WotEver
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Posts posted by WotEver
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32 minutes ago, Loddon said:
I am ignoring the fact that one meter will have 8m of cable on it and the other 1m hoping that their impedance is high enough to negate any voltage drop
Yes, that at least should be a reasonably safe bet.
A few years ago I adjusted everything to match what I believed to be a calibrated Avo. It was a few months later that I compared my Avo to my Fluke which had just been calibrated and found it was a fair bit out. Like you though, I was happy that all my meters agreed (except for the Fluke) even if they were a few percent out. I never did get around to tweaking them all again.
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1 hour ago, Dr Bob said:
The energy needed to change the state of the propane from liquid to gas comes from heat which comes from the liquified gas itself ....so the liquid gas cools....so the bottle gets colder.
Exactly how a fridge works.
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4 minutes ago, sailor0500 said:
Now I feel really confused. As usual on Forums one asks a simple question and it starts a discusion which produces no definate answer and even seems to confuse the experts.
Well, you had the direct answer to your question in post 2. The rest is ‘discussion’ as per the name of this forum.
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18 minutes ago, Loddon said:
10metres gives 0.53ohms .
Wanders off to look in junk box
Farnell again... perhaps you could sell the other 90 metres...
https://cpc.farnell.com/unbranded/ecwo-71/22swg-enamelled-copper-wire/dp/CB01220?ost=Enamelled+22swg
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34 minutes ago, bizzard said:
Remember Valentines Valspar, what a good paint that was for brush painting, not to mention Woolies paint.
I told you not to mention Woolies paint.
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Or (more expensively) from Amazon...
RESISTOR, POWER, 0.5OHM, 300W, 10% C300KR50E By OHMITE https://www.amazon.co.uk/dp/B018CQCW18/ref=cm_sw_r_cp_api_i_onADFbHS3S0J7
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300W 0.5R available ex-stock from Farnell:
https://uk.farnell.com/multicomp/mc14654/wirewound-resistor-0-5-ohm-300w/dp/9456805
That’d give you about 25A.
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1 hour ago, Athy said:
It's one of those things which foreign students of English find hard to grasp: the difference between "sleeping" and "asleep".
Yes, but not just foreigners. As I see it, they are interchangeable in some circumstances. Both of the below examples work, I believe, with no difference in meaning between them.
The dog is asleep, don’t startle him.The dog is sleeping, don’t startle him.
Sure, if you want to use fall as the verb then it’s pretty obvious that you’d use asleep as the adverb but I’d say that many English folk would also struggle with the difference between the two words in certain circumstances.
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11 minutes ago, David Mack said:
Today. Opposite the Shady Oak pub, Shropshire Union Canal.
Drawbridge
Naughty Cal has a document on exactly how that should be operated...
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3 minutes ago, Athy said:
Didn't you wake up and do some work from time to time?
Come now sir, let us not be too adventurous.
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3 minutes ago, Abroad said:
Hi @John Wetton,
How did you get on? I've just bought an Aqualine reverse layout boat, and need to try to sort out the TV aerial, so any advice or findings you can share would be massively appreciated.
Many thanks.
John hasn’t visited this forum for over a year, unfortunately. What exactly is it that you wish to sort out?
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4 minutes ago, Soozie said:
Noted. Does rum work the same?
Very similar but somewhat faster.
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5 minutes ago, Alan de Enfield said:
In the OP's case I'd plug each branch at the appliance end, remove the regulator and cap off the piping and remove any cylinder.
Simple to DIY, and it doesn't require a Gas Safe bod because, however shoddily it's done, there is no gas.
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4 minutes ago, Keeping Up said:
You've lost me there. If you mean that for a capacitor, the impedance is inversely proportional to frequency, then I agree. But for an inductance the impedance is proportional to frequency, and that is what I am talking about. A 47uF capacitor will have a high inductance, particularly as it is almost certainly an electrolytic. In effect it will have a series resonant frequency which is well below VHF, and its impedance will continue to rise with frequency thereafter.
Sorry, I meant reactance, not inductance... d'oh!
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1 minute ago, Soozie said:
Yes, he said my first step is to get a gas safe engineer to do a gas saftey certificate.
Then follow the advice above and find yourself a new examiner and take his advice.
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4 minutes ago, PaulD said:
If you search this site for gas safety certificate you will see that getting one is not a bss requirement for a private leisure boat . It is good good practice but your examiner is wrong.
I suspect that the examiner meant that it must still pass BSS regs for soundness etc. But perhaps he did indeed mean a GSC in which case yes, he was wrong.
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5 minutes ago, Tony Brooks said:
Engine mounts for tightness both the big nuts and the bolts holding the feet to the bed. Then any thrust bearings on the shaft and finally the gearbox bearings but with just two posts are you a new boater. Shaft drives often do rumble at idle in gear.
OP has made 109 posts, Tony
And been a member here for 11 years...
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7 minutes ago, narrowboatmike said:
Great, many thanks for the suggestions. CEF electrical sounds the business, thanks once again, Mike.
Ensure you get the matching plug though
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28 minutes ago, Soozie said:
The bss guy said I would have to get the pipes capped so they were inoperable and remove the empty gas bottle from the locker. He said the boat would need a gas safe cert aswell?
Yes, that was my point. Simply capping the pipes still leaves it 'available for use', so it would require a cert. Removing the regulator and any pipes in the gas locker makes it a gas-free boat. At least, that makes sense to my mind, which doesn't necessarily mean a BSS inspector would agree.
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19 minutes ago, TheBiscuits said:
How often will it be at that power level?
Probably only when the kettle is on, as long as no electric heating is in use.
Hence my second sentence, which you didn't quote
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40 minutes ago, Halsey said:
RS said OK for continuous use so long as they were well ventilated esp underneath it did get hot but they do have a safety trip and mine never tripped in an engine room
The spec of https://uk.rs-online.com/web/p/safety-site-transformers/1226709/ states RATING 3.0 kVA INTERMITTENT 5 MINS ON 15 MINS OFF
Probably okay for continuous use if you're not using it close to its limit.
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I'd have thought that all you'll have to do is remove the regulator and any piping in the gas locker. Pretty simple DIY work. Simply capping off any outlets would mean that the system would still have to comply, surely?
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40 minutes ago, Tracy D'arth said:
Electrolytic are not suitable as isolation capacitors, the have leakage and too high values. Should be Y type polypropylene or better.
Indeed. And as a capacitor's reactance is inversely proportional to frequency it can't be 'too big', merely unnecessarily big.
1 hour ago, Keeping Up said:No it won't, it will have too much self-inductance and will be a high impedance at VHF (probably at HF too)
How does that work then? Inductance is inversely proportional to frequency.
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20 minutes ago, Flyboy said:
47uf won't at VHF.
Sure it would. We’re talking series here, not parallel.
Isolating Transformer.
in Boat Building & Maintenance
Posted
Yes, but as that wasn’t your question I’d say you can ignore it