Tube rectifier formula

[Yosser]

On this website:

https://www.valvewizard.co.uk/bridge.html

What does the symbol ^ mean in the rectifier formula?

[Rontone]

A Caret '^' in this case is used for an exponent, with a 2 it would be squared

In Merlin's books this equation and others appear with the raised smaller numbers for any squaring, cubing or "to the power of"

It may be that the text formatting on the website has no option for the smaller raised numbers so the keyboard symbol ^ is used instead...


Alternatively it can be used for cat ears when leaving a comment online ₍^. .^₎⟆

[Yosser]

"The data sheet will present table or graphs showing the minimum limiting resistance needed for a given application. If the transformer alone doesn't have enough resistance to meet this requirement then you need to make up the deficit by adding resistors in series with each anode. These resistors need to have a power rating that comfortably exceeds:

P = (1.1 × Idc)^2 × R"

"For the GZ34 this is 250mA for a capacitor-input rectifier"

Is Idc 0.25 for a GZ34?

[sluckey]

P = (1.1 × Idc)^2 × R can also be written as P = (1.1 × Idc)² × R if your forum supports superscript formatting. Many forums do not provide superscript formatting. available.

250mA is same as .25A.

[Yosser]

P = (1.1 × Idc)^2 × R can also be written as P = (1.1 × Idc)² × R if your forum supports superscript formatting. Many forums do not provide superscript formatting. available.

250mA is same as .25A.

But is 250ma (0.25A) the value I should be inputting in order to achieve the correct operational resistor wattage for the anode resistors for a gz34?

[Rontone]

Is this in relation to your post on GZ34 backup diodes? : https://el34world.com/Forum/index.php?topic=33465.0

If so what resistors are you using, you mention 47R and 22R

Do you have a schematic of the amp?

If you input those then P = (1.1 x 0.250)^2 x 47

[Yosser]

Thanks to all who replied, that has been a great help.

[Merlin]

Idc is the maximum average DC current you expect your circuit to consume.