RF for Amateur Hobbies

COMET CAA-500 HF/VHF/UHF Antenna Analyzer

2011-11-20T10:11:00.005+07:00

General :

Expected price : US$ 450
Condition : New
Manufactured : 2011 (Japan)

Main Features:

1.8-500Mhz.
Measures SWR & Impedance Simultaneously.
Separate UHF Input with N(F) Connector
Portable - Operates on 4x AA Batteries (batteries not included)
Operating Range 1.8 - 500 MHz

Band A Range 1.8 - 5 MHz
Band B Range 5 - 15 MHz
Band C Range 15 - 45 MHz
Band D Range 45 - 95 MHz
Band E Range 95 - 162 MHz
Band F Range 162 - 255 MHz
High Range 255 - 500 MHz

Impedance Range 12.5 - 300 ohms
VSWR Range 1:1 to infinity
Oscillator Output 113 dBµ/50 ohm
External Power 8-16 VDC 250 ma
Size 3.3 x 6.9 x 2.5 inches (80x170x60 mm).
Weight 28 oz. (800 g)

Personal Comments:

Frequency Range 1.8 - 500 MHz
Internal Frequency Counter
Dual Needle Cross Needle VSWR Display
A transmitter is not required, stand alone operation
Functions: SWR and Impedance

Reference : CQ MAGAZINE PRODUCT REVIEW

YAESU QUADRA VL-1000 1 KW HF/6 M LINEAR POWER AMPLIFIER

2011-10-30T13:47:00.016+07:00

General:

Expected price : USD 4,000
Condition : New
Manufactured : Japan

Pesonal Comments:

Frequency range : 160 m ~ 15 m, and 6m
Final Power Transistor : 4 x 2 pair MRF 150 provide 1000 Watt Output SSB/CW (or 500 Watt on 6m SSB/CW/FM) with 80 Watt Input.
LCD Display provides a wealth of amplifier-status information, including peak power output, average power output, voltage, current, and SWR.
Yaesu World First feature is the panoramic SWR monitor, which displays before tuning and after tuning SWR information for points across a band, providing you with instant data regarding antenna system performance.
Built in Automatic Antenna Tuner /ATU.

DAIWA LA-2060 60 Watt VHF POWER AMPLIFIER FOR HANDY TRANSCEIVER

2011-09-23T23:40:00.002+07:00

General :

Expected price : USD 60
Condition : Used
Manufactured : 1985 (Japan)

Personal Reviews:

Frequency range 144 ~ 148 MHz, FM and SSB mode

Driver 2SC1946 and Final Power Transistor 2SC3147.

Power input 0.5 ~ 1 Watt

Power output 20 ~ 60 Watt with 70 Watt maximum at input 13.8 VDC, 9 Ampere

Built in 2 stage Low Pass Filter (LPF)

Analog meter indicator for Power Output.

ALINCO ELH-260D, 60 WATT VHF RF AMPLIFIER

2011-09-22T19:28:00.001+07:00

General :

Expected price : USD 50
Condition : Used
Manufactured : Japan (1985)

Personal Comments:

Frequency range 144 ~ 148 MHz, FM and SSB mode.
Power input 1 ~ 5 Watt
Power output 60 Watt with 5 Watt input at 13.8 VDC, 7 Ampere
Analog meter indicator for Power Output.

ALINCO ELH-230D 30 WATT VHF POWER AMPLIFIER

2011-09-21T21:29:00.003+07:00

General :

Expected price : USD 40
Condition : Used
Manufactured : Japan (1985)

Personal Comments :

Frequency Range 144 ~ 148 MHz, FM or SSB mode
Power Input 1 to 5Watt
Power Output 30 Watt maximum at 13.8 VDC, 4 Ampere nominal
RX Amplifier wit Low Noise GaAs FET
Original RF Power Transistor 2SC1946

PC POWER SUPPLY MODIFICATION TO BE 13.8 VDC OUTPUT

2011-09-21T20:59:00.008+07:00

General :

Reference : http://www.users.on.net/~endsodds/smps.htm
WARNING : ELECTRICAL SHOCK HAZARD !!!
Ensure the output always connected to load (existing Fan or additional 100 Ohm/2 Watt Resistor, otherwise the power supply will be malfunction forever !!!).

