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Dave xxxx
Guest
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 Posted:
Thu Sep 22, 2005 2:11 pm Post subject:
Which wire is live on this radio Pye P114BQ |
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I have a very old Pye portable valve radio it runs off two batteries
One is 90 volts and the wires are marked + and -
The other battery is one and a half volts these are coloured one
white and one green
The white wire goes to the PCB the green to a micro switch, this
switches the radio on and off when you open and close the box the
radio is in
Am I right in saying green is + ?
Picture here of radio
http://www.paulplu.demon.co.uk/radio/pye002.htm
many thanks
Dave
www.davewhitter.myby.co.uk
Music is Art - Audio is Engineering
Steam is Fun
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Don Pearce
Guest
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| Posted:
Thu Sep 22, 2005 2:16 pm Post subject:
Re: Which wire is live on this radio Pye P114BQ |
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On Thu, 22 Sep 2005 09:11:27 GMT, Dave xxxx wrote:
| Quote: | I have a very old Pye portable valve radio it runs off two batteries
One is 90 volts and the wires are marked + and -
The other battery is one and a half volts these are coloured one
white and one green
The white wire goes to the PCB the green to a micro switch, this
switches the radio on and off when you open and close the box the
radio is in
Am I right in saying green is + ?
Picture here of radio
http://www.paulplu.demon.co.uk/radio/pye002.htm
many thanks
Dave
www.davewhitter.myby.co.uk
Music is Art - Audio is Engineering
Steam is Fun
|
Hard to say, and in all probability it doesn't much matter as it is just
switching the heaters. I imagine that the HT battery is not switched, and
just keeps the anodes permanently powered. There will be no power drain
until the heaters fire up.
d |
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Nick Gorham
Guest
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| Posted:
Thu Sep 22, 2005 2:20 pm Post subject:
Re: Which wire is live on this radio Pye P114BQ |
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Dave xxxx wrote:
| Quote: | I have a very old Pye portable valve radio it runs off two batteries
One is 90 volts and the wires are marked + and -
The other battery is one and a half volts these are coloured one
white and one green
The white wire goes to the PCB the green to a micro switch, this
switches the radio on and off when you open and close the box the
radio is in
Am I right in saying green is + ?
Picture here of radio
http://www.paulplu.demon.co.uk/radio/pye002.htm
|
If all its doing is turning the radio on by heating up the fillament,
and as long as the 90v and heater supply is seperate, I don't think it
will matter.
--
Nick |
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Dave xxxx
Guest
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| Posted:
Thu Sep 22, 2005 2:51 pm Post subject:
Re: Which wire is live on this radio Pye P114BQ |
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Nick Gorham wrote:
| Quote: |
If all its doing is turning the radio on by heating up the
fillament,
and as long as the 90v and heater supply is seperate, I don't think
it
will matter.
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Sites on power supply for this type of radio say
"The LT filament supply of 1.5V" |
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Nick Gorham
Guest
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| Posted:
Thu Sep 22, 2005 3:03 pm Post subject:
Re: Which wire is live on this radio Pye P114BQ |
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Dave xxxx wrote:
| Quote: | Nick Gorham wrote:
If all its doing is turning the radio on by heating up the
fillament,
and as long as the 90v and heater supply is seperate, I don't think
it
will matter.
Sites on power supply for this type of radio say
"The LT filament supply of 1.5V"
|
Yes, thats what I meant by the heater supply.
--
Nick |
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Dave xxxx
Guest
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| Posted:
Thu Sep 22, 2005 3:17 pm Post subject:
Re: Which wire is live on this radio Pye P114BQ |
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Nick Gorham wrote:
| Quote: | Yes, thats what I meant by the heater supply.
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Will give it a go the lol |
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Engineer
Guest
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| Posted:
Sun Oct 30, 2005 7:54 pm Post subject:
Re: Which wire is live on this radio Pye P114BQ |
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" Dave xxxx" <davewhit181@removethistoemailmehotmail.com> wrote in
message news:3zuYe.113190$G8.110468@text.news.blueyonder.co.uk...
| Quote: | I have a very old Pye portable valve radio it runs off two batteries
One is 90 volts and the wires are marked + and -
The other battery is one and a half volts these are coloured one
white and one green
The white wire goes to the PCB the green to a micro switch, this
switches the radio on and off when you open and close the box the
radio is in
Am I right in saying green is + ?
|
(snip)
I don't know if green is +ve but I think the polarity of the filament
cell would affect the bias, given that one side of all the filaments
is grounded. I would be inclined to make the -ve of the filament cell
the ground side to give an average negative bias of 3/4 volt. One way
to check would be to pull out the valves (poster is from the UK!) and
use an ohmmeter on the fil. leads Do any of the battery set experts
here (not me!) think this is an issue?
Cheers,
Roger |
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