Compare FM Transmitter Kits
Exciters / Low power transmitters
North Country R@dio MPX96
|RF Output||700mW typ >1W||1W typ 800mW min||4 W typ !!!||10mW, 1W 1||20-500mW ~200mW||Couple of W ~8 mW||Couple of W ~8 mW||25W||1 Watt. >900mW @16V||900 mW typ||5 W||RF Output|
|VCO / PLL||PLL, frequency doubler||PLL with LCD||PLL with LCD and
4W Power stage
|PLL||PLL, optional LCD||VCO||PLL||VCO||Frequency Doubler VCO,
drifts with temperature,
Vcc, Antenna changes
|PLL||VCO||VCO / PLL|
|Frequency Range||87.5-108 MHz 2||87.5-108 MHz||86-110 MHz 2||76-108 MHz||87.9 - 107.9 MHz||88-108 MHz||88-108 MHz||88-108 MHz||88-108 MHz||88-108 MHz||88-108 MHz||Frequency Range|
|Harmonics||- 50 dB||- 60 dB -62dB||-60 dB||-50 dBc||- 40 dB -31dBc||Very good filter needed||Very good filter needed||???||-43 dB||-35 dB||???||Harmonics|
|Spurious signals||- 60 dB||- 75 dB even better||-68 dB||-60 dBc||- 50 dBc -67 dBc||Very good filter needed||Very good filter needed||???||???||- 40 dB||???||Spurious signals|
|Audio Freq response||20Hz-70KHz||20Hz-100KHz||20Hz-70KHz||20Hz-15KHz||40Hz - 90KHz||???||???||???||30Hz - 76KHz||30Hz - 76KHz||30Hz - 76KHz||Audio Freq response|
|S/N Ratio||> 75 dB||> 75 dBu||???||???||???||???||???||???||> 60dB||75 dB||> 60 dB||S/N Ratio|
"No Tune" design. Optional pre-emphasis.
See my review
|LCD menu system
helps tune TX.
See my review
|Coils must be built, Component labels are not silk -screened onto board.||LCD
available for $ 70.
Direct Freq readout on BCD switches.
See Schematics and Review
Here is Spectral Output
available from others.
See Spectral Output
3 More plots
|Only pre-assembled available. Straightforward design similar to those on Pulsar / HansH site. Badly needs a Zener around oscillator. See Schematic||See Marconi's Review. Could use a Voltage regulator !!||No LCD.
See Spectral Output.
Why does it have a big 1.5x harmonic ?
kit form, ex-works
= $ 93
= $ 145
|$130||$ 75||$ 120||$ 34.95||$ 129.95||Approx 150$||£ 37.95
= $ 61
= $ 108
= $ 84
kit form, ex-works
1. More power available in "Export
mode" or via simple mods.
2. Frequency range easily changeable by Manufacturer
3. It appears that R@msey now only sell the FM-25A, a latter model that has a built-in filter that greatly improves Spectral output (Lesser harmonics, not lesser Spurs and Phase noise). Visit Mark Wyman's site to see Spectral Output of current version.
To avoid getting sued, I must state here that :
A) I do not aid / abet / suggest / promote / condone any illegal activity
B) Data shown above is fictitious and has no connection to any similarly n@med M@nufacturers.
The above data is based on the M@nufacturer's published data or rumours on the Net as of Sept 1998.
It is not verified or tested by me, or approved by the M@nufacturer.
The M@nufacturers could be making other transmitter kits besides those mentioned here.
M@nufacturers normally reserve the right to improve their product and change specs/price at any time.
IMPORTANT : Please always contact the M@nufacturers
to find out latest and correct specifications / price.
Please feel free to contact me if you have any corrections/suggestions for the above table.
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