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

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

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

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

DAIWA LA-2065 65 Watt VHF POWER AMPLIFIER

General :

• Expected price : TBA
• Condition : Used
• Manufactured : 1985 (Japan)

Personal Reviews:

• Frequency range 144 ~ 148 MHz, FM and SSB mode
• 1 x Final Power Transistor 2SC3147.
• Power input 1 ~ 5 Watt
• Power output 10 ~ 60 Watt with 70 Watt maximum at input 13.8 VDC, 9 Ampere
• Built in 2 stage Low Pass Filter (LPF)
• Built in  15 dB low noise RX Amplifier

PC POWER SUPPLY MODIFICATION TO BE 13.8 VDC OUTPUT

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 :

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

UHF Radio Link Module

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

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

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