Category: Mods

Elecraft KX3 and 27 mhz (CB band)

Elecraft KX3 and 27 mhz (CB band)

Elecraft KX3 and 27 mhz (CB band)

Hello everybody,
somebody can turn up his nose if we talk of the best SDR transceiver that we want able to transmit on the 27MhZ (CB Band). Well, it’s true. We can use a simple 100$ Citizen Band transceiver – and enjoy it but… the first love will always be for ever! I believe 90% of us had first ham radio QSO on 27.555 MhZ – USB. At the end of the day, we happy user of KX3, would like to have the opportunity to transmit on the CB band / 11 meters band!

CB band SSB
CB band SSB transceiver

I did a quick search on internet to look for mods for our Elecraft KX3 to be able to transmit on 27 MhZ (CB band). The best would be to find mods for wide band transmitting. This is what I’ve found for you.

It seems there is a “widebander software tool” that is able to do the job…  (expanding the bands but except the 27 Mhz band). Just look for it on the net.

The best thing to do is to contact the Elecraft support team as I did:
You can (or at least, used to be able to) ask Elecraft for the K3 MARS TX unlock software. Here is the information received from Elecraft:
—————————————————-
“Please find hereby attached the software to remove the TX Band limit and you’ll be able to work MARS frequencies. It is upon to the radioamateur to make sure he’s operating in conformity of law over the authorized frequencies. We cannot be held responsible for any unauthorized operation.

Please note that CB band is blocked for transmit at high power. It will not engage the KPAxx on this band. You can transmit. Only at low power (10-12watts). Do not forget to share with us your mod if you’ve found one! If you like to have more link / video please send down your comment. We, Elecraft KX3 users, would like to have a open band transceiver! 🙂 PLEASE, ELECRAFT, let us do the mod 🙂 It should be easy for everyone. It looks like somebody did it and he is able to transmit on the citizen band. . .only 5 watts yes, but this OM did a great job (we cannot tell more but …you can go here): click down here on the arrow.

Thanks
Best regards

Maximizing battery life of Elecraft KX3 QRP

Maximizing battery life of Elecraft KX3 QRP

Maximizing battery life of Elecraft KX3 QRP

Battery life can be improved by minimizing the KX3’s receive and
transmit current drain.

Receive

The KX3 already has far lower receive-mode current drain than most all-
band/all-mode transceivers, but you can further reduce it in several
ways:

– use headphones (10-100 mA saved depending on volume level)
– turn off the LCD backlight (25 mA)
– turn off the RX I/Q port when not needed (10 mA; see MENU:RX I/Q)
– turn off the preamp (5 mA saved for the 20 dB preamp,
10-15 mA for the 10-dB preamp)
– turn off the RX isolation amp (10-15 mA; see MENU:RX ISO)

Using all of the above techniques, receive-mode current drain can be
as low as 150 mA, varying a bit per-band.

Transmit

In transmit mode, current drain varies with power level, supply
voltage, band, and load impedance. An antenna tuner (such as the
internal KXAT3 option) can help ensure the transmitter sees a good
match.

There are some thresholds where the transmit current drain is
automatically reduced by switching in a higher-impedance PA output
transformer winding. In this case a decimal point is added to the
right of the power display when you adjust it (e.g., “3.0 W.”). Here
are the conditions under which TX current is reduced:

1.  5.0 W or less in CW, FSK-D, and FM modes when key-down supply
voltage is 11 V or higher

TX current in this case is typically 1 amp — about 50% lower than
what you’ll see if you move power just a bit above 5.0 W. This is
especially useful for QRP Field Day outings (etc.) where the rig is
powered from an external 12 to 14 V battery.

2.  3.0 W or less in all modes, regardless of supply voltage

This is the generally recommended power level when operating from an
internal NiMH battery pack. If you’re more interested in power output
than operating time, you can run up to 5 watts from the internal
battery.

