Quad 306
 

Hi, I would like to get some infos on this power amp. I didn't understand
well if it's a tube or solidstate amp? How many watts has? It's enough for a
medium room with 89db floorstanding speaker?
thank you

Quad 306
 

"gunnet"

Hi, I would like to get some infos on this power amp. I didn't understand
well if it's a tube or solidstate amp? How many watts has? It's enough for
a medium room with 89db floorstanding speaker?



** Tried a Google search for that info?

The schematic:

http://www.geocities.com/quad_esl63/...c/power306.jpg

The owner's manual:

http://www.hifiengine.com/library_mo...cted_model=306


I have two 306s here at the moment.





....... Phil

Quad 306
 

gunnet wrote:
Hi, I would like to get some infos on this power amp. I didn't understand
well if it's a tube or solidstate amp? How many watts has? It's enough for a
medium room with 89db floorstanding speaker?
thank you

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less. You should not worry about it driving speakers with 89db
efficiency as this is a very common rating. Used sensibly its ok.

Regards,
Borosteve.

Quad 306
 

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less. You should not worry about it driving speakers with 89db
efficiency as this is a very common rating. Used sensibly its ok.
The seller said it was of 1997. Could it be?

Quad 306
 

"borosteve" wrote in message
ups.com...


** BEWA Google Groper IDIOT on loose !!


The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model.....


** I posted a schematic that clearly shows it IS a Current Dumper !!

Where does this ******** come from ??



but is still a very good little power amp none the less.


** It is a VERY good little * Current Dumping * amplifier.



Borosteve.


** A close relation of " Borat " maybe ??




....... Phil

Quad 306
 

"gunnet"

The seller said it was of 1997. Could it be?


** The very last examples were made in 1997 - as a simple Google search
on the number will reveal.

Got no Google on your PC ????





........ Phil

Quad 306
 

borosteve wrote:
gunnet wrote:
Hi, I would like to get some infos on this power amp. I didn't understand
well if it's a tube or solidstate amp? How many watts has? It's enough for a
medium room with 89db floorstanding speaker?
thank you

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less.


Now that would be a real surprise to the Quad people - and especially the guy that wrote the service manual for the 306 :)....and
I quote" The amplifier uses a current dumping output circuit, a Quad invention ......"
And according to Ken Kesslers book on Quad, the 306 was made between 1985 and 1995 -all 25,000 of them.

Quad 306
 

gunnet wrote:

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less. You should not worry about it driving speakers with 89db
efficiency as this is a very common rating. Used sensibly its ok.
The seller said it was of 1997. Could it be?

No it was discontinued earlier than that as there was a range called 77
came out in about 1994.
Regards,
Borosteve.

Quad 306
 

"Phil Allison" wrote in message

"gunnet"

Hi, I would like to get some infos on this power amp. I
didn't understand well if it's a tube or solidstate amp?
How many watts has? It's enough for a medium room with
89db floorstanding speaker?



** Tried a Google search for that info?

The schematic:

http://www.geocities.com/quad_esl63/...c/power306.jpg

The owner's manual:

http://www.hifiengine.com/library_mo...cted_model=306


I have two 306s here at the moment.

Which specific circuit features do you think prove that this amplifier is a
current dumping design?

Quad 306
 

Arny Krueger wrote:

"Phil Allison" wrote in message


"gunnet"

Hi, I would like to get some infos on this power amp. I
didn't understand well if it's a tube or solidstate amp?
How many watts has? It's enough for a medium room with
89db floorstanding speaker?



** Tried a Google search for that info?

The schematic:

http://www.geocities.com/quad_esl63/...c/power306.jpg

The owner's manual:

http://www.hifiengine.com/library_mo...cted_model=306


I have two 306s here at the moment.


Which specific circuit features do you think prove that this amplifier is a
current dumping design?


That would be the lack of bias current in the output transistors,
the fact that the main output transistors feed the output through
an inductor while the low-power amp feeds it through a resistor,
and all the other gubbins you find in a current dumping amp.

