| Version | Kit of PCB and Parts |
|---|---|
| Brand | Mostly DIY RF |
Check the listing for details. Low-Pass Transmit Filter / 160M to 10M / 50W Rating. Condition: New. Listed at 19.95 USD. One of the first technical things a new Ham learns is that an RF signal coming from an oscillator or amplifier is rarely just a simple sine wave. In addition to deep attenuation of harmonic frequencies, other virtues of this design include that it uses standard-value capacitors, and that it provides extra attenuation of the second harmonic without increasing the filter’s SWR within the band for which it was designed.