Message	Date	From	Subject
6765	2011-11-04 09:11:33	Alberto I2PHD	Terminating impedance of the Yaesu XF-455k-262-01 filter
Hello all, I am revamping an old JRC NRD-525 receiver. I applied the Kiwa mod for the ultimate 455 kHz rejection filter, and now I would like to add, in the Aux position, a crystal filter I have in my junk box since years, namely the Yaesu XF-455k-262-01 filter, which, according to its naming, should be a 2.6 kHz SSB filter with a shape factor surely better than the stock ceramic filter factory-installed in this radio. I have been unable to Google out the terminating impedance of this filter, to eventually modify the circuitry in the NRD-525 to comply with that spec. Does anybody have this data ? TIA -- /73 Alberto I2PHD/ [Non-text portions of this message have been removed]
6775	2011-11-05 05:36:15	Gian	Re: Terminating impedance of the Yaesu XF-455k-262-01 filter
Ciao 'Uaglio', the 455kHz filters in the Yaesu rtx are usually 2000 ohms // 30 pF Enjoy your mods... 73 Gian I7SWX
6777	2011-11-05 09:18:04	Alberto I2PHD	Re: Terminating impedance of the Yaesu XF-455k-262-01 filter

Hello all,

I am revamping an old JRC NRD-525 receiver. I applied the Kiwa mod for the ultimate 455 kHz rejection filter,
and now I would like to add, in the Aux position, a crystal filter I have in my junk box since years, namely the
Yaesu XF-455k-262-01 filter, which, according to its naming, should be a 2.6 kHz SSB filter with a shape factor
surely better than the stock ceramic filter factory-installed in this radio.

I have been unable to Google out the terminating impedance of this filter, to eventually modify the circuitry
in the NRD-525 to comply with that spec.

Does anybody have this data ?

TIA

--
/*73 Alberto I2PHD*/

[Non-text portions of this message have been removed]