开云体育

Hi

On my 817ND the multi function rotary encoder occasionally tunes the opposite direction and feels very loose. Can anyone recommend a suitable replacement?

Thanks & 73
Nick

Hi Nick,?
I got a replacement from yaesu, not very expensive at all.?
When changing the select pot make sure that you remove the battery before doing anything else and replace it last. It's not a hard job but take your time, the rubber buttons can be a fiddle, lots of flux and a big iron to unsolder it, a good clean up of the pads then solder the new one in.?
Andy?

Instead of the Yaesu encoder, I recently replaced my encoder with a Bourns PEC11L-4220F-S0015-ND encoder. These are 15 PPR, 30 detent encoders with a reliability rating of 100,000 cycles.

The only difference between the two encoders in practice is that the bourns encoder has a threaded housing instead of the smooth housing of the alps.

The Bourns encoder has almost 7x the rated cycles of the yaesu encoder.

Be warned: you will need a good solder sucker and be very careful not to knock off any SMD components.

Thanks, I see Digikey have the Bourns encoders. I've not dismantled the radio to inspect it yet but is it possible just to cut the decoder off it's legs then remove the legs individually? I'm not bothered about destroying the old one, rather preserving the radio PCB.

73
Nick

You cannot simply cut the legs off. The encoder has two large mounting lugs that are soldered to big copper pads on the pcb, and you cannot just cut these off without causing damage.

I highly recommend getting a plunger solder sucker. They are not expensive and they will help. I also think chipquik would help.

On 15/10/2023 00:00, Star Dos wrote:

You cannot simply cut the legs off. The encoder has two large mounting lugs that are soldered to big copper pads on the pcb, and you cannot just cut these off without causing damage.

Rubbish! Wen I replaced my worn out encoder I carefully cut all the data connections and the mounting tabs, removed the encoder then carefully removed the soldered pin remains with a small tipped iron and a pair of fine tweezers. I cleaned up the holes with desoldering braid and installed the replacement from Yaesu. Everything works perfectly now.

How did you cut the mounting legs of the encoder?

Star Dos - I found your earlier post from 2021 about this /g/ft817/message/114244. How has your replacement performed over the last two years?

I see in the 817ND service manual Yaesu have two part references for their part so I've sent a query to Yaesu UK so see how their price compares with your alternative.
S 4001 ROTARY ENCODER EC11E18244A3 Q9000750 1- A A1
S 4001 ROTARY ENCODER EC11E18244AE Q9000795 54- A A1

73
Nick

On 15/10/2023 15:54, Star Dos wrote:

How did you cut the mounting legs of the encoder?

Sharp side cutters.