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Phil Allison[_3_] Phil Allison[_3_] is offline
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** Hi all tube fans,

please enjoy this U-tube made by a most famous British audio guru.

Contains all you ever wanted to know about Quad's famous tube based tuners,
pre-amps and power amps from the 1960s.

Plus a tutorial on setting up your tone arm for playing LPs.

An absolute must see !!!

https://www.youtube.com/watch?v=qxT0A-UlT20





..... Phil






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Patrick Turner Patrick Turner is offline
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On Friday, 30 May 2014 22:51:13 UTC+10, Phil Allison wrote:
** Hi all tube fans,

please enjoy this U-tube made by a most famous British audio guru.

Contains all you ever wanted to know about Quad's famous tube based tuners,

pre-amps and power amps from the 1960s.

Plus a tutorial on setting up your tone arm for playing LPs.

An absolute must see !!!

https://www.youtube.com/watch?v=qxT0A-UlT20

.... Phil


I tried to watch the video where an ancient man with Yorkshire accent tried to explain about ancient Quad junk. I guess he will attract admirers, but I ain't ever gonna be one. I gave up on the man when he showed the under chassis view of a Quad-II power amp and I could see not a single original R&C part had been replaced.
Then comes his statement that the quality of the original resistors and caps were really excellent and that the resistors and caps you buy now won't even last a year.

Rather than waste any more time listening to the man, I clicked off to more urgent matters, like doing a load of washing etc. I believe there might be something he said from which someone@somewhere could benefit, but I'd much rather replace much of what Peter Walker included in his tube amps.
No doubt the man is fond of the Quad radio tuners. Just about any generic AM-FM tuner which is full of chips including a Gilbert cell based stereo decoder will give better FM than the tubed Quad.

But the AM tuner of Quad is quite good, mainly because it has ONE feature rarely ever found on any other super-het AM radios or tuners, and that is the switched tertiary winding on IFT1 which extends the 455kHz IF pass band so that you get far more HF audio content than the appalling performance of many SS tuners giving 1.5kHz or many tubed radios giving 3kHz max.

In my tubed AM radio I get 9kHz AF bandwidth by means of altering the distance between IFT coils slightly closer on their formers. This makes a normal set impossible to tune properly by ear. So I made an SS based high Q filter on a small circuit board which reacts to 455kHz, and I have an op-amp detector just for this F, and a limiter, and so when the IF = 455kHz, a meter needle swings up to a maximum, to tell you when the radio is tuned properly. This works far better than any tuning eye meter which works from the AVC voltage.
So every time I tune, I can get my radio IF to be 455khz, +/- 500Hz and the sound from local Radio National 845, or 2CY, is often better than from a good 1970s Pioneer FM tuner.

Quad could have done much more to improve AM reception, but then maybe nobody would have appreciated the efforts, let alone pay the extra for them.
Later, of course, as Poms got slightly better off after 1960s they could afford the better offerings of Quad using all SS and chips.

I can't wait to gut another pair of Quad-II amps and install a far better circuit.

Patrick Turner.



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Phil Allison[_3_] Phil Allison[_3_] is offline
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"Patrick Turneroid "

** Hi all tube fans,

please enjoy this U-tube made by a most famous British audio guru.

Contains all you ever wanted to know about Quad's famous tube based
tuners,

pre-amps and power amps from the 1960s.

Plus a tutorial on setting up your tone arm for playing LPs.

An absolute must see !!!

https://www.youtube.com/watch?v=qxT0A-UlT20


I tried to watch the video where an ancient man with Yorkshire accent
tried to explain about ancient Quad junk.
I guess he will attract admirers, but I ain't ever gonna be one. I gave up
on the man when he showed the under chassis view of a Quad-II power
amp and I could see not a single original R&C part had been replaced.

** Ever hear the saying that begins: " If it aint broke .... "


I can't wait to gut another pair of Quad-II amps and install a far better
circuit.


** Pat should be very thankful that the crime of sacrilege has been
abolished.

Wot an utter ass.


