Bigbottle MC only Valve/JFET phonostage Group Buy

[Bigman80]

Hi Oliver. Looks to be of a darned good quality. Many thanks. Kevin

Hi Kevin,

Thanks!

I did go as far as the budget would allow for PCB construction and the guys in china have done a very tidy job.

Oliver

 

[Bigman80]

New BOM!

I have found some discrepancies in the part numbers so i have double checked and updated the BOM.

Valve base recommendation now included.

View attachment BIGBOTTLE BOM 12.12.pdf

 

[shattered_dream]

Money sent

 

[Bigman80]

Money sent

Received and will be posted tomorrow!!!

Thanks!

 

[Morfeus]

I have 2 spare boards if anyone else is interested.

£30 + postage and i'll post anywhere in the world!

BOM and Build tips/pointers will be added to this thread in the very near future.

If you still have one left I would take it.

Cheers,
Heinz

 

[Bigman80]

If you still have one left I would take it.

Cheers,
Heinz

Sure, I'll be in touch!

Oliver.

 

[Bigman80]

Delivery man has been with a few little bits for the board.

May order the capacitors today too.

 

[Bigman80]

All boards are now posted except for ROBNEC!!!!!

If anyone knows of a way to get in touch with him can you give him a nudge. I need a postal addres.

ROBNEC, get in touch.

 

[Bigman80]

1 board Remains!!!

Anyone interested? £30 + postage. will post worldwide.

 

[ferret]

Hi Oliver. Pray tell what is the transformer's overall rating and the VA rating of the secondary windings? I am going to either have one custom wound, or see if I can get an R-core.

 

[Bigman80]

Hi Oliver. Pray tell what is the transformer's overall rating and the VA rating of the secondary windings? I am going to either have one custom wound, or see if I can get an R-core.

Mine is 40va

230v
SEC1 2X9V
SEC2 165V


insurance salvage cars

 

[ferret]

Hmm, thanks. I'll have to have it custom made. Can't find that in South Africa. Where did you source yours, and I presume the voltages are "cast in stone;" the closest I can find is a 2x115V pri with a 250V sec (50mA) and 2x 7.5V (1A) sec.

 

[Bigman80]

Hmm, thanks. I'll have to have it custom made. Can't find that in South Africa. Where did you source yours, and I presume the voltages are "cast in stone;" the closest I can find is a 2x115V pri with a 250V sec (50mA) and 2x 7.5V (1A) sec.

Yes, custom and cast in stone I'm afraid.

I got mine from Toriody.pl

If you drop him a message he will give you a quote.

Airlink transformers will also make one of you ask them for a price.

I am sure there are others who will do it.

Alternatively, go for two separate TX's to provide the necessary supply. Not sure that would be cheaper!

 

[ferret]

Hi Oliver, thanks. There is a company I've used for many years now in SA that can make up the transformer per spec. They even made some step-up trafos for me for the MA-3D project. Still need to finish that one. Regards, Kevin

 

[Bigman80]

No worries!

 

[ymwong]

I will take the last one if it is still availble.

PM sent.

 

[Bigman80]

I will take the last one if it is still availble.

PM sent.

It is! I have sent you a message.

Speak soon!

 

[Bigman80]

Managed to get a bit more done but now I am out of parts!!

Really nice quality bits on the BOM but I have gone for Dale in the 27K 5W position.

I am also going to change the capacitor to a JB in the C131/231 position. The one in the BOM is possibly still too big for the allocated space. I will need to re-measure the space or try and find a better sized capacitor.

Some pics!

 

[Bigman80]

BTW, if any of those guys building this have any suggestions for alternative components, let us all know.

I am happy to improve the quality!!

 

[Bigman80]

Heatsinks rested in place to check clearances.

Look good!