A 500VA transformer for a 100W A/B amplifier.
You can work out the loading for ordinary listening levels of audio program material.
It is not a bad approach to engineering. It is experience. Stop being pedantic.
I really do wonder what advantage the OP hopes to gain from making these changes...
I really do wonder what advantage the OP hopes to gain from making these changes, I'd love to know what make and model of amp it is to see if I can track the changes and work out what the manufacturer achieved by making them too, looks like there's a schematic available so it could be an interesting exercise.
I really do wonder what advantage the OP hopes to gain from making these changes, I'd love to know what make and model of amp it is to see if I can track the changes and work out what the manufacturer achieved by making them too, looks like there's a schematic available so it could be an interesting exercise.
The next version of the amp had 20 watts more, a total of 120W.
How ever the schematics is almost identical, with a few changes (including two more output transistors).. And three times the capacitance (60000µF).. As I said the 100W ''edition'' had only 20000µF.. Yes there is a difference, but I still don't get that it should be big enough to 3x the power supply capacitance of the 100W amp.
There is no schematics available. I only have them available since I worked in the same company that made the amps, but I didn't work in the engineering section
Ah yes, the audiophiles' fascination with excessive capacitance and using two FWBs where one will suffice. Now how was I expecting that...
Tim
Stick to the topic, or find a different post...
If you get 50% more caps in the same space they will be 2/3 the quality, you will have things like increased ESR which is unlikely to cause a problem here (if anything help) but it just demonstrates how pointless the exercise is.
If you get 50% more caps in the same space they will be 2/3 the quality, you will have things like increased ESR which is unlikely to cause a problem here (if anything help) but it just demonstrates how pointless the exercise is.
Not necessarily!
There have been major advancements in capacitor technology. Depending on the age of this amplifier, far, far better capacitors (both performance and physical quality, longevity, etc.) may be available in the same or smaller package than the originals. Most certainly if you compare typical, older 60s, 70s, 80s capacitors to those manufactured today, you will find huge performance increases in a smaller package. It would be nice to know what amplifier he's talking about and the age of it, of course, though...
If the amplifier is reasonably old the caps have probably started to degrade at least somewhat from their original performance specifications anyway. If there is any question as to their performance currently it is most certainly justified to be replacing them, and I would do the same thing as the OP is asking. I would put in a somewhat larger-value, better quality capacitor if I could fit in in the space for this application.
Why all the hate for the OP's amplifier owner's request? It seems to be a perfectly logical and valid course of action to me. It is probably exactly what I would do if I were replacing the main filter caps in an older amplifier.
Yes that is true if they are old capacitors but information has been vague. I don't quite see the point of increasing the capacitance unless necessary.
ok so you can cram some more capacitance in, but has the owner reported an actual problem ?
once upon a time diodes would be supplied with a maximum capacitance rating they could work wih for this very reason,
hence your 20 ohm series resistors, this kit was well thought out, but apparently the owner knows more than the designer. Just make sure you apply gold coloured sticky sheet to the outside and charge him 100x the actual price of the caps and you will be ok oh and you will have to come up with a bit wank word for the new technology you have applied, do that and he will be happy
And where do you find the 20ohm series resistors??
You said there was 20 ohms and a bypass relay and you posted a diagram about the time you started to tell people to get lost and I started getting reports. The guy you told to get lost was probably the most qualified to answer your question but apparently you know it all.
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Well now that we have more information than your original post yes it is unlikely that adding more will do harm but very certain that it won't help much, I don't know in which year diodes with huge surge capabilities came about but if this was out of the 80s or earlier the answer would be a definite no, if you had not been so hasty in your dismissals of a light jibe Tim may have written you an essay in reply and left you in no doubt.best thing to do when you join a forum is not to jump on the difensive too fast. No question here is too stupid to ask but when you are clueless a bit of humility helps you go far as genuine people readily share knowledge on here if those asking are with bothering with.
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