Heil Parametric Receive Audio System RFI Kit - 6 filtersProduct DetailsMPN: RFI-PRASType: NEWCountry/Region of Manufacture: USAFilter Power Rating (PEP watts): not applicableRFI Suppression Range (MHz): 1-300 MHzThis RFi kit was created to eliminate RFI issues from the excellent Heil Parametric Receive Audio System which can highly tailor audio signal from your radio to a a powered speaker or multiple headphones. However when installed near a high powered HF antenna it can ave RFi issues. This kit was created out of necessity from a ham using high power antennas near the radio. The use of the ferrite filters completely eliminated the RFI issue allowing the ham to enjoy the use of the PRAS.
The ferrite filters are selected to suppress RFI from 1 to 300 MHz. The filters are easy to install, don’t require modification of the protected equipment and work in almost all cases. See product picture for suggested filter use.
What is included in the kit?
The RFI-PRAS kit contains a a ring filter for the AC power cord used on the DC supply cables to the PRAS and high powered speakerr and 3 additional snap-on filters for the both ends of the speaker cable and for the audio input (from the transceiver/audio source) to the PRAS..
You get 1 ring filter and 5 1/2" ID snap on filters and an installation manual.
This RFi kit was created to eliminate RFI issues from the excellent Heil Parametric Receive Audio System which can highly tailor audio signal from your radio to a a powered speaker or multiple headphones. However when installed near a high powered HF antenna it can ave RFi issues. This kit was created out of necessity from a ham using high power antennas near the radio. The use of the ferrite filters completely eliminated the RFI issue allowing the ham to enjoy the use of the PRAS.
The ferrite filters are selected to suppress RFI from 1 to 300 MHz. The filters are easy to install, don’t require modification of the protected equipment and work in almost all cases. See product picture for suggested filter use.
What is included in the kit?
The RFI-PRAS kit contains a a ring filter for the AC power cord used on the DC supply cables to the PRAS and high powered speakerr and 3 additional snap-on filters for the both ends of the speaker cable and for the audio input (from the transceiver/audio source) to the PRAS..
You get 1 ring filter and 5 1/2" ID snap on filters and an installation manual.
Christmas lights or yard lights with switching DC power supplies are often the RFI source and a clamp on ferrite bead on the AC AND the DC side feeding the lights is needed to help suppress the switching power supply RFI noise. Suitable snap on beads are FSB31-1/2 for the 1-250 MHz range.
We have also had reported wireless HDTV boxes, and FOSCAM and AMCREST security camera systems causing RFI to garage door remote openers. Use our Garage Door Opener RFI kit to suppress the interference to the opener (VICTIM) – you need one kit for each opener. Maximize the distance from the camera to the openers may also help. Additionally shield cable to the garage door sensors may be needed depending on severity of the camera RFI.
Obvious Tech Note: make sure your remote batteries have enough energy to activate the GDO or the signal they transmit may not be large enough to over ride the RFI signal, but a fresh battery may be able to overcome the weak RFI source and allow the GDO to operate correctly.