Hi
I would try a piece of electrical tape instead of the knot.

God bless
Mark

God loves you!
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Sent From my iPhone 5

> On Mar 29, 2014, at 5:53 AM, "Mike Duke, K5XU" <[log in to unmask]> wrote:
> 
> I have used a knot too, but that doesn't work as well for 
> heavier gage leads.
> 
> 
> 
> ----- Original Message ----- 
> From: "David W Wood" <[log in to unmask]>
> To: "'Mike Duke, K5XU'" <[log in to unmask]>
> Sent: Saturday, March 29, 2014 5:21 AM
> Subject: RE: Tactile Marking for Power Leads
> 
> 
> Mike
> 
> I have used a similar method since 1973 when working in an 
> electronics lab,
> but even simpler!
> 
> I tie a knot in the positive.
> This has the advantage, when using flat connectors, that 
> they lay flat on
> the front of the power supply.
> 
> 73
> 
> David W Wood
> 
> -----Original Message-----
> From: For blind ham radio operators 
> [mailto:[log in to unmask]]
> On Behalf Of Mike Duke, K5XU
> Sent: Saturday, March 29, 2014 10:09 AM
> To: [log in to unmask]
> Subject: Tactile Marking for Power Leads
> 
> A long time ago, I began marking the positive lead of all of
> my equipment. At first I did this by wrapping a twist tie
> around it. Now, I use a small zip tie that is pulled tight
> around the lead an inch or two behind the ring terminal or
> whatever is on the end of it, and then cut off as close to
> the fastener as possible. This gives me an easy tactile
> indication of the positive lead should it be necessary to
> remove or re-attach it when there are no working eyes
> around.
> 
> By only marking the positive lead on each power cable, you
> know which lead is in your hand when your at the power
> supply end of the cable.
> 
> Every ham, blind or not, should do this.
> 
> Mike Duke, K5XU
> American Council of Blind Radio Amateurs