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24VDC to 12VDC converters: 0V connections
Sv Garulfo
Hi all,
On GARULFO, and I suspect on other A54s and maybe SM, there are three 24VDC to 12VDC converters, marked “permanent”, “hydra/iscan v90” and “VHF icom”. Of those, only the “permanent” one has the input +0V and the output +0V posts connected. Does anyone know why that is? Why shouldn’t the other 2 be the same? In one pic:  Thanks Best, Thomas GARULFO A54-122 Tahiti
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Re: Chain Counter
Thomas Kleman
The only thing I would add is that this is an item that you buy 2 at a time. Put one away with your spares and notes on this project. It will next break when you are in Bora Bora.
Tom and Kirstin SM2K 422 L'ORIENT Bora Bora, FP
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Re: VHF antennas
Scott SV Tengah
That was my assessment when I ran the RG-8X with the mast up. We actually tried to feed some LMR-400 through after the fact and it was nearly impossible. I ran RG-8X all the way to the VHF to replace the super thin RG-58u that Amel put in originally. Getting the Rg-8x through the boat from the base of the mast to the VHF wasn't super easy either. Perhaps you can do it with LMR-400, but I wouldn't want to try and risk breaking things inside the little conduits inside the boat. If I ever need to remove the mast, I will cut the rg-8x and add more splices and the connector. It's not difficult but no need to add those lossy connectors for now, IMO.
On Fri, Jun 25, 2021 at 10:47 PM Mark Barter <markbarter100@...> wrote: Hi Mark,
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Re: Chain Counter
Thomas Peacock
Hi Bill,
toggle quoted messageShow quoted text
We had a similar problem on SM 240. Using the chain counter would trip the 24V->12V converter under the nav station. I can’t remember the exact wiring diagram, but the wires indeed run from the chain counter back, I’m not sure if they connect to the small box above the galley by the autohelm, or if they connect to the contacts under the joystick in the cockpit. And, indeed, they do draw their power from the converter under the nav station. Assuming the wires are not shorted themselves, the most iikely culprit is the proximity sensor right by the windlass. Ours was blown, and replacing it fixed the problem. You could try disconnecting the sensor, make sure your converter is working, and then test the voltage by the windlass. If indeed your sensor is bad, you can purchase a new one: IB 5072, made by IFM. I bought it in the US from Radwell; however, IFM is a German company; if you are in the EU you might be able to buy directly from IFM or a European distributor. There is more chatter from me on this site from May 2019 that may be helpful to you. Good luck! Tom Peacock SM 240 Aletes Chesapeake Bay
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Tom Peacock SM 240 Aletes Chesapeake Bay
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Re: VHF antennas
Mark Barter
Hi Mark,
That is really helpful, thank you. It is difficult to see how even 6mm cable would be easily run given the setup at the bottom of the masts. On the basis of what you have said I will wait until the masts are down to replace the cables. There are some other jobs that can be done at the same time. Did you leave enough cable at the bottom of the masts to reach the nav station or did you put in a connector near the bases? Thanks again. -- Mark & Nicky Barter S/V Nunky SM 110
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Re: VHF antennas
Mark,
I successfully ran LMR-400-UF (Ultraflexible) down both the Mizzen and the Main for AIS and for VHF so it can be done. I was actually even able to run a third length of it down the Mizzen mast for a Wilson Omni Directional Cellular in the Mizzen and one in the Main. However a few big caveats: 1. I had the masts down on the ground, not stepped on the boat. This gave me much better access for pulling the cables than you will have with the masts stepped. I could basically pull the cables out the hole in the bottom of the mast. See the picture below:  Obviously, with the mast stepped, you don't have this access. At the base of each mast you only have the small access ports from which to either feed or pull the cables. And that access is tight. Real tight. If you have not done so, remove the cover and see for yourself. Yes, you can pull the cables straight out the top of the mast with the cables stepped, but having worked at the top of the mast I can say with certainty that it will not be nearly as easy as doing it standing on solid ground. 2. I removed a bunch of unused cables from the cable chases in the masts before I ran anything. I removed:
Other things I learned doing this:
 You can see these "stubs" by removing the access ports in the side of the masts. To summarize: You can install LMR-400-UF cable in Super Maramu Masts, however, I wouldn't try it with the masts up! Feel free to ask me any questions. -- Mark McGovern SM #440 Cara Deale, MD USA
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Chain Counter
william reynolds
My chain counter, which was working properly, suddenly ceased to function.
