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Compare FM Transmitter Kits

Exciters / Low power transmitters

Kit Broadc@st
W@rehouse
Broadc@st
W@rehouse
bw0001
Mighty's
M@X-1.1

North Country R@dio MPX96

P@naxis
FMX
R@msey
FM-10A
R@msey
FM-25

Sm@rt Kit
25 W VCO

Veronic@
1W VCO
Veronic@
1W PLL
Veronic@
5W VCO
Kit
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
Mono/Stereo Mono Mono Mono Stereo Mono Stereo Stereo Mono Mono Mono Mono Mono/Stereo
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
Remarks No LCD.
See review
Marconi's review
LCD Included
"No Tune" design. Optional pre-emphasis.
Marconi's review
See my review
LCD menu system
helps tune TX.
Built-in diagnostics.
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
Marconi's review
See FAQ LCD available from others.
See Schematic.
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.
See Schematics
Why does it have a big 1.5x harmonic ?
  Remarks
Price indication
kit form, ex-works
57.95
= $ 93
89.95
= $ 145
$130 $ 75 $ 120 $ 34.95 $ 129.95 Approx 150$ 37.95
= $ 61
66.95
= $ 108
51.95
= $ 84
Price indication
kit form, ex-works

NOTE:

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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