Bigbottle Phonostage Builders thread.

[Vivant]

I doubt if is going to be more quiet, step up transformer with rectifier acts like an on/off switch which could add bit more noise to already noisy heaters , it would need to be tested in real life.

The heaters aren't noisy, there is an on board regulator.

 

[slav]

No matter what supplies used thermionic noise is always there so they’re always noisy by the nature , it’s difficult to discuss anything without circuit diagram.

 

[slav]

heaters supply is dc then?

 

[Vivant]

Yes. For a valve MC stage that's pretty vital.

This is a well proven design.

 

[slav]

I’m looking forward to building it , looking for a good source in UK to make transformer any experience?

 

[KVP]

Hello Ferret, also interested where you get this offer from. I mostly buy from audiophonics and a custom made is about 51€...

 

[Marra]

My build is slowly progressing. The heaters are glowing in the first pic but no H/T connected.

 

[ferret]

Hi ikir and KVP,
The company is called Swift Heat & Control. They are based about 75 km from my home town in the South of Johannesburg. I do not know if they export to other countries, but I can ask. I do think the cost of shipping to Europe and elsewhere would probably triple the price. I'll provide feedback.
Kevin

 

[KVP]

Thank you Ferret, in that case I suppose I will stick to audiophonics - kind regards.

 

[Bigman80]

My build is slowly progressing. The heaters are glowing in the first pic but no H/T connected.

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Looks good!

 

[slav]

My build is slowly progressing. The heaters are glowing in the first pic but no H/T connected.

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May I ask where did you order transformer from?

 

[Marra]

Oliver I had mine made by Tiger Toroids in Diss Norfolk.

Tiger Toroids is a British company offering a fast and flexible solution for transformers and sinewave inverters.

Here you go. Pretty quick turnaround from order to delivery.

 

[slav]

Here you go. Pretty quick turnaround from order to delivery.

Much appreciated

 

[Bigman80]

I’m looking forward to building it , looking for a good source in UK to make transformer any experience?

Not in the UK but TigerTorroids is looking favourable.

 

[slav]

Not in the UK but TigerTorroids is looking favourable.

Aren't they based in Suffolk

 

[Bigman80]

Aren't they based in Suffolk

Possibly?

I haven't used them, Marra has highlighted their existence

 

[Vivant]

I used them many years ago for custom transformers. Glad to know they are still in existence.

 

[Bigman80]

I used them many years ago for custom transformers. Glad to know they are still in existence.

I may drop them an enquiry.

 

[slav]

Possibly?

I haven't used them, Marra has highlighted their existence

What /who have you used then , could BOM be updated with links to different suppliers to choose from .
I'm also interested in preferred choice of vital components ie: coupling caps , RIAA resistors , caps , etc..., I don't want to skimp on quality but I won't go for expensive and very accurate Vishay z-foils as it wouldn't make much difference to RIAA accuracy , unless there is something to gain ?

 

[Bigman80]

What /who have you used then , could BOM be updated with links to different suppliers to choose from .

I'm also interested in preferred choice of vital components ie: coupling caps , RIAA resistors , caps , etc..., I don't want to skimp on quality but I won't go for expensive and very accurate Vishay z-foils as it wouldn't make much difference to RIAA accuracy , unless there is something to gain ?

The BOM does indicate the important resistors but all the 1% caps are equally as important. That could be marked up.

I can add a list of transformer builders too....once I find a few that will do one off orders.