[sdiy] JH Frequency shifter and patch cables

[JH.]

Right.
Nothing special is required for my circuits, and I'd avoid too stiff cables.
The cheapest shielded cable is an improovement over unshielded connections.
And if your wires are short, you normally don't even need a shield for 
internal wiring.

For short patch cables, I've always used the least expensive ones from 
thomann.de - I think the brand was Hosa at first, and changed later - there 
were very few faulty ones (like one in a hundred) which I just threw away, 
and that stuff is much cheaper than buying plugs and soldering cables 
myself.

JH.


----- Original Message ----- 
From: "GRAHAM ATKINS" <gatkins at blueyonder.co.uk>
To: "David Ingebretsen" <dingebre at 3dphysics.net>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, October 05, 2008 1:03 PM
Subject: Re: [sdiy] JH Frequency shifter and patch cables


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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> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
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>


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