.... Phil


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[email protected] ohger1s@gmail.com is offline
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On Friday, May 30, 2014 8:51:13 AM UTC-4, Phil Allison wrote:
** Hi all tube fans,



please enjoy this U-tube made by a most famous British audio guru.



Got about 6 minutes into it. Just can't stand that accent a second more..
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mick mick is offline
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On Fri, 13 Jun 2014 16:03:30 -0700, ohger1s wrote:

On Friday, May 30, 2014 8:51:13 AM UTC-4, Phil Allison wrote:
** Hi all tube fans,



please enjoy this U-tube made by a most famous British audio guru.



Got about 6 minutes into it. Just can't stand that accent a second
more..



Do I get a prize? I managed to struggle through right to the bitter end
and it didn't affect me a bit. Thanks to the cheese in my ears. Burble
wurble.....




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John L Stewart John L Stewart is offline
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Location: Toronto
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Quote:
Originally Posted by Phil Allison[_3_] View Post
** Hi all tube fans,

please enjoy this U-tube made by a most famous British audio guru.

Contains all you ever wanted to know about Quad's famous tube based tuners,
pre-amps and power amps from the 1960s.

Plus a tutorial on setting up your tone arm for playing LPs.

An absolute must see !!!

https://www.youtube.com/watch?v=qxT0A-UlT20





..... Phil
In spite of what folks may think Quad was a financial success for many years. Probably moreso than any of the detractors here.

Financial success speaks volumes in itself. My thoughts, anyway.

John L Stewart

PS- I didn't watch the video. Now back to the ice storm cleanup with the chain saw.
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Phil Allison[_3_] Phil Allison[_3_] is offline
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"John L Stewart"
'Phil Allison

** Hi all tube fans,

please enjoy this U-tube made by a most famous British audio guru.

Contains all you ever wanted to know about Quad's famous tube based
tuners,
pre-amps and power amps from the 1960s.

Plus a tutorial on setting up your tone arm for playing LPs.

An absolute must see !!!

https://www.youtube.com/watch?v=qxT0A-UlT20


In spite of what folks may think Quad was a financial success for many
years.


** Hardly news.

Financial success speaks volumes in itself.


** Not much of a guide to good design though.

Think of Bose for example.


PS- I didn't watch the video.


** Please do for a minute or two.

It's a great example of unintended humour.



..... Phil


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John L Stewart John L Stewart is offline
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Location: Toronto
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Quote:
Originally Posted by Phil Allison[_3_] View Post
"John L Stewart"
'Phil Allison

** Hi all tube fans,

please enjoy this U-tube made by a most famous British audio guru.

Contains all you ever wanted to know about Quad's famous tube based
tuners,
pre-amps and power amps from the 1960s.

Plus a tutorial on setting up your tone arm for playing LPs.

An absolute must see !!!

https://www.youtube.com/watch?v=qxT0A-UlT20


In spite of what folks may think Quad was a financial success for many
years.


** Hardly news.

Financial success speaks volumes in itself.


** Not much of a guide to good design though.

Think of Bose for example.


PS- I didn't watch the video.


** Please do for a minute or two.

It's a great example of unintended humour.



..... Phil
BOSE is a matter of subjective choice. We have one of their Waveradios got on points for flying all over the country & spending the companies money.

It does make the Uber Gruppen Fuhrer (wife) happy so I guess by that measure BOSE gets a pass!!

Cheers to all, John
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[email protected] ohger1s@gmail.com is offline
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On Monday, June 16, 2014 10:15:46 AM UTC-4, John L Stewart wrote:

BOSE is a matter of subjective choice. We have one of their Waveradios

got on points for flying all over the country & spending the companies

money.



It does make the Uber Gruppen Fuhrer (wife) happy so I guess by that

measure BOSE gets a pass!!


I've repaired a few and found they're better built than typical consumer garbage generally available, although they're still overpriced IMO.

But as far as the sound goes, I have to agree that the Waveradio makes a fine desk/nightstand/counter top radio. If you don't try to compare it to a real audio system and evaluate it's performance in context, it's a damned fine sounding table radio.

John
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