Original / Prior modification

After Modifaction

Personal Comment :

Simple and easy to be implemented

Another short cut :

Remove R40 and R39 (feed back from 3.3 V and 5.0 V)
Replace R41 with R fixed 10 kOhm serie with VR 47 kOhm (for adjusting Output up 15 VDC)
Replace C16 and C17 with 4700 uF/ 35 VDC for ripple supression

UHF Radio Link Module

2011-09-15T23:37:00.001+07:00

General :

Expected price : USD 10
Condition : New

TRANSMITTER :

Frequency : UHF
Modulation : ASK
Working Voltage : 3-12VDC
Frequency stability：±75KHZ
Reception sensitivity：－106DBM
Quiescent current：≤0.1MA
Receiver Data Output : High - 1/2 Vcc, Low - 0.7v
Transmitter Input Voltage : 3-12V (high voltage = more transmitting power)
Emission Distance : 100-800m in open ground

RECEIVER :

Frequency: UHF Band
Frequency stability：±200KHZ
Reception sensitivity：－106DBM
Quiescent current：≤5MA
Working current：≤5MA
Working volt：DC 5V
Output mode：TTL PWL
Size : 37 x 23 x 8mm

12 VDC to 12 ~ 35 VDC SWITCHING INVERTER / CONVERTER 10 AMPERES

2011-09-15T22:13:00.006+07:00

General :

Expected price : USD 12 (Rp. 120,000,-)
Condition : New
Manufactured :
Application : Step up converter for Mobile Power Amplifier (eg.12 VDC to 32 VDC), booster charger, or various application to supply electronic equipment from battery car/motorcycle.

Specification:

Input Voltage: DC 10~32 V
Output Voltage: DC 12~35 V ( adjustable, O/p Voltage > I/p Voltage by 2V )
Maximum Input Current: 16 A ( >10A Need cooling )
Maximum output Current: 10 A
Maximum Power: 150W, 100W Natural cooling
Efficiency: 94 % ( under input 16V, output 19V 2.5A )
Module Properties: Non-isolated step-up module (BOOST)
Full Load temperature rise: 45 ℃
Switching Frequency: 100KHz
Output ripple: 2%(max) 20M bandwidth
No-load Current: Typical 25mA
Load Regulation: ± 0.5%
Voltage Regulation rate: ± 0.5%
Dynamic response speed: 5% 200uS
Short-circuit Protection : None
Input Reverse Protection: None
Operating Temperature: Industrial (-40 ℃ to +85 ℃)
Size: 65 x 47 x 26 mm ( L*W*H )

DIAMOND GSV-3000, 30 AMPERE POWER SUPPLY

2011-09-06T19:40:00.006+07:00

General :

Expected price : USD 100 (Rp. 1.000.000)
Condition : 95% as new, all components are original as per manufacture specification.

Personal review :

Adjustable Output 1 ~ 15 VDC, with 30 A continuous 8 Hours, or 34 A intermittent 1 min ON/OFF.
Input 110 or 220 VAC
Load regulation less than 2%
Overload current fold-back at 40 A, 13.8 VDC
Ripple voltage 3 mVpp at 34 A, 13.8 VDC
Capable to supply 200 Watt Output power booster.
Weight 9 kg
This linear power supply (transformer based) having compact size, and suitable to provide power for modern transmitter, the ripple voltage is very small (3 mVpp) thus suitable to supply dc power to handy transceiver.
Cooling fans with temperature-sensitive expression (Little Noise)
50W × 150H × 240D mm

DAIWA LA-2035 35 Watt VHF POWER AMPLIFIER

2011-08-30T17:03:00.000+07:00

General :

Expected price : USD 40 (Rp.400,000,-)
Condition : Used
Manufactured : 1985 (Japan)

Personal review :

LA-2035R or LA-2035 without Receiver Amplifier.

DAIWA LA-2155 160 Watt VHF POWER AMPLIFIER

2011-08-30T16:23:00.002+07:00

General :

Expected price : USD 200 (Rp.2,000,000,-)
Condition : Used
Manufactured : 1985 (Japan)

Personal Review :

Frequency Range 144 ~ 148 MHz, FM or SSB mode
Power Input 1 or 25 Watt selectable
Power Output 160 Watt maximum at 13.8 VDC, 27 Ampere nominal
RX Amplifier wit Low Noise GaAs FET
Original RF Power Transistor 2 x 2SC2694 and 2SC1946

DAIWA LA-2080H 80 Watt VHF POWER AMPLIFIER

2011-08-30T16:16:00.002+07:00

General :

Expected price : USD 50 (Rp.600,000,-)
Condition : Used
Manufactured : 1985 (Japan)

