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Hoping that someone can give me some information about the "types" of capacitors should be used in the circuit shown.

the only one`s I can recognise are c7    c8   &  c9   (all three with a small + to one end indicate electrolytic type).. and C1 which is a Variable Capacitor, used for tuning the radio.

If anyone has a "junk box" with the capacitors and resistors wasting space (! !).. I would much appreciate them, to "lighten your load"....  ( green stamps available for post & packing , if desired,... PM. for address )

 As regards the 9volt battery.... I assume that the negative side of the battery would be connected to "chassis" ( earth )  ? ? ? 

Thanks for help.

I help my running club with doing their racing results, but I am stumped by a problem I have discovered in an Excel database. To try to give the slower runners a chance, we 'handicap' all of the runners based on their past performance over the previous 5 years. As I enter the latest results onto this database, it may or may not ask about a runners fastest time in the last 12 months, or the last two years, or the last 5 years (it will want that fastest time and the date). I never know who it is going to ask about, nor which period it will ask about. To be able to answer these questions, I have produced an Excel database that covers the last 5 years, and as we do another race, I add that, and delete the data that is more than 5 years old. This gives me a lot of data to print off each month so that I can look for the answers to those questions. To make it easier, I introduced 6 columns where I had formulae that would hold the answers (time and date last 5 years, 2 years, etc). This works fine, making getting whichever answer easy to find, but the formulae have to be able to cope with cells that have no times in them because the runner didn't run in a race. If a runner hasn't run in any races for the last 12 months, the answers will show as '0:00:00' for the time, and '#N/A' for the date. These start to clutter the printout of the database, so I have been deleting the formulae for that runner for the two '12 months' answers (the 2 years and 5 years answers stay until they in turn go to 0:00:00, etc).

The problem I have just found is when someone restarts running these races after they have been away a long time. There is now no formulae to pick up their new times so my 'answers' have been missing the more recent times for them.

My formulae for the 12 month answers at the moment are as follows:-

=MIN(X7:AA7)

=INDEX($X$2:$AA$2,MATCH(MIN(X7:AA7),X7:AA7,0))

Is there anyone out there who could show me how to modify these formulae so that when the first formula comes up with '0:00:00' it shows on the printout as blank, but the formula is still there waiting just in case the runner restarts (ditto for the second formula, except that should be when it comes up with '#N/A'). I want these formulae to show the correct answers when the times are not 0:00:00, etc

Thanks for any help

I have ordered an upgrade from PN copper broadband to PN fibre. I have a PN modem/router on its way, but I happen to already have a Talktalk Huawei HG533 combined copper/fibre unit. Will this work with PN please? 

I'm thinking to set the HG533 unit up as a standby unit and maybe have a go at the modified firmware in the PN unit, if I can make sense of the thread in this forum.

I have just discovered - without warning - that Windows 10 Home Group has been removed by the latest update (1803) and now I cannot communicate with my home network. !  

How do I set up a network now for four compters on Windows 10 ?

Uggh !

I am having trouble with the MS Project app for ios (on  iphone 7). For some reason, the program crashes frequently when I am opening the .mpp file. 
Any ideas?

My present phone, a Microsoft Lumia435, keeps reporting that it is charging slowly, and to use the mains charger.... which gives the same report... so..... I am considering going to Carphone Warehouse, and see what upgrades they can offer me for less than a fiver.... !  Yeah I know ... cheapskate.... but this present one only cost me £2.50 from them a few years ago....

I am wondering if there is any other "memory" in the actual phone itself, apart from the memory card with all the numbers on it, (which will be transferred into the new phone) .

If so... is it possible, some way... to "wipe" that memory, before disposal back to Carphone Warehouse, in the "part exchange" process ?

I have only used this machine as a straight forward printer, for letters.... until today, when I wanted to scan and print some documents.

Eventually managed it, but only by pressing this and clicking that and making lots of restarts. 

The "on screen" instructions are not very good...  and the only way I could eventually get a printed copy was by accessing it from an automatically opened email as an attachment.  then I had to open the document ( attachment)  to print it.. ( I renamed it and saved it as a PDF document in Documents) for future prints ).

Is there a way, to scan and print in one operation... if so... can someone please write me a "noddy`s guide" i.e. step by step, on how to do this...     Or   even how to allocate the location  if it has to be saved first on the computer. so that it is easy to find before using the print options.

