#114784

Hello,

I am replacing the SEL rotary encoder on the FT-817 and want to make sure I do it without breaking anything.

What size allen key (hex wrench) do I use to undo the VFO knob? I tried using a 1.5 mm allen key but I can't loosen the screw. I don't want to apply undue force and damage something by using the wrong tool.

How do I get the knob off the SEL encoder. Do I just pull it outwards while the unit is still fully assembled? Again, I tried pulling it off with some gentle force but it didn't budge. Since the encoder is being replaced anyway I'm OK with applying more force but I want to make sure that I'm approaching this the right way.

Thanks
Ed

#114785

开云体育

Hi Ed,

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I can confirm that the 1.5 mm Allen key is the correct size. They are usually quite tight and will need a bit of force to loosen. (I just checked on mine.) Insert the short end of the key into the grub screw and use the longer end to loosen it.

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Regarding the select knob, the shaft is a D shaped one and the knob just pulls off, It may leave the metal spring section on the shaft which will need to also be removed.

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73….Eric VK2VE.

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Show quoted text

From: [email protected] <[email protected]> On Behalf Of eddy v
Sent: Monday, May 13, 2024 7:28 AM
To: [email protected]
Subject: [ft817] How to remove SEL knob and VFO knob on FT-817

?

Hello,

I am replacing the SEL rotary encoder on the FT-817 and want to make sure I do it without breaking anything.

What size allen key (hex wrench) do I use to undo the VFO knob? I tried using a 1.5 mm allen key but I can't loosen the screw. I don't want to apply undue force and damage something by using the wrong tool.

How do I get the knob off the SEL encoder. Do I just pull it outwards while the unit is still fully assembled? Again, I tried pulling it off with some gentle force but it didn't budge. Since the encoder is being replaced anyway I'm OK with applying more force but I want to make sure that I'm approaching this the right way.

Thanks
Ed

Virus-free.

#114787

Hi Eddy,
If I remember correctly, the Yaesu and most major Japanese radios use the JIS standard hex screws ( slight difference in size and taper angle). I've used the standard 1.5 on my 817ND and it came loose very easily. Sounds like yours got torqued down a bit tighter. Use at your own peril, but a drop of WD40 applied with precision should do the trick (it worked for me on a stubborn case screw.)

#114790

Eric, thanks for the suggestions. Both worked for me and I've successfully got both the knobs off.

#114791

I didn't realise that they used a JIS standard hex screw. I managed to loosen then screw with the standard 1.5 and a little more pressure. I didn't have to use WD40 but that was going to be my back up plan.