Difference between revisions of "70MHz filters"
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Higher power duty filters. | Higher power duty filters. | ||
| − | In CQ-TV 260 Charles G4GUO published a low pass filter using ATC capacitors to go in a die cast box. | + | In CQ-TV 260 Charles G4GUO published a low pass filter using ATC capacitors to go in a die cast box. |
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Mini-kits sell a [https://www.minikits.com.au/electronic-kits/filter-kits/vhf-lowpass-filters/LPF7-75M low pass filter kit] described as a 75MHz 7th order Chebychev Low Pass filter. | Mini-kits sell a [https://www.minikits.com.au/electronic-kits/filter-kits/vhf-lowpass-filters/LPF7-75M low pass filter kit] described as a 75MHz 7th order Chebychev Low Pass filter. | ||
Band pass filters may present a problem. The [https://www.qrp-labs.com/bpfkit.html QRP-Labs 12m or 10m Band pass filter kits] may be a valid point for starting on experimentation for your receiver application. | Band pass filters may present a problem. The [https://www.qrp-labs.com/bpfkit.html QRP-Labs 12m or 10m Band pass filter kits] may be a valid point for starting on experimentation for your receiver application. | ||
Revision as of 18:36, 13 January 2020
Low pass filters on 4m remove signals from e.g. the broadcast radio band beginning at 88MHz.
QRP-Labs sell a Low Pass Filter kit for 4m that may be suitable for 71MHz duty with the Portsdown TX.qrp-labs.com lpf kit
Higher power duty filters. In CQ-TV 260 Charles G4GUO published a low pass filter using ATC capacitors to go in a die cast box.
Mini-kits sell a low pass filter kit described as a 75MHz 7th order Chebychev Low Pass filter.
Band pass filters may present a problem. The QRP-Labs 12m or 10m Band pass filter kits may be a valid point for starting on experimentation for your receiver application.