Yuan Jing 6n3 tube preamp power requirements and options

[JonesySA]

Hi guys,

I am interested in building the YJ 3 tube 6n3 pre-amp.
1pc Buffer Tube 6N3 HiFi Audio Preamplifier Amplifier AC150V Transformer | eBay
I am located in Australia and would like to buy a transformer locally. Has anyone modified or improved this circuit, or able to confirm the following power requirements:
High Voltage: AC150V-0-AC150V (current 10MA)
filament voltage: AC6.3V (4A above)

It seems the cinese are making quite a few Chinese pre-amps i.e:
6N3 5670 SRPP Tube Valve Pre Amplifier Preamplifier Amplifier DIY Kit Stereo | eBay

Apart from the YJ 6n3 that some have reported success is there anything else out there of interest?
cheers

 

[lordtarquin]

I've just ordered the YJ two tube variety complete with 220v transformer for use here in the UK. I considered the 3 tube variant, but decided replacing the Chinese rectifier valve was going to be a pain due to the lack of clear european or US equivalent. I understand the 6n3 can be replaced with a 5670 valve or a Russian equivalent (can't remember the model). I'll post my findings on the site in due course.

 

[JonSnell Electronic]

6n3p is an ECC42 with different heater wiring. I keep the original 6n3p-E from Svetlana if you need any.

 

[JonesySA]

I have been looking for a local transformers rated 230/240, thus querying the power requirements of this circuit.
The YJ 3 tube requires 6.3v for the heaters, however I have seen similar circuits running from 50v-230v, where's this one requires 150v. Do these tubes operate under a large range of voltages?
I have attached a circuit below if a 'similar' design with 2x 6n3 and 6z4. I would prefer to purchased a local transformer but can't find many with 150-0-150 secondary.