Looking for an audio grade toroidal transformer with goss band and screen idealy made by Canterbury Windings or similar. 240V primary 22V 0 22V or 2 x 22V secondary windings. UK only.
You might get some offers or suggestions at least, if you give us a clearer picture of the minimum required current for (presumably) that centre-tapped winding or at least the total VA rating of the required transformer. 22V windings are a custom voltage nowadays, where it was once the preferred value for unregulated +/- 30VDC rails, so it won't be easy to find among recent manufactures. I've had to use Chinese products to keep costs reasonable, as necessary for old gear.
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Why don’t you get one custom wound? I use Tiger Toroids - he’s based near Diss, Suffolk. Tell him it’s for audio and you need a stabilised core, GOSS band and inter-winding screen, cloth bound, double vacuum impregnated and potted.
I was just going to mention Tiger as well. Not used them myself but am aware of others who have and rate the service.
Thanks guys for the suggestions for Tiger Toroids which I'd not known about until now. I was going to ask Canterbury Windings but I understand he has now retired.
I am looking at putting together a second PSU for my Naim ND555 which runs from one 555PSU serving both analogue and digital sections. There are many peeps running these from two 555PSUs which is deemed to be a worthwhile upgrade but at £7.5K new or £5k used it's not a very cost effective upgrade.
It seems quite simple to just replicate the twin analogue supplies with a traffo, rectifiers, caps and two regulators. I know that the Naim transformer outputs 22-0-22V for this section which when rectified and smoothed feeds +30V-0 -30V DC into the regulators which output +22V-0--22V for the analogue section. @Ian Finch you are dead right about the voltages. I was considering trying to emulate the Naim philosophy of using massively overrated transformers as the traffo in the 555PSU looks around 800VA - 1000VA at least and some people estimate 1200VA. However, I am only using one set of outputs and a fraction of the power so was looking at about 800VA max.
By chance @Marra of this parish had a 400VA 22V dual winding Canterbury traffo for sale but I was too late to buy it. That would have made an excellent trial unit and would still be be more than adequately rated.
I am looking at putting together a second PSU for my Naim ND555 which runs from one 555PSU serving both analogue and digital sections. There are many peeps running these from two 555PSUs which is deemed to be a worthwhile upgrade but at £7.5K new or £5k used it's not a very cost effective upgrade.
It seems quite simple to just replicate the twin analogue supplies with a traffo, rectifiers, caps and two regulators. I know that the Naim transformer outputs 22-0-22V for this section which when rectified and smoothed feeds +30V-0 -30V DC into the regulators which output +22V-0--22V for the analogue section. @Ian Finch you are dead right about the voltages. I was considering trying to emulate the Naim philosophy of using massively overrated transformers as the traffo in the 555PSU looks around 800VA - 1000VA at least and some people estimate 1200VA. However, I am only using one set of outputs and a fraction of the power so was looking at about 800VA max.
By chance @Marra of this parish had a 400VA 22V dual winding Canterbury traffo for sale but I was too late to buy it. That would have made an excellent trial unit and would still be be more than adequately rated.
I've purchased from Transtronic before. They do custom jobs for audio.
https://trans-tronic.co.uk/audio-transformers/
https://trans-tronic.co.uk/audio-transformers/
Same boat here . Bought CDS3 for $100
( probably will need new VAM1202 ) without XPS . Got a Flatcap 2 for some chump change to fill it up with PSU. I will use a spare winding from FC trans to feed regs for Analog and use 2 Antek 200W toroids for digital. I don't think there is a supplier in US which custom winds transformers as described in this thread. Not even sure what such beast would cost.
( probably will need new VAM1202 ) without XPS . Got a Flatcap 2 for some chump change to fill it up with PSU. I will use a spare winding from FC trans to feed regs for Analog and use 2 Antek 200W toroids for digital. I don't think there is a supplier in US which custom winds transformers as described in this thread. Not even sure what such beast would cost.
