6
S
Smiffy
Well-known member
Be careful of some of the cheap frames are really flimsy. Nice to see it first.
6
6feetdown
Well-known member
I did wonder about the fibreglass quality tbf
S
Smiffy
Well-known member
I don't think we broke the fiberglass. But the frame was bent in less than an hour.
Cut the CCTV head off of a CCTV unit when a manhole cover closed itself on it.
V8Druid
do it as well as you can,but learn to do it better
's one thing putting it in the wrong way round briefly, but leaving it in there long term is testing the diode's performance capabilities
GazCro
Well-known member
V8Druid
do it as well as you can,but learn to do it better
Yeh, yeh, a diode's primary function is to protect against back EMF/ reverse polarity, but like all semiconductor based components, has a finite life .... deliberately subjecting it to reverse polarity for prolonged periods WILL shorten it's life
Gecko
Well-known member
It's unlikely to be as simple "just a diode". That'd work, but you'd also get the voltage drop across the diode junction, typically 0.6V. Doesn't sound like much, but if you're starting with only 1.2V, it limits the electronics you can run on it.
If the sonde is built with this practice in mind, you can use a MOSFET to fake a "ideal diode' (in this case, 'ideal' means 100% isolating when off, lossless when on).
If the sonde is built with this practice in mind, you can use a MOSFET to fake a "ideal diode' (in this case, 'ideal' means 100% isolating when off, lossless when on).
Danny
Well-known member
I bought similar after trying to trace with an old reel of electrical cable on a broken water pipe and looked really amateurish in front of the client
Wasnt cheap but is really good quality, I feel with a small sonde I would put it somewhere and forget where I've put it but with a reel, it's easier to find every time i need it
Furniss
Well-known member
It finally arrived after customs held it up needing xtra forms filling in
What a cluster f**k it is now after Brexit.
Anyhow did we reach a conclusion as to whether reversing the battery would lead to a slow and painful death or not ?
V8Druid
do it as well as you can,but learn to do it better
just put an insulating strip between the battery and the contactsView attachment 44335
It finally arrived after customs held it up needing xtra forms filling in
What a cluster f**k it is now after Brexit.
Anyhow did we reach a conclusion as to whether reversing the battery would lead to a slow and painful death or not ?
S
Stroppymonkey
Well-known member
Old post Resurrection. Sonde is on my shopping list, have a buried chamber to locate. Are you using yours with CAT? How you getting on with it please?View attachment 44335
It finally arrived after customs held it up needing xtra forms filling in
What a cluster f**k it is now after Brexit.
Anyhow did we reach a conclusion as to whether reversing the battery would lead to a slow and painful death or not ?
Furniss
Well-known member
Brilliant thing - traced it a couple of times with my old cat, turn cat right down and drop right on it 
Giles
Well-known member
I have one but prefer to use genie on snake to trace stuff, easier to follow from where you are etc than finding sonde as a one off on end of rods
Continues snake has two cable clips to clip genie too etc
Continues snake has two cable clips to clip genie too etc
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Stroppymonkey
Well-known member
Yes I have one of them… I do find it hard to find the actual end of it though ? Maybe I need more practice.
S
Smiffy
Well-known member
We use a sonde all the time. Needs two people though as it's very easy to loose it on your own. For what we do which is usually short runs of pretty poor surface water drainage it's perfect on a set of rods and takes up far less room. The gangs work out of either double cab tippers or tippers with tool pods so carrying a cobra is impractical and drain rods need to be carried anyway.
Giles
Well-known member
If I’m looking for a chamber I use it with my camera snake so I know the end is in the chamber then trace along and signal goes off keep reducing sensitivity changing orientation until you zero in on an area. I’ve also got the c scope metal detector for finding metal lids that are burried etc
S
Stroppymonkey
Well-known member
Metal detector and camera snake also on the list . Which camera do you have ?
Giles
Well-known member
View attachment 44335
It finally arrived after customs held it up needing xtra forms filling in
What a cluster f**k it is now after Brexit.
Anyhow did we reach a conclusion as to whether reversing the battery would lead to a slow and painful death or not ?
I keep the battery reversed in mine seems to have been ok for a year or more
Giles
Well-known member
Just a cheap kit one think it was about £500
Like this one https://www.ebay.co.uk/itm/19678586...nqH_SsZTOa&var=&widget_ver=artemis&media=COPY
Keeping my eye out for a better one at auction.
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