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.NameMemory address (HEX)Description
01HF1RXG7IF 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.)
02HF2RXG8The same as HF1RXG, except that it adjusts the IF gain setting for HF band 2 (2.5-<10.5 MHz.)
03HF3RXG9The same as HF1RXG, except that it adjusts the IF gain setting for HF band 3 (10.5-<33.0 MHz.)
0450MRXGAThe same as HF1RXG, except that it adjusts the IF gain setting for the “50 MHz” band (33.0-56.0 MHz.)
05VHFRXGBThe same as HF1RXG, except that it adjusts the IF gain setting for “VHF” (108.0-154.0 MHz.)
06UHFRXGCThe same as HF1RXG, except that it adjusts the IF gain setting for UHF (420.0-470.0 MHz.)
07SSB-S9DThis adjusts the amount of signal required for an S-9 reading in the AM/SSB/CW modes on all bands.
08SSB-FSEThis sets the amount of signal required for a full-scale reading in the AM/SSB/CW modes on all bands.
09FM-S1FThis 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.)
10FM-FS10This 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.)
11DISC-L11This 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.)
12DISC-H12This 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.)
13FM-TH113This is believed to set the “bottom end” of the squelch range threshold.
14FM-TH214This is believed to adjust the amount of hysteresis in the squelch response.
15FM-TI115The 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.)
16FM-TI216The 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.)
17VCC17This 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.
18HF1-IC18This 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.
19HF2-IC19The same as HF1-IC except that it applies to the HF band 2.
20HF3-IC1AThe same as HF1-IC except that it applies to the HF band 3.
2150M-IC1BThe same as HF1-IC except that it applies to the 50 MHz band.
22VHF-IC1CThe same as HF1-IC except that it applies to the VHF band.
23UHF-IC1DThe same as HF1-IC except that it applies to the UHF band.
24HF1-HI1EThis sets the RF output power in the HI power setting for HF Band 1 (5 watts.)  Lower value = Lower power.
25HF1-L31FThis sets the RF output power in the L3 power setting for HF Band 1 (2.5 watts.)
26HF1-L220This sets the RF output power in the L2 power setting for HF Band 1 (1 watt.)
27HF1-L121This sets the RF output power in the L1 power setting for HF Band 1 (0.5 watts.)
28HF2-HI22Same as HF1-HI except for HF Band 2.
29HF2-L323Same as HF1-L3 except for HF Band 2.
30HF2-L224Same as HF1-L2 except for HF Band 2.
31HF2-L125Same as HF1-L1 except for HF Band 2.
32HF3-HI26Same as HF1-HI except for HF Band 3.
33HF3-L327Same as HF1-L3 except for HF Band 3.
34HF3-L228Same as HF1-L2 except for HF Band 3.
35HF3-L129Same as HF1-L1 except for HF Band 3.
3650M-HI2ASame as HF1-HI except for the 50 MHz Band.
3750M-L32BSame as HF1-L3 except for the 50 MHz Band.
3850M-L22CSame as HF1-L2 except for the 50 MHz Band.
3950M-L12DSame as HF1-L1 except for the 50 MHz Band.
40VHF-HI2ESame as HF1-HI except for the VHF Band.
41VHF-L32FSame as HF1-L3 except for the VHF Band.
42VHF-L230Same as HF1-L2 except for the VHF Band.
43VHF-L131Same as HF1-L1 except for the VHF Band.
44UHF-HI32Same as HF1-HI except for the UHF Band.
45UHF-L333Same as HF1-L3 except for the UHF Band.
46UHF-L234Same as HF1-L2 except for the UHF Band.
47UHF-L135Same as HF1-L1 except for the UHF Band.
48HF1TXG36This 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.
49HF2TXG37This is the same as HF1TXG except for HF Band 2.
50HF3TXG38This is the same as HF1TXG except for HF Band 3.
5150MTXG39This is the same as HF1TXG except for the 50 MHz Band.
52VHFTXG3AThis is the same as HF1TXG except for the VHF Band.
53UHFTXG3BThis is the same as HF1TXG except for UHF Band.
54HF1POM3CThis calibrates the RF Power meter for HF Band 1.
55HF2POM3DThis calibrates the RF Power meter for HF Band 2.
56HF3POM3EThis calibrates the RF Power meter for HF Band 3.
5750MPOM3FThis calibrates the RF Power meter for 50 MHz band.
58VHFPOM40This calibrates the RF Power meter for VHF Band.
59UHFPOM41This calibrates the RF Power meter for UHF Band.
60ALC1-M42This is believed to be a no-signal calibration setting for the ALC Meter.
61ALC-M43This is believed to be a signal-reference calibration setting for the ALC meter.
62HF1-RV44This 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.)
63HF2-RV45The same as HF1-RV, except for HF Band 2.
64HF3-RV46The same as HF1-RV, except for HF Band 3.
6550M-RV47The same as HF1-RV, except for the 50 MHz Band.
66VHF-RV48The same as HF1-RV, except for the VHF Band.
67UHF-RV49The same as HF1-RV, except for the UHF Band.
68CW-CAR4AThis sets the level of the keyed CW carrier.  Lower value = Lower power
69AM-CAR4BThis 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
70DEV-W4CThis 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.
71DEV-N4DThis 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.
72M-MTR4EThis calibrates the sensitivity of the MOD meter.
73CTCSS4FThis sets the amount of deviation provided by the CTCSS (subaudible) tone – typically +-700 Hz or so.  Lower value = Lower deviation.
74DCS50This sets the amount of deviation provided by the DCS (Digital Coded Squelch) code – typically +-700 Hz or so.  Lower value = Lower deviation.
75LSB-CP51This sets the center of the passband of the SSB filter in the LSB mode for both receive and transmit.
76USB-CP52This 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