Elecraft kx3 transceiver tips, mods & hints

Elecraft kx3 transceiver tips, mods & hints

Elecraft kx3 transceiver tips, mods & hints

Elecraft kx3 transceiver

1st TIP: How to save battery power.
Use 5.0 watts or less when running from a 12-V source, and 3.0 watts or less when running from an 8-10 V source (including the 8x AA batteries). At these levels, the elecraft KX3 transceiver automatically switches the power amplifier to a more efficient setting. You can tell that power-saving mode is in effect by a decimal point after the ‘W’ in the power value (e.g., “5.0 W.”). Why not to use headphones rather than the internal speaker? You can save other precious mAh during reception (around 80 mAh) and , also, if you can …turn off the LCD backlight (Menu: BKLIGHT). The current drain of the Elecraft KX3 is around 1.20 Amps on transmit with 5 watts out. See the video clicking on the arrow down
elecraft kx3 tips, damage, how to, repair, finals, better modulation, QRP, sota, mountain, repair display
elecraft k3, price, sell, craigslist, eBay, 
2nd TIP. Isolate the oscillator.The elecraft KX3 transceiver, like other radios with a quadrature direct-conversion architecture, uses a VFO (local oscillator) running at or very close to the operating frequency. If you have another radio on the same band as the KX3, and the antennas are close together, the other radio may be able to hear the KX3’s oscillator when they’re both tuned to the same frequency.To prevent this, the KX3 includes an isolation amplifier that keeps the oscillator from radiating back through the mixer. Normally this amplifier is turned off to save about 15 mA of receive-mode current drain. To turn on the isolation amp, set MENU:RX ISO to ON. This has no effect on performance.

3rd tip: going portable? Get a lipo for your Elecraft KX3 transceiver
There are many kind of LiPo batteries and these are a great addition to my elecraft KX3 transceiver package. A fully charged 3S LiPo battery is around 12.6 volts. You can use your QRP KX3 @ 10 watts output power with this battery for the entire afternoon! Down here there is a nice video on operating tips (Elecraft KX3 transceiver) click on the arrow!!!

Elecraft kx3 transceiver best battery
Here you can find all the lipo you want:
Http://www.hobbyking.com

 4th tip – On Automatic Antenna Tuner (ATU) 
“Try harder” ATU mode – N6KR reports that having tossed about 25′ of wire in a tree and laid another 25′ on the ground,  the ATU would tune close to 1.0:1 on 60-6 meters, except for 17 meters, where it was 1.9:1. Even though 1.9:1 is an acceptable SWR, a lower SWR can sometimes be obtained by allowing the ATU to try more LC combinations.
To do this, simply tap ATU TUNE a second time within 5 seconds of the first match attempt.
In his case, a 1.0:1 match was found on the second try.Clearing out old LC data. The KX3 stores ATU LC data for many segments on each band. The LC data required to match a home antenna system is often quite different from what is needed to match a field antenna. So when operating in the field, you may find that clearing all of the LC data for each band used can save a lot of re-tuning time. This is done by locating the ATU MD menu entry, then holding CLR (a switch function of the RIT offset control). Then exit the menu. 
The ATU will use the LC data from the closest segment that you’ve tuned, so when setting up a new antenna, you can tune up in as little as one spot (if the antenna is broadband) or as often as within every segment. Segments are on 20-kHz boundaries on most bands (5 kHz on 160 m).

Down here there is a nice video on operating tips (Elecraft KX3 transceiver) click on the arrow!!!


114837-magic-marker-icon-arrows-arrow11-right

 

Yaesu FT 817 Modifications – Tips and hints

Yaesu FT 817 Modifications – Tips and hints

There are many ham radio modifications for our Yaesu FT 817 ND available on internet.

BATTERY life
One of the problems with the Ft 817 is the  poor battery life, particularly using the normal NiMH pack with 1,400mAH capacity that YAESU provide. One solution is offered by VK3YY. He proposed to use a Lithium Polymer battery . Hobbyking have this lipo battery that is a good fit inside the FT-817.  The pack is a bit narrower than the original NiMh pack and about 50 grams lighter at 150 grams.  The capacity at 2500mAh is significantly more than the original pack.  The price is around 20 $ plus postage. (See photo – perfectly fit inside!)

