who doesn't believe RA re rf interference?

I am sure i have read somewhere in these forums that many believe this to be insignificant of non-existent,but i have been getting interference into my ca-audio system (2 amps,sub,blah blah) and what cured it? upgrading the phono leads with more expensive properly shielded leads

so it must be true then,or does everyone accept thats the case anyway and i am wasting another thread?

 

I don't believe a word RA says, and I dislike his marketing, I think he is treading the line and a blantant rip off merchant extraordinaire. He may be a lovely man in reality.
IMO.
Just take note of sound conventional advice re RF, and implement, and you won't go far wrong. Consult trade and academic stuff. This is accepted current knowledge, most else is pretentious.
things like medical stuff and aircraft are susceptible to this and is very important, so they will do the stuff properly. You just need to find the wires and stuff, check out farnell and other more specialist stuff. some reasonable things there.

 

is there any technical reason why a phono lead in a car should react any differently to those used in a home system? the rf interference in the car was awful,a low hum at best and a whine that increases with the revs,alternator whine i am told,but new leads sorted it.

 

probably cos its crap and cheap.

 

Hopefully, your home system doesn't feature a noisy alternator

 

I'd be surprised if you have an actual phono lead in the car - unless you're the guy who built a Dansette into his camper van

Sparks generated internally in an alternator's brushes create broadband RF. A spark-gap was specially made/chosen to send the first Morse code experiments. You can hear lightning storms on radios from perhaps across a contintent. The only source of sparks in the neighbourhood of you home stereo will be light switches, frige thermostats, etc.

 

..and in a car the boxes the interconnect links may also be (electrically) connected to the bodyshell. Then you have an earth loop with significant area, which allows local noise (from the alternator say) to couple-in very effectively, esp. since the bond to the steel shell - and the shell itself - is a fairly lousy conductor.

Back on topic - to me RA seems full of it

 

well,both earth terminals have been well and truly sanded down by my goodself,so you are all saying its not rf interference in the car,its something else,as described above?

 

No... they're saying it is RF interference. It's the alternator as described above, although in theory they should have spark suppressors across the terminals. It could even be the spark plugs themselves.

Basically every spark generates a radio pulse.


GTM

 

right,so RF exists,gets into audio leads,causes interference,so therefore RA is correct in selling well sheilded cables?

or,is it easier to get interference from a car,and in the home,its just not going to happen to the extent that he claims? or charges for?

 

Don't think there is much wrong with RA products just that he charges too much for them, some of his claims may be bold but you don't have to believe them RA is no worse than others with their claims and at least you get the oppurtunity to send them back for refund, so if the products you purchase are crap, and you don't senrd them back well tough on you.

And no I have never bought anything from RA, so no axe to grind, or reason for purchase to uphold.

Live and let Live I say.

as to interference most mains born interference goes unoticed, you then add "insert anti rf/snakeoil product here" and sound improves, so if you like your kit the way it is then stop worrying about RF and enjoy the music, if you are worried you might be missing something then borrow one of the above products and see if it makes any difference, if so buy it, if not give it back, you should never trust anyone elses view of how something sounds no matter how well intentioned, and should always try to "test drive first" nobody would spend £2k on a car without a test drive of some sort, but people on here regullarly purchase equipment Blind wther £500 or £5000 its still alot to gamble and you must have alot more money than me. I find the best way with hifi is "suck it and see" if you like it buy it no matter what anyone else says, It's your ears and your brain so you are always right.

 

I currently use a vintage Furukawa (now Furutech) FD-1010 hi-fi interconnect to link my MD Changer to my headunit in my car.

Sounds fantastic with no perceptable crackles, hum, hiss or taxi ranks coming through it.

They cost around £100 fifteen years ago. Dread to think what the equivalent would cost today.

Edit - I didnt pay for them by the way. They were free with a subscription.

 

That's one hell of a free gift!

 

Hell it was better than that, it also came with a 3m stereo gold banana plugged pair of Furukawa FS-2T14 speaker cables (worth about £60 then) too! I'm still using them in my main system. Just trim them back a little every year.

The down side was I had to take out a two year subscription to Hi-Fi Choice!

 

Do they organically grow then ?

Nice trick, beat that then WM, buy one pair and five years you'll have enough cable for a second pair free!

 

RA?

Whatever anyone says, RA is no mug, he sells better to the public than anyone else, and some of his gear is nice, the return and refund scheme is also fair.

As for RF I'm a convert to shorting out unused inputs on my amp, it makes an audible difference in an area with high interference.