[sdiy] JH Frequency shifter and patch cables

[GRAHAM ATKINS]

Hi David,

Don't get mixed up with "screened" and "co-axial" cables. Although  
they are
similar in construction they have different purposes. Screened cable  
is used
to avoid the main conductor picking up noise from surrounding  
circuitry. Co-
axial cable or TV aerial cable is made to provide a constant impedance  
match
between the aerial and transmitter / receiver (Don't worry about the  
tech stuff).
You need good screened audio cable. Do you have a local electronics  
store ?,
they should sell this sort of cable by the metre (foot for our friends  
in the US).

Graham

On Oct 4, 2008, at 23:59, David Ingebretsen wrote:

> Two questions:
>
> First, in the JH-FS1A panel connections document, it calls for  
> shielded
> cable for some connections. The variety of cable choices is a bit
> overwhelming. What type of cable does anyone recommend? Gauge? 22? 24?
> something else?
>
> I've looked at the Alpha wire, Mouser #602-2461C-1000 for the 2  
> conductor
> but have no clue if it will work well.
>
> Also, I'd rather not have to buy a 100 foot roll as I will never use a
> fraction of it. Is there a source for shorter lengths like 10 feet?
>
>
> Second, I need to make some 1/4 inch to 1/8 inch patch cables and  
> pre-made
> are quite expensive. What kind of cable makes for the best patch  
> cables?
> John Blacet has a patch cable kit with flexible coax. If I use coax,  
> what
> impedance should I go for? What gauge? Can I use the same stuff for  
> the
> patch cables as I use for the JH-FS1A?
>
> Thanks.
> David
>
>
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