So in the data sheet it says Vpin7 − V− ≥ 9V. Mine is around 5V and falling. This is an issue. The V- being positive is also an issue. Where do I go from here?
pin 7 is ground!!!
Fuses checked. The results are not good. The positive rises on startup to around 32.5V and the negative starts at about -7V and rises to about -3.5V. This is the problem. No idea what next.
you are missing the V- voltage!!! Does your transformer have a CT? Did you check the Bridge rectifier if it was connected the right way? the ~ is for the AC from transformer and the - and + are for the V- and V+ voltages
Here's the link to my transformer. Does it have a centre tab because I can only make out 2 seperate secondary coils.
Altronics - Your One Stop Audio Visual & Electronics Supplier
Altronics - Your One Stop Audio Visual & Electronics Supplier
I'm honestly not sure. Can you tell from the link I posted? Should I be connecting the 2 secondary coils in series to make 50V or just use one 25V coil?
use one secondary! White/orange or red/black. also check that bridge rectifier (position)
I'm honestly not sure. Can you tell from the link I posted? Should I be connecting the 2 secondary coils in series to make 50V or just use one 25V coil?
looking at the toroid, it's got two secondaries - red & black is one secondary, while white & orange is the other.
Have you bought a 230:25-0-25Vac transformer?
or
did you buy a 230:0-25, 0-25Vac transformer?
edit,
the altronics eventually downloaded.
You have bought a 240:0-25, 0-25Vac transformer.
This is a dual secondary transformer.
Andrew, I do not think this X has a CT!
Ok. So I'm using one secondary and the rectifier is correct. From the toroidal schematic you posted earlier perhaps I need to use both of the secondary coils to power the rectifier?
Nope! you just need one secondary for this amp, but you will need the center tap.
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