For sale
We are “mainlytannoy” … a lot in the name !!! And over 10,000 ++
HF / Tweeter Bulb Fuse for
Tannoy, JBL, EV, Electro Voice, Convair, Bose, Peavey etc & many others.
[UPGRADE MORE PROTECTION]
This is a UPGRADE, MORE PROTECTION. Please read.
HF / tweeters bulb / fuse upgrade protection.
Upgrade from RED DOT >>> BLUE DOT.
One
[UPGRADE] Fuse / Lamp for speaker Crossovers,
as fitted many speakers crossovers including Tannoy, JBL, EV, Electro Voice,
Convair, Bose, Peavey etc & many others.
Simply, this offers more protection, especially for PA speakers and bands & people who play their speakers loud. So many speakers / amplifiers etc, that have a fuse fitted, and looks like this, is a SK3 type (its has many names). Also identified as a RED dot. There is a lesser known similar looking fuse, but has a BLUE dot.
So simply …
Most products use RED dot. A few use BLUE dot.
Upgrade from RED to BLUE gives more protection.
RED DOT.
Approx. 12V @ 2A rating. So 24 watt as a bulb.
BUT as a fuse / protection device, in Negative Temp Coefficient form,
That means as the current increases, the ohms increase = greater protection.
COLD TEMP (10 to 30 Degs C) = 0.5 ohms.
That means you have a 0.5 ohm resistor in series.
Under HOT temp conditions, its 6 ohms.
Given the HF / tweeters is 5 to 8 ohms typically, it adds a lot of safety resistance, as the power goes up.
BLUE DOT.
Approx. 12V @ 1A rating. So 12 watt as a bulb.
BUT as a fuse / protection device, in Negative Temp Coefficient form,
That means as the current increases, the ohms increase = greater protection.
COLD TEMP (10 to 30 Degs C) = 1 ohms (twice the RED dot)
That means you have a 1 ohm resistor in series.
Under HOT temp conditions, its 12 ohms (twice the RED dot).
Given the HF / tweeters is 5 to 8 ohms typically, it adds a lot of safety resistance, as the power goes up.
To summarize …
RED DOT = 0.5 ohms cold = amp at low power.
RED DOT = 6 ohms hot = amp at high power.
BLUE DOT = 1 ohms cold = amp at low power.
BLUE DOT = 12 ohms hot = amp at high power.
SEE PICS ... BOX FROM FACTORY SHOWS WE SUPPLY
GENUINE AND REAL OSRAM SYLVANIA.
We sell the genuine & correct Tannoy, JBL, EV, Electro Voice,
Convair, Bose, Peavey etc & many others lamp fuses.
These are built in the USA, by Osram Sylvania to the correct specification,
who also make lamps bulbs for the US Military,
these are not cheap China copies.
DO NOT FIT NON GENUINE FUSE / LAMPS.
NOT EVER EVER EVER.
No negative feedbacks please, we always resolve.
I had a few negative feedbacks, on low value items,
buyer never even made contact, thanks people,
hope someone does the same to you.
“Do to others, as you would expect to be done to you”.
I’m a good Ebayer, buy with confidence.
Will always try combine carriage / shipping costs.
All photographs are of the actual item I am selling, unless stated.
I do travel, so check if I am away and next ship date, people often miss.
Some items, cash or Bank Transfer, read listing.
I am not responsible for any import duties in your country.
Any problems must be raised within 5 days of delivery, NO EXCEPTIONS.
Valve equipment contains dangerous high voltages (over 300VDC),
please do not buy if you don’t how to use.
If you feel an item is not as described, or faulty, make contact.
We will try to find a solution acceptable to all.
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