[TowerTalk] SPG is a terrible term

[Roger (K8RI)]

On 6/18/2010 10:17 AM, Tommy Alderman wrote:
> As an ex-engineer, I am not against change, but this suggestion is plain
> silly for amateur radio. Every ham understands 'Single Point Ground'
With that I respectfully disagree. It's been my experience most hams 
have an idea as to what you are talking about, but very few hams 
actually understand just what makes a good SPG.
After following a number of groups, I think the groups are made up of 
hams who are far above average in their understanding of the topics 
discussed in the groups, which is why many come to the groups/reflectors 
for information.

73

Roger (K8RI)
> and/or
> what it means. If you want to be the ham scientist or expurt or whatever,
> then you should use your own egotistical CPRBP (or whatever) and us hams
> will still use SPG. Thank you!
>
> 73,
>
> Tom - W4BQF
>
>
>
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of jimlux
> Sent: Friday, June 18, 2010 8:33 AM
> To: Towertalk Reflector
> Subject: [TowerTalk] SPG is a terrible term
>
> I think we should do away with the term "Single Point Ground"... it
> conjures up thoughts of ground rods, etc., and that's really not what
> it's all about..
>
> I can't think of a good new term, but something like "Common Potential
> Reference Bonding point" is more accurate for what we're trying to
> accomplish.
>
> And yes, that CPRBP (or whatever) should be bonded to the "earth ground"
> of the building, and most likely will also be bonded to the "Antenna
> system earth connection" (if only incidentally.... If all you have is a
> dipole, perhaps not)
>
>
> It doesn't even need to be a "single point", although it is true that
> "star" bonding tends to be better than random, multiple interconnects.
> But if you have multiple shielded cables connecting multiple boxes,
> trying to arrange perfect "grounding trees" is pretty tricky.
>
> Jim
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