Amateur roofing filter design
Dec 18, - In situations where signals greater than that level are encountered within the passband of the roofing filter, the Hardware AGC will limit the signal level presented to the DSP. Even though the DSP may be cranked down to hear only the desired signal, the signal gets through to the DSP front end and will. W5YR's Notes on Filtering & DSP Brittney. Age: 26. tri to imagine ur self in the eternal city with the most gorgeos ladi Email your suggestion to sales at inrad dot net. September 07, , Purchased a new Drake R-4C in • Used it during the ARRL m CW contest. • Radio performed miserably, yet Specs Were Good. • s: League expanded testing to include Noise Floor &. Dynamic Range, new concepts for the amateur. • R-4C tested well for Dynamic Range, but flunked CW contest Isabella. Age: 28. Call me now and I will try to give you my best Elecraft K3 Crystal ‘Roofing’ Filters Mar 31, - A roofing filter protects later stages, including amplifiers, mixers, narrower filters, and DSP subsystems, just as the roof on your house keeps rain out ofall of the rooms. But a roofing filter can be equally at home at a low first IF, if that is how the radio is designed. It still provides the same protective function. Jul 28, - IC Update: As discussed in the Icom publication "IC Technical News", the IC utilizes switched 15 kHz and 6 kHz 1st-IF roofing filters. While a 15kHz, or more, roofing filter is used in almost all current amateur transceivers, it is not the “optimal design” for SSB, CW, or AM. The IC utilizes. Ayana. Age: 29. Hello gentlemen The Icom has a 15 khz wide roofing filter - as a result of its up conversion high first IF design. On .. All the excuses and lame arguments from seemingly intelligent hams against mandated IMD standards for commercial ham radio equipment serves only the interests of the ham radio manufacturers profit. Supplier of custom designed, high performance quartz crystal filters for communications receivers and transceivers and more! ]; CW Filter for the Kenwood TS [May 1, ]; Kenwood TS Roofing Filter Mod -- Now Shipping [Feb 1, ]; AM Filter for the Yaesu FT [Dec 1, ]; Hz CW Filter for. INRAD introduces our new M-series line of microphones for Amateur Radio at the Dayton Hamvention. . After designing and installing a prototype Inrad roofing filter mod for the Yaesu FT, BDR testing at 20 kHz showed no improvement while the IMDDR was only slightly improved by 3 dB at the tone spacing of.