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Re: Taming tweeters . . . (thread)

uk.rec.audio

Posted: 7 Hours 40 Minutes ago by: RJH

Ah thanks - I'd assumed 8 (wrongly) for the calculations I'll see if I can manage a basic diagram. Yes, I'd much prefer to do that, especially if changes involved simply swapping out one or both of the resistors on that board. I'll se

Re: Taming tweeters . . . (thread)

uk.rec.audio

Posted: 7 Hours 47 Minutes ago by: RJH

https://pmc-speakers.com/products/archive/archive/db1-0

Re: Taming tweeters . . . (thread)

uk.rec.audio

Posted: 17 Hours 14 Minutes ago by: Phil Allison

=========> ** The data shows it's resistive, 6 ohms in the x-over region ( 3kHz) ** A schem would be nice... Passive x-over design and optimising is what hi-fi speaker engineers do for a living, It ain't just cobbled together. La

Re: Taming tweeters . . . (thread)

uk.rec.audio

Posted: 20 Hours 57 Minutes ago by: Don Pearce

The only D81s I can find are in-ceiling full range speakers. Do you have any better info? d

Re: Taming tweeters . . . (thread)

uk.rec.audio

Posted: 21 Hours 55 Minutes ago by: RJH

Thanks - I was going to guess as I don't know the figures for the woofer, and if I did, wouldn't know what to do with them. The tweeter is this: https://willys-hifi.com/products/scanspeak-d2606-922000-tweeter Sensitivity of 91.4dB The

Re: Taming tweeters . . . (thread)

uk.rec.audio

Posted: 22 Hours 58 Minutes ago by: Don Pearce

The L-pad is the right way to do this. Slope controls will lead to a lack of top end. But you should preferably measure the attenuation you need, or at worst use the sensitivity figures for the bass and tweeter drivers to estimate. When

Taming tweeters . . .

uk.rec.audio

Posted: 23 Hours 38 Minutes ago by: RJH

I've built some boxes to house some (what I think) are PMC DB1 drivers and crossovers. Generally they sound very good, although the treble is too prominent. I can correct this quite effectively with the slope controls on a Quad preamplifie

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 3 Days 18 Hours ago by: Trevor Wilson

**The worst I've seen goes to Chinese crap. One product that landed on my bench had a power transformer that saturated at around 200VAC. **YIKES! Don't get me started about WA. When I was at Marantz, our Perth service agent would orde

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 3 Days 18 Hours ago by: Phil Allison

================> ** It's a mistake I have seem many times in other gear. Some Yank transformer winders see no issue with having twin primaries on a core sized for 60Hz - ie Pacific Transformers. A 20VA example dissipated 9 wa

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 3 Days 19 Hours ago by: Don Pearce

The best were Rohde and Schwartz. But they always had non-intuitive interfaces, particularly on their spectrum analysers. You get used to control groupings that everybody pretty much shared, but R&S would always do something different.

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 3 Days 19 Hours ago by: Trevor Wilson

**YIKES! That's worse than poor quality knobs. Betcha Tektronix never made such mistakes.

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 4 Days 7 Hours ago by: Don Pearce

I do remember one aspect of crappy HP design from my days with Marconi Instruments. They designed their power supplies for 60Hz operation and neglected what happened at 50Hz if you left the things switched on for extended periods. They g

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 4 Days 17 Hours ago by: Trevor Wilson

**Already done. Squeezed in some caps that are three times the value of the originals. That said, the originals measure fine WRT stated capacitance and ESR. **The knobs are an example of (rare) really crappy HP design. **The biggest

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 4 Days 17 Hours ago by: tony sayer

In article <513c2de4-9cb2-422f-a3bf-ebdbee61fd87n@googlegroups.com>, Phil Allison <pallison49@gmail.com> scribeth thus I think that for most of us if a scope plays up and its something more complex than power supply issues then best bet is

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 4 Days 17 Hours ago by: tony sayer

In article <jdivupFgn20U1@mid.individual.net>, Trevor Wilson <trevor@rageaudio.com.au> scribeth thus Superb bit of gear got one here and tho we have a more recent equipment's its still the go to machine! Excellent meter on it, good for

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 6 Days 7 Hours ago by: Brian Gaff \(Sofa\)

Well there used to be a lot of those about, indeed one actually had two pick ups on either side. The main snag was that they tended to rumble and were none too reliable either with all their weird mechanics. I often wondered if a tilted

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 7 Days ago by: Brian Gaff \(Sofa\)

Many moons ago, when I could see, possibly late 70s, I was at a Hi Fi show near Heathrow, or was it in Hammersmith, I forget, but Sony had a turntable there which apparently had a plinth made from Granite. I did not see many takers for it

