[Elecraft] KX1 Rotary Encoder spare

[Paul Jewell]

Hi Dave,

Many thanks for this information. Looking at the part number, it looks 
like I can get it from DigiKey here in the UK. The only query I have is 
regarding the pulses per revolution rating. The Elecraft handbook for 
the KX1 indicates 80 PPR, but all the examples, including the one you 
are using are 30 PPR or less. I guess this still works, but needs more 
rotation of the dial for the same movement? As you have been using this 
DigiKey part, I assume there is no issue with this, and I will go ahead 
with ordering. Perhaps I am reading the handbook incorrectly!

Thanks also to Jack and William for their replies and feedback - it is 
much appreciated!

73,
Paul
MW7PAJ

On 25/03/2026 15:47, Dave Van Wallaghen wrote:
> Hi Paul,
>
> I do the service for the KX1 through my company W8FGU Services, LLC 
> and for Elecraft. I found a good supply of those through DigiKey. 
> Their part number is PEC11R-4015F-S0018. It is an exact match and I've 
> been using them for a couple of years now. Hopefully you can source 
> one over there. If not, it is our part number E640018.
>
> 73,
> Dave, W8FGU
>
>
>
> On 3/25/2026 11:19:13 AM, "Jack Brindle via Elecraft" 
> <elecraft at mailman.qth.net> wrote:
>
>> Paul;
>> Contact tech support. The same part was used in the K3 for the four 
>> controls just to the left of the big knob. The original part was from 
>> CUI Stack, part number AEC11BR4E-15FD1. That appears to no longer be 
>> available, and CUI Stack has renamed themselves as SameSky. There 
>> _may_ be a part available from both Digikey and Mouser with part 
>> number ACZ11BR4E-15FD1-20C. The _may_ is critical here - be sure to 
>> take a really goo look at this part before ordering it. There may be 
>> difference (including how it mounts) that will make if difficult to 
>> use in place of the original.
>> Again, talk to Elecraft tech support. They may have a better solution.
>> As always, please let us know what you find.
>> 73,
>> Jack, W6FB
>>> On Mar 25, 2026, at 7:59 AM, Paul Jewell via Elecraft 
>>> <elecraft at mailman.qth.net> wrote:
>>> Good afternoon all,
>>> I am looking for a spare rotary encoder for my KX1 - the existing 
>>> unit is now erratic, and ready for replacement.
>>> I am in the UK, but have friends in Europe if that is easier. I have 
>>> also written to Lutz, in case they have spares but I am covering all 
>>> my bases.
>>> Do any of you have a spare you are prepared to sell, or do you know 
>>> the OEM part number (rather than the Elecraft one)? It seems 80 PPR 
>>> encoders are not common.
>>> I believe it is possible to split the housing and clean it, but 
>>> looking at it, I don't think that would be easy!
>>> Many thanks!
>>> 73,
>>> Paul
>>> MW7PAJ
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