--
Eiron.

Quad 306
 

On Fri, 22 Dec 2006 10:41:50 -0500, "Arny Krueger"
wrote:

"Phil Allison" wrote in message

"gunnet"

Hi, I would like to get some infos on this power amp. I
didn't understand well if it's a tube or solidstate amp?
How many watts has? It's enough for a medium room with
89db floorstanding speaker?



** Tried a Google search for that info?

The schematic:

http://www.geocities.com/quad_esl63/...c/power306.jpg

The owner's manual:

http://www.hifiengine.com/library_mo...cted_model=306


I have two 306s here at the moment.

Which specific circuit features do you think prove that this amplifier is a
current dumping design?

The bridge feeding the load with an inductor in one arm, a capacitor
in the opposite arm and 2 resistors in the remaining arms.

Quad 306
 

"Eiron" wrote in message

Arny Krueger wrote:

"Phil Allison" wrote in message


"gunnet"

Hi, I would like to get some infos on this power amp. I
didn't understand well if it's a tube or solidstate
amp? How many watts has? It's enough for a medium room
with 89db floorstanding speaker?



** Tried a Google search for that info?

The schematic:

http://www.geocities.com/quad_esl63/...c/power306.jpg

The owner's manual:

http://www.hifiengine.com/library_mo...cted_model=306


I have two 306s here at the moment.


Which specific circuit features do you think prove that
this amplifier is a current dumping design?


That would be the lack of bias current in the output
transistors, the fact that the main output transistors
feed the output through an inductor while the low-power
amp feeds it through a resistor, and all the other
gubbins you find in a current dumping amp.

Thanks for the refresher. Your comments bring back what I read about current
dumping from the days of the 405.

Quad 306
 

Arny Krueger wrote:

"Eiron" wrote in message


Arny Krueger wrote:


"Phil Allison" wrote in message



"gunnet"


Hi, I would like to get some infos on this power amp. I
didn't understand well if it's a tube or solidstate
amp? How many watts has? It's enough for a medium room
with 89db floorstanding speaker?



** Tried a Google search for that info?

The schematic:

http://www.geocities.com/quad_esl63/...c/power306.jpg

The owner's manual:

http://www.hifiengine.com/library_mo...cted_model=306


I have two 306s here at the moment.


Which specific circuit features do you think prove that
this amplifier is a current dumping design?


That would be the lack of bias current in the output
transistors, the fact that the main output transistors
feed the output through an inductor while the low-power
amp feeds it through a resistor, and all the other
gubbins you find in a current dumping amp.


Thanks for the refresher. Your comments bring back what I read about current
dumping from the days of the 405.

A wonderful thing happens when L3*C8 doesn't quite equal R22*(R24+R25)

--
Eiron.

Quad 306
 

"borat-steve"
gunnet wrote:

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less. You should not worry about it driving speakers with 89db
efficiency as this is a very common rating. Used sensibly its ok.
The seller said it was of 1997. Could it be?

No it was discontinued earlier than that as there was a range called 77
came out in about 1994.


** Because the Quad 77 was an integrated amp it did not replace the 306.

( The 77 integrated was not a current dumper, by all accounts. )

Quad also made the 707 power amp at the same time - it WAS a current
dumper.




....... Phil

Quad 306
 

"Arny Krueger"

Which specific circuit features do you think prove that this amplifier is
a current dumping design?



** The 47 pF cap and the 1.5uH inductor in that output bridge network are
dead give aways - Arny.



BTW

You did not respond to my question about Marsh and Jung a few days ago on
RAT.

Arny wrote:

Marsh and Jung did a wonderful job of running the other way when we
started talking about adding reasonable controls to their purported
listening tests.

I've spoken to both about them about these issues at great length, Jung
more than Marsh.


..... they did some really bad listening tests, tests that had tremendous
potential to produce false positive results. Then abused some existing
well-known facts about capacitors to impress some poorly-educated
amateurs.