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 7 Days ago by: Andy Burns

it's vertical

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 7 Days ago by: Brian Gaff \(Sofa\)

But what is special then? Brian

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 8 Days 7 Hours ago by: Trevor Wilson

**Well, true enough. My experience with old Tek 'scopes is such that I am aware that they use very high quality switches and pots. Not one Tek 'scope I've ever owned has developed a noisy switch or pot. I've owned 4 Tek 'scopes. **I

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 8 Days 11 Hours ago by: Phil Allison

================>>> ** The term " reliable " can only be used in the past tense. Think about it. ** Wonder what the other 10% is ? That needs a 4 ch 100MHz scope ? ** Used to be " reliable " once - eh ? ** Th

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 8 Days 12 Hours ago by: Trevor Wilson

**First off: My Rigol 1054z DSO does 90% of what I need (and a whole lot more than that). So, there's that. My Tek 2232 recently lost one vertical channel. It has had some annoying issues relating to bot-up for quite some time. I will

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 9 Days 1 Hour ago by: Dave Plowman (News)

You really should stop playing with yourself and get a decent night's sleep?

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 9 Days 3 Hours ago by: Phil Allison

========================> >> ** Yawnnnnnnnnnnnnnnnnnnnnnnnnnnnn.... He nicked it from the BBC one night. ** Which is next to fucking nothing, cos Plowhorse is not any kind of tech. ** Tell the TW troll that - cos

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 9 Days 4 Hours ago by: Dave Plowman (News)

My Tek scope was the TV industry standard about 50 years ago. Does everything I need (in a fixed position) so why spend money just for the sake of it?

Re: tap tap.. (thread)

uk.rec.audio

Posted: 9 Days 5 Hours ago by: Jim Lesurf

Alas, most website builders use some form of software to 'build' pages whilst having no clue what this produces in terms of page code. So build what works for them or their main audience. Things get worse as the range of 'devices' widens

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 9 Days 5 Hours ago by: Jim Lesurf

Well, I could say I object to paying to get into, say, a concert when I didn't enjoy the music. Ditto for some museums, galleries, etc. But the reality is that you have to pay to find out. Yes, it would be nice if it were 'free', but bea

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 9 Days 13 Hours ago by: Phil Allison

================> > Phil Allison wrote: ** I was commenting on the scope. Plus the fools who drool over them.

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 9 Days 13 Hours ago by: Trevor Wilson

**Why? I've used a series of Tek 'scopes for many years. I find them to be reliable and easy to use. Not so easy to fix, mind you.

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 9 Days 17 Hours ago by: Phil Allison

============TW bullshitted ** Perfect, nut case collector's item. ** Then you became totally insane. ** What would YOU know about reality ? ( snip piles of diarrhoea coming out the back of JL's hobby horse ) BTW the nag i

Re: tap tap.. (thread)

uk.rec.audio

Posted: 9 Days 20 Hours ago by: Brian Gaff \(Sofa\)

Oh, I have no idea really, as its all down to the API the browser exposes to screenreaders I think. I'm not sure where to point you at, but I'm sure there are technical resources out there, but the multi layers of it are a bit beyond me.

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 9 Days 22 Hours ago by: Andrew

I object to having to pay just to get *in* when there be nothing worth buying. Maybe they should make sellers add a percentage onto their prices when they make a sale and pass this percentage to the organiser. Browsers and thwarted buyers

Re: tap tap.. (thread)

uk.rec.audio

Posted: 10 Days 2 Hours ago by: Phil Allison

======================= ** FFS yaaawwwnnnn.... ** ???? ** Shame about you then. Senile, obsessed with trivial nonsense and pig ignorant. ** Any hi-fi forum that takes advertising is 110% FAKE

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 10 Days 5 Hours ago by: Jim Lesurf

I was old fashioned for a long time. But the reality now is that - for audio at least - you can get excellent USB ADCs and DACs these days. So can pretty much make up a 'test bench' using software. I don't use a 'PC' (by which I assum

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 10 Days 12 Hours ago by: Phil Allison

Trevor Wilson wrote: ================> ** Did TW read my post at all ? If he did, he took no notice of it.

