Author Topic: Phillips / Mullard 12Watt  (Read 525 times)

Offline GMaestro

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Phillips / Mullard 12Watt
« on: August 01, 2017, 02:50:19 PM »














Just testing my photobucket account. These were restored and redesigned by Oom Johan Potgieter. They sound lovely.

Will be up for grabs soon.
« Last Edit: August 01, 2017, 02:52:21 PM by GMaestro »
Pretoria

Offline HBAutomation

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Re: Phillips / Mullard 12Watt
« Reply #1 on: August 01, 2017, 04:43:33 PM »
Very nice.  :clap:

So have you paid PB ?

Offline GMaestro

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Re: Phillips / Mullard 12Watt
« Reply #2 on: August 01, 2017, 05:32:23 PM »
Thanks.

No I just confirmed my account again.
Want to see now if these pics stay up or not.

So far so good.
Pretoria

Offline fredeb

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Re: Phillips / Mullard 12Watt
« Reply #3 on: August 01, 2017, 05:49:29 PM »
Do they have identical circuits and transformers ?
...evolution is the gradual development and stratification of progressive series of wholes, stretching from the inorganic beginnings to the highest level of spiritual creation.
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Offline GMaestro

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Re: Phillips / Mullard 12Watt
« Reply #4 on: August 01, 2017, 08:14:34 PM »
Yes same models. With same transformers and valves.
Oom Johan made sure they match perfectly.

They sound simply divine. Midrange is very good.
The one is a slave amp and the other one controls the volume, balance and bass, treble for both amps.

Pics to follow.
Pretoria

Offline GMaestro

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Re: Phillips / Mullard 12Watt
« Reply #5 on: August 01, 2017, 08:33:20 PM »
Front



Back side







Spare 10W Phillips monoblock- not part of the above pair: controls needs replacement. But works.



« Last Edit: August 01, 2017, 08:36:32 PM by GMaestro »
Pretoria

Offline Ampdog

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Re: Phillips / Mullard 12Watt
« Reply #6 on: August 02, 2017, 03:48:59 AM »
Just a detail:

The last photo (immediately above) is of an original model. (Where do they all come from?)

Shown on the power transformer is the mains voltage adjustment plug. It only goes to 220Vac. At that 'tap' all voltages are suibstantially too high. Checking on the power transformer itself however, there is an unused 240V tap, to which I connected permanently, removing the voltage selector altogether.

Even then the h.t was up to an over-maximum 360V for EL84 - I had to insert a series resistor.

(An even smaller detail: The amps were not simply refurbished; the circuit was redesigned and a little something added ....    :)  :)   It is not a Mullard 510.)
Audio must be the only branch of engineering where lack of basics' knowledge is considered a superior form of wisdom. (Anon)

Offline GMaestro

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Re: Phillips / Mullard 12Watt
« Reply #7 on: August 02, 2017, 06:45:49 AM »
Thanks Oom Johan.
That something extra makes these amps sound amazing.
Tested it agaisnt the original one and it doesnt come close to the ones that was redesigned.

Much appreciated!!!!
Pretoria

Offline fredeb

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Re: Phillips / Mullard 12Watt
« Reply #8 on: August 02, 2017, 09:59:45 AM »
Lemme know when you sell them - I may be interested .
...evolution is the gradual development and stratification of progressive series of wholes, stretching from the inorganic beginnings to the highest level of spiritual creation.
Jan Smuts

Offline GMaestro

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Re: Phillips / Mullard 12Watt
« Reply #9 on: August 10, 2017, 10:43:27 AM »
Yes I am thinking of selling these.

But will put them up on the sales section.

Thanks!
Pretoria