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FT 817 hidden menu

FT 817 hidden menu

Wanna know how to access to a Yaesu FT 817 hidden menu?
It’s very simple: just push and hold A, B and C simultaniously while putting the rig on, and you’re in the hidden menu with about 57 settings.

Now that you entered the FT 817 hidden menu you can interpretate these values following this table.

Menu No. Name Memory address (HEX) Description
01 HF1RXG 7 IF gain setting for HF band 1 (0.1-<2.5 MHz.)  This adjustment sets a bias current into D1063 in the 1st IF.  This changes the attenuation of this stage and has an effect on AGC, S-Meter, and noise blanker operation as well as having an effect on the “apparent” sensitivity of the FT-817.  Higher numbers = less attenuation (which equals higher gain – but not necessarily greater sensitivity.)
02 HF2RXG 8 The same as HF1RXG, except that it adjusts the IF gain setting for HF band 2 (2.5-<10.5 MHz.)
03 HF3RXG 9 The same as HF1RXG, except that it adjusts the IF gain setting for HF band 3 (10.5-<33.0 MHz.)
04 50MRXG A The same as HF1RXG, except that it adjusts the IF gain setting for the “50 MHz” band (33.0-56.0 MHz.)
05 VHFRXG B The same as HF1RXG, except that it adjusts the IF gain setting for “VHF” (108.0-154.0 MHz.)
06 UHFRXG C The same as HF1RXG, except that it adjusts the IF gain setting for UHF (420.0-470.0 MHz.)
07 SSB-S9 D This adjusts the amount of signal required for an S-9 reading in the AM/SSB/CW modes on all bands.
08 SSB-FS E This sets the amount of signal required for a full-scale reading in the AM/SSB/CW modes on all bands.
09 FM-S1 F This sets the amount of signal required for an S-1 reading in the FM mode.  (Does not apply to WFM in the FM broadcast band.)
10 FM-FS 10 This sets the amount of signal required for a full-scale reading in the FM mode.  (Does not apply to WFM in the FM broadcast band.)
11 DISC-L 11 This sets the lower threshold for the “Discriminator Center” detection in the FM-N and FM modes.  This threshold is typically set for 3 KHz below the display frequency.  (Does not apply to WFM in the FM broadcast band.)
12 DISC-H 12 This sets the upper threshold for the “Discriminator Center” detection in the FM-N and FM modes.  This threshold is typically set for 3 KHz above the display frequency.  (Does not apply to WFM in the FM broadcast band.)
13 FM-TH1 13 This is believed to set the “bottom end” of the squelch range threshold.
14 FM-TH2 14 This is believed to adjust the amount of hysteresis in the squelch response.
15 FM-TI1 15 The precise function is unknown, but it appears to affect how the squelch operates in the presence of a received signal.  (Possibly an adjustment for a squelch time constant.)
16 FM-TI2 16 The precise function is unknown, but it appears to affect how the squelch operates in the presence of a received signal.  (Possibly an adjustment for a squelch time constant.)
17 VCC 17 This sets permits calibration of the voltmeter.  The voltmeter will display a voltage equal to 1/10th the displayed calibration value whenever the voltage being applied to the radio (at that moment of “calibration”) is applied.  (See calibration info on this page for information on adjustment.)  The actual calibration value used to calculate the displayed battery voltage is stored in the EEPROM at memory location 0x53.
18 HF1-IC 18 This sets the maximum amount of current that the radio can draw when transmitting in the HF1 band (0.1-<2.5 MHz.)  This is overcurrent protection for the radio’s finals and is measured by monitoring the voltage drop across one of the windings of T1035.  Higher values = higher current.
19 HF2-IC 19 The same as HF1-IC except that it applies to the HF band 2.
20 HF3-IC 1A The same as HF1-IC except that it applies to the HF band 3.
21 50M-IC 1B The same as HF1-IC except that it applies to the 50 MHz band.
22 VHF-IC 1C The same as HF1-IC except that it applies to the VHF band.
23 UHF-IC 1D The same as HF1-IC except that it applies to the UHF band.
24 HF1-HI 1E This sets the RF output power in the HI power setting for HF Band 1 (5 watts.)  Lower value = Lower power.
25 HF1-L3 1F This sets the RF output power in the L3 power setting for HF Band 1 (2.5 watts.)
26 HF1-L2 20 This sets the RF output power in the L2 power setting for HF Band 1 (1 watt.)
27 HF1-L1 21 This sets the RF output power in the L1 power setting for HF Band 1 (0.5 watts.)
28 HF2-HI 22 Same as HF1-HI except for HF Band 2.
29 HF2-L3 23 Same as HF1-L3 except for HF Band 2.
