Today's Message Index:
----------------------
1. 04:41 AM - Re: Pin curious (Robert L. Nuckolls, III)
2. 05:50 AM - Re: Antenna position (Bill Steer)
3. 05:51 AM - Re: Antenna position (Bill Steer)
4. 07:48 AM - Re: Antenna position (Robert L. Nuckolls, III)
5. 01:49 PM - Re: Antenna position (Bill Steer)
Message 1
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At 10:32 PM 11/11/2018, you wrote:
>I'm wiring up a CAN Bus for a Garmin G3X system the
>Garmin-recommended way by soldering a short pigtail to the two CAN
>HI wires and another to the two CAN LO wires as they pass by a
>device. It got me curious about pins. Are the machined, 4-crimp pins
>really that superior to the stamped sheet metal ones?
'that superior' isn't quantified.
I don't think any open barrel d-sub
pins have made it to a 'qualified
products list' for military procurement.
At the same time, millions of miles
of wiring in all manner of over-the-road
vehicles has been terminated in open-barrel
pins for decades. I don't think you'll find
a machined pin called out in any
vehicle's bill of materials.
The bottom line for BOTH technologies
is driven by tooling and craftsmanship.
Applied with adequate tools and skill,
the two technologies are essentially
interchangeable.
Bob . . .
Message 2
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| Subject: | Re: Antenna position |
It's fabric over aluminum tube. The ground plane is a sheet of 0.032"
aluminum, 17" x 17".
On 11/11/2018 10:04 PM, Robert L. Nuckolls, III wrote:
>>
>> I'm building an Excalibur. There doesn't appear to be any place
>> on top for a VHF antenna, so I'm putting it on the bottom, under
>> the front seat. The Excalibur has short legs, so I'm using the
>> 90 degree antenna from ACS. The question is - where should this
>> antenna be positioned on the relatively small ground plane - with
>> the connection in the center of the ground plane, or with the
>> connection near the front of the ground plane so the majority of
>> the trailing antenna is directly under the ground plane?
>>
>
> Is that fabric over steel-tube? What is the
> nature of your 'ground' plane. Is it off center
> between the keel and first outboard stringer?
>
>
> Bob . . .
>
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Message 3
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| Subject: | Re: Antenna position |
Oh, and it's centered between the lower stringers.
do not archive
On 11/11/2018 10:04 PM, Robert L. Nuckolls, III wrote:
>>
>> I'm building an Excalibur. There doesn't appear to be any place
>> on top for a VHF antenna, so I'm putting it on the bottom, under
>> the front seat. The Excalibur has short legs, so I'm using the
>> 90 degree antenna from ACS. The question is - where should this
>> antenna be positioned on the relatively small ground plane - with
>> the connection in the center of the ground plane, or with the
>> connection near the front of the ground plane so the majority of
>> the trailing antenna is directly under the ground plane?
>>
>
> Is that fabric over steel-tube? What is the
> nature of your 'ground' plane. Is it off center
> between the keel and first outboard stringer?
>
>
> Bob . . .
>
---
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Message 4
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| Subject: | Re: Antenna position |
At 07:50 AM 11/12/2018, you wrote:
>Oh, and it's centered between the lower stringers.
Okay, you'll need to beef it up structurally. Given
the flexibility of the .032 I think I'd add a doubler
of .062 and 6 x 6 or more.
You could bond it to the .032 with something
like E6000. It only needs to have electrical
integrity to the .032 in proximity to the
area under the antenna mounting. Is the antenna
a one-holer or flanged base?
Bob . . .
Message 5
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| Subject: | Re: Antenna position |
The antenna is a one-holer, Bob.
Bill
On 11/12/2018 10:47 AM, Robert L. Nuckolls, III wrote:
> At 07:50 AM 11/12/2018, you wrote:
>
>> Oh, and it's centered between the lower stringers.
>
> Okay, you'll need to beef it up structurally. Given
> the flexibility of the .032 I think I'd add a doubler
> of .062 and 6 x 6 or more.
>
> You could bond it to the .032 with something
> like E6000. It only needs to have electrical
> integrity to the .032 in proximity to the
> area under the antenna mounting. Is the antenna
> a one-holer or flanged base?
>
>
> Bob . . .
>
---
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