Personal Review :

Frequency Range 144 ~ 148 MHz, FM or SSB mode
Power Input 1 ~ 5 Watt
Power Output 80 Watt maximum at 13.8 VDC, 12 Ampere nominal
RX Amplifier wit Low Noise GaAs FET
Original RF Power Transistor 2SC2094 (driver) and 2SC2694 (Final)

MIRAGE B-5030G - 300 WATT VHF POWER AMPLIFIER

2011-08-30T12:18:00.003+07:00

General :

Estimated price : USD 750 (Rp. 7,500,000,-)
Condition : New
Manufactured : 2003 (USA)

Personal Review :

Frequency range 144 ~ 148 MHz
Power Input 1 ~ 50 Watt
Power Output 300 Watt maximum at 13.8 VDC, 47 Ampere nominal
Power RF Transistor 4 x SRF3417.
Good RX low noise Amplifier to improve weak signals -- low noise GaAsFET preamp gives you excellent 0.6 dB noise figure. Select 15 or 20 dB gain.
Heavy-duty heatsink spans entire length of cabinet -- prevents overheating. Power transistors protected by Mirages Therm-O-Guard.
Full protected from high SWR and excessive input power. has warning LED. has smooth adjustable Transmit/Receive switching with remote external keying.

DIAMOND GZV-4000 SWITCHING POWER SUPPLY 5 ~15 VDC, 40 Amp CONTINOUS

2011-08-30T11:54:00.005+07:00

General :

Estimated price : USD 180 (Rp.1.800.000,-)
Condition : New
Manufactures : 2005 (Japan)

Personal review:

High Performance Switching Power Supply 40 Amp Continuous.
Noisy Fan
40 Amp Continuous Rating, 100% Duty Cycle.
Variable Voltage Control 5-15 VDC.
Voltage Control Knob has center detent at 13.5 VDC.
Overload & short-circuit protection with Current Foldback at approximately 42 Amp.
Over Temperature Protection.
Meter Selector allows monitoring of voltage & current.
Access to front panel DC Terminals and Cigarette Lighter Jack. Standard 40A terminals on rear panel.
Built in Speaker.
Circuitry yields high RFI protection from external sources.
AC line filter for EMI protection.
Standard 3-wire Heavy Duty line cord.
Power Indicator & Overload Indicator.
Accepts 220 VAC ± 20% 50-60 cps.
Ripple & Noise less than 8 mV r.m.s.
Weight: 4 kg.

ICOM R-3 HANDY SCANNER / RECEIVER WITH TV 0.495 ~ 2,450 MHz

2011-08-30T11:32:00.004+07:00

General :

Expected price : USD 250 (Rp.2.500.000,-)
Condition : New Old Stock
Manufactured : 2001 (Japan)

Personal Review :

Wide Receiver coverage from 495 kHz ~ 2,450 MHz
AM, Narrow FM, Wide FM mode
Included both TV RF and TV Video receiver capability (AM + FM TV)
Built in Color TFT screen.
Excellence sensitivity in all frequency coverage.
Fast scanning time (Faster than ordinary Transmitter)
RF Spectrum Analyzer.
RF signal finder feature for finding strongest RF signal (with 4 level attenuation)

YAESU VL-2000, 1.5 KW/1 KW MULTI MODE HF VHF LINEAR AMPLIFIER

2011-08-30T08:13:00.008+07:00

General :

Manufacture price : USD 7,000 (?)
Condition : New
Manufactured : 2011 (Japan)

Personal review :

Fully microprocessor controlled HF (160 ~ 10 m) and VHF (50 ~ 54 MHz) Linear Amplifier.
Built from 8 x VRF 2933 Power MOSFET
Power Input 1 ~ 50 Watt
Power Output 1,500 Watt with Supply from 46 VDC (63 Amp), +12 VDC (55 Amp), -12 VDC (1 Amp) from dedicated power supply.
Built in Auto Antenna Tuner.

