Log and depth sounder

groundhogyh · Jun 28, 2009

Not sure if this is the optimum spot, but my depth transducer is located under the toilet area. My paddle wheel is located in the same area except on the port side.What I know about transducers... Some work at 200kHz, and some lower (75kHz ?). The high frequency ones have better depth resolution under 200 ft. depth. The low freq are better for larger depths. Some systems run a transducer that works at both frequencies.rb

Vega1447 · Jun 29, 2009

Hi John
I have a Clipper (dsounder only) also - when I installed it I just wired
in a single pole toggle switch on the positive/live line between the
12V+ supply and the display with a (? 0.1 A) fuse in the line also as in
install notes).Not sure whether install notes talked about a switch or not - there are
so many different ways of doing it (single switch vs. panel of switches
etc) that they may not have?

John

V1447 BreakawayJohn Booth wrote:

Vega1447 · Jun 29, 2009

Sorry,
forgot to say that I get same depth indications from the transducer
from my old rotary ds as from the one that came with the Clipper.

I could have saved myself some work and used the old one!

John

V1447 Breakaway

John Booth wrote:

pjacobs55 · Jun 29, 2009

Many newer marine electronic devices are designed to use a panel circuit breaker as the power switch. You can install a separate in line switch.Nicholas H. Walsh P.A.
111 Commercial St.
Portland ME 04101
207/772-2191
Fax 207/774-3940

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From: John Booth
Sent: Sunday, June 28, 2009 6:38 PM
To: Albinvega@yahoogroups.com
Subject: [AlbinVega] Log and depth sounderHi All,

My old Seafarer 501 rotary depth sounder has finally given up the ghost. I have replaced it with a Clipper Duet combined depth sounder and log. I have three questions. Although I have been able to wire in the display OK, I can't find any sort of on/off switch! At present I'm switching it off by removing the in-line fuse. Am I missing something obvious - possibly very obvious? Secondly, in order to get it working first time round, I simply plugged in the transponder from the old Seafarer and - hey presto! it worked. I haven't checked whether the depth readings are correct yet, but is there any reason why I shouldn't continue to use the old transponder? Will it give inaccurate signals to the display? I can of course just use the one that came with the Clipper, but if the old one works, why throw it away?

Thirdly, does anyone have a view where the best place is to drill the hole for the log's paddle wheel? I was thinking of positioning it so that it comes up under the port bunk.

Many thanks,

John Booth
Vagrant 1718

bty13251953 · Jun 30, 2009

Hi
Clipper Duets are extremely sensitive to power surge and it\'s back to the manufacturer and @£30 plus postage every time you upset them
Should be fitted with lowest ampage fuse you can find.
Disconected any time you work on the electrical system
Generally handle as electrical eggs
Regards David Chapman

groundhogyh · Jun 30, 2009

Ouch!Maybe stick a big giant capacitor on the +/- supply?rb

imbissfrank · Jul 1, 2009

A capacitor on the either side of the DC power suppply will effectively ensure that it does NOT operate at all. Capacitors are effective filters only in Alternating Current AC circuits.Frank Gallardo Jr
sv Cin Cin V-2184
"May the warm wind at your back not be your own"

groundhogyh · Jul 1, 2009

I'm not following your comment on the capacitor.
rb

imbissfrank · Jul 2, 2009

Someone mentioned maybe putting a giant capacitor in the +/1 supply line. I assumed they meant the battery power supply line. Also known as the B+ line. It is impossible for a steady (battery) current to flow across a capacitor. If an uncharged capacitor "C" is connected across the terminals of a battery of voltage "V" then a "transient" current flows as the capacitor plates charge up. However, the current stops flowing as soon as the charge "Q" on the positive plate reaches the value "Q = CV". At this point, the electric field between the plates cancels the effect of the electric field generated by the battery, and there is no further movement of charge. Thus, if a capacitor is placed in a DC circuit thenm, as soon as its plates have charged up (which can be instantaneous), the capacitor effectively behaves like a "break" in the circuit. But of course if one is talking about the coax signal cable, then we are dealing with an electronic
RF alternating signal. Simply putting a capacitor into the line that has not been engineered into the circuit could play havoc with the resulting depth readings.Frank Gallardo Jr
sv Cin Cin V-2184
"May the warm wind at your back not be your own"

groundhogyh · Jul 2, 2009

Frank,If a person has problems with the supply voltage of their depth sounder, and it's causing the device to fail for some reason, then putting a cap across the +/- supply right at or near the depth sounder may help. It depends on what the actual failure cause is. If it is transient type spikes, which is AC, they will be decreased in size by the capacitor. The 12 vdc won't be affected.roy

imbissfrank · Jul 2, 2009

AHA !! You are absolutely right, putting a capacitor "across" the B+ and not in series will "smooth" out or suppress transient spikes that is true, which is similar to their use in smooothing out any ripples in ac rectifier circuits.Frank Gallardo Jr
sv Cin Cin V-2184
"May the warm wind at your back not be your own"

groundhogyh · Jul 2, 2009

Ok.. now that we have that straightened out, on to more important things..What is the difference between aft and abaft?
roy

j.hunter9999 · Jul 2, 2009

A short internet search yielded the following (paraphrased, of course): Technically, "aft" is near the stern and "abaft" is behind some object. For example, the cabin could be an aft cabin, meaning a cabin near the stern. Or, a cabin could be abaft the forward bulkhead, meaning it is located somewhere between the forward bulkhead and the stern of the boat.

After that explanation, I realize that I am totally abaft the grammatical power curve.

Jack

groundhogyh · Jul 2, 2009

Thankyou Jack.Always learning (as Benny Hill used to say).
rb

albinvega3283 · Jul 3, 2009

Aft = Back or stern of a boat
Abaft = Aft off e.g. Aft of the beam - towards the back of the boat from the middle from end to end

I am an dyslexic Englishman so bear with me

David
Ponteneur V3283From: groundhog
Sent: Thursday, July 02, 2009 10:18 PM
To: AlbinVega@yahoogroups.com
Subject: Re: [AlbinVega] Log and depth sounderOk.. now that we have that straightened out, on to more important things..What is the difference between aft and abaft?
roy

john833194 · Jul 3, 2009

Hi David,

Thank you to everyone for your contributions. I think I\'ll stick to the in-line fuse which seems to work fine.

John Booth
Vagrant1718

________________________________
From: D CHAPMAN <dchapman445@...>
To: AlbinVega@yahoogroups.com
Sent: Tuesday, 30 June, 2009 9:05:35 AM
Subject: Re: [AlbinVega] Log and depth sounder

Hi
Clipper Duets are extremely sensitive to power surge and it\'s back to the manufacturer and @£30 plus postage every time you upset them
Should be fitted with lowest ampage fuse you can find.
Disconected any time you work on the electrical system
Generally handle as electrical eggs
Regards David Chapman

Vega1447 · Jul 6, 2009

A simple switch on the supply side of the fuse would be easy to fit and
would impress your crew no end!

John

V1447 Breakaway

John Booth wrote: