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Showing results 1 to 25 of 308
Search took 0.01 seconds. Search: Posts Made By: TreblePlink
Forum: Marine Electronics 25-11-2019, 07:08
Replies: 40
Views: 7,104
Posted By TreblePlink
Re: Trying to find the perfect VHF antenna

All antennas are two terminal; a dipole works as a mostly balanced antenna and a vertical monopole works with the vertical element "against" either a ground plane or other metallic structure. For...
Forum: Marine Electronics 24-11-2019, 14:38
Replies: 40
Views: 7,104
Posted By TreblePlink
Re: Trying to find the perfect VHF antenna

1/4 wave can work fine, but most commercial mast top antennas are 1/2 wave - a bit more gain. The difference in vertical radiation pattern is not that much.
Forum: Marine Electronics 24-11-2019, 13:50
Replies: 40
Views: 7,104
Posted By TreblePlink
Re: Trying to find the perfect VHF antenna

RG-214 is certainly low loss.



But I have never heard of isolating the antenna bracket from the mast. Is there a reference advocating this? The mast and stays form part of the antenna and...
Forum: Marine Electronics 24-11-2019, 12:42
Replies: 40
Views: 7,104
Posted By TreblePlink
Re: Trying to find the perfect VHF antenna

Antenna brand or type doesn't matter much. Height is everything at VHF, so it belongs at the masthead if you want best range. As has been mentioned, most problems are connector and corrosion...
Forum: Deck hardware: Rigging, Sails & Hoisting 09-11-2019, 07:26
Replies: 4
Views: 1,329
Posted By TreblePlink
Re: Rebuilding a roller furler?

I think I can fabricate the missing and broken parts - I hope those of you with roller furler experience might add some guidance... The manufacturer supplied a user manual, but few other mechanical...
Forum: Deck hardware: Rigging, Sails & Hoisting 01-11-2019, 12:23
Replies: 4
Views: 1,329
Posted By TreblePlink
Re: Rebuilding a roller furler?

Emailed the guy at Cruising Design International, and parts are not available for what he thinks is the model R8. This thing has an integral halyard and the whole thing rotates around the stay...
Forum: Deck hardware: Rigging, Sails & Hoisting 31-10-2019, 13:18
Replies: 4
Views: 1,329
Posted By TreblePlink
Rebuilding a roller furler?

Having overshot my Rhoades 28 restoration budget already, I have to economize in a couple areas. So I now have a drum, and foils from an older roller furler. Picture below. If you are familiar with...
Forum: Training, Licensing & Certification 11-09-2018, 08:29
Replies: 148
Views: 23,705
Posted By TreblePlink
Re: Does anyone get the FCC license?

In the old days, the FCC offered the restricted permit as minimal licensing.

By examination, higher class licenses were offered, such as the 2nd class, and first class radiotelephone licenses,...
Forum: Navigation 01-07-2018, 08:07
Replies: 2
Views: 849
Posted By TreblePlink
Irma depth changes?

The Noaa photos below were taken just before and after Irma. They suggest rather extreme depth reductions. So, Florida navigators, have you seen significant new shoaling?
Forum: Plumbing Systems and Fixtures 30-06-2018, 11:57
Replies: 60
Views: 21,965
Posted By TreblePlink
Re: Corrugated hose or smooth for bilge pumps?

"The corrugations cannot reduce the flow (roverhi is right) according to hydrodynamics the flow depends only on cross-section – it is the science, period. ... "


By this logic, there would be no...
Forum: Plumbing Systems and Fixtures 30-06-2018, 10:17
Replies: 60
Views: 21,965
Posted By TreblePlink
Re: Corrugated hose or smooth for bilge pumps?