ICOM IC-7410 HF VHF MULTIMODE TRANSCEIVER

2011-08-30T07:26:00.007+07:00

General :

Manufactured price : USD 1,900 (?)
Condition : New
Manufactured : 2011

Major features :

+30 dBm 3rd order intercept point (in 14MHz band)
Double conversion superheterodyne system improves inband IMD characteristics
32-bit floating point DSP unit
Built-in 15kHz first IF filter and optional 3kHz and 6kHz first IF filters
Large monochrome LCD display
±0.5ppm frequency stability
Built-in simple band scope
Built-in automatic antenna tuner
All mode (SSB/CW/RTTY/AM/FM)
Optional RS-BA1 for IP remote control

Other outstanding features

Built-in voice synthesizer announces operating frequency, mode and S-meter level

User programmable band edge beep (can be disabled)

VSC (Voice Squelch Control) function

RF speech compressor

Microphone equalizer and adjustable transmit bandwidth

Two preamplifier types: Preamp 1: Increases low level signal improving intermodulation characteristics, Preamp 2: High gain preamplifier

20dB built-in attenuator

Audio equalizer function

CTCSS and DTCS tone encoder and decoder

Triple band stacking register

Quick split function and frequency lock function

RIT and ΔTx variable up to ±9.999kHz

SSB/CW synchronous tuning automatically shifts the carrier point when switching between CW and LSB/USB modes

1Hz pitch tuning steps

Program scan, memory scan, select memory scan, mode select scan and Δf scan

Automatic tuning steps

AH-4 control circuit

Large independent MIC/RF power and Notch knobs

Personal review :

Wide RX/TX : 0.030 ~ 60 MHz / 1.8 ~ 54 MHz
Multimode : USB, LSB, CW, RTTY(FSK), AM, FM
Supply : 13.8 VDC (23 Amp Maximum)
Built in Auto Antenna Tuner

TS-440 SAT, 160 ~ 10 M HF TRANSCEIVER

2011-08-24T20:57:00.021+07:00

General:

Expected price : USD 400 (Rp. 4.000.000,-)
Condition : New Old Stock
ManufactureD : 1990 (Japan)

Personal review:

Complex HF transceiver, TX 160 ~ 10 M, RX 0.5 ~ 30 MHz
Full PLL Tuning
Multi Mode AM/FM/SSB/CW/FSK
Power Output 100 Watt or 50 Watt (AM)
Built in Antenna Tuner
Problem identified on type of glue factory used to keep some component from vibration, this glue material will conduct electricity more and more as it ages, and then will make the radio malfunction eventually. (indicated by dot or blank on frequency display).

Modification logs: (Various references from internet)

TS-440 calibration Cable
Carrier potmeter modification for Kenwood TS440 radio
PLL drift / shaking TS-440
Kenwood TS440S Mod's for weather over 30* C of ambiance.
No On Air / Tune / Notch lights on panel
TS-440S/AT stuck in TX mode
TS-440S audio output problem
Simple fix when dots display on readout for TS-440SAT
Replacing the memory battery in the Kenwood TS-440S
Bandscope-Schaltung mit TS-440S und SM-220 (BS-8)
Modifications for TS-440S in FM mode
IF-10 (RS-232) interface for TS-440s and TS-680s
TS-440 Displays dots on certain bands
Circuit Improvements for the TS-440S
TS440S mod for improved receive sensitivity of 0.5 to 1.6MHz
TS-440S PLL unlock due to VCO #1
TS-440S PLL unlock due to VCO #5
TS-440S Intermittent operation
TS-440S SSB Power-adjustment
TS-440 Fan Temperature Modification
Possible cure for TS440 showing dots only on display
Undocumented feature
Serial interface
A few adjustments you should know
TS-440S modification to use antenna tuner
TS-440S display calibration
Connection of the KENWOOD TS440S to a DATA
Kenwood Computer Interface Instructions
TS-440S increase the power by ALC control
TS-440 with PIN-Diods
TS-440S Operation with the MC-85
TS-440S Notch filter low frequency improvements
TS-440S Protecting Q33
TS-440S Case Screws binding in the heat sink
TS-440 RX Audio Mods
TS-440S Digital Audio Modification

SONY FH7 MK3 COMPACT HIFI 280 Watt PMPO

2011-04-21T10:38:00.007+07:00

General:

Expected price : USD 75 (Rp 750.000,-)
Condition : Used but excellent condition
Manufactured : 1980 (Japan)

FULL SET w/o SPEAKERS

Tuner Module

Power Supply Module

Personal review :

High Performance both sensitivity and selectivity FM/SW/AM Receiver
Compact Power Amplifier provide 280 Watt PMPO or 38 Watt x 2 RMS
5 band Graphics Equaliser.
High Performance Tape deck with Auto Reverse Playback

SONY FH-E939CD COMPACT HIFI 550 Watt PMPO

2011-04-21T10:31:00.008+07:00

General :