There are no wiring diagrams that I can find. I searched the Amel site and found several hundred threads but no wiring diagrams. I tried to trace the associated wiring but what I found was a plethora of non associated wires. The wires to the sensor on the windless were blue, brown and a yellow/green bonding/ground wire. These led to the area in the fwd cabin where the relays for the windlass were and then disappeared forward never to be seen again. In the area above the sink, to the left of the steering rack is a box labeled "computer of the chain. There were 2 large black cables with #16 - green, white and black wires within that went to the counter above on the panel. These connected to smaller grey cables at a terminal strip which then disappeared into a large bundle and I ASSUME go the the chain counter box below the nav station. I when I checked the fuse on the box labled "chain computer" all the instruments quit! The boxes under the nav station were Newmar equipment and labled VHF radio, full time dc to dc (24 to12 volt) and Hydra/chain computer. The wires from the box above the sink terminate here somehow. Anyone have a clue as the schematic or wiring diagram. There is a switch on the "chain comp. box that turns off the chain computer AND all the instruments. You have to kill all the instruments to work on the windlass. Not good if you are underway. Any information out there?? Bill Reynolds Cloudstreet SM2K 331
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Re: Rigging and Terminals
Good to know Jarek. Thanks for the reply. Best. Victor
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Re: Rigging and Terminals
Mark is correct about using ACMO's Stainless Steel Turnbuckles with Bronze inserts. The reason that chrome-plated bronze is not desirable anymore is that the EPA in Europe and the USA has restricted the chrome-plating process and chemicals that were previously used are outlawed. This has made anything that is chrome-plated less desirable, especially in a marine environment. The same thing applies to chrome-plated bronze winches, etc. Bill
On Fri, Jun 25, 2021 at 12:26 AM Mark Barter <markbarter100@...> wrote: If going for ACMO, which I would do, just make sure you go with stainless for the body. The bronze ones tarnish quickly and can't be satisfactorily polished.
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Re: Rigging and Terminals
Victor Hi,
After purchasing my SM201 in 2020 I changed all for brand new BSI and it is superior quality. I considered ACMO but price/quality ratio was all in favour of BSI. Jarek SY NOA BLUE SM 201
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Re: Rigging and Terminals
Thank you Mark. Best
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Re: Rigging and Terminals
Mark Barter
If going for ACMO, which I would do, just make sure you go with stainless for the body. The bronze ones tarnish quickly and can't be satisfactorily polished.
ACMO's customer service is excellent. I am sure they will be able to advise you if you are at all unsure. -- Mark & Nicky Barter S/V Nunky SM 110
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Re: VHF antennas
Mark Barter
I think I am suffering from analysis paralysis. I have read that LMR-400 is superior to RG8-X especially where the cable run is over 20m but I am worried that LMR-400 maybe too thick to run down the mast. Once at the bottom of the mast I don't see any problem and I am not worried about the bend radius of either coax.
I have noted however that Scott seems to be more than happy with the results after using RG8-X so maybe LMR-400 is just overkill. Like I say, I maybe overthinking this. It is 6am and I have thought of little else since I woke at 5. Has anyone successfully run LMR-400 down the mast of a Super Maramu to the nav station? -- Mark & Nicky Barter S/V Nunky SM 110
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Re: VHF antennas
Scott SV Tengah
Porter, It's not the solder that's the issue. It's the design of the PL-259 plug used for VHF antennas. You just have to seal it well with self amalgamating tape and then a layer of good electrical tape. I even zip tied the electrical tape for good measure. Some stuff the plug with silicone grease to remove all air pockets. But knowing how nothing sticks to silicone, I just put a little grease on the conductor and then wrapped the whole connector up really well.
On Wed, Jun 23, 2021 at 12:17 PM Porter McRoberts via groups.io <portermcroberts=yahoo.com@groups.io> wrote:
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Re: Steering Wheel Dimensions for new leather cover - AMEL Sharki?
bare metal was 22mm [rim] 24 with leather. ALL dimensions are bare metal. I think there might be some slight variation during manufacture of the wheel. Aras Sharki #163 1988
On Thu, Jun 24, 2021 at 2:22 AM Johannes Schmidt <info@...> wrote:
-- Aras Grinius
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Re: Rigging and Terminals
Thank you so much, Arno and Bill. This group is awesome! An endless well of valuable information... Best. Victor
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Re: Steering Wheel Dimensions for new leather cover - AMEL Sharki?
Johannes Schmidt
Dear Aras, Thanks for a short verification!
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Re: Running rigging
Drew Gaffney
Hi Bill,
I have the "running rigging llist on pg 19. Is that the list you note above? I think I'm a bit confused as the various brands and suppliers don't always include the actual type of material. We're heading back to Sardinia next Wednesday and I was going to replace some of the older lines. Thanks, Drew
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Re: VHF antennas
Paul Harries
Interesting discussion on subject here
-- Paul Harries Prospective Amel Buyer
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Re: Steering Wheel Dimensions for new leather cover - AMEL Sharki?
The wheel dimensions I measured are as follows: Spokes at the hub 38mm Spokes at the rim 18mm Rim 24 mm Leather wrap is 2mm I hope this helps Aras Sharkli #163 1988
On Mon, Jun 21, 2021 at 3:40 AM Johannes Schmidt <info@...> wrote:
--
Aras Grinius
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