I have a Windows 10 PC with Outlook 2013 installed. I would like Outlook to start minimised when Windows starts.

Microsoft advise creating a shortcut for Outlook.exe and copying it into the startup folder.....this I did.

Now comes the strange bit.

Upon starting my PC, Outlook starts minimised most times but there were many occasions when two copies of Outlook would start minimised.

So I removed the shortcut in the startup folder and then sometimes Outlook will start up minimised, other times it won't and has to be started manually.

It's not a major inconvenience but a bit of consistency would be welcome.

hi all can  anyone tell me how password protect a doc using webmail on here

Here is a technical question for someone who understands wireless technology.  Health warning : This has nothing to do with broadband or Plusnet !  I hope this may be of interest to someone.

In my house in France I have an electric robot which cuts my grass constantly.  It roams around the garden, nibbling the grass in a random fashion, but has a digital memory so that it knows where it has NOT cut.  Its freedom to roam is limited by a wire buried in the ground all around the garden.  This wire transmits a wireless signal to stop the robot going out of bounds, and also to guide it back automatically to its charging station when the battery needs re-charging.  The robot is quite sophisticated and its memory has many features, including basic programming, a weather / rain sensor, GPS so that it can be tracked by mobile phone from the UK, GSM  so that it can be remotely instructed  (i.e. "Go Home") by mobile phone, Bluetooth so that it can be "manually driven" and programmed by the mobile phone, and basic settings like how close to the perimeter cable it should cut, zone identification and path back to the charging station etc.

This is the second season during which it has cut an acre of grass up hill and down dale in three zones without major issue.  On a couple of occasions, it has tried to commit a sexual offence with a mole-hill or two or got its knickers in a twist with a bramble, which has meant that someone has had to intervene !

However, recently there has been a major issue.  Suddenly, for no apparent reason, it has re-set itself to its default settings for some reason.  That has meant that it has also lost contact with the base station and the perimeter wire as the frequency among other things has to be set up.  There is no obvious explanation but two possibilities come to mind.

In recent years, 400 KV overhead power cables have been installed by EDF in the vicinity with huge controversy, and the nearest pylon is 350 meters away - the cables are not visible as we are in a valley fortunately and there is no line-of-sight.  As the electricity is only being exported to Spain from the new nuclear plant at Flamanville in the North of France (Normandy), it is scheduled to be upgraded to 800 KV, and this may have already happened for all I know.  This is a classic example of political hypocrisy, as Spain has outlawed nuclear energy but is willing to import electricity generated in a nuclear plant in France !  France is self sufficient in nuclear energy already, and has no need for the new plant in Normandy; however, they have built it to obtain technical development expertise of the latest technology in order to be able to sell their expertise to Eastern Europe as consultants.  But they need to find a use for the unwanted electricity, so the Spanish and UK markets are a convenient excuse.

So I am wondering whether there could have been some sort of spike from these cables, either from general use or maybe the switch-over to 800 KV which may have knocked my robot out.  So my question is ; Could this be a possibie explanation ?

The other explanation may be a little more mundane.  We have a lot of land and a local farmer keeps cows in our field.  He uses an electric fence to keep the cows in the field.  The fence is powered from the mains supply in my house by a transformer which generates a 10,000 volt electric pulse - dramatic but harmless to man or beast.  However, the system does cause interference on my Long Wave radio, which means I cannot listen to the BBC Radio 4 broadcast except by Internet Radio.  Therefore, is it possible that this interference may be affecting the robot ?  The electric fence is effectively one long antenna !

The fly in the ointment for that explanation is that the robot has worked without this fault for nearly two years, despite having the electric fence operative.  However, until three weeks ago, only one of the two fields was being grazed by the cows; this field is about 5 acres.  Recently, due to the drought, the cows were moved into our paddock which is only about half an acre, and it was while they were there that the settings on the robot suddenly changed to default.  As this paddock is so much smaller than the field, any signal from it would be more concentrated as the electric fence is substantially shorter.  Maybe this concentration of signal caused the robot to re-boot ?

In a nutshell, can anyone tell me if either of these explanations are likely to be the cause or would wireless spikes not have this sort of effect ?