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From: matteo on 7 May 2008 03:04
Dear all,
a frend of mine gave me a broken DBX586 preamplifier, to get
repaired. It has the power transformer out of order, with secondaries
broken.

The problem is that I can't find the specifications of the transformer
(output voltage, current), because I can't measure them.

So, I see two solutions:
1) Is there anyone who has the schematics of the DBX586 preamplifier,
with transformer output voltages reported ?
2) Or, do you know which are the specifications of the power
transformer, which is a 'Toroid' TI-65781

Many thanks in advance

Matteo
From: Elvis Kabong on 7 May 2008 03:13

"matteo" <matteo_bonino(a)virgilio.it> wrote in message
news:1b4ad655-3a6e-43b1-8a72-c29dc0ee7446(a)c58g2000hsc.googlegroups.com...
> Dear all,
> a frend of mine gave me a broken DBX586 preamplifier, to get
> repaired. It has the power transformer out of order, with secondaries
> broken.
>
> The problem is that I can't find the specifications of the transformer
> (output voltage, current), because I can't measure them.
>
> So, I see two solutions:
> 1) Is there anyone who has the schematics of the DBX586 preamplifier,
> with transformer output voltages reported ?
> 2) Or, do you know which are the specifications of the power
> transformer, which is a 'Toroid' TI-65781
>
> Many thanks in advance
>
> Matteo

ftp://ftp.dbxpro.com/pub/PDFs/discontinued/Schematics/586H%20Schematic.pdf


From: Phil Allison on 7 May 2008 03:37

"matteo"
> a frend of mine gave me a broken DBX586 preamplifier, to get
> repaired. It has the power transformer out of order, with secondaries
> broken.
>
> The problem is that I can't find the specifications of the transformer
> (output voltage, current), because I can't measure them.


** Common problem, when supply transformers are damaged.


> So, I see two solutions:
> 1) Is there anyone who has the schematics of the DBX586 preamplifier,
> with transformer output voltages reported ?
> 2) Or, do you know which are the specifications of the power
> transformer, which is a 'Toroid' TI-65781


** A link to the schem has been posted by Elvis.

But this is not much help as the original transformer ( although not shown)
is a clearly specially made part with a very unusual combination of
secondary windings.

If the dbx folk have no spares to sell - you are outa luck.



....... Phil


From: Elvis Kabong on 7 May 2008 03:41

"Phil Allison" <philallison(a)tpg.com.au> wrote in message
news:68d4i0F2sfnclU1(a)mid.individual.net...
>
> "matteo"
>> a frend of mine gave me a broken DBX586 preamplifier, to get
>> repaired. It has the power transformer out of order, with secondaries
>> broken.
>>
>> The problem is that I can't find the specifications of the transformer
>> (output voltage, current), because I can't measure them.
>
>
> ** Common problem, when supply transformers are damaged.
>
>
>> So, I see two solutions:
>> 1) Is there anyone who has the schematics of the DBX586 preamplifier,
>> with transformer output voltages reported ?
>> 2) Or, do you know which are the specifications of the power
>> transformer, which is a 'Toroid' TI-65781
>
>
> ** A link to the schem has been posted by Elvis.
>
> But this is not much help as the original transformer ( although not
> shown) is a clearly specially made part with a very unusual combination of
> secondary windings.
>
> If the dbx folk have no spares to sell - you are outa luck.
>
>
>
> ...... Phil

Hi Phil -

So he can't get it rebuilt?


From: Phil Allison on 7 May 2008 03:46

"Elvis Kabong"
> "Phil Allison"
>>
>> "matteo"
>>> a frend of mine gave me a broken DBX586 preamplifier, to get
>>> repaired. It has the power transformer out of order, with secondaries
>>> broken.
>>>
>>> The problem is that I can't find the specifications of the transformer
>>> (output voltage, current), because I can't measure them.
>>
>>
>> ** Common problem, when supply transformers are damaged.
>>
>>
>>> So, I see two solutions:
>>> 1) Is there anyone who has the schematics of the DBX586 preamplifier,
>>> with transformer output voltages reported ?
>>> 2) Or, do you know which are the specifications of the power
>>> transformer, which is a 'Toroid' TI-65781
>>
>>
>> ** A link to the schem has been posted by Elvis.
>>
>> But this is not much help as the original transformer ( although not
>> shown) is a clearly specially made part with a very unusual combination
>> of secondary windings.
>>
>> If the dbx folk have no spares to sell - you are outa luck.
>>
>>
>>
>> ...... Phil
>
> Hi Phil -
>
> So he can't get it rebuilt?


** Finding anyone able to rewind a small, special toroidal would be near
impossible. The HT winding is probably made with hair fine wire =
nightmare job.

Likely " dbx" DO have spares - the OP has not asked them for one,
AFAIK.


...... Phil



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