Has anybody had good luck with the flow-max ball scupper? I was going to add an additional cockpit drain (to the Lazarette which has an outboard) - but in testing it, the ball would not reliably...
Forum: Liveaboard's Forum 27-06-2018, 09:57
Replies: 67
Views: 12,069
Posted By TreblePlink
Re: Advice on re-upholstering interior cushions

I bought heavy-duty plastic zippers, but velcro might be fine ...
Forum: Liveaboard's Forum 27-06-2018, 09:21
Replies: 67
Views: 12,069
Posted By TreblePlink
Re: Advice on re-upholstering interior cushions

No - it is marketed to car upholsterers, and about $13 per yard. I wouldn't use it outside, but I think inside the cabin will be fine - Maroon to go with the Mahogany interior.
Forum: Liveaboard's Forum 27-06-2018, 07:41
Replies: 67
Views: 12,069
Posted By TreblePlink
Re: Advice on re-upholstering interior cushions

I will be using something similar to Naugahyde, which repels water and is pretty easy to clean.
Forum: Our Community 26-06-2018, 07:23
Replies: 88
Views: 45,163
Posted By TreblePlink
Re: Buying Boat Gear Just Got More Expensive

OK, so for those of us in the USA, anyone know WHEN this goes into effect?
Forum: Cooking and Provisioning: Food & Drink 25-06-2018, 10:54
Replies: 2
Views: 1,517
Posted By TreblePlink
Re: Can pressure alcohol burners be re-jeted for kerosene

The Optimus and Primus types use a nipple (orifice) with a 0.32 mm hole. I would just replace the burner assembly ...

https://www.tilleylampsandstoves.com/primus-spares
Forum: Plumbing Systems and Fixtures 25-06-2018, 05:31
Replies: 172
Views: 51,360
Posted By TreblePlink
Re: My 2 Dollar DIY Composting Head

This discussion reminds me of my original forum name, which the moderators required me to immediately change.

HuFlungDung
Forum: Boats For Sale and Wanted 21-06-2018, 13:46
Replies: 3
Want To Buy: Amel Euros
Views: 1,713
Posted By TreblePlink
Re: Amel Euros

Is that you Lizbeth ? If so, more vids please ...
Forum: General Sailing Forum 09-06-2018, 14:06
Replies: 98
Views: 19,322
Posted By TreblePlink
Re: true vs magnetic bearing

Degaussing normally refers to reducing residual magnetism in ferrous metal. For reasons already stated, this is done to ships to lessen vulnerability to certain mines. A great antenna engineer and...
Forum: Electrical: Batteries, Generators & Solar 09-06-2018, 09:50
Replies: 109
Views: 8,506
Posted By TreblePlink
Re: Is There a Point to Float with LA/Liveaboard/Solar

I suspected that most solar charging on boats lacks the power to gas the batteries much, but good to know practical experience proves it safe.

I just hope that the explosions blamed on propane...
Forum: Electrical: Batteries, Generators & Solar 09-06-2018, 08:38
Replies: 109
Views: 8,506
Posted By TreblePlink
Re: Is There a Point to Float with LA/Liveaboard/Solar

Am I right to be concerned about Hydrogen and Oxygen generation during "topping off" charging? Seems like you would never want FLA batteries to start gassing unless very well ventilated. I have...
Forum: Monohull Sailboats 09-06-2018, 07:59
Replies: 66
Views: 11,271
Posted By TreblePlink
Re: Ropes around the propeller winding the engine round (with the "stop" button on)

Because you don't want the engine to start. You are using just the starter motor.
Forum: Meets & Greets 05-06-2018, 06:40
Replies: 4
Views: 762
Posted By TreblePlink
Re: Sailing newcomer with NO experience at all

Welcome Mark!
Forum: Plumbing Systems and Fixtures 03-06-2018, 12:29
Replies: 172
Views: 51,360
Posted By TreblePlink
Re: My 2 Dollar DIY Composting Head

OK, so the liquid is the odoriferous part. How critical is the seal between the "funnel" and the milk jug hole?
Forum: Marine Electronics 03-06-2018, 12:15
Replies: 22
Views: 4,478
Posted By TreblePlink
Re: Problem with VHF reception after AIS installation

I don't think the OP has 18 feet.

Rule of thumb: two antennas (dipoles) spaced one wavelength apart, will couple together with approximately 20 dB loss.

So, assuming 7 feet horizontal spacing...
Showing results 1 to 25 of 308
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