400W Low Pass filter with built-in SWR/Power meterMost FM transmitters produce harmonics at even multiples of your fundamental frequency. If your harmonics fall on or near a TV channel or Maritime frequency you could cause severe interference to that channel.
The most common cause of fines from federal agencies is due to TVI or other interference from your transmitter which generates a complaint. Use of the nicely priced PCS 3000 low pass filter is the best method of eliminating this kind of interference.
The low insertion loss of the PCS-3000 filters makes them well suited for use on power levels as low as 10 watts on up to 400 watts!
These units are constructed using high-quality 1KV mica capacitors and silver-plated wire! SWR and PWR voltages are provided for power/swr measuring purpose.
Two calibrating trimmers are provided as well to simplify operation. SWR protection circuitry is provided as well and its sensitivity can be adjusted with one of the trimmers.
When reflected power (SWR) reaches certain level swr protection output goes low and pulls more current low as the reflected power increases. This can be connected to the bias circuitry in your amplifier to shut-down the power and prevent damage to the output transistors.
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FM Antennes accessoires
