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Old 2nd February 2006, 08:46 PM   #11
Electrons are yellow and more is better!
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A 15 years old amp used once in a while in home environment is not an age really. Caps will last longer but if they are warm or even hot they can last about a year in harsh applications. My guess is that after 10 years you can suspect something and after 15 most caps are rather functional but 20 years or more may be a lottery. Notice I'm not talking about hot tube amps.

If the smoothing is gone you will get a huge hum if the amp will work at all.

The "thin-ness" may also be a design feature. The amp has maybe never been able to reproduce low frequence's.
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Old 3rd February 2006, 01:04 PM   #12
beppe61 is offline beppe61  Italy
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[QUOTE]Originally posted by peranders
[B] ...

Dear Mr . Peranders,
thank you so much for your always kind and precious replies.
> If the smoothing is gone you will get a huge hum if the amp will work at all....
- Luckily is not my case. No hum at all. so the filter caps should work.
> The "thin-ness" may also be a design feature.
The amp has maybe never been able to reproduce low frequence's.
- And this sounds really unbelievable to me.
So unbelievable that I take the liberty to send you a copy of the service manual of the amp to very kindly ask you to see if there is anything limiting the bass response.

Thank you so much.
Kind regards,

beppe
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Old 3rd February 2006, 01:11 PM   #13
beppe61 is offline beppe61  Italy
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Dear Mr. Peranders,

unfortunately I cannot attach any file to a private e-mail.
I would just like to ask you this anyway.
There is no coupling cap at the input of the amp.
In the feedback loop there is a 47uF/100V electrolytic cap to ground.
It would be better to change it to a 220uF or even 330uF?
Could the bass response improve ?

Thank you so much indeed.
Kind regards,

beppe
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Old 3rd February 2006, 01:19 PM   #14
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What amp type is it ?

Regards

Charles
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Old 3rd February 2006, 01:27 PM   #15
beppe61 is offline beppe61  Italy
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[QUOTE]Originally posted by phase_accurate
[B]What amp type is it ?
Regards
Charles

Dear Mr. Charles,

if you provide me with a your e-mail address where I can attach a file I will send you the Service Manual of the amp, that is a 100W/8ohm stereo power amp.
As you can understand I would prefer not to upload it here without the permission of the manufacturer.

Please let me know if you are interested to give a look.

Kind regards,

beppe
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Old 3rd February 2006, 02:01 PM   #16
Electrons are yellow and more is better!
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I can have a look, check my homepage for the email address.
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Old 3rd February 2006, 02:05 PM   #17
beppe61 is offline beppe61  Italy
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[QUOTE]Originally posted by peranders
[B]I can have a look, check my homepage for the email address.


Thank you so much dear Mr. Peranders.
I knew that Swedish people are great !
Thank you sincerely.

Kind regards,

beppe
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Old 3rd February 2006, 02:12 PM   #18
Electrons are yellow and more is better!
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[QUOTE]Originally posted by beppe61
[B]
Quote:
Originally posted by peranders
I knew that Swedish people are great !
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Old 3rd February 2006, 02:13 PM   #19
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Just click the e-mail field down here !

Regards

Charles

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Old 3rd February 2006, 02:23 PM   #20
beppe61 is offline beppe61  Italy
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Quote:
Originally posted by phase_accurate
Just click the e-mail field down here !

Regards

Charles

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Ok Mr. Charles,
nevertheless I cannot attach the above mentioned file.
I do not have the permission to do it publicly.
If you could give me an other address then I will send you the file.

Kind regards,

bg
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