Faulty masthead amp?
Richard Tobin
It doesn't work. There is no output signal at all (no picture on
analogue, signal meters read 0 on digital). Is there any obvious
mistake I can have made, or should I assume it is just faulty and
return it?
Yes, I have connected the input from the aerial to the right socket.
There is 12v present on the coax from the power supply. If I use a
passive splitter instead of the amp, there is signal. What else
could I have done wrong?
I'm glad I decided to test it indoors first before climbing onto the
roof.
-- Richard
--
Please remember to mention me / in tapes you leave behind.
Graham.
"Richard Tobin" <ric...@cogsci.ed.ac.uk> wrote in message
news:gv6j2v$22i3$1...@pc-news.cogsci.ed.ac.uk...
Looks like it is faulty.
Is it the PSU or the amp that is faulty, is there 15v dc on the
socket on the PSU marked "IN"?
--
Graham.
%Profound_observation%
Doctor D
"Richard Tobin" <ric...@cogsci.ed.ac.uk> wrote in message
news:gv6j2v$22i3$1...@pc-news.cogsci.ed.ac.uk...
Ensure there are no whiskers of braid touching the main conductor in any of
the plugs carrying voltage as this will cause a short.
Richard Tobin
Doctor D <da...@nospam.f9.co.uk> wrote:
>Ensure there are no whiskers of braid touching the main conductor in any of
>the plugs carrying voltage as this will cause a short.
That would only be the plugs on the single cable from the power supply
to the amp, right?
Graham.
"Richard Tobin" <ric...@cogsci.ed.ac.uk> wrote in message
news:gv7227$278a$1...@pc-news.cogsci.ed.ac.uk...
> In article <wKWdnTWVy-a_n4rX...@brightview.co.uk>,
> Doctor D <da...@nospam.f9.co.uk> wrote:
>>Ensure there are no whiskers of braid touching the main conductor in any
>>of
>>the plugs carrying voltage as this will cause a short.
>
> That would only be the plugs on the single cable from the power supply
> to the amp, right?
>
Yes. The braid must make good contact to the body of the plug, but
not to the inner conductor.
The aerial connects to the right-hand socket of the outdoor
unit, and the PSU "IN" socket links up with *any* of the remaining 4.
Is that the way you are trying it?, try the other three just to see.
Do you possess a multi-meter?
--
Graham.
%Profound_observation%
Graham.
--
Graham.
%Profound_observation%
Richard Tobin
Graham. <m...@privicy.com> wrote:
>The aerial connects to the right-hand socket of the outdoor
>unit, and the PSU "IN" socket links up with *any* of the remaining 4.
>Is that the way you are trying it?, try the other three just to see.
Yes, I tried all 4.
>Do you possess a multi-meter?
Yes, it shows the expected voltage (varying as you turn the gain
control) on the cable from the PSU.
Re your other message - the light is green.
I'll take it back.
Doctor D
> In article <gv74ss$b9u$1...@news.eternal-september.org>,
> Graham. <m...@privicy.com> wrote:
>
>>The aerial connects to the right-hand socket of the outdoor
>>unit, and the PSU "IN" socket links up with *any* of the remaining 4.
>>Is that the way you are trying it?, try the other three just to see.
>
> Yes, I tried all 4.
>
>>Do you possess a multi-meter?
>
> Yes, it shows the expected voltage (varying as you turn the gain
> control) on the cable from the PSU.
>
> Re your other message - the light is green.
>
> I'll take it back.
It certainly sounds like you've covered all bases and it's faulty. As you
say, good job you checked it before climbing up with it!
Brian Gaff
coax though.
Brian
--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email: bri...@blueyonder.co.uk
______________________________________________________________________________________________________________
"Doctor D" <da...@nospam.f9.co.uk> wrote in message
news:wKWdnTWVy-a_n4rX...@brightview.co.uk...
Brian Gaff
because the light worked they put it back in stock.
Brian
--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email: bri...@blueyonder.co.uk
______________________________________________________________________________________________________________
"Doctor D" <da...@nospam.f9.co.uk> wrote in message
news:FvidnfIZB5JEO4rX...@brightview.co.uk...
