[Elecraft] k2 T7 query

[Don Wilhelm]

Vic,

Yes, it is that T7, and you have the current winding ratio.  Some of the 
earlier K2s used a 13 to 4 turns ratio - I am not certain when the 
cut-over was made, but I believe it was in the low 1000 SN range.
Many of these early K2s have already been changed - I have done several 
myself while doing repairs or upgrades.

73,
Don W3FPR

VicWinton wrote:
> Hi Folks,
>
>  
>
> I am now confused..my K2 serial no 1926 from 2001 has T7 having 20turns / 5
> turns.
>
>  
>
> I just checked the latest manual and the turns are the same. Are we sure
> it's T7 we are talking about ? 
>
>  
>
> 73,   Vic GW4JUN
>
>  
>
>  
>
>   
>
> That is a very old mod (2003) and was one of the experimental things 
>
> done at that time.
>
> Since then, the T7 winding ratio has been changed and the specs on the 
>
> IF filter crystals have been modified.
>
> Currently I do not believe there is any benefit in applying that mod to 
>
> a K2.  If you have a very old K2, simply change the T7 winding to the 
>
> ratio given in the current K2 manual.
>
>  
>
>
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