Passive preamp buzzing?

**The Black Adder** · 01-10-2017, 11:47

I've tried Bnc connectors. They were good.. Can't say if it was an improvement over modern day RCA's Like WBT or ETI as it was a long time ago.

When I used to work in a recording studio the desk there was all BNC.. It was an analogue desk. Can't remember the make or anything but it was a very expensive one as it was all refitted shortly after I joined.

The only thin I see them used for in home audio is digital. But you can use them... I like them, they feel more secure than RCA and have a good fit.

Im sure there are lots of other options available.. So it might be good to have someone experiment say with a top notch Rca and a BNC?

Sent from my 9001X using Tapatalk

Bigman80 · 01-10-2017, 11:57

Originally Posted by The Black Adder

I've tried Bnc connectors. They were good.. Can't say if it was an improvement over modern day RCA's Like WBT or ETI as it was a long time ago.

When I used to work in a recording studio the desk there was all BNC.. It was an analogue desk. Can't remember the make or anything but it was a very expensive one as it was all refitted shortly after I joined.

The only thin I see them used for in home audio is digital. But you can use them... I like them, they feel more secure than RCA and have a good fit.

Im sure there are lots of other options available.. So it might be good to have someone experiment say with a top notch Rca and a BNC?

Sent from my 9001X using Tapatalk

Thanks for that. I was beginning to thing I was alone in my thinking

Sent from my EVA-L09 using Tapatalk

**struth** · 01-10-2017, 12:01

Originally Posted by The Black Adder

I've tried Bnc connectors. They were good.. Can't say if it was an improvement over modern day RCA's Like WBT or ETI as it was a long time ago.

When I used to work in a recording studio the desk there was all BNC.. It was an analogue desk. Can't remember the make or anything but it was a very expensive one as it was all refitted shortly after I joined.

The only thin I see them used for in home audio is digital. But you can use them... I like them, they feel more secure than RCA and have a good fit.

Im sure there are lots of other options available.. So it might be good to have someone experiment say with a top notch Rca and a BNC?

Sent from my 9001X using Tapatalk

nothing ventured as they say. I like them too. a solid fit and the better ones Ive used were or appeared to connect better without becoming welded to the socket risking damage trying to get it back off

**Arkless Electronics** · 01-10-2017, 13:35

Originally Posted by Thebiglebowski

Nope, BNC was designed for high frequency use and delivers no advantages at audio freqs.

RCA performs well above the requirements for audio and using BNC would not improve the sound quality. Your use of 'best' is nothing but your interpretation that something more complicated or expensive is better.

Just because A is more compromised than B does not mean that it cannot perform 100% of the requirements for a task.

That's entirely correct yes.

Line level audio is a generally "non critical" use for plugs and sockets, the single most critical being the input of a phono stage for MC.

We are talking at very most a couple of mA's of current (0.002A) and voltages around 1V generally. Large contact areas and very low resistance are simply not required. The only possible issue is one of diodic contamination causing partial rectification and hence distortion but this is ruled out by using gold plated connectors that don't oxidise. It applies equally to any non gold plated connector. Simply plugging and unplugging connectors a few times, with some contact cleaner for stubborn cases, will restore normal operation anyway.

BNC's are for RF as others have said, being constant impedance coaxial connectors available as 50 and 75 Ohm. Non of the factors that make them constant impedance or low loss at RF frequencies are even applicable at audio frequencies. Contact area is even less than a phono and they are a total twat to fit and vastly more expensive than phonos.... They're such a twat to fit that I could probably fit 10 phonos in the time it would take to fit one BNC!

**The Black Adder** · 01-10-2017, 14:35

No need for the language, Jez.. Could you edit your post please?

**Firebottle** · 01-10-2017, 14:51

There is one big factor that is being overlooked here, concerning practicality.

As has been mentioned the BNC and other RF connectors are made for a constant impedance. What this means is they are made to fit cable of specific sizes only. The ratio of the diameter of the inner conductor and outer shield is fixed and the connectors designed to match.

What you can't do is slap your favourite audio cable into an RF connector unless it matches the specific size for it, which audio cables generally don't do. Do you really want to use RG58 coaxial cable for your interconnects?

I've tried knocking up quick adapter leads with BNCs and it takes major surgery or lots of bodgeration to connect.

**Joe** · 01-10-2017, 14:53

Originally Posted by Firebottle

lots of bodgeration

What an excellent phrase!

**struth** · 01-10-2017, 14:58

Originally Posted by Firebottle

There is one big factor that is being overlooked here, concerning practicality.

As has been mentioned the BNC and other RF connectors are made for a constant impedance. What this means is they are made to fit cable of specific sizes only. The ratio of the diameter of the inner conductor and outer shield is fixed and the connectors designed to match.

What you can't do is slap your favourite audio cable into an RF connector unless it matches the specific size for it, which audio cables generally don't do. Do you really want to use RG58 coaxial cable for your interconnects?

I've tried knocking up quick adapter leads with BNCs and it takes major surgery or lots of bodgeration to connect.

Indeed i agree. Although that wasnt the initial point being made i dont think. It was, do they make a better contact

**Arkless Electronics** · 01-10-2017, 15:23

Originally Posted by The Black Adder

No need for the language, Jez.. Could you edit your post please?

What language? What derogatory remark apparently removed by Marco? It reads the same as I recall typing. I'm not aware of anything having been removed and I know nothing of any derogatory remark.

**Arkless Electronics** · 01-10-2017, 15:26

Originally Posted by Firebottle

There is one big factor that is being overlooked here, concerning practicality.

As has been mentioned the BNC and other RF connectors are made for a constant impedance. What this means is they are made to fit cable of specific sizes only. The ratio of the diameter of the inner conductor and outer shield is fixed and the connectors designed to match.

What you can't do is slap your favourite audio cable into an RF connector unless it matches the specific size for it, which audio cables generally don't do. Do you really want to use RG58 coaxial cable for your interconnects?

I've tried knocking up quick adapter leads with BNCs and it takes major surgery or lots of bodgeration to connect.

That's an excellent point Alan!

Why wouldn't anyone want to use RG58 for interconnects? I do

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