** Did either of them *ever* consider that a detailed correction or
retraction of their ( snake oil) capacitor articles was the proper &
responsible thing to do ??

Or were they both utterly devoid of ethics and only concerned for the
welfare of their undeserved reputations ??

IOW, are they are comfortably relying on the hypothesis that until you
publicly admit a mistake, you haven't made one ??




....... Phil

Quad 306
 

Got no Google on your PC ????
I've got just outlook espress working. And on internet explorer it goes just
one site. You know they don't want you to go surfing instead of working..

But "current dumper" technology what is oppesed to in the other "normal"
amplifier?

Quad 306
 

In article ,
gunnet wrote:
I've got just outlook espress working.

That's a first, then.

--
*How many roads must a man travel down before he admits he is lost? *

Dave Plowman London SW
To e-mail, change noise into sound.

Quad 306
 

Dave Plowman (News) wrote:
In article ,
gunnet wrote:
I've got just outlook espress working.

That's a first, then.

I've learnt to _love_ it when you switch 'identity' with a mail open and
then it seems to close down but refuses to open the other identity!

You learn to use task manager a lot!

And I think it's _really_great_ that it downloads my news again and again.

Quad 306
 

In article ,
jasee wrote:
Dave Plowman (News) wrote:
In article ,
gunnet wrote:
I've got just outlook espress working.

That's a first, then.

I've learnt to _love_ it when you switch 'identity' with a mail open and
then it seems to close down but refuses to open the other identity!

You learn to use task manager a lot!

And I think it's _really_great_ that it downloads my news again and
again.

I'm only playing with it since I use RISC OS for news and e-mail, but
Thunderbird (free) seems so much better.

--
*Some people are alive only because it's illegal to kill them *

Dave Plowman London SW
To e-mail, change noise into sound.

Quad 306
 

In article , Dave Plowman (News)
writes
In article ,
jasee wrote:
Dave Plowman (News) wrote:
In article ,
gunnet wrote:
I've got just outlook espress working.

That's a first, then.

I've learnt to _love_ it when you switch 'identity' with a mail open and
then it seems to close down but refuses to open the other identity!

You learn to use task manager a lot!

And I think it's _really_great_ that it downloads my news again and
again.

I'm only playing with it since I use RISC OS for news and e-mail, but
Thunderbird (free) seems so much better.

It is good .. but for a newsreader you cannot beat the old Turnpike ver 5.01
program:))
--
Tony Sayer

Quad 306
 

In article ,
tony sayer wrote:
I'm only playing with it since I use RISC OS for news and e-mail, but
Thunderbird (free) seems so much better.

It is good .. but for a newsreader you cannot beat the old Turnpike ver
5.01 program:))

Yes you can - it's called Pluto 3.04c ;-)

--
*I didn't drive my husband crazy -- I flew him there -- it was faster

Dave Plowman London SW
To e-mail, change noise into sound.

Quad 306
 

"gunnet"


Got no Google on your PC ????

I've got just outlook espress working. And on internet explorer it goes
just one site. You know they don't want you to go surfing instead of
working..


** High time to get your own PC and internet access.


But "current dumper" technology what is oppesed to in the other "normal"
amplifier?


** You can do a Google search on the term and get heaps of information.

It is **YOUR ** problem if YOU do not have internet access - not ours.





......... Phil

Quad 306
 

Phil Allison wrote:
"borat-steve"
gunnet wrote:

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less. You should not worry about it driving speakers with 89db
efficiency as this is a very common rating. Used sensibly its ok.
The seller said it was of 1997. Could it be?

No it was discontinued earlier than that as there was a range called 77
came out in about 1994.


** Because the Quad 77 was an integrated amp it did not replace the 306.

( The 77 integrated was not a current dumper, by all accounts. )

Quad also made the 707 power amp at the same time - it WAS a current
dumper.