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 10 Days 12 Hours ago by: Trevor Wilson

**I prefer old school test equipment too, but I realise the obvious advantages modern digital test equipment. I am presently tempted by one of these: https://w140.com/tekwiki/wiki/2245 The 'A' variant. Part of the last range of analog

Re: Distortion analysers (thread)

uk.rec.audio

Posted: 10 Days 12 Hours ago by: Phil Allison

================ ** TW likes to buy old test stuff, when it gets cheap cos it is unwanted. Since my early teens, the idea of making my own test gear was instilled - cos it was affordable and you could learn a lot from so doing. So, a

Distortion analysers

uk.rec.audio

Posted: 10 Days 16 Hours ago by: Trevor Wilson

My distortion analyser (Sound Technology 1701B) failed awhile back and the job to repair it has proven to be quite involved. As a consequence, I found a Japanese auction site, where I located a very impressive DA for reasonable money. T

Re: tap tap.. (thread)

uk.rec.audio

Posted: 11 Days 4 Hours ago by: Jim Lesurf

Can you give a URL for documents that give an outline description of the assumptions made about page format, and is the software to render this for you open source? Not an area I know much about, but ... I'm wondering if there is somethin

Re: tap tap.. (thread)

uk.rec.audio

Posted: 12 Days 3 Hours ago by: Brian Gaff

But we don't use it as text. a commonly held misconception. we rely on the same markers as you do, but navigated to by tab, b for button h for heading, and if all else fails searching the page for a string. There are also landmarks, so s

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 12 Days 5 Hours ago by: Jim Lesurf

It will generally cost them money simply to turn up and be there. As it is, they can also sell via the internet - fleabay, etc. The higher rates are for the vistors who may intend to spend a lot (who may in some cases be dealers who

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 12 Days 19 Hours ago by: Don Pearce

You should know that this is a text-only news group, so please avoid using 8-bit characters. d

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 12 Days 20 Hours ago by: Andy Burns

charge the sellers and charge the buyers, it's the modern way ...

Re: tap tap.. (thread)

uk.rec.audio

Posted: 12 Days 22 Hours ago by: Jim Lesurf

Interesting. If I view as plain text here I get this sort of result ] ] Home ] ] Forums ] ] ] discussion ] ] ] audio ] ] ] Lid up or down when playing vinyl ? ] ] Discussion in 'audio' started by Johnny72, May 2, 2022 at 2:41 PM.

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 13 Days ago by: Andrew

"Trolleys Sainsburys have politely requested that our stallholders do not use their trolleys for loading and unloading stalls. At some previous events they have kept their trolleys locked until the store opened at 10:30am. Therefore

Re: tap tap.. (thread)

uk.rec.audio

Posted: 13 Days ago by: Brian Gaff

No its full of files called img and no description. I can read the names of the contributors with h, but not apparently the subject. Some links seem to have labels, some not. I think the only way to make sense of suchpages would be to g

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 13 Days ago by: Andrew

Entry times and prices 08:30am: £20 :-( 09:30am: £12 10:30am: £7 No mention of free entry after a certain time though. The sellers should be paying the costs of running it surely ?

Re: tap tap.. (thread)

uk.rec.audio

Posted: 13 Days 3 Hours ago by: Phil Allison

========================= ** Play nicely with blood sucking vampires ? Only another vampire would ask for that.

Re: tap tap.. (thread)

uk.rec.audio

Posted: 13 Days 4 Hours ago by: Jim Lesurf

In general I suspect web forums would be an unusable nightmare for a reader who can't see clearly. I dunno about PFM in this respect, but the pages are relatively basic HTML and if you disable scripting in a browser it works without the 'w

Re: tap tap.. (thread)

uk.rec.audio

Posted: 13 Days 4 Hours ago by: Jim Lesurf

On PFM the requirement is to 'play nicely' in *personal* terms. But you can say that a lot of what people claim about magic cables, etc, etc, is drivel. And people often do explain this, erm, politely. I've done so, and am not alone. Get

Re: tap tap.. (thread)

uk.rec.audio

Posted: 13 Days 7 Hours ago by: Brian Gaff

Are these services web based or mailing list based. Anything web based is a real pain to use for me, as almost every one of them has a completely different interface and often very few keyboard shortcuts or navigational aids like headers

Re: tap tap.. (thread)

uk.rec.audio

Posted: 13 Days 17 Hours ago by: Trevor Wilson

**Does it allow advertising? If so, then I foresee problems. Here in Oz, we have a rather large audio group called Stereo.net.au. I was a prolific contributor for a number of years. However, due to a post or two, where I pointed out th

Re: tap tap.. (thread)

uk.rec.audio

Posted: 13 Days 23 Hours ago by: Jim Lesurf

That seems to be something we're stuck with forever. 8-] I generally ignore it or pop up when I fancy to point out basic facts. However PFM now has far more active positive content than usenet. e.g. the DIY section helps people to make/

Re: tap tap.. (thread)

uk.rec.audio

Posted: 14 Days 1 Hour ago by: Don Pearce

Following your recommendation I signed up to Pink Fish. When I visited the first thing I found was a flame war about the audible effects of mains cables. My feeling now is the audio is as good as it is ever going to be and there is noth

