Is it possible to power 2 standard QLs with a single PSU if...
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Is it possible to power 2 standard QLs with a single PSU if...
... if both QLs are equipped with Teroid switching regulator ? Would the better efficiency of the switching regulator be enough to reduce power consumption by half ?
These PSU are difficult to come by so using a single one for two QLs would be nice.
What if one of these QLs has a GoldCard ? (My understanding is that the Goldcard is powered directly by the 9V coming from the PSU and has its own 7805 regulator). Would power consumption for that QL be higher than a BBQL ?
François
These PSU are difficult to come by so using a single one for two QLs would be nice.
What if one of these QLs has a GoldCard ? (My understanding is that the Goldcard is powered directly by the 9V coming from the PSU and has its own 7805 regulator). Would power consumption for that QL be higher than a BBQL ?
François
Re: Is it possible to power 2 standard QLs with a single PSU if...
You should consider also the 16V AC input divided between 2 QLs... I know the AC power requirement is very low, but would it be sufficient once split?
Re: Is it possible to power 2 standard QLs with a single PSU if...
Even if it worked for some time, I wouldn't load that good 'ol PSU with nearly twice its rated current. The switching regulators do in fact slightly reduce current input, but not that much.
Even if you made it work, you'd still be faced with the nonstandard power connector.
Stitching together a 9V-/15V~ PSU actually isn't that hard. Buy a cheap Chinese 9V PSU plus a small 240/15V print transformer. Solder/Glue that to a piece of perfboard, add a case, voila, you're done. (And still faced with no proper connector).
Tobias
Even if you made it work, you'd still be faced with the nonstandard power connector.
Stitching together a 9V-/15V~ PSU actually isn't that hard. Buy a cheap Chinese 9V PSU plus a small 240/15V print transformer. Solder/Glue that to a piece of perfboard, add a case, voila, you're done. (And still faced with no proper connector).
Tobias
ʎɐqǝ ɯoɹɟ ǝq oʇ ƃuᴉoƃ ʇou sᴉ pɹɐoqʎǝʞ ʇxǝu ʎɯ 'ɹɐǝp ɥO
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Re: Is it possible to power 2 standard QLs with a single PSU if...
The power connector is not a problem, I'll manage. Routine work for me. I understand now that the Teriod regulator is not reducing overall power consumption that much. So not a good idea.tofro wrote:Even if it worked for some time, I wouldn't load that good 'ol PSU with nearly twice its rated current. The switching regulators do in fact slightly reduce current input, but not that much.
Even if you made it work, you'd still be faced with the nonstandard power connector.
Stitching together a 9V-/15V~ PSU actually isn't that hard. Buy a cheap Chinese 9V PSU plus a small 240/15V print transformer. Solder/Glue that to a piece of perfboard, add a case, voila, you're done. (And still faced with no proper connector).
Tobias
I have thought about putting a PSU together using a 15VAC + a 9VDC PSU, but I must admit I don't know how to wire both together, i.e. 9 volt ground is common to what 15VAC wire ?? Any ? Also, what would be the required current capacity for both PSU ?
F.
Re: Is it possible to power 2 standard QLs with a single PSU if...
Common GND is in fact either side of the AC transformer output, which one doesn't matter (BTW I managed to scavenge several 12V transformers from some cheap Chinese Christmas lights my wife wanted to throw away - They seem to be a good source for this and are even outdoor rated ). The Tetroid (as well as the original) regulator will not source much more than 1, maybe 1.5A from the 9V=. I guess the AC currrent is way less, maybe 0.5A or even less.FrancoisLanciault wrote:tofro wrote:E
I have thought about putting a PSU together using a 15VAC + a 9VDC PSU, but I must admit I don't know how to wire both together, i.e. 9 volt ground is common to what 15VAC wire ?? Any ? Also, what would be the required current capacity for both PSU ?
F.
Tobias
ʎɐqǝ ɯoɹɟ ǝq oʇ ƃuᴉoƃ ʇou sᴉ pɹɐoqʎǝʞ ʇxǝu ʎɯ 'ɹɐǝp ɥO
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Re: Is it possible to power 2 standard QLs with a single PSU if...
So, is it 15VAC, 16VAC or 12 VAC that is needed? Or any of the above ?tofro wrote: Common GND is in fact either side of the AC transformer output, which one doesn't matter (BTW I managed to scavenge several 12V transformers from some cheap Chinese Christmas lights my wife wanted to throw away - They seem to be a good source for this and are even outdoor rated ). The Tetroid (as well as the original) regulator will not source much more than 1, maybe 1.5A from the 9V=. I guess the AC currrent is way less, maybe 0.5A or even less.
Tobias
Re: Is it possible to power 2 standard QLs with a single PSU if...
Francois,
I might have a last spare PSU still available. It's handmade and provides more power (2.5 Ampere or more). I've sold 4 similar PSUs. A person asked for it years ago. I may ask that person: he might no longer be interested.
I might have a last spare PSU still available. It's handmade and provides more power (2.5 Ampere or more). I've sold 4 similar PSUs. A person asked for it years ago. I may ask that person: he might no longer be interested.
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Re: Is it possible to power 2 standard QLs with a single PSU if...
Sure I would be interested, however I am located in Canada, so it needs to be 110Volts... Also shipping consideration might make the final cost quite high compared to an home brewed solution.Cristian wrote:Francois,
I might have a last spare PSU still available. It's handmade and provides more power (2.5 Ampere or more). I've sold 4 similar PSUs. A person asked for it years ago. I may ask that person: he might no longer be interested.
François
Re: Is it possible to power 2 standard QLs with a single PSU if...
BIG problemFrancoisLanciault wrote:it needs to be 110Volts
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Re: Is it possible to power 2 standard QLs with a single PSU if...
Figured it might be but thanks for the offer!Cristian wrote:BIG problemFrancoisLanciault wrote:it needs to be 110Volts