Bigbottle Phonostage Builders thread.

[Ryssen]

Sylvania then are they any good,little lower price:
NOS Sylvania PCC88 / 7DJ8 tubes, new in box !!! | eBay

 

[Bigman80]

Never tried them

 

[Marra]

A couple of pics of my build with the James "O" core fitted. Many thanks to Oliver; Alan and Craig for this excellent phono stage which has enhanced my vinyl listening pleasure with it's dynamics and soundstage.

 

[mhenschel]

Looks good. The yellow braid is a nice touch.

Does the transformer meet your expectations? Is there a discernible "O" core advantage?

 

[heijnsva]

Would these Telefunken pcc88 be of the right type/version/series? It states pcc88 on the box and the number 5. Thanks, Vincent

 

[Bigman80]

Would these Telefunken pcc88 be of the right type/version/series? It states pcc88 on the box and the number 5. Thanks, Vincent View attachment 887148

They are Siemans made ones. I use them

 

[heijnsva]

Thanks Oli, I'll contact the seller. Btw how do you tell they're Siemens made?

 

[Bigman80]

Thanks Oli, I'll contact the seller. Btw how do you tell they're Siemens made?

Single arm support on the Getter

 

[heijnsva]

Wow. That's eye for detail. Thanks for helping the novice.

 

[Bigman80]

Wow. That's eye for detail. Thanks for helping the novice.

No worries [emoji4]

 

[Marra]

Looks good. The yellow braid is a nice touch.

Does the transformer meet your expectations? Is there a discernible "O" core advantage?

I need to do some more listening but first impressions are favourable. It meets specification re voltages and is very quiet and professionally finished and despite having to ship from China was cheaper than my UK sourced toroidal.

 

[patrickblue]

Back to resistors again.
I seem to have found a decent source for 0.1 resistors, but they only seem to do them in .4 watt.
Will these be suitable to use in place of the .5 watt resistors

 

[Bigman80]

Back to resistors again.
I seem to have found a decent source for 0.1 resistors, but they only seem to do them in .4 watt.
Will these be suitable to use in place of the .5 watt resistors

@Vivant would be best placed to answer that.

 

[patrickblue]

Thanks Oli

 

[Vivant]

Resistors

Patrick, the only resistors in the build that need to be 0.5W are R9P and R10P.
This is to keep a 200% rating for the actual power dissipated which is good engineering practice.
As these are only supply filtering they don't need to be 0.1%, in fact 2% is fine.
If you fitted 0.4W resistors on long legs, i.e. with a gap underneath to assist in cooling then that would be fine.

Any other resistor is good at 0.4W.

 

[patrickblue]

That's brilliant, thanks very much Alan.

 

[Blues ea]

Hello. i think this is for Vivant.
I have now measured the voltages of the tube holders.V2 There are 6N2P and the jumper is in this position.V1 and V2 are 6N23P. currents are measured from 1 to 9
the results are.
V1 : 73 : 0 : 1.49 : 59.3 : 52 : 81.1 : 0 : 1.8 : 0
V2 :117.2 :-4.3To-1.2mV : 0.8 : 58.3 : 52.5 : 115 : -4.6To-0.8mV : 0.8 : 52.1
V3 : 209 : 114.8 : 120.6 : 59.4 : 52.5 : 209.8 : 112.7 : 118.4 : 0
HV is 167 ac LV is 17.7 ac
Where is the fault. or is there a fault anywhere.

 

[patrickblue]

For Oli
The BOM I'm using on google drive has a message saying "This item is in the owner's trash" and will be automatically deleted in 30 days. I assume you are the owner, and I'm unable to save it.
Is there a new version?
This is the link

BOM MM-MC - Google Sheets

 

[Bigman80]

For Oli
The BOM I'm using on google drive has a message saying "This item is in the owner's trash" and will be automatically deleted in 30 days. I assume you are the owner, and I'm unable to save it.
Is there a new version?
This is the link

BOM MM-MC - Google Sheets

Yes, I have deleted it as I needed to make some changes to it.

Send me an email address and I'll forward the most recent revision.

 

[patrickblue]

Thanks, you have a PM