Vince,
I have repaired several 5400 rotators (I no longer own one). The pot can often be repaired. There is a small wire connecting the center of the pot to the solder lug (this will make sense when you see it). The wire twists
as the pot and rotator rotate. It will often fail at the solder joint making intermittent contact causing the position indication to jump and/or have dead zones. Replace the small wire and it will work another 10 years or so.
They are not the same pots being used in the 5500. The AC version of the 5500 uses a more traditional looking pot. They are both 500 Ohm wirewound pots. I have not been inside the even newer 5500DC.
The last time I called (long ago) Yaesu was still willing to sell either. An exact replacement is available for the pot in the 5500 on eBay for less money, but you have to wait for shipping. Feel free to reply and I will
dig up the link.
It is possible to substitute a ‘standard’ 500 Ohm pot into the 5500. The one in the 5400 is a little more unique.
73,
Joe kk0sd
From: mikflathead--- via AMSAT-BB <amsat-bb@amsat.org>
Sent: Wednesday, January 18, 2023 6:46 PM
To: amsat-bb@amsat.org; vlfiscus@mcn.net
Subject: [AMSAT-BB] Re: Yaesu 5400b azimuth potentiometer
Isn't the azimuth rotor something they still make. 800 model? Mike
-----Original Message-----
From: Jim_WØNBC via AMSAT-BB <amsat-bb@amsat.org>
To: Vince Fiscus, KB7ADL <vlfiscus@mcn.net>;
amsat-bb@amsat.org
Sent: Wed, Jan 18, 2023 7:13 pm
Subject: [AMSAT-BB] Re: Yaesu 5400b azimuth potentiometer
Call Yaesu parts and check.
Phone number I have is
Yaesu Tech Help
(714) 827-7600
Hope this helps.
Jim, W0NBC
Sent from Yahoo Mail for iPhone
On Wednesday, January 18, 2023, 5:51 PM, Vince Fiscus, KB7ADL via AMSAT-BB <amsat-bb@amsat.org> wrote: