawat melewatinya
RFC2 = VK200-19/4B broadband tersedak

Catatan

AgCu = perak berlapis kawat tembaga
CUL = magnetwire, kawat tembaga berenamel, terisolasi (kaku) kawat tembaga dll
(Catatan: 2 mm sama dengan kira-kira. Ke # 12 A.W.G
1 mm sama dengan kira-kira. untuk # 18 A.W.G
Kira-kira sama dengan 1,2 mm. untuk # 17 A.W.G
Kira-kira sama dengan 0,8 mm. untuk # 20 A.W.G
Kira-kira sama dengan 0,3 mm. untuk # 28 A.W.G.)

(I) semua diameter diukur dari bagian dalam gulungan, yaitu 'diameter'.
(II) pastikan untuk me-mount rf-transistor pada heatsink yang sesuai dan menggunakan beberapa termal
heatsink senyawa antara flens dari transistor dan heatsink!
(Heatsink Termal resistensi setidaknya 6 ° C / W)
(III) semua bagian sudah disolder langsung pada toplayer dari PCB tersebut.
(IV) bias adalah kira-kira. 1,4 volt

Selasa, 22 Juni 2010

Amplifier 10mWatt - 6Watt (BFR91&BFR96&2SC1971)

Garis PCB: 85 x 55 mm (lebar x tinggi), resolusi adalah 600dpi bitmap.
Gunakan FR-4 sisi ganda bahan photoresist epoxy PCB untuk hasil terbaik.

BFR91-BFR96 (S)-2SC1971 6 Watts siaran FM (87,5, 108MHz) Profline Broadband RF-amplifier

Semua nilai komponen diambil pada comp. Dan bitmap silklayer,. Dengan berikut
pengecualian;

1 .- mount ferroxcube manik-manik (3 mm, 5 mm panjang) di salah satu kabel dari 56E
resistor (yaitu kabel yang terhubung ke dasar-rf transistor 2SC1971)
2 .- yang 1uH dan 4.7uH gulungan koil adalah jenis cetakan siap pakai.
3 .- nilai resistor dalam ohm, 0.25watts (karbon atau metalfilm).
4 .- resistor ukuran diameter 10mm adjustable 47E, vertikal mount (Piher).
5 .- kapasitor keramik semua kecuali yang 10nF dan 100nF, ini adalah jenis multilayer.
6 .- dua kapasitor pemangkas adalah 22pF, Hijau (Philips).
7 .- dua 150E resistor (di kolektor dari BFR96 (S) dipasang secara vertikal.

(I) pastikan untuk me-mount rf-transistor pada heatsink yang sesuai dan menggunakan beberapa termal
heatsink senyawa antara flens dari transistor-rf dan heatsink atau lemari!
(Heatsink Termal resistensi setidaknya 6 ° C / W)
(II) semua bagian sudah disolder langsung pada toplayer dari PCB tersebut.

CATATAN: di beberapa tempat menghubungkan groundplane (bottomlayer) untuk groundplane tersebut pada
toplayer, pilih sesuka hati.

Selamat membangun!

Amplifier 10mWatt - 5watt (mrf237)

L1 = 7 Turns 6mm Diameter
L2 = 4 Turns 6mm Diameter
L3 = 4 Turns 6mm Diameter
L4 = 5 Turns 6mm Diameter
L5 = Hairpin 13mm Wide x 25mm High
L6 = 6 Turns 6mm Diameter
L7 = 5 Turns 6mm Diameter
L8 = 4 Turns 6mm Diameter

Jumat, 18 Juni 2010

150 Watts BLF177 FM broadcast (87,5-108MHz) RF-broadband amplifier

150 Watts BLF177 (87,5-108MHz) penguat RF-broadband

penguat ini memerlukan max. 8 Watts rf-drive untuk memberikan daya output 150 Watts.
tegangan Supply: 50 Volt, menyesuaikan bias ke approx. 1,8 Volts.

CuAg = perak berlapis kawat tembaga
CUL = magnetwire, kawat tembaga berenamel
(Catatan: 1 mm CUL sama dengan kira-kira. Untuk AWG18
Kira-kira sama dengan 0,3 mm. untuk AWG28)

(I) semua diameter diukur dari bagian dalam kumparan
(II) pastikan untuk me-mount rf-transistor pada heatsink yang sesuai dan menggunakan beberapa termal
heatsink senyawa antara stud-rf transistor dan heatsink!
(Heatsink Termal resistensi setidaknya 6 ° C / W)
(III) semua bagian sudah disolder langsung pada toplayer dari PCB yang
(IV) bottomlayer menghubungkan ke groundplane pada toplayer ini!

Catatan:

Tata letak siaran 150 Watts BLF177 FM (87,5-108MHz) penguat RF-broadband telah
dibuat dengan Sprint Layout v3.0.
Anda dapat memperoleh salinan Shareware di: http://www.abacom.de
Garis PCB adalah 155 x 100 mm (lebar x tinggi), resolusi adalah 600dpi bitmap.
Gunakan FR-4 sisi ganda bahan photoresist epoxy PCB untuk hasil terbaik.

(*) Ketika mencetak layout, pastikan untuk mengubah ukurannya!