Digest for sci.electronics.repair@googlegroups.com - 8 updates in 3 topics

"malua mada!" <fritzo2ster@gmail.com>: Jun 22 11:48AM -0700

I have an Oregon Scientific alarm clock that has five prominent buttons on its face: Clock, UP, DOWN, ALARM, ZONE.
 
I have hit the zone button by mistake before.
It steps through the 4 US time zones.
"Bob F" <bobnospam@gmail.com>: Jun 22 06:09PM -0700

N_Cook wrote:
> clock had reset itself. How to predict when this error will reoccur?
> any amelioration, plenty of LCD contrast so presumably the batteries
> are ok?
 
I have a clock that has been off by 1 or 2 hours a couple of times. I just
figured that it made a mistake interpreting the received signal, perhaps due to
interference. It has corrected by the next day each time.
N_Cook <diverse@tcp.co.uk>: Jun 23 07:14AM +0100

On 23/06/2015 02:09, Bob F wrote:
 
> I have a clock that has been off by 1 or 2 hours a couple of times. I just
> figured that it made a mistake interpreting the received signal, perhaps due to
> interference. It has corrected by the next day each time.
 
Did the errors occur overnight or during the day when you could more
likely get local interference?
Looked inside and only identifying features are these overlay numbers on
the 2 boards
ykf14547 ad085220 ad085211
otherwise little more than 2 crystals and 2 black epoxy humps over RF
end and LCD handling SM chips
thekmanrocks@gmail.com: Jun 23 01:21AM -0700

My "radio time code" system never fails: I have a shortwave
radio, tune in time signals at 5, 10, 15, or 20mHz, and set
all my clocks and watches at the beep.
 
Works like a charm!
N_Cook <diverse@tcp.co.uk>: Jun 23 09:39AM +0100

> radio, tune in time signals at 5, 10, 15, or 20mHz, and set
> all my clocks and watches at the beep.
 
> Works like a charm!
 
How do you know if there is a digital relay link somewhere in the
transmission train?
I used to rely on the teletext time that came with the VITS of analogue
TV, but all gone belly-up with digital MUX. In the UK we have the
ridiculous business of the genuine radio pips relayed onto the "radio"
sections of MUX TV, can be up to 10 seconds out via the codec delays.
"Ralph Mowery" <rmowery28146@earthlink.net>: Jun 23 10:20AM -0400

"N_Cook" <diverse@tcp.co.uk> wrote in message
news:mmb5tv$9b6$1@dont-email.me...
> TV, but all gone belly-up with digital MUX. In the UK we have the
> ridiculous business of the genuine radio pips relayed onto the "radio"
> sections of MUX TV, can be up to 10 seconds out via the codec delays.
 
If using a short wave receiver the signal is being picked up direct from a
station in the US. The only delay is the time it takes for the signal to
get to you by radio which is around the earth about 7 times in one second
and the delay of the sound from the speaker to you rear.
Both are much faster than you cn hit a button on the clock to set the time.
N_Cook <diverse@tcp.co.uk>: Jun 23 07:19AM +0100

On 20/06/2015 03:26, radiotek wrote:
> antenna wire removed and need to know where it is connected on the
> circuit bord. Even a picture showing where the FM antenna wire is on the
> circuit board would be helpful.
 
So suck it and see , holding a puffy cap. The RF end should be
localisable by general inspection, small value caps .
Phil Allison <pallison49@gmail.com>: Jun 22 10:38PM -0700

Arfa Daily wrote:
 
> Yebbut ya gotta say it is actually quite nicely made in terms of the
> soldering quality and how nicely regimented the components are on those
> strips, Phil ... :-)
 
** Interestingly, the coloured wires used appear to be silicone coated - which makes tidy soldering easy and ought to remain flexible indefinitely.
 
However, when I replaced any component on that strip using regular 60/40 solder, the previously shiny joint became very dull looking. Must be some odd brew Pb free solder they have over in Vietnam.
 
 
... Phil
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