...... Phil

First of all may I say that If this is the level of intelligence and
maturity that the people on this group are caple of then this will be
my last entry.(horay I hear you morons cry!) Secondly, I was only
passing on what I was told when I went on a factory visit in 1986 by
the brother of Peter Walker (you know him?) Ross Walker. He at that
time was largely in control of the factory and gave us the low down on
the products and manufacturing processes. Now if he got it wrong.....

Borat-Borosteve.

Quad 306
 

"borosteve****ingmoronfromhell "



First of all may I say that If this is the level of intelligence and
maturity that the people on this group are caple of then this will be
my last entry.(horay I hear you morons cry!)


** Hooooooo ****ing Raaaaay !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



Secondly, I was only
passing on what I was told when I went on a factory visit in 1986 by
the brother of Peter Walker (you know him?) Ross Walker.


** False attribution is a crime - you PITA idiot !!



He at that
time was largely in control of the factory and gave us the low down on
the products and manufacturing processes. Now if he got it wrong.....


** Nope.

You ****ing did - **** brain.


Borat-Borosteve.


** At least the ****head can do parrot impersonations ...





........ Phil

Quad 306
 

On 26 Dec 2006 03:03:53 -0800, "borosteve"
wrote:

First of all may I say that If this is the level of intelligence and
maturity that the people on this group are caple of then this will be
my last entry.

The person who wrote the reply in question is well known for this
behaviour. There are some highly intelligent and knowledgeable people
who post here.

A good kill file is your friend! ;-)

--
Chris Isbell
Southampton, UK

Quad 306
 

On 26 Dec 2006 03:03:53 -0800, "borosteve"
wrote:


Phil Allison wrote:
"borat-steve"
gunnet wrote:

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less. You should not worry about it driving speakers with 89db
efficiency as this is a very common rating. Used sensibly its ok.
The seller said it was of 1997. Could it be?

No it was discontinued earlier than that as there was a range called 77
came out in about 1994.


** Because the Quad 77 was an integrated amp it did not replace the 306.

( The 77 integrated was not a current dumper, by all accounts. )

Quad also made the 707 power amp at the same time - it WAS a current
dumper.




...... Phil

First of all may I say that If this is the level of intelligence and
maturity that the people on this group are caple of then this will be
my last entry.(horay I hear you morons cry!) Secondly, I was only
passing on what I was told when I went on a factory visit in 1986 by
the brother of Peter Walker (you know him?) Ross Walker. He at that
time was largely in control of the factory and gave us the low down on
the products and manufacturing processes. Now if he got it wrong.....

Borat-Borosteve.

He's an Australian with a serious personality disorder. Just do what
everybody else here has, and killfile him.

d

--
Pearce Consulting
http://www.pearce.uk.com

Quad 306
 

"Chris Isbell"

A good kill file is your friend! ;-)



** So ** Killfile** this sub mental pommy moron immediately !!





........... Phil

Quad 306
 

"Phil Allison" wrote in message
...

"borosteve****ingmoronfromhell "



First of all may I say that If this is the level of intelligence and
maturity that the people on this group are caple of then this will be
my last entry.(horay I hear you morons cry!)


** Hooooooo ****ing Raaaaay !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



Secondly, I was only
passing on what I was told when I went on a factory visit in 1986 by
the brother of Peter Walker (you know him?) Ross Walker.


** False attribution is a crime - you PITA idiot !!



He at that
time was largely in control of the factory and gave us the low down on
the products and manufacturing processes. Now if he got it wrong.....


** Nope.

You ****ing did - **** brain.


Borat-Borosteve.


** At least the ****head can do parrot impersonations ...





....... Phil



How bloody amazing. Philthy Phil at his festive best. ROFLMAO
Nothing much changes, does it?

Quad 306
 

Chris Isbell wrote:
On 26 Dec 2006 03:03:53 -0800, "borosteve"
wrote:

First of all may I say that If this is the level of intelligence and
maturity that the people on this group are caple of then this will be
my last entry.

The person who wrote the reply in question is well known for this
behaviour. There are some highly intelligent and knowledgeable people
who post here.

