    
Tech808
Moderator
Username: Tech808
Post Number: 9069
Registered: 8-2002
| | Posted on Tuesday, January 24, 2006 - 2:46 pm: | 
|
MAGNUM INTERNATIONAL
MINI MAGNUM 30W
COMPACT 10 METER MOBILE TRANSCIEVER
COPPER PART #P03-01099
Complete Specifications, Modifications, and Non - Technical Review.
By
Lon ~ Tech808 ~ N9CEF
General Specifications
| | | Frequency Coverage | Transmit and Receive 28.000 - 29.690 MHz | | Emission Modes | AM (A3E) | | Antenna Impedance | 50 ohm unbalanced | | Frequency Control | Digital Phase-Lock Loop(PLL) Synthesizer | | Power Requirment | 12.0 - 13.8 VDC ~ Negative Ground | | Operating Temperature | -20° to +60°C | | Dimensions | 5.1 x 1.3 x 7 inches | | Weight | 1.75 lbs. |
Transmitter Specifications
| Power Output | AM ~ 4 Watts Carrier / 30 Watts PEP | | | | Final Transistors | ERF-2030 Mosfet x 1 | | Spurious Emissions | More than 50dB below peak output power | | Frequency Response | 400 to 2800 Hz | | Microphone Impedance | ECM 600 to 1K ohms |
Receiver Specifications
| Circuit Type | Dual Conversion Superheterodyne | | Intermediate Frequencies | 1st IF ~ 10.695 / 2nd IF ~ 455kHz | | Sensitivity | AM ~ 1.0uV at 10dB S+N/N | | Selectivity | AM 6.0kHz (-6dB) / 18kHz (-60dB) | | Adjacent Channel Rejection | Better than 65dB | | IF Rejection | Better than 65dB for all frequencies | | Frequency Response | 250 to 3000 Hz | | Audio Output Power | 2 watts minimum at 10% THD with an 8 ohm load | | Audio Output Impedance | 8 ohms |
Q22 = ERF-2030 (Final) ~ Q21 = 2SC2314 (Driver) ~ Q20 = 2SC3195 (Pre-Driver)
TUNE-UP / POWER TWEAKS
None Required or Recommended!
Note!
There is NO reason to REMOVE the Modulation Limiter Q10 (2SA1267)) as the (Modulation Adjustment) RV-4 is already full open direct from the factory and you will gain nothing by removing Q10.
Everything is already set at the factory for MAXIMUM Performance.
MODIFICATIONS
There are no other Modification's that I know of at this time for this radio.
Should other Modification's or Tips become avialiable I will keep you updated.
MICROPHONE WIRING
Pin #1 ~ Ground (Gnd)
Pin #2 ~ Microphone Audio (AF)
Pin #3 ~ (TX)
Pin #4 ~ Receive (RX)
PROS & CONS
PROS:
The addition of the  ERF-2030 Mosfet Final that delivers the full 30 watts +
The Mini Magnum's Small Size (5.1 x 1.3 x 7 inches) allows it to be used / mounted in most any application or vehicle.
Easy to use for the first time user or for those who are more experienced and just Want or Need a GREAT Performing (Small Size) AM Radio.
CONS:
You MUST use the Factory Mini Mag Microphone that comes with the radio as it was designed for use with this radio to see Maximum Output Power.
I tried using other Magnum Microphones and After Market Microphone's and NONE except the Stock Mini Magnum Microphone would allow Maximum Output Power with 14.2 Volt's input power.
REVIEW and COMMENTS
FINAL COMMENTS!
This Mini Magnum 30W is a MUST HAVE for those of you who "want or need" a Small, High Powered (30+ Watts) AM Radio.
Respectfully Submitted,
Lon
Tech808
N9CEF |
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