why are spring type connections disliked (receiver)?

[Anubis]

yes everyone knows that thats just what they are sold as. does nakamichi make anything anymore? for some reason i wanna say they are dead

i own a RX 505 BTW

 

[sdifox]

yes everyone knows that thats just what they are sold as. does nakamichi make anything anymore? for some reason i wanna say they are dead

i own a RX 505 BTW

Still around I think. Quality brands tend to die

 

[Auric]

One monger who sells the so-called Nakamichi ones also offers the same core part but with a plastic and thus insulated outer barrel. The lack of same is one of the obvious deficiencies of the ever pop monoprice ones.

Anyhoo, they are so cheap and only take as much time to install as using the posts once so any subsequent disconnect/connect is like a 95% dividend. Even a new receiver may well be faulty or you decide against it... in which case plugs instantly pay off.

 

[alcoholbob]

Banana plugs are more convenient, and achieve greater contact area, yes.

However, most banana plugs are gold plated, and you may know, gold's electrical resistivity is 30% greater than copper, which means in reality, power delivery is not an advantage versus spring clips.

Of course, you could use copper plated banana plugs, but those will rust just as fast as copper wire.

The only way to achieve the power transfer of copper with the oxidation properties of gold would be to forge two plates of metal together. These plugs exist, but are obviously extremely expense. Not too many people would dish out $50+ for a single banana plug.

 

[Howard]

Banana plugs are more convenient, and achieve greater contact area, yes.

However, most banana plugs are gold plated, and you may know, gold's electrical resistivity is 30% greater than copper, which means in reality, power delivery is not an advantage versus spring clips.

Of course, you could use copper plated banana plugs, but those will rust just as fast as copper wire.

The only way to achieve the power transfer of copper with the oxidation properties of gold would be to forge two plates of metal together. These plugs exist, but are obviously extremely expense. Not too many people would dish out $50+ for a single banana plug.

Man, what are you on? This kind of stuff doesn't even matter.

Besides, if you were to measure the contact resistance of a gold-plated banana plug in a binding post and the resistance of bare wire in a spring terminal, the banana plug will have way way less. If you don't know why, do a little research on electrical resistivity.

 

[alcoholbob]

Man, what are you on? This kind of stuff doesn't even matter.

Besides, if you were to measure the contact resistance of a gold-plated banana plug in a binding post and the resistance of bare wire in a spring terminal, the banana plug will have way way less. If you don't know why, do a little research on electrical resistivity.

Good one Howard. I would ask you to back up your claims, but every time I do, you disappear. You are the king of hit and run--dismiss someone's post, and then vanish when someone asks for you to substantiate your claim.

I nominate you for "King of Trolls."

 

[Fallen Kell]

if you do short it out by contacting the cables, do you blow the amp or a fuse?

Depends on the design of the amp/receiver. Good ones will go into shutdown protection mode (no fuse blown and no damage done). "Ok" designs (usually a little older) will trip an internal breaker which you will need to reset, others will blow a fuse that you need to replace. Poorly designed ones will simply fry themselves.

 

[Howard]

Good one Howard. I would ask you to back up your claims, but every time I do, you disappear. You are the king of hit and run--dismiss someone's post, and then vanish when someone asks for you to substantiate your claim.

I nominate you for "King of Trolls."

wow

i'll answer when i get home then

 

[Howard]

Nice, just lost my post somehow...

However, most banana plugs are gold plated, and you may know, gold's electrical resistivity is 30% greater than copper, which means in reality, power delivery is not an advantage versus spring clips.

What you are saying here is that gold-plated plugs suffer in terms of voltage drop and/or maximum power capacity compared to bare wires in spring terminal connections.

Consider that you start off with much less interface resistance due to the significantly higher contact area (a strongly-clamped cylinder vs a weak two-sided pinch grip). This lowers electrical resistivity and also increases the heat-sinking ability of the system which allows for higher current transfer. Also, the typical gold plating thickness of 0.06 mils contributes insignificantly to the overall electrical resistivity and actually improves contact resistance (probably insignificantly) in and of itself as the softer material conforms more easily to mating surfaces. Contrary to that, copper is less likely to deform against a mating surface and rather importantly, has a propensity to tarnish, and its various resulting compounds are not known to be good electrical conductors (silver oxide is the only example I can think of that actually is), which contributes to high contact resistance and is also one of the sources of the crackly noise one can hear with old, unmaintained systems, especially in those shitty spring terminals.

Or, you know, you could just look up the current ratings for spring terminals vs banana posts and see which one is higher. EDIT: Can't find data for spring terminals. Made in China crap, awesome. But, if you check this datasheet, http://www.alliedelec.com/Images/Pr...S-INC_INTERCONNECT-WIRE-AND-CABLE_5280155.PDF, you can see that the contact resistance for both nickel- and silver-plated banana plugs is specified at 0.01 ohms maximum... that would seem to indicate that the resistance contributed by the material is rather insignificant as silver conducts more than 4 times as well as nickel.

Of course, you could use copper plated banana plugs, but those will rust just as fast as copper wire.

You are trading an advantage for a deficiency here.

The only way to achieve the power transfer of copper with the oxidation properties of gold would be to forge two plates of metal together. These plugs exist, but are obviously extremely expense. Not too many people would dish out $50+ for a single banana plug.

A proper solder joint or even a crimp connection has no problems transferring large amounts of current (relative to a wire gauge), and neither have problems with oxidation. Also, I'm pretty sure a connection which has been "forged" together wouldn't be ordinarily separable in the first place.

Consider yourself lucky if you get an explanation from me again.

 

[quakefiend420]

nm