A good kill file is your friend! ;-)

--
Chris Isbell
Southampton, UK

Thanks Chris, nice to know there are normal people on this forum.
Borosteve.

Quad 306
 

"borosteve"


Thanks Chris, nice to know there are normal people on this forum.
Borosteve.



** Very few normal folk are game to dwell in this audiophool lunatic asylum.

Too many smug, asinine, arrogant, PITA ,****ing pommy TURDS like YOU hang
out here.

Drop dead soon.




........ Phil

Quad 306
 

"Phil Allison" wrote in message
...

"borosteve"


Thanks Chris, nice to know there are normal people on this forum.
Borosteve.



** Very few normal folk are game to dwell in this audiophool lunatic
asylum.

Too many smug, asinine, arrogant, PITA ,****ing pommy TURDS like YOU hang
out here.

Drop dead soon.




....... Phil

So what are you doing here?
Pot, kettle, toaster, black.

Quad 306
 

Dave Plowman (News) wrote:
In article ,
jasee wrote:
Dave Plowman (News) wrote:
In article ,
gunnet wrote:
I've got just outlook espress working.

That's a first, then.

I've learnt to _love_ it when you switch 'identity' with a mail open and
then it seems to close down but refuses to open the other identity!

You learn to use task manager a lot!

And I think it's _really_great_ that it downloads my news again and
again.

I'm only playing with it since I use RISC OS for news and e-mail, but
Thunderbird (free) seems so much better.


Always wanted to play with it but the hardware is unobtanium in the
US. Can't be as cool as a Symbolics Lisp Machine though, can it?

Quad 306
 

Phil Allison wrote:
"borosteve****ingmoronfromhell "



First of all may I say that If this is the level of intelligence and
maturity that the people on this group are caple of then this will be
my last entry.(horay I hear you morons cry!)


** Hooooooo ****ing Raaaaay !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



Secondly, I was only
passing on what I was told when I went on a factory visit in 1986 by
the brother of Peter Walker (you know him?) Ross Walker.


** False attribution is a crime - you PITA idiot !!



He at that
time was largely in control of the factory and gave us the low down on
the products and manufacturing processes. Now if he got it wrong.....


** Nope.

You ****ing did - **** brain.


Phil Allison is the biggest **** on Usenet.

CDRE Bret Ludwig

Quad 306
 

Mike Coatham wrote:
borosteve wrote:
gunnet wrote:
Hi, I would like to get some infos on this power amp. I didn't understand
well if it's a tube or solidstate amp? How many watts has? It's enough for a
medium room with 89db floorstanding speaker?
thank you

The Quad 306 is a 50wpc solid state power amp from the 1980's to early
90's. It did not use the more common current dumping technology of the
larger 405 or 606 model but is still a very good little power amp none
the less.


Now that would be a real surprise to the Quad people - and especially the guy that wrote the service manual for the 306 :)....and
I quote" The amplifier uses a current dumping output circuit, a Quad invention ......"
And according to Ken Kesslers book on Quad, the 306 was made between 1985 and 1995 -all 25,000 of them.

An expensive book.

The current dumping Quad amps were horrid stock but the concept was
good and some modified ones i have heard sound very good. I'd like to
build one from scratch someday.

Quad 306
 

In article .com,
Bret Ludwig wrote:
I'm only playing with it since I use RISC OS for news and e-mail, but
Thunderbird (free) seems so much better.

Always wanted to play with it but the hardware is unobtanium in the
US.

There is an emulator available which allows most of the progs to be run on
a PC. Or get a secondhand machine shipped from the UK - plenty on Ebay.
They tend to be very reliable.

Can't be as cool as a Symbolics Lisp Machine though, can it?

It had a rather larger share of the UK market at one time. And is still
being actively developed in both hardware and software. I stick with it
for the things it does better than a PC - or more likely to save having to
learn new software for 'old' tasks.

--
*Modulation in all things *

Dave Plowman London SW
To e-mail, change noise into sound.