Expected price : USD 250 (Rp 2.500.000,-)
Condition : Used but in excellent condition
Manufactured : 1992 (Japan)

FH-E939CD

Receiver module

Personal review :

Compact 4 x 40 Watt + 1 Sub Woofer Power Amplifier Total 200 Watt RMS
4 Speaker boxes ( 2 Middle & High and 2 Bass), and Optional Sub Woofer
High Precision Audio Spectrum Analyzer
DSP technology applied (Programmable Sound Effect)
High performance FM receiver (excelent sensitivity and selectivity)
High performance Tape Deck with Auto Reverse Playback and Auto level Recording
High performance CD Player with Fiber Optic Digital Audio link
Complex Remote Control

KENWOOD TH-D72 140/430 MHz DUAL BAND TRANSCEIVER

2011-01-15T23:09:00.016+07:00

General:

Expected price : USD 500
Condition : New
Manufactured : 2010 (Japan)

Personal review :

144/430 True Dual Band Transceiver, Full duplex, Cross band capability.
Selectable transmitter power output 50 mW, 500 mW and 5 Watt.
Can employ as part of Kenwood's Skycommand System II+ when used with TS-2000 series.
Built in GPS receiver unit included Built-in GPS Antenna which is based on a SiRF star III receiver for GPS/APRS® operation.
Built in USB port, the TH-D72 can be connected directly to a PC.
Built in 1200/9600 bps TNC compliant with AX25 protocol.
Built in APRS, VOX, DCS, CTCSS, Cross tone, Stand alone Digi repeater.
Long operating hours (6 hours continuous operation using 5 Watt power transmitter) with 1800 mA Li-Ion rechargeable battery
IP45 Weather proofing.

0 ~ 15 VOLT, 2 AMPERE, DIGITAL POWER SUPPLY

2010-07-18T10:21:00.004+07:00

General :

Expected price : USD 20 (Rp 200.000,-)
Condition : New
Manufactured : 2010 (China)

Personal review:

Linier power supply (transformer based) means free from noise/frequency interference.
Suitable for testing small electronic equipment such as VCO module, hand phone, handy transceiver, etc.
Adjustable Voltage output (fine adjustment with 0.1 Volt step is provided) with short circuit / over current protector.
Load regulation (0.01 Volt) or less than 5%
Ripple voltage 5 mVpp at 12 VDC, 1 Ampere.

10 Hz ~ 2400 MHz DESKTOP FREQUENCY COUNTER

2010-07-15T07:08:00.008+07:00

General :

Estimated price : USD 45 (Rp. 450.000,-)
Condition : New
Manufactured : 2005 (China)

Prescaler board

Personal review :

4 selectable ranges : 10 Hz ~ 50 MHz, 50 ~ 2400 MHz, Counter, Crystal Checker.
3 selectable Gate times : 0.1 mS, 1 mS, 10 Second.
13 MHz Output for calibration purpose
Supplied from AC 220, 20 Watt
High brightness 8 x Led display 7 segments
Crystal time base with 30 ppm
Display the Frequency, Gate time, Hold the reading.
Medium sensitivity < 10 mV, able to detect frequency transmitter in radius less than 1 m (depending transmitter power)

GOOIT 50 MHz ~ 2400 MHz PORTABLE FREQUENCY COUNTER

2010-07-14T07:12:00.007+07:00

General :

Estimated price : USD 25
Condition : New
Manufactured : 2010 (China)

Personal review :

Frequency Range: 50Mhz to 2.4Ghz
Distance covered: 8m for U-band and 5m for V-band
External 9 VDC Battery required
Display Frequency, RF signal and Auto switch off
One button with all functions.
Medium sensitivity < 5 mV, able to detect frequency transmitter in radius less than 5 m (depending transmitter power).

YAEGE FC-1, 10 Hz ~ 2600 MHz PORTABLE FREQUENCY COUNTER

2010-07-12T18:49:00.007+07:00

General :

Estimated price : USD 50
Condition : New
Manufactured : 2010 (China)

Personal review :

Two selectable range : 10 ~ 50 MHz, and 50 ~ 2600 MHz
Built in rechargable Li-Ion Battery 1000 mAh.
TCXO time base with 30 ppm
Display the RF signal, Gate time, Hold the reading, Saving function, and battery condition.
Medium sensitivity < 5 mV, able to detect frequency transmitter in radius less than 5 m (depending transmitter power)