FT817 PA Failure

It seems that I am not the only radio amateur to have the PA on my FT817R fail without warning or provocation. It seems that the older FT817R’s were prone to sudden PA failure and that this may be linked to a problem with self-oscillation of the power amplifier stage resulting in its destruction. The PA is driven hard on 2 metres and 70cm as the gain of the devices is lower. This might not help much either, in terms of PA life. Click down here for the video-link.

When the PA is replaced, there is apparently a Yeasu factory modification that is done to the final stage PA circuitry to improve reliability.

cropped-ft818-e1407095442414.jpg

RN3AUQ write us another modification about
” How to improve FT 817 receiver “

The source of receiver noise is 2nd IF amp which is placed after the 455kHz IF filters. So, you can replace R1339 10k by 1k resistor and this will reduce total 2nd IF gain. To restore transceivers sensitivity you should boost 2nd IF local 455kHz oscillator. It can be done after replacing R1195 220k by 100k resistor and R1196 2k2 by 1k resistor. After the mod check your receiver sensitivity with RF generator and fine tune it in service menu (press A, B, C and switch power ON) items HF1RX, HF2RX, HF3RX e.t.c

” How to get 10 watts output from Yaesu ft 817 nd “

This procedure here will increase power to 10 watts on HF bands only, but ensures that the DC Over-current protection will reduce power into abnormal loads that the SWR detector cannot detect. SWR bridges are a only a compromise at detecting reflected power — that’s why Yaesu went to the effort of building in DC Over-current protection as well as high-SWR protection.  Here is the recommended procedure, you will need a Dummy Load and a Wattmeter or RF Voltmeter. Make a note of your original calibration settings so you can go back to the standard setting later — the easiest way to do this is to use FT817 Commander freeware. It is also easy to accidentally change a value by bumping the Dial knob, and you need to be able to get back to the original setting.  If you have a Key connected, set the VFO to CW on 1.8, 7 and 21 MHz bands — if you don’t have a Key, then set them to PKT and you will be able to get full carrier using Mic PTT but with no modulation going out.

Turn the radio off. Press and hold the three A, B, C buttons and press the PWR button. To change to a different Menu item turn the small SEL knob. To change the value of the item, turn the large Dial knob. Be careful not to bump the Dial knob so you don’t accidentally change settings..

1. Increase HF1-IC to 150.
2. Increase HF1-HI for an output of 14 watts – you will need at least 12 volts input.
3. Decrease HF1-IC until you get 12 watts output
4. Now set HF1-HI for 10 watts output.
5. Repeat for HF2 and HF3
You could also change HF1-L3 to 5 watts to save battery drain when 10 watts isn’t needed.
If you are using an RF Voltmeter the readings are 0.5W=5v 1W=7v 2.5W=11v 5W=16v 10W=22v 12W=24v 14=26v.
To avoid de-calibrating the Voltmeter, set your supply to 13.8 volts — otherwise if you just flick over the DC volts position (Item 17 – VCC) you will recalibrate it. To save these changed settings, hold the F button for two seconds when finished.
Click below on the arrow to go to the best link we can suggest: All the mods, modifications for our QRP radio world are here…

mods.dk website!

FT 817 hidden menu

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

Switch to 3000 mAh battery – More juice for your QRP Yaesu FT 817 ND

I’ve personally tested this new feature for our FT 817.
It is a kit that fit into your original case a LIPO 3000 mAh battery.

Lipo battery are widely used now by R/C enthusiast because of their high power to weight ratio as well as their ability to provide high current coupled with a flat discharge voltage curve. 

The WLB-817 kit replaces your FT-817 factory supplied battery tray and the custom made Charging Hatch replaces you battery door. The Charging Hatch features a an ON/OFF switch that cuts the battery off from the radio during charging or storage. The charger features a bi-color LED that indicates charge status.

