[Elecraft] 10 MHz external reference

[Don Wilhelm]

Hank,

It needs to be 10 MHz and very stable.
If it is not right on 10 MHz, it will still lock, but the K3 frequency 
will be off as much as the reference is different than 10 MHz.

73,
Don W3FPR

On 3/9/2016 10:49 PM, HankP wrote:
> As a casual observer of this thread - does the oscillator have to be
> precisely 10 mhz to a zillion decimal places  OR does it just need
> to be close to 10 mhz and verrrrrryyyyy stable ?
>
> Years ago hams used to build 10 mhz xtal
> oscillators/buffers  - put them in  a thermos bottle - dig a post hole
> and bury the thing about 4 feet deep - it was pretty stable
> just xtal aging and needed lo noise stable DC.
>
>