Beard p35mkII schematics/photo photo

[attilio.mazzone]

Hello
i have need of photos of the one beard p35mkII
photos of the inside transformers (power and output)
because my p35 have one hum noise and i think
that the power transformers was changed ... see the picture









help me...

[Jaap]

You already tried changing tubes ?

[attilio.mazzone]

no... but the noise hum in the speakers is very low, very little...
the big noise hum is in the amplifier... it comes from the power amplifier....
also when the speakers are unplugged the hum is strong...

[Jaap]

I would not advise turning the amp on without speakers connected.
It is difficult (and dangerous) to repair if you lack knowledge but it is also difficult to advise if you have no information. I would first measure voltages/current on strategic places (left and right). Something in the amp could be wrong resulting in excessive current draw. At first sight the powertransformer looks big enough for the job.
Check if your el84's do have glowing/red plates. If so change tubes first.
Measure voltages on the cathode of the el84's, perhaps a voltageregulator is dead or sick.

[Zen Mod]

these 7805 are in cathodes as CCS-es

I have schematic somewhere .... maybe I can find it tomorrow and scan ;

but - repair of that amp is still for experienced person

[attilio.mazzone]

Originally Posted by Zen Mod

these 7805 are in cathodes as CCS-es

I have schematic somewhere .... maybe I can find it tomorrow and scan ;

but - repair of that amp is still for experienced person

yes 7805 is for automatic bias...
i can not fix it myself.... but the schematic is very necessary...
in the schematic is write the value of the power transformer?

thank you very very much

[Zen Mod]

unfortunately - all I have ( and still didn't found that paper ) is sketch by hand of amplifier,without any information about xformer .

I remember there are voltages , but nothing about exact xformer .

[attilio.mazzone]

sin.. web site for buy the schematic?

[assimaki]

Originally Posted by Zen Mod

unfortunately - all I have ( and still didn't found that paper ) is sketch by hand of amplifier,without any information about xformer .

I remember there are voltages , but nothing about exact xformer .

Is the sketch available?

[analog_sa]

So you are not getting hum, but buzz, right? Schematic will be of no use for this, rather build a simple DC blocker.

270v AC 330vDC