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19 November 2003, 21:00
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#21
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Techi
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JW.
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19 November 2003, 21:05
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#22
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Member
Country: UK - England
Town: SOUTHAMPTON
Boat name: Won't get Fooled Again
Make: Ribtec
Length: 6.5
Engine: Honda 130
Join Date: Mar 2002
Posts: 888
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oh what a surprise! good on you I expect you get some good results
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I need a little bit of Rhythym and a little bit of Blues
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19 November 2003, 22:20
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#23
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Cheers. Nice of you to say.
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JW.
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19 November 2003, 22:27
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#24
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Member
Country: UK - England
Town: south shields
Boat name: jessiesue
Make: avon searider
Length: 4m
Engine: 40hp mariner pull start l/s
Join Date: Nov 2003
Posts: 38
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cheers again guys, i will keep you posted on how i get on.
regards
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20 November 2003, 08:44
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#25
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Member
Country: UK - England
Town: Saltash, Cornwall
Make: Rib less:-(
Length: no boat
Join Date: Sep 2002
Posts: 693
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IF you can't / don't want to buy a bridge recifier, have a scavange on old tele's and other electrical kit. I think we robbed one out of a tele to fix the generator out in the bush in Zim.
Good luck, it will save you having to keep moving the battery and I've seen people cause dammage to the boat when moving them about.
Jelly
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20 November 2003, 09:15
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#26
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Member
Country: UK - England
Town: Brittany/Portsmouth
Boat name: Merlin
Make: Solent 6.5
Length: 6m +
Engine: 200
MMSI: soon !
Join Date: Jul 2003
Posts: 5,451
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Its a long time since I did this, so don't shoot me if I'm wrong Jwaker, but don't you also require a "smoothing Electrolytic capacitor" to change it from its full wave rectifier sign to a more smooth DC.
Electronic equipment used to have a problem with unsmoothed rectified DC but this may not be still the case .
All IMHO
Paul
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Happy New Resolutions!!! : RIBbing for the craic!!!
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20 November 2003, 12:19
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#27
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Member
Country: UK - England
Town: east cowes
Make: academic
Length: no boat
Engine: fresh air
MMSI: N/A
Join Date: Sep 2003
Posts: 543
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if you have a battery in parallel that will do the smoothing, but do not! connect electronic equipment without the battery.
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20 November 2003, 23:58
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#28
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Member
Country: UK - England
Town: Leatherhead
Length: no boat
Join Date: Aug 2001
Posts: 907
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Peter (nick, nick) T
Age and treachery will always overcome youth and skill! Bullshit and brilliance only come with age and experience.
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23 November 2003, 20:26
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#29
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Member
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 5,596
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Quote:
Originally posted by jackeen
Its a long time since I did this, so don't shoot me if I'm wrong Jwaker, but don't you also require a "smoothing Electrolytic capacitor" to change it from its full wave rectifier sign to a more smooth DC.
Electronic equipment used to have a problem with unsmoothed rectified DC but this may not be still the case .
All IMHO
Paul
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Jackeen, as Nik says.
There will still be a bit of ripple but it'll be ok. Modern electronics will contain their own voltage regulator/smoothing.
If very unlucky, it could transmit a bit and buzz the radio.
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JW.
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24 November 2003, 14:32
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#30
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Member
Country: UK - England
Town: east cowes
Make: academic
Length: no boat
Engine: fresh air
MMSI: N/A
Join Date: Sep 2003
Posts: 543
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rectifiers
I guess I should have made the point that with full wave rectification (a bridge rectifier) you are pretty safe. BUT, battery chargers often only use half wave rectification (cos its cheap) and it doesnt matter because the battery absorbs the peaks and smooths out the waveform.
I comprehensively blew an item up once by testing it on a battery charger, the peak voltage was much higher than the rms voltage.
This may be a different situation to what you find on an engines charger, but I hope its a useful warning anyway.
Nick.
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