[HBR] 50Khz IF Transformer fior new Build

[B. Smith]

Be sure an choose your oscillator frequency carefully due to possible 
local AM broadcast.
When using an IF that is different then published you can expect a few 
"birdies" and you will have to change the mixer injection crystal. So 
you may want to do the math first.
http://k4che.com/HBR/Testing/Progress%20Testing%20pg%201.htm

On 1/13/2014 10:18 AM, Steve wrote:
> I am in the process of gathering parts and I have been dealing with trying
> to find IF Transformers.   I have quite a few 265Khz ones that will need
> modifications, 5 ea  85Khz ones from an ARC 5  and some 50Khz ones from a
> junker National NC300.  So the big question for me is which sets should I
> use?  Modifications of the 265 is quite a task, so it seems to come down to
> using the 85Khz ones whihc there is plenty written about how to do that or
> use the 50Khz ones from the National.  Any reason that I should not use the
> 50 Khz ones, understanding that I have to make a few changes in the
> oscillator frequencies...The 50 Khz ones would be easy to use and mount on
> the chassis.  This the last major hurdle for parts that I have.
>   
> Steve NU0P
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