In article ,
Peter Wieck wrote:
On Aug 26, 6:10*pm, Syl wrote:
Peter Wieck a écrit :
For the money, and if you can get to Kutztown, I will have a
consignment of SSTRAN AMT3000 units. $80, including all taxes and with
the SMT chip already installed.
Peter,
That transmitter is NOT FCC part 15 compliant for what I know.
This would be misleading as the OP requests a part 15 transmitter
BCB.
From the website:
· Legal to use in the US, no FCC license required
· Fully compliant with FCC Part 15 regulations
· 100 mW input power
· 100% Modulation
· 20Hz to 20kHz ±1 dB Audio Response
· Very Low Distortion
· Adjustable Audio Compressor/Limiter
This is a misleading statement, the SSTRAN AMT3000 does not include a limiter,
manufacturers claims not withstanding. A traditional limiter as used with AM
transmitters controls the modulation peaks, either by a clipping operation, or
with a high speed peak activated AGC amplifier, the SSTRAN AMT3000 includes
neither of these circuits. The so called "Compressor/Limiter" used in the
SSTRAN AMT3000 is an RMS controlled AGC amplifier with a knee in its compression
curve. The RMS control means that it doesn't pay any attention to the peak
levels that cause over modulation. SSTRAN calls it a "Limiter" because of the
knee in the compression curve, but it fails to operate as expected of a limiter
to prevent over modulation.
--
Regards,
John Byrns
Surf my web pages at,
http://fmamradios.com/