Richard Tobin
Screwfix, and it worked first time.
One odd thing: on the original, faulty, unit it was very hard to screw
the F-connectors on, as if the start of the thread was damaged. This
was true if all 5 connectors on the amp (though not the PSU). On the
working unit, the plugs screw on easily.
-<GB>-Carpy
I've got a box here with lots of Labgear amplifiers inside (all DA2x2 multi
output ones not the MSA111s). They have all failed within 2 years of
installation and caused me no end of grief. I contacted Labgear repeatedly
to see what they had to say about so many failures but they weren't
interested, and so these days, with the exception of the MSA111s, I never
use Labgear products at all.
Bill Wright
"-<GB>-Carpy" <ca...@nothanks.com> wrote in message
news:9bfTl.42183$Ec5....@newsfe27.ams2...
And me. I still use MSA111s as little preamps to go before channel filters,
but I bet if I looked I'd find that Proception did something as good. The
odd thing though is that the MSA111s never seem to go wrong.
It's all a far cry from the glory days when Labgear came along like a breath
of fresh air, with better products at better prices than the Wolsey and
Teleng names, which virtually had a duopoly in the TV distribution system
market.
Labgear has been no good since the firm collapsed. The new iteration has
little to offer in my opinion.
Bill
Woody
news:isSdnewAhuw7UYDX...@pipex.net...
Labgear was originally a 'B' group company as part of the Pye
group. Philips owned Pye from 1967 but changed the overall name
in 1986.
It was after Philips made huge and unexpected losses in 1990 and
they sold off many of the subsidiary organisations - including
Labgear - that Labgear started to go down hill in my opinion.
Then they went to the wall and the name was bought up and is now
being used on products made in the Far East and, as Bill says,
that do not reflect the quality or design standards anything like
those of the original company. Goes along with many other
formerly well respected names - Wharfedale being a good example.
--
Woody
harrogate three at ntlworld dot com
Terry Casey
>> like a breath of fresh air, with better products at better
>> prices than the Wolsey and Teleng names, which virtually had a
>> duopoly in the TV distribution system market.
>>
>> Labgear has been no good since the firm collapsed. The new
>> iteration has little to offer in my opinion.
>>
>> Bill
>>
>>
>
>
> Labgear was originally a 'B' group company as part of the Pye
> group. Philips owned Pye from 1967 but changed the overall name
> in 1986.
>
> It was after Philips made huge and unexpected losses in 1990 and
> they sold off many of the subsidiary organisations - including
> Labgear - that Labgear started to go down hill in my opinion.
> Then they went to the wall and the name was bought up and is now
> being used on products made in the Far East and, as Bill says,
> that do not reflect the quality or design standards anything like
> those of the original company. Goes along with many other
> formerly well respected names - Wharfedale being a good example.
>
>
IIRC Labgear was, for a time, owned by the Finnish company Teleste but,
presumably, the sold it on - certainly Teleste's UK office is no longer
in Cambridge, nor has been for a few years now.
Terry
Bill Wright
"Terry Casey" <k.t...@example.invalid> wrote in message
news:dTsTl.167700$qP7....@newsfe04.ams2...
> Woody wrote:
> IIRC Labgear was, for a time, owned by the Finnish company Teleste but,
> presumably, the sold it on - certainly Teleste's UK office is no longer in
> Cambridge, nor has been for a few years now.
The Teleste period was marked by head-end equipment that required two
separate PSUs of different voltages. I suppose this was the result of the
uneasy marriage between the two companies.
The recent stuff from the far east has been far from impressive in my
opinion. In particular the first batch, with bright blue LEDs, was very
unreliable.
Incidentally, whilst in Cambridge a few weeks ago I noticed a lot of the old
original Labgear UHF aerials were still in use (you'll all be able to figure
out why). 35 years old and still going stong. That was quality.
Bill
tony sayer
<insertmybu...@f2s.com> scribeth thus
quite some years ago. Used to flicker when the wind blew..
--
Tony Sayer