Dragon transformer
Re: Dragon transformer
Dunno.
I've got the same problem. I have a working transformer, but I'd like another one for my other Dragon (my teen son wants to mess around with it).
I'm struggling to find an (affordable) new one.
I can get a suitable transformer for about £40 and wire it up and put it in a case, but £40 is quite expensive.
It'll probably be cheaper to get a couple of transformers (one 8.5V and one 2x14.5V) and put them in a case together.
Unless someone knows a cheaper supplier of a 8.5V+2x14.5V (or similar) single transformer.
OTOH, repairing a transformer is quite hard, so if you're asking the question, it's probably not something to do...
(Potentially another alternative would be to use a PC SMPS and wire it directly to the main board, bypassing the power board in the Dragon, but I'm a bit reluctant to do that.)
I've got the same problem. I have a working transformer, but I'd like another one for my other Dragon (my teen son wants to mess around with it).
I'm struggling to find an (affordable) new one.
I can get a suitable transformer for about £40 and wire it up and put it in a case, but £40 is quite expensive.
It'll probably be cheaper to get a couple of transformers (one 8.5V and one 2x14.5V) and put them in a case together.
Unless someone knows a cheaper supplier of a 8.5V+2x14.5V (or similar) single transformer.
OTOH, repairing a transformer is quite hard, so if you're asking the question, it's probably not something to do...
(Potentially another alternative would be to use a PC SMPS and wire it directly to the main board, bypassing the power board in the Dragon, but I'm a bit reluctant to do that.)
Re: Dragon transformer
This question comes up from time to time. There is a replacement transformer solution in the wiki http://archive.worldofdragon.org/index. ... upply_unit
also discussed here: viewtopic.php?f=5&t=3416
This thread was originally about CoCo2 but has a lot of interesting information viewtopic.php?f=8&t=4947
and led to this viewtopic.php?f=8&t=4967
also discussed here: viewtopic.php?f=5&t=3416
This thread was originally about CoCo2 but has a lot of interesting information viewtopic.php?f=8&t=4947
and led to this viewtopic.php?f=8&t=4967
Re: Dragon transformer
Yep, that's the transformer that's about £40... (At least it is, anywhere I can find which will ship to the UK)
Re: Dragon transformer
Possibly a lot cheaper:paul wrote:It'll probably be cheaper to get a couple of transformers (one 8.5V and one 2x14.5V) and put them in a case together.
http://uk.farnell.com/pro-power/ctfcs6- ... dp/1780871
http://uk.farnell.com/multicomp/vtx-146 ... dp/1675050
Would suggest checking the supply currents before parting with money in case the transformer ratings are insufficient.
If the 5V reg runs too hot then the 9V can be dropped a bit with anti-parallel diodes.
Stew
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Re: Dragon transformer
I've modded (upgraded?) all of the power supplies on my Dragon's by replacing the internal regulator board with a small switch mode PSU (which generally are in the same price bracket as the £40 you'd pay for a new transformer). Advantage is that it gives cleaner supply rails plus has a bit more juice available for running additional disk controllers/other hardware etc.
Re: Dragon transformer
I can't find any reasonably cheap SMPS which do -5V. Does yours, or are you using a -12V to -5V converter/regulator to get the -5V?
Eg, something like this
http://www.ebay.co.uk/itm/DC5V-12V-12V- ... 2103205e23
Eg, something like this
http://www.ebay.co.uk/itm/DC5V-12V-12V- ... 2103205e23
Re: Dragon transformer
fridgemagnet, pics or it didn't happen
paul, maybe Jon had modded a Dragon 64 which takes -12V and not -5V on the motherboard.
paul, maybe Jon had modded a Dragon 64 which takes -12V and not -5V on the motherboard.
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- Posts: 89
- Joined: Mon Nov 24, 2014 8:33 pm
Re: Dragon transformer
For those doubting Tormod's out there...
That is this little beast in a D64:
http://uk.farnell.com/webapp/wcs/stores ... reId=10151
I filed out the hole which housed the original switch and fitted a spare rocker I had on the mains side.
However Tormod is correct, for a D32 the -5V rail is the issue and these aren't so readily available at least at the same price. In the end, I did pay a bit more & fitted one of these:
http://uk.farnell.com/webapp/wcs/stores ... reId=10151
Ultimately a bit of a trade off between making up a convertor yourself or just paying a bit more, in this instance I did the latter.
NB: Watch out for the prices on Farnell's site as they don't include VAT!
That is this little beast in a D64:
http://uk.farnell.com/webapp/wcs/stores ... reId=10151
I filed out the hole which housed the original switch and fitted a spare rocker I had on the mains side.
However Tormod is correct, for a D32 the -5V rail is the issue and these aren't so readily available at least at the same price. In the end, I did pay a bit more & fitted one of these:
http://uk.farnell.com/webapp/wcs/stores ... reId=10151
Ultimately a bit of a trade off between making up a convertor yourself or just paying a bit more, in this instance I did the latter.
NB: Watch out for the prices on Farnell's site as they don't include VAT!
Re: Dragon transformer
I'll believe you the day they find water on Mars...
There are some cheap switched PSUs on aliexpress (search for t-30a), but I don't know how well they would work. Search t-50a for more watts.
There are some cheap switched PSUs on aliexpress (search for t-30a), but I don't know how well they would work. Search t-50a for more watts.