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#1
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Was chatting with my neighbour a few weeks back, and he said that his
teletext didn't work anymore. He reconned the booster was dud, so he had bought a new booster, but this didn't work either. So he bought anotherone and that didn't work. I said i'd have a look sometime, but neither of us had time. Then I was out in the back garden and glanced up and saw a little black box on his wall with coaxs in/out. It looked like one of Fringe Electronics masthead. Suddendy, I thought I knew why his boosters didn't work, it's because he hadn't had a booster previously, but a PSU! I had a quick look on the web yesterday to see if I could figure out Fringe Electronics colour coding to see what the box contained, but found very little until I tried google groups. Whereupon I came accross a post from one of our resident curmudgeons regarding some idiot who had had a PSU go dud and had tried replacing it with a booster! http://groups.google.co.uk/group/uk....4c2469a6e145a1 Went round last night and took the offending item (Labgear PSU) back to my place to test/repair. After a little investigation I decided it was the thermal fuse on the primary of the transformer which had gone, and a little judicious by-passing brought the unit back to life. I soldered a new mains lead with moulded plug on and also added a trailing coax plug and socket to make installation a little easier. Plugged it in and checked I was now getting 12V on the aerial input, took it next door, and plugged it in. Robert is my fathers brother! One happy neighbour! |
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#2
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In article .com,
wrote: [Snip] One happy neighbour! It's amazing how any people move house and take the PSU with them ;-( -- From KT24 - in "Leafy Surrey" Using a RISC OS computer running v5.11 |
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#3
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On 28 Feb, 09:55, charles wrote:
In article .com, wrote: [Snip] One happy neighbour! It's amazing how any people move house and take the PSU with them ;-( Tell me about it! First time I came accross these things was at a friends place. Fortunately the masthead amp was in the loft, and a simple amp-ectomy restored the signal. |
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#4
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In article .com
, writes Went round last night and took the offending item (Labgear PSU) back to my place to test/repair. After a little investigation I decided it was the thermal fuse on the primary of the transformer which had gone, and a little judicious by-passing brought the unit back to life. Pleeeease change the transformer or put in a new thermal fuse . . . Nice story though. -- fred Plusnet - I hope you like vanilla |
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#5
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On Feb 28, 10:58 am, fred wrote:
In article .com, writes Went round last night and took the offending item (Labgear PSU) back to my place to test/repair. After a little investigation I decided it was the thermal fuse on the primary of the transformer which had gone, and a little judicious by-passing brought the unit back to life. Pleeeease change the transformer or put in a new thermal fuse . . . Nice story though. -- fred Plusnet - I hope you like vanilla THIS IS DANGEROUS The thermal fuse went for a reason. Don't burn your neighbours house down as a result of this you will be held liable. UKM |
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#6
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#7
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"Dave Farrance" wrote in message news ![]() You beat me to it. In Bill's story that the original poster referenced, you'll see that an intermittent short in the coax caused the damage to the PSU in the first place. A similar problem here could now be disastrous. I did once see the results of this. The carpet had smouldered and finally gone out, but it was a close call. Bill |
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#8
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I thought that the thermal fuse was under the windings, am I wrong?
I have a box of suitable transformers that I bought on the internet many years ago but just wondered. Isn't it amazing how many people don't realise what a fuse is for? -- Robert |
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#9
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On 28 Feb, 21:04, "Rob" wrote:
I thought that the thermal fuse was under the windings, am I wrong? I have a box of suitable transformers that I bought on the internet many years ago but just wondered. Isn't it amazing how many people don't realise what a fuse is for? -- Robert A Fuse... why it's the chocolate treat an aerial rigger rewards himself with at the end of a hard days work. What else could it be? |
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#10
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On 28 Feb, 21:04, "Rob" wrote:
I thought that the thermal fuse was under the windings, am I wrong? Tiny little thing, looks like a small flat capacitor, laying against the windings on the primary side under a bit of tape. |
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