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Transducers are not randomly interchangeable. Some depthsounders use the same transducers as others, but you'd have to find out what you have and then find something that uses the same transducer. And if that means a modern head with a 30? year old transducer, I'd expect the odds are slim to none. And of course, you don't know if the one you have works, do you? It could damage a new head unit.
 

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Discussion Starter · #42 ·
hmmmm may I inquire as to HOW it would damage the head unit?

but I get it and appeciate the help

whish the old head unit ws on the boat
 

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Discussion Starter · #44 ·
yeoup

I beleive the old head unit was signet...

Im having a hard time thinking that transducers at least simple ones are not intercheangable(for example ive seen lowrance and garmin fishfinders use the exact same stern mounted transdcuer so dunno) after all the fampous airmar transducers can be bought and are used on various head units...as are windvanes, speed indicators etc....

anywhoo

Ill try and take a pic...there is bad access to the transducer so maybe reading a name wont work...

anywhoo
 

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Some pure speculation, but it may be that the electrical characteristics (impedance versus capacitance) that are used to encode the information and the scale used (e.g., some may say that every 10 ohms of impedance means 1 foot of depth to the obstruction, while others may say 20 ohms per foot) could be different based on the manufacturer of the transducer and/or what the head unit manufacturer specified. The transducers may also have different power requirements, and not all head units may be designed to source that much power. That being said, manufacturers may have realized that standardization of some of these characteristics is good, because it will reduce their costs across the industry. If that happened, whether your transducer is one that used the "winning" combination or not is going to be tough to tell without a lot of research.

Hope this helps.
 

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Christian.. I installed a new Raymarine ST40 head on a 25 year old Signet depth transducer.. works great and I gained considerable range to boot.
 
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Discussion Starter · #48 ·
HELL FREAKIN YEAH FASTER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

im almost positive its a signet since everything else was signet

and old! jajaja

thanks guys really appreciate it

trying to save bucke where I can you know and not punch holes in an otherwise sound boat now!

no water in the bilge is a nice thing! jajajaja
 

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Discussion Starter · #50 ·
well nothing major has happened here after plopping the boat back in the water...finshed the port bulkhead and ripped out the head bulkhead that is just structural not attached to any plates...

and I scored a very nice 15hp johnson seahore outboard...that will be my main propulsion for now

till I get somewhere or get somebody to bring me down a nice used engine like an atomic 4.

so

the outboard is in GREAT shape...long shaft and very well taken care of 1977.

its an old 77 but works great, low hours, new impeller and came with a nice metal tank.

Ill be getting a nice solas 4 blade prop(anybody care to help here? need a friendly forwarder jeje) for it so anchoring ans stopping will be improved

I also found out the po used 2 outboard brackets tied together at the wood block to act as one mount...not bad thinking but I need to fix the springs and some rusty bolts that corroded

so thats my news from down here

had some bad work done too, lazy workers not giving a crap and well simply not enough time to be on top of them daily but

we are still at it

decks are finsihed, chainplates are finsihed and even the lifelines and push pull pits have been redone and soldered back into shape and polished the bases ready to be installed with new backing plates.

pics coming soon

at least of the outboard! jajja

peace
 

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Discussion Starter · #53 ·
thanks capt len still havent started working on the elctrical yet but will soon

Im off to the boat as we speak

hopefully some pics! jajaja

peace
 

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Discussion Starter · #56 ·
yes getting an atomic 4 or similar!

a trip to rio dulce is in the books for sure...for now Im happy with my outboard setup

pics coming
 

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Discussion Starter · #57 ·
here we go, some pics

slow progress but hey...

tabbing finally done and painted


lifesaver on a boat on the hook, a nice little generator, this one is a bbt 900watter


more tabbing



dodger frame back on as well as some hardware


ripped out forward head bulkhead


installing pullpit



a pic of my cool dual outboard bracket setup, cant waut to get the new motor on it! jajaja



cheers
 

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Discussion Starter · #58 · (Edited)
this bracket springs up, the other doesnt...need to look at that...my 15hp johnson weighs a nice 80lbs or so...need all the springs I can get...will also be fiddling with the davits and maybe add a crossmember to add a pully system to retrieve the outboard or at least pull it up, quickly



oh whats left of my engine compartment...and the leaky stuffing box!

it was around 1 drop every 3 seconds now, but I pulled the shaft as inwards as allowable and it stopped almost completely



ps. did the cup measurement thing for 2 hours befiore and got a half cup, then pulled the shaft in and after around 4 hours I only had a 1/4 cup at the most....so I guess its "better"

jajaja

edit. so my current leak shoukd be around 1.5 cups a day...x7 days is around 10 cups a week so thats MUCH better than before....
 
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Discussion Starter · #59 ·
here is a pic of my davit mounts...you can see they are angled aft...weight over time. well be fixing this before reattaching davits...



and lastly a little fix to most of my stanchion bases...polished up at least...resoldered and flattened out...some cracks could not be fixed so thats that...for now



thats that

cheers
 
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