Re: tap tap.. (thread)

uk.rec.audio

Posted: 14 Days 4 Hours ago by: Jim Lesurf

I'm also still (at least in some senses) 'still here'. :-) ....although TBH I now spend more time using Pink Fish - having *finally* found a web forum thay seems good. Jim

Re: Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 14 Days 7 Hours ago by: Brian Gaff \(Sofa\)

Hmm, well, I still have old kit here, not mega old but certainly not surround sound and touch screen stuff which are of no use to me. OK I do have an Amazon Echo dot, connected but the Good old Denon tuner apmp has done we well since 19

Re: tap tap.. (thread)

uk.rec.audio

Posted: 14 Days 17 Hours ago by: Trevor Wilson

**Nope. Still here.

Kent Audiojumble Sunday 29th May [was Re: tap tap.. ] (thread)

uk.rec.audio

Posted: 14 Days 20 Hours ago by: Adrian Caspersz

Also for those in the London/Kent area... Sunday 29th May 2022 https://www.audiojumble.co.uk/ Expecting the place to be packed! It's their 30th year. Anyone else know of similar events through the UK?

Re: tap tap.. (thread)

uk.rec.audio

Posted: 14 Days 23 Hours ago by: Andrew

Someone seems to have turned the volume down in the last year or so. Perhaps the average age of people using this NG is the group most likely to have been affected by Covid ? The selection of really nice 2nd hand HiFi stuff on the BHF e

Re: Quad 520f query (thread)

uk.rec.audio

Posted: 18 Days 4 Hours ago by: Phil Allison

----------------------------- ** Re the Quad 520f ** Bugger.....

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 18 Days 5 Hours ago by: Jim Lesurf

Presumably purchased by someone who buys 'Vinyls' to put them on the wall as art objects/trophies. Then listens to music on their phone. :-) Jim

Re: Quad 520f query (thread)

uk.rec.audio

Posted: 18 Days 6 Hours ago by: Phil Allison

=============> ======================================================> ** Yes, that is an option, also a soft state PCB is too. ** That may be the case with this one. The owner is a professional guitarist - he played with the R

Re: Quad 520f query (thread)

uk.rec.audio

Posted: 18 Days 6 Hours ago by: Phil Allison

-------------------- Hi, ** Not at all. ** Zero crossing reduces the peak inrush current from a capacitor bank. HOWEVER - it makes the huge, magnetic saturation surge from the transformer primary the worst possible - every time

Re: Quad 520f query (thread)

uk.rec.audio

Posted: 18 Days 7 Hours ago by: tony sayer

In article <06f11f56-c1cf-46f2-ad46-35aecb7d9014n@googlegroups.com>, Phil Allison <pallison49@gmail.com> scribeth thus Oddly enough got a couple of them here Phil, they have input XLR's and have a small board thats got a Line transformer on

Re: Quad 520f query (thread)

uk.rec.audio

Posted: 18 Days 7 Hours ago by: Woody

Maybe a silly question Phil but many years ago I got over a switch-on surge issue on a piece of equipment by fitting a solid-state relay on the input and driving that by other means. SSRs switch on zero crossing so surely that would da

Quad 520f query

uk.rec.audio

Posted: 18 Days 11 Hours ago by: Phil Allison

Hi, have a Quad 520f in the workshop for a minor repair after 32 years of service in a home installation. I believe the owner imported it here ( Sydney) himself. It uses 3 pin XLR connectors for input and speakers, but is in no way "ba

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 18 Days 19 Hours ago by: Trevor Wilson

**Nope. And I don't care to. I owned an Ariston once (the same model that Linn copied) and it was quite nice. Better than the Linn, in fact, because it had slightly superior suspension. However, a room change and an opportunity saw me

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 19 Days 1 Hour ago by: Dave Plowman (News)

Have you seen the prices of new Linn turntables?

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 19 Days 4 Hours ago by: Trevor Wilson

**YIKES! What's next in the drive to resurrect idiotic products? A Reliant Robin for 100 Grand perhaps?

tap tap..

uk.rec.audio

Posted: 19 Days 7 Hours ago by: Brian Gaff \(Sofa\)

Has everyone vanished? Brian

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 24 Days 8 Hours ago by: Adrian Caspersz

The techmoan effect? Sold at £1,021.99

Re: Unusual Sony vinyl turntable f/s on the BHF website (thread)

uk.rec.audio

Posted: 26 Days 23 Hours ago by: Andy Burns

techmoan <https://youtu.be/AiiuboFNTA4>

Unusual Sony vinyl turntable f/s on the BHF website

uk.rec.audio

Posted: 27 Days ago by: Andrew

https://www.ebay.co.uk/itm/394030230899?hash=item5bbe082d73:g:m1EAAOSwvv9iVzbG Bidding up to £670 !

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