[Elecraft] U10 on RF board SA602AN and SA612AN

[Eric Swartz WA6HHQ - Elecraft]

As noted in the manual (somewhere :^) the '602 and '612 are interchangeable for
our use in the K2 and K1. There is no measurable difference in performance the
way we have used them.

73, Eric  WA6HHQ
======


"Nick F." wrote:
> 
> Dear People;
> 
> Just received K-2 Kit serial number 02739,
> am doing inventory and have a question please;
> 
> I received a SA602AN and SA612AN for
> part numbers U10,U11 on the RF board of a K-2,
> instead of two SA602AN IC's.
> 
> At the following URL it says the conversion gain
> of the 612 at 45 Mhz is lower (I don't know what
> that means...signal attenuation?).  Should I simply
> use the two different IC's (if so, which one goes
> in U10 and which in U11) or contact Elecraft
> for a replacement of the SA612?  I am not sure
> if it's intentional or not that they sent similar/different
> IC's?  They are nearly, but not, identical.
> 
> http://www.cpinternet.com/~lyle/proto/LFproto.htm
> 
> " There is another part called the SA612, which
> replaces the corresponding NE612, and has essentially
> the same specifications as the SA602 except that the
> claimed conversion gain at 45 MHz is slightly lower.
> Other than that, I can't see any difference except for price "
> 
> Thank you very much.  Sincerely,
> -Nick
> 
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