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International Radio :: Products by radio :: Yaesu :: FT-847

Collins mechanical filters or crystal filters for the 455 kHz SSB optional filter slot are no longer available for the FT-847 from INRAD. We have exhausted our supply of adapter circuit boards with matching network for this transceiver model. CW filters are still available. Collins mechanical filters #705 (500 Hz) and #712 (300 Hz) are direct mounted onto our "C" board for direct plug-in into the FT-847 CW optional filter slot. Crystal filters available in 5 different bandwidths are wired-in with RG174U coax to our "C" board, as the case size of the radio will not accommodate the filter being installed directly onto the board. To install a crystal filter, we pre-wire the filter and board for you. The "C" board is plugged into the optional slot, and then the crystal filter and coaxial cables are placed elsewhere inside the case (directions with pictures provided). No soldering necessary. The FT-847 can use either Collins filters or crystal filters in the CW slot, but crystal filters have much better shape factors than mechanical filters and will improve the selectivity of the radio. Since the crystal filters are much larger and will not fit in the sockets, they must be wired in as described above.

Your crystal filter choices for the radio are:

Bandwidth (Hz)1000500400250125
ModeCWCWCWCWCW
Crystal Filters #713 #721 #703 #704 #719

We have plug-in Collins filters for the radio as well, if this is your preference:

Bandwidth (Hz)500300
ModeCWCW
Collins Filters #705 #712

FT-847

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#702
2100 Hz 455 kHz SSB 8-pole...
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#703
400 Hz 455 kHz CW 8-pole...
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#704
250 Hz 455 kHz CW 8-pole...
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#705
500 Hz 455 kHz CW 7-pole...
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#706
2500 Hz 455 kHz SSB 8-pole...
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#712
300 Hz 455 kHz CW 7-pole...
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#713
1000 Hz 455 kHz CW 8-pole...
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#714
1800 Hz 455 kHz SSB 8-pole...
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#715
2800 Hz SSB 455 kHz 8-pole...
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#719
125 Hz 455 kHz CW 8-pole...
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#720
2000 Hz 455 kHz SSB 8-pole...
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#721
500 Hz 455 kHz CW 8-pole...
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#732
4000 Hz 455 kHz SSB 8-pole...
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VOX Box
It's a great little radio, but...
VOX Box
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