Specifications

Operating Voltage Charged 12.6V Nominal 11.6V 
Charger 100-240VAC Input 12.8VDC Output
Minimum Voltage 9V
Charge Time 4 Hours
Discharge Current 2.5A Max
Charging Specs 12.6V @ 1.2A 

 

WLB-817 Basic Kit Includes LiPo Battery, Charger and Hatch         $75  

 

http://www.hamsource.com/WLB-817.html

Video of the installation

 

73 de IZ0JOJ

How to increase power of FT 817 ND to 10 watts

How to increase power of FT 817 ND to 10 watts

Also called “the golden screwdriver syndrome“, we receive and publish this mod:

This procedure here will increase power to 10 watts on HF bands only, but ensures that the DC Over-current protection will reduce power into abnormal loads that the SWR detector cannot detect. SWR bridges are a only a compromise at detecting reflected power — that’s why Yaesu went to the effort of building in DC Over-current protection as well as high-SWR protection.

Here is the recommended procedure, you will need a Dummy Load and a Wattmeter or RF Voltmeter. Make a note of your original calibration settings so you can go back to the standard setting later — the easiest way to do this is to use FT817 Commander freeware. It is also easy to accidentally change a value by bumping the Dial knob, and you need to be able to get back to the original setting. If you have a Key connected, set the VFO to CW on 1.8, 7 and 21 MHz bands — if you don’t have a Key, then set them to PKT and you will be able to get full carrier using Mic PTT but with no modulation going out.

Turn the radio off. Press and hold the three A, B, C buttons and press the PWR button. To change to a different Menu item turn the small SEL knob. To change the value of the item, turn the large Dial knob. Be careful not to bump the Dial knob so you don’t accidentally change settings..
1. Increase HF1-IC to 150.
2. Increase HF1-HI for an output of 14 watts – you will need at least 12 volts input.
3. Decrease HF1-IC until you get 12 watts output
4. Now set HF1-HI for 10 watts output.
5. Repeat for HF2 and HF3
You could also change HF1-L3 to 5 watts to save battery drain when 10 watts isn’t needed.
If you are using an RF Voltmeter the readings are 0.5W=5v 1W=7v 2.5W=11v 5W=16v 10W=22v 12W=24v 14=26v.
To avoid de-calibrating the Voltmeter, set your supply to 13.8 volts — otherwise if you just flick over the DC volts position (Item 17 – VCC) you will recalibrate it.
To save these changed settings, hold the F button for two seconds when finished”

Check out this Youtube video

The QRP world note:
We don’t believe this is a useful mod. This mod will strongly change your board circuit. Ham radio operators that did this mod, said voice modulation, especially in AM/FM changed and was distorced. We, therefore, don’ t recommend this modification. You can use this excellent and portable QRP amplifier for YAESU FT 817 ND that we already reviewed for you. Do not miss the opportunity to talk and discuss of this in our forum.
We are looking for other mods for the YAESU FT 817 ND – please – If you like to have more mods and how to increase the power on your YAESU FT 817 please click down here on the arrow

 

 

If you are aware of any other mod please write us!

Best 73

Wideband coverage mods for our FT 817 QRP RADIO

Once upon time, with older models it was easy to open all the bands using a software (widebander.exe) but now you need to open your radio and perform this modification manually.

Guide to widebanding

“First remove the battery and disconnect the radio from any power source. 

Next remove the top and bottom covers.

Looking at the front of the radio there are 2 clips on the top and 2 on the bottom.

Ease these clips free of the main body of the radio and slide the front panel off (don’t overstretch the ribbon cable).

Next unclip the ribbon cable from the main body of the radio.

Now the front panel should come free and you can then see the jumper positions”

If you look at the inside of the front panel you see 9 jumpers at the top. Some of the jumpers are soldered closed and some are still open.

To wideband the radio you have to change the configuration of these jumpers.

This is how the jumpers looked in a newly bought FT-817 ND version:
OXOXXOOOO

You need to solder the jumpers like this: XXXXOOOOO

After doing this modification you need to reset the FT 817 :

– press and hold the “F” and “V/M” buttons and then press “power on” to reset the FT-817 and make the mod active.