Hello,
I am searching information about the transformer
(currents) for the SA 3000.
Can someone help me. many thanks
PS: how can I post images here
I am searching information about the transformer
(currents) for the SA 3000.
Can someone help me. many thanks
PS: how can I post images here
Did you intend to post to a specific vendor forum rather than the general forums? (tube/valves forum for example?)
you click 'go advanced' when posting and then you get an option to upload images. User Anatech on here knows more about counterpoint than most so one we know your exact question you should be able to get an answer.
Bill
Bill
Hi susannsusann,
What is the problem you are having? I've never even heard of one failing. You have PM
-Chris
What is the problem you are having? I've never even heard of one failing. You have PM
-Chris
Hi Chris,
thanks for your answer.
Yes, I need a new transformer, mine is fired a primary 120VAC.
Unfortunately I have no current information, and I can not be more testing. thanks
thanks for your answer.
Yes, I need a new transformer, mine is fired a primary 120VAC.
Unfortunately I have no current information, and I can not be more testing. thanks
Hi susannsusann,
Your transformer should be a dual primary which can be wired for 240 VAC, so you shouldn't need a new transformer. There is another way to go about this. Buy a 240 to 120 V step down transformer and everything will be well.
Two options, neither needs a new power transformer.
-Chris
Your transformer should be a dual primary which can be wired for 240 VAC, so you shouldn't need a new transformer. There is another way to go about this. Buy a 240 to 120 V step down transformer and everything will be well.
Two options, neither needs a new power transformer.
-Chris
OK, but a step down transformer I did not want to install.
The place is not big enough.
Can you not tell me what I need the currents, thanks
The place is not big enough.
Can you not tell me what I need the currents, thanks
SA-3000 Transformer burnt
Susansusan, did you get a new one ?
I also have a burnt tranformer.
Can you give me any information on how to get a new one ?
Susansusan, did you get a new one ?
I also have a burnt tranformer.
Can you give me any information on how to get a new one ?
Last edited:
Hi susann,
I just looked at an SA-3000 and measured the raw DC after the rectifier. It runs at 377 volts with 120 VAC input. The regulated output is 245 volts. The bipolar supplies (raw) deliver 22.5 volts plus and minus and the heater is 13.1 volts (too high I think). I don't have the current draws yet, but the HV looks like 50 mA of actual draw. I haven't measured this, but that is a common HV draw for this brand. You would benefit from making the transformer a little more robust and dropping the heater voltage a little. It's running 6.3 volt heaters from 13.1 volts. That is a lot of wasted energy that also heats the transformer.
I hope that helps you out a little. I will have this preamplifier for a short while, so I may be able to get you more information later.
-Chris
I just looked at an SA-3000 and measured the raw DC after the rectifier. It runs at 377 volts with 120 VAC input. The regulated output is 245 volts. The bipolar supplies (raw) deliver 22.5 volts plus and minus and the heater is 13.1 volts (too high I think). I don't have the current draws yet, but the HV looks like 50 mA of actual draw. I haven't measured this, but that is a common HV draw for this brand. You would benefit from making the transformer a little more robust and dropping the heater voltage a little. It's running 6.3 volt heaters from 13.1 volts. That is a lot of wasted energy that also heats the transformer.
I hope that helps you out a little. I will have this preamplifier for a short while, so I may be able to get you more information later.
-Chris
SA-3000 Transformer burnt
Mine has burnt; I also need a new one / or get the current information to build it in a local facility.
Mine has burnt; I also need a new one / or get the current information to build it in a local facility.
A transformer from AskJanFirst, the TRA803, is possibly usable with some mod's.
I have no schematic so difficult to say for shure.
Mona
I have no schematic so difficult to say for shure.
Mona