Weber Bias Rite question

[GloryHog]

So, I just ordered up a Bias rite dual octal. This may be a stupid question, but will I still need to remove the corresponding tube fuses, as when biased the usual way? (Sorry, I'm a total noob when it comes to this biasing stuff)
It's for Einstein 100, btw.

Brian

 

[duesentrieb]

No. Keep them in their normal position. You are measuring the cathode with the BR, the fuses are on the plates (anode).

 

[oeatschie]

So, I just ordered up a Bias rite dual octal. This may be a stupid question, but will I still need to remove the corresponding tube fuses, as when biased the usual way? (Sorry, I'm a total noob when it comes to this biasing stuff)
It's for Einstein 100, btw.

Brian

Hi Brian,

if you're using a bias rite to bias the tubes you should not remove the fuses as the bias rite is between the tube socket and the tube itself. Please be aware that you have to calculate the transition resistance (socket -> bias rite -> tube with bias rite, socket -> tube without bias rite) to get the designated current after setting it up.

P.S. (no offense, just curiosity Why do you buy something when you don't know how to operate it? There's high voltage sections in such amps (even if turned off for a short time) which could really harm you if you're not cautious and know what you're doing.

P.S.P.S. Just joking with the transition resistance

 

[GloryHog]

Thanks for the quick answers, guys. As to the last question, I researched the product and am just preparing myself to do it right the first time, thanks. I had a hard time getting readings on the digi-multimeter I had access to, so why not get a tool made exactly for the job. I didn't think I would have to remove the fuses, but why not ask to be sure. I'm not a frick'n electrician.

 

[guitarobert]

P.S. (no offense, just curiosity Why do you buy something when you don't know how to operate it? There's high voltage sections in such amps (even if turned off for a short time) which could really harm you if you're not cautious and know what you're doing.

Sorry for jumping in, but I've bought many things without first knowing how to operate them. How else can you learn?

Using a bias rite is much safer than measuring at the output transformer. Having received a nasty shock in the past when one of my probes slipped, I can attest to it myself! With the bias rite it is simple and safe.

 

[guitarman967]

P.S. (no offense, just curiosity Why do you buy something when you don't know how to operate it? There's high voltage sections in such amps (even if turned off for a short time) which could really harm you if you're not cautious and know what you're doing.

Sorry for jumping in, but I've bought many things without first knowing how to operate them. How else can you learn?

Using a bias rite is much safer than measuring at the output transformer. Having received a nasty shock in the past when one of my probes slipped, I can attest to it myself! With the bias rite it is simple and safe.

Agreed, that was a fairly ignorant post.. Not to mention the Bias rite takes danger of measuring high voltage right out of the equation. You just have to be careful not to stick your hands under the amp when transporting it and you're fine.

 

[oeatschie]

Agreed, that was a fairly ignorant post.. Not to mention the Bias rite takes danger of measuring high voltage right out of the equation. You just have to be careful not to stick your hands under the amp when transporting it and you're fine.

Would be a nice turn if you agree that my post was only partly ignorant. Preceding my ignorant question I provided an answer as well

P.S. The Einstein has external bias points where you can plug in your multimeter and trim the bias, so the danger of getting hit by any loose cables usually should not be a problem. So I agree that it's a matter of preferences what to use, but it's still a problem when in the "thrilling" process somebody forgets to turn off the amp, regardless if he's using bias rite or any other instrument. And that's where my ignorant question comes from.

P.S.P.S. somebody = me (luckily not to often)