Post your Solid State pics here

[ROCKMANDRAKE]

Pfm 1047 ( big brother revisited )

Hi There,

here is my very last realization :

2 X 3 watts
Ultimate quality output transformers
Only two resistors and no capacitors in the signal path.

Separated batteries power supply.

Amazing simplicity
Transfixing musicality

Gorgeous on Fostex TWEETERS

Rock

 

[jleaman]

Hi There,

here is my very last realization :

2 X 3 watts
Ultimate quality output transformers
Only two resistors and no capacitors in the signal path.

Separated batteries power supply.

Amazing simplicity
Transfixing musicality

Gorgeous on Fostex TWEETERS

Rock

More information

 

[ROCKMANDRAKE]

Pfm 1047

Hi,

everything is on the pics'

Power supply 2 X 12V 13AH

OPT

Z = 7 ohm
Secondaries = 4 & 8 ohm


Rock

 

[tinitus]

Hi,

everything is on the pics'

On your home site you mention your designs as protos

I take it we are looking at a planned commercial product ?

 

[ROCKMANDRAKE]

Pfm 1047

Hi,

every realization is a unique experience

None commercial production planned...

Rock

 

[Dr_EM]

Hi There,

here is my very last realization :

2 X 3 watts
Ultimate quality output transformers
Only two resistors and no capacitors in the signal path.

Separated batteries power supply.

Amazing simplicity
Transfixing musicality

Gorgeous on Fostex TWEETERS

Rock

A very intriguing design. I guess the transformer provides the gain and the MOSFETs (?) buffer the signal. I have seen a schematic of something like this before. The quality of those transformers will be absolutely critical to the sound of the amplifier, which ones did you use? Is this amplifier only suitable for tweeters? I guess the output impedance is too high for many bass applications.

I suppose your batteries connect with the IEC inlet, be careful who connects this amplifier up or it could be catastrophic!

 

[ROCKMANDRAKE]

Pfm 1047

Dear Sir,

this amp is fitted with bipolar tansistor ( 2SD1047 ). It don't use any

Mosfet ! Output transformers are from ACEA ( a french company

specialiazed in audio transformers ).

And YES he can drive loudspeakers ( sensitivity at least 96 db 1W 1m ).

Amazing

Rock

 

[Nrik]

Rockmandrake
Your creations are so beautyfull, it makes me wanna quit doing electronics, since I will never reach this level.
However - I think your standard is dropping if you compare with your previous work.
I found that the insulating pad is not straight ( see picture)

 

[ROCKMANDRAKE]

Pfm 1047 ( big brother revisited )

Hi,

you're absolutely right

 

[jleaman]

Hi,

you're absolutely right

Would you care to post product numbers ie the transformers ? so others can build one ? That is very VERY sexy work, GREAT JOB!

 

[ROCKMANDRAKE]

Pfm 1047

Hi,

everything ( schematic, layout... ) is on Xl files ...

I can't post them as they seem to be invalid


Don't hesitate to send to me you e-mail


Rock

 

[jleaman]

Would you mind posting a link to the manufacture / source for the transformers ?

Thanks

Jase

 

[ROCKMANDRAKE]

Pfm 1047

Hi,


acea-fr - Présentation

chairman : Mr Pierre Cazaudarré

output transformer main specifications :

Ei 56 mm
Z = 7 ohm
secondaries = 4 & 8 ohm or others values
power = 5w

Regards

Rock

 

[lowpoke]

ROCKMANDRAKE, I love it! Such an elegant design.

 

[Nrik]

Nrik Mosfet Stereo Amplifier

Goal: make it look like something you can never afford anyway.

 

[Nrik]

..What?

You don't like it?

 

[jleaman]

..What?

You don't like it?

Needs rats nest removed from inside

 

[Nrik]

Needs rats nest removed from inside

hehe - but that's what is making the music comming out.

 

[Mooly]

It reminds me a bit of the old Kudelski Nagra... it's different... but well done
http://archive.liveauctioneers.com/archive3/nyshowplace/12546/0031_3_lg.jpg

 

[Nrik]

Mooly -exactly the purpose

Actually I aimed for their current looks
http://www.nagraaudio.com/highend/index.php