M
-
Categories
-
Platforms
-
Content
The Real Andy said:It may well work, but it is very poor design.
Mike Harding said:Agreed.
Mike Harding
** Just try it Frank - you have NOT tried it.
Get two 1N4004 diodes from the same batch ( like any manufacturer
would) and TRY it.
I have - so I know.
I made over 100 guitar amps with this 25 years ago ...
- not ONE diode failed.
Phil Allison said:** That seems to be a non sequitur.
Plus irrelevant.
However well up to Andy Pambys usual standard.
The Real Andy said:I think not, seems like a fair statement to me, i'm sure many others will
agree.
batch tolerance should be termed a novice,
work without needing to worry about batch tolerance.
will know how to do this. It doesn't take a genius to work it out.
I see you have retalited with personal attacks, i guess that means i am
right.
How would I measure the current in each diode without introducing load
sharing resistors (which would disturb the circuit being measured)?
A 26 (?) year old novice could be forgiven for making this sort of
mistake, but not a professional design engineer.
Phil Allison said:** If it works well then ipso faco it is not poor design.
Anyone who designs a circuit with components that rely on
** Done all the time in analogue design.
Matched input fets, matched output devices operating in
parallel - all batch matched.
** Get stuffed !!
** Get stuffed !!
** What pompous drivel - but normal for Andy.
The Real Andy said:If thats the case, then those speakers that came with your computer are not
poor design, they work. Becasue it works, doesn't mean its good design, you
know this yourself.
they can hear the difference.
I rest my case.
Hmmm, the words "Sansui amp" and "parallel" have jogged my memory. I
recently repaired a Sansui model AU-4900 amp whose only fault was a
failure of several diodes in the power supply rectifier. This was not
surprising given that the designer had constructed a bridge using
eight 1A diodes arranged in four parallel pairs. I always thought that
Sansui was an up-market brand, but after seeing this basic design
error it appears that they are no better than the rest.
It seems you alter your stance to suit the occasion.
Phil Allison said:** The alleged "crime" of using power diodes in parallel is very
minor - if a crime at all.
My remark must be seen in that light.
IMO.The plastic chassis with inadequate heatsinks every semi over run
to the wall amps they released in the 80s constitutes a hanging offense
Trevor Wilson said:**It's just characteristic of the company. Which was my point in the first
place.
**I did.
IMO.
**Wasn't that part of my original complaint about Sansui amps? Pastic
chassis parts and stupid output device mounting systems (amongst a whole
host of other stuff). It's what I said in the first place. Sansui was at the
forefront of churning out crappy hi fi, during the late 70s and 80s. That
was when they destroyed their reputation.
** Is that the best you can do ??
The Real Andy said:You have given plenty of examples of poorly designed equipment in this NG
that worked. The speaker example was the first one that came to my mind. You
are either a hypocrit or you have no concept of electronics design in which
case you could be forgiven for thinking that a working circuit is not a poor
design
Phil Allison said:** Seems it was.
Oh well.
................ Phil
The Real Andy said:Such a smug reply..............