QL Power Cable
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- RWAP Master
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QL Power Cable
After the recent discussion about the power connectors, I have a QL power supply here which is untested (at the moment).... It has some sort of battery backup module inline in the power cable from the PSU to the QL - the power cord has been cut to attach to the battery backup.
The battery backup is quite heavy, so probably not worth the postage...
So, I guess I can offer the short end of the power lead for £2 plus postage - this is only about 10cm (4 inches). Otherwise you could have the power supply as well and I will test it for £5 plus postage - you could then use a standard electrical joining block to re-connect the cables, or if you want the battery backup too I can throw that in, but it will double the weight..
The battery backup is quite heavy, so probably not worth the postage...
So, I guess I can offer the short end of the power lead for £2 plus postage - this is only about 10cm (4 inches). Otherwise you could have the power supply as well and I will test it for £5 plus postage - you could then use a standard electrical joining block to re-connect the cables, or if you want the battery backup too I can throw that in, but it will double the weight..
Rich Mellor
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- vanpeebles
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Re: QL Power Cable
RWAP wrote:I have a QL power supply here which is untested (at the moment).... It has some sort of battery backup module inline in the power cable from the PSU to the QL - the power cord has been cut to attach to the battery backup.
![Arrow :arrow:](./images/smilies/icon_arrow.gif)
![Shocked :shock:](./images/smilies/icon_eek.gif)
Any chance of some photos?
![Question :?:](./images/smilies/icon_question.gif)
But don't get excited and think that I'm interested in buying it. I'm just curious
![Razz :P](./images/smilies/icon_razz.gif)
Mark
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“There are four lights!”
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
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Looking forward to summer in Somerset later in the year
![Smile :)](./images/smilies/icon_e_smile.gif)
QL, Falcon, Atari 520STFM, Atari 1040STE, more PC's than I care to count and an assortment of 8 bit micros (Sinclair and Acorn)(nearly forgot the Psion's)
Re: QL Power Cable
The pack probably contains 8-10 1.2v NiCad cells. These can take a charge and then, if power is withdrawn and the cord is still plugged in, they can maintain the QL's logic for a considerable time - great for areas where power is unreliable.
Re: QL Power Cable
Oh, fantastic, I'll have 10 packs then pleaseDave wrote:The pack probably contains 8-10 1.2v NiCad cells. These can take a charge and then, if power is withdrawn and the cord is still plugged in, they can maintain the QL's logic for a considerable time - great for areas where power is unreliable.
![Evil or Very Mad :evil:](./images/smilies/icon_evil.gif)
(Having just had the umpteenth short power cut in the high winds recently)
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Re: QL Power Cable
I once had a 8V sealed lead acid battery. I forget the Ah rating, but it was around 6 to 8Ah.
Great for powering all things that ran on 8 to 9V DC supplies out of range of the mains supply. Alas, this voltage sealed lead acid battery is not common
. Also off the shelf chargers for this voltage are just as hard to find
.
There are now cheap DC-DC converters, so you could use a regulated 12V battery charger (that produces 13.8V suitable for a sealed lead acid battery). This feeds a 12V sealed lead acid battery. Which then feeds a cheap DC-DC converter (set with the output to 9V). That can then feed a QL.
Or if the microdrives are not needed, by-pass the 7805 regulator on the QL, set the output from the DC-DC converter to 5V and you will not waste energy (battery life) as heat from the 7805 regulator.
Mark
Great for powering all things that ran on 8 to 9V DC supplies out of range of the mains supply. Alas, this voltage sealed lead acid battery is not common
![Sad :(](./images/smilies/icon_e_sad.gif)
![Sad :(](./images/smilies/icon_e_sad.gif)
There are now cheap DC-DC converters, so you could use a regulated 12V battery charger (that produces 13.8V suitable for a sealed lead acid battery). This feeds a 12V sealed lead acid battery. Which then feeds a cheap DC-DC converter (set with the output to 9V). That can then feed a QL.
Or if the microdrives are not needed, by-pass the 7805 regulator on the QL, set the output from the DC-DC converter to 5V and you will not waste energy (battery life) as heat from the 7805 regulator.
Mark
![Exclamation :!:](./images/smilies/icon_exclaim.gif)
![Exclamation :!:](./images/smilies/icon_exclaim.gif)
“There are four lights!”
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
![Exclamation :!:](./images/smilies/icon_exclaim.gif)
Looking forward to summer in Somerset later in the year
![Smile :)](./images/smilies/icon_e_smile.gif)
QL, Falcon, Atari 520STFM, Atari 1040STE, more PC's than I care to count and an assortment of 8 bit micros (Sinclair and Acorn)(nearly forgot the Psion's)
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- RWAP Master
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Re: QL Power Cable
Some pics of the battery backup....
Don't think I would risk those batteries....
Don't think I would risk those batteries....
Rich Mellor
RWAP Software
RWAP Adventures
SellMyRetro
Retro-Printer Module - add a USB printer to your QL
Also Involved in:
Icephorm
RWAP Software
RWAP Adventures
SellMyRetro
Retro-Printer Module - add a USB printer to your QL
Also Involved in:
Icephorm
Re: QL Power Cable
This was actually a commercial item if I remember right - I seem to recall a review from an old QL World (yes the one in the missing box
)
Tobias
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Tobias
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Re: QL Power Cable
Ah, a frequency precision unit. never actually seen a real live one, only in pictures.RWAP wrote:Some pics of the battery backup....
Don't think I would risk those batteries....
This was mentioned in Quanta Vol 4 Issue 8 page 23 according to the index, although I haven't a copy of that issue to hand to know what it says.
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- Mr_Navigator
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Re: QL Power Cable
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