30 HF2-L2 24 Same as HF1-L2 except for HF Band 2.
31 HF2-L1 25 Same as HF1-L1 except for HF Band 2.
32 HF3-HI 26 Same as HF1-HI except for HF Band 3.
33 HF3-L3 27 Same as HF1-L3 except for HF Band 3.
34 HF3-L2 28 Same as HF1-L2 except for HF Band 3.
35 HF3-L1 29 Same as HF1-L1 except for HF Band 3.
36 50M-HI 2A Same as HF1-HI except for the 50 MHz Band.
37 50M-L3 2B Same as HF1-L3 except for the 50 MHz Band.
38 50M-L2 2C Same as HF1-L2 except for the 50 MHz Band.
39 50M-L1 2D Same as HF1-L1 except for the 50 MHz Band.
40 VHF-HI 2E Same as HF1-HI except for the VHF Band.
41 VHF-L3 2F Same as HF1-L3 except for the VHF Band.
42 VHF-L2 30 Same as HF1-L2 except for the VHF Band.
43 VHF-L1 31 Same as HF1-L1 except for the VHF Band.
44 UHF-HI 32 Same as HF1-HI except for the UHF Band.
45 UHF-L3 33 Same as HF1-L3 except for the UHF Band.
46 UHF-L2 34 Same as HF1-L2 except for the UHF Band.
47 UHF-L1 35 Same as HF1-L1 except for the UHF Band.
48 HF1TXG 36 This sets the gain of the transmit IF for HF Band 1.  This is done by adjusting bias current on D1017.  Lower value = Lower TX IF gain.
49 HF2TXG 37 This is the same as HF1TXG except for HF Band 2.
50 HF3TXG 38 This is the same as HF1TXG except for HF Band 3.
51 50MTXG 39 This is the same as HF1TXG except for the 50 MHz Band.
52 VHFTXG 3A This is the same as HF1TXG except for the VHF Band.
53 UHFTXG 3B This is the same as HF1TXG except for UHF Band.
54 HF1POM 3C This calibrates the RF Power meter for HF Band 1.
55 HF2POM 3D This calibrates the RF Power meter for HF Band 2.
56 HF3POM 3E This calibrates the RF Power meter for HF Band 3.
57 50MPOM 3F This calibrates the RF Power meter for 50 MHz band.
58 VHFPOM 40 This calibrates the RF Power meter for VHF Band.
59 UHFPOM 41 This calibrates the RF Power meter for UHF Band.
60 ALC1-M 42 This is believed to be a no-signal calibration setting for the ALC Meter.
61 ALC-M 43 This is believed to be a signal-reference calibration setting for the ALC meter.
62 HF1-RV 44 This adjusts the sensitivity of the reverse-power detector for purposes of VSWR protection for HF Band 1.  The higher the number, the less sensitive the ‘817 appears to be in response to high-VSWR (i.e. higher power under high VSWR conditions.)
63 HF2-RV 45 The same as HF1-RV, except for HF Band 2.
64 HF3-RV 46 The same as HF1-RV, except for HF Band 3.
65 50M-RV 47 The same as HF1-RV, except for the 50 MHz Band.
66 VHF-RV 48 The same as HF1-RV, except for the VHF Band.
67 UHF-RV 49 The same as HF1-RV, except for the UHF Band.
68 CW-CAR 4A This sets the level of the keyed CW carrier.  Lower value = Lower power
69 AM-CAR 4B This sets the level of the AM carrier.  This is typically set for a carrier level 6db below that of the peak power output.  Lower value = Lower Power
70 DEV-W 4C This adjusts the gain to the Frequency modulator in the “Normal” FM transit mode to adjust the clipped (peak) deviation level – typically +- 5 KHz.  (Note:  This is not the same as FM-MIC gain and should not be treated as such!)  Lower value = Lower peak deviation.
71 DEV-N 4D This adjusts the gain to the Frequency modulator in the “Narrow” FM transmit mode to adjust the clipped (peak) deviation level – typically +- 2.5 KHz.  (Note:  This is not the same as FM-MIC gain and should not be treated as such!)  Lower value = Lower peak deviation.
72 M-MTR 4E This calibrates the sensitivity of the MOD meter.
73 CTCSS 4F This sets the amount of deviation provided by the CTCSS (subaudible) tone – typically +-700 Hz or so.  Lower value = Lower deviation.
74 DCS 50 This sets the amount of deviation provided by the DCS (Digital Coded Squelch) code – typically +-700 Hz or so.  Lower value = Lower deviation.
75 LSB-CP 51 This sets the center of the passband of the SSB filter in the LSB mode for both receive and transmit.
76 USB-CP 52 This sets the center of the passband of the SSB filter in the USB mode for both receive and transmit.

 

Number 5 for the 2 meterband will increase sensitivity while increasing he numbers; Default setting / 79.

To leave the FT 817 hidden menu just push and holf the F function .

We decline any responsibility of using this FT 817 hidden menu. We believe this should be used only if you know what you’re doing. Please share any results you get with us on the FORUM

If you want more informations please visit these LINKS
KA7OEI page – best resource for YAESU FT 817 mods
MODS for YAESU FT 817 – another resource for you.

 

 

73 de IZ0JOJ Antonio

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