Even although this line of radios is obsolete (except FT-818ND) there is still many of people who are looking for installation guide of the optional filters...
1. Type of filter
526-8733-010: 455.00kHz center frequency / 0.3kHz BW @ -3dB / 1.00kHz BW @ -60dB / -10dB insertion loss / 7-poles (simply 300Hz / 7-poles filter)
526-8733-010 (alias Inrad #712): 455.00kHz center frequency / 0.34kHz BW @ -6dB / 0.85kHz BW @ -60dB / -9dB insertion loss / 7-poles (simply 300Hz / 7-poles filter)
526-8686-010: 455.00kHz center frequency /
0.45kHz BW @ -3dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)
526-8686-030 (alias XF-115C): 455.00kHz center frequency / 0.45kHz BW @ -6dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)
2. ESD protection
Install and use some ESD protection tools on bench like ESD mat grounded properly through 1.5MOhms resistor and wristband connected to the ESD mat at the corner.
3. Installation the filter (hardware)
For correct installation you can follow the manual for FT-817ND see page 74 (or respective FT-8xx version of radios).
Front panel view > slide into the socket while 3-pins are on the left and four pins are on the right side > filter case upwards. Push carefully on both sides at the same time to click into the headers.
Also you
can check details here:
SP6AB
radio blog: Home made CW YF-122C filter board for Yaesu FT-817/857/897
4. Filter board setup
Which filter is installed on the filter's PCB is defined by installed resistors combination.
If it is factory soldered, then do not care about it.
If you
installed yourself then check the proper resistors setup also on the link here:
SP6AB
radio blog: Home made CW YF-122C filter board for Yaesu FT-817/857/897
5. Installation the
filter (software) – Menu 38
After assembling the radio back and turning it on go to Menu 38 (long press F-button and turn the SEL knob on the left to position 38) and change the OP FILTER menu from OFF to CW in the middle row (by main dial knob). Then exit by long press F-button.
6. Activation the
filter – NAR function
If all is
ok and no ghostbusters in your radio, then now when you will short-press the
F-button and using SEL knob you will find the IPO / ATT / NAR menu in third
lowest row on the display > after pressing C-button (right under display)
assigned to NAR function you should be able to select narrow filter for CW
which is installed in radio. Also, it would be hearable by narrower and lower
noise in speaker.
Note: For some reason some users are
reporting that when trying to select CW position in Menu 38 there is only OFF
and SSB... but after careful turning back and forth it should appear CW...
Hope it helps.
73 - Petr, OK1RP
"Apple, Ten-Tec & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
Installation document by P. Ourednik, 15-May-2024.
Document 05-24, rev.4.0
