That would indicate dry solder joints, rather than actual failed
components. Most probably solder connection to the sockets.
There is almost nothing inside...
Power supply; basic amplifier; perhaps filter components and then some
impendence matching to each output socket.
Very likely to be a lightning belt, this happened to ours a few weeks
ago. Identical symptoms. Unless you can recognise the appropriate
transistors then replacement is the only cure!.
Don't worry about it being in the loft, the one that did ours in hit a
house 400 yards away!....
OK so I'm planning to buy a new TV distribution amplifier. Can I get a
My existing one (assumed faulty) boasts a frequency range of 40-900MHz.
Maplin have a 6-way and an 8-way model (nos YZ86T and KR20W), both with a
frequency range of 47-230MHz.I've seen other models on ebay quoting near to
the 900Mhz top end.
a) is the much lower top end of the range on the Maplins a problem for TV
signals? I'm afraid I've no idea whether it's important or not.
b) the two Maplins models are the same price - is there any reason not to
simply buy the 8-way one?
Any advice appreciated.
You'd do best if you avoid one that covers around 170 MHz if you live
anywhere near a main road. Most taxi radios operate around the
160-170MHz range; if they "key-up" anywhere near your sensitive
amplifier you'll very likely get breakthrough, or at least overload of
the amplifier causing all sorts of problems.
If you want really reliable reception of _TV_ and aren't interested
in FM or DAB reception via the same amplifier, get one which operates
on UHF only.
That sounds like the FM range. It doesn't even get into the TV band, which
would be a slight problem if it was indeed all the unit could manage ;-) A
minute's Googling turned up the spec for the UHF range as 470-862MHz.
Probably not. My own amp is looking a bit iffy, but I wasn't keen on what
seemed to be the somewhat high gain quoted on the Maplin units - they claim
12dB per output. Fine if your signal is somewhat weak, but if you are
distributing the signal (as I do) from the digibox and VCR chained together,
then each of these has in turn typically added a small boost already. My
Taylor unit says 2dB on it - it's basically just distributing and only
amplifying in the sense that 8 outputs from 1 input does require
amplification. There have been times when I have found a 6dB attenuator on
the amp input has reduced some noticeable noise and visible artifacts.
For the words of the profits were written on the studio wall.
I wish I knew how you found that out in 1 minute's googling - I've hunted
high and low and can't find it - any google tips?
Meanwhile I went to Maplins and bought a slightly different model (it's what
they had in stock) the L24AG, which is one of those ones with a digital
by-pass. Anyway, I've plugged it in and now my picture is near PERFECT on
all TVs. So the old amplifier was faulty for whatever reason.
Incidentally, this model has a gain of 6dB on each output. I'm distributing
the signal from the loft, near the aerial. I don't know about this digital
by-pass thing as we have cable TV.
Thanks everybody for all the help.
I happened to know it was branded SLX (as I'd looked at them in my local
maplin). Second link under "SLX 6-way amplifier specification" got me the
info you needed. Always give Google a selection of words to go on.
Specification was probably the key here.
I have Google's Toolbar loaded into IE and Firefox. Search engine is set to
google.co.uk as this nicely pops up results with the additional "Search UK
pages only" button. Not fool-proof, but pretty reliable.
When looking for prices, I usually add VAT into the search string.
Apart from that, practice is the key. I have misspent a lot of time online
Thanks. I think you were quite lucky with that one, though! Other search
variants don't find that site.
I too use the Google toolbar in the way you do. Nice idea about VAT for
The 6dB box I've bought is certainly doing the business for me, no idea
whether 12dB gain would have caused any problems.
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