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radios:ft-857d [2023/04/15 17:05] – m0lteradios:ft-857d [2023/04/15 17:49] (current) – [RF out] m0lte
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 ====== Yaesu FT-857D ====== ====== Yaesu FT-857D ======
  
-A 160m to 70cm, all mode, portable, 100W radio without a tuner.+A 160m to 70cm, all mode, portable, 100W radio without a tuner. Great for high-ish power portable paired with a fairly chunky battery, and resonant antennas.
  
-===== Technical fixes =====+===== Technical ===== 
 + 
 +==== RF out ==== 
 + 
 +It is fairly straightforward to add an SDR output to this radio, with an inexpensive [[https://www.sdr-kits.net/index.php?route=product/product&product_id=162|HupRF Panoramic Adapter Tap (PATV)]] Board or similar, which is just a small buffer amplifier. Using this board you can directly connect something like an SDRplay RSP and watch whole bands at a time, including setting up click-to-tune etc. 
 + 
 +==== Filter failure ====
  
 The FT-857D has an issue where ceramic filters go bad and the receiver fills with crashes, even with no antenna connected. Apparently this is due to a design error. If yours hasn't failed yet, prevention is possible, see {{ :radios:ft857-897_cf1005-fix.pdf |}}. Apart from the symptom, a Yaesu technician reports that if your filters have a "dusty" or "hazy" appearance, it is likely they have failed / will fail soon.  The FT-857D has an issue where ceramic filters go bad and the receiver fills with crashes, even with no antenna connected. Apparently this is due to a design error. If yours hasn't failed yet, prevention is possible, see {{ :radios:ft857-897_cf1005-fix.pdf |}}. Apart from the symptom, a Yaesu technician reports that if your filters have a "dusty" or "hazy" appearance, it is likely they have failed / will fail soon. 
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 The components I have been supplied are marked CFWM 455E, LTM 455GW, LTM455HW. The components I have been supplied are marked CFWM 455E, LTM 455GW, LTM455HW.
  
-1 x LTM455H 455kHz IF ceramic filter +From Technofix: 
-Replaces LTM455HW, CFWM455H, ALFYM455H+ 
 +1 x LTM455H 455kHz IF ceramic filter\\  
 +Replaces LTM455HW, CFWM455H, ALFYM455H\\ 
 6kHz 6dB bandwidth, commonly used for AM 6kHz 6dB bandwidth, commonly used for AM
  
-1 x LTM455E 455kHz IF ceramic filter +1 x LTM455E 455kHz IF ceramic filter\\  
-Replaces LTM455EW, CFWM455E, ALFYM455E+Replaces LTM455EW, CFWM455E, ALFYM455E\\ 
 15kHz 6dB bandwidth, commonly used for FM(W) 15kHz 6dB bandwidth, commonly used for FM(W)
  
-1 x LTM455G 455kHz IF ceramic filter   +1 x LTM455G 455kHz IF ceramic filter\\  
-Replaces LTM455GW, CFWM455G, ALFYM455G  +Replaces LTM455GW, CFWM455G, ALFYM455G\\  
 9kHz 6dB bandwidth, commonly used for FM(N)   9kHz 6dB bandwidth, commonly used for FM(N)  
 +
 +For me, CFWM 455E is CF2, LTM 455GW is CF3, and LTM 455HW is CF5.
radios/ft-857d.1681578308.txt.gz · Last modified: 2023/04/15 17:05 by m0lte