Tube rectifier B+ differences

[tubedood]

And yes I see now that there is much more to planning your B+ voltage than a simple multiplier.

I'm learning thanks to all of you!

[eschertron]

You're not the only one learning from all of this. Thank you for bringing the topic up!

[mozz]

Bringing this back, found the tube rectifier txt file i was looking for, of course while looking for something else. Credit goes to the website below
Five Volt Fullwave Rectifier Tubes - 10 Feb 2017
Mike@MDBVentures.com
http://www.MDBVentures.com - Great prices on great tubes!

Losing the text formatting while trying to paste so i am posting the file.

[tubedood]

Nice mozz the more resources we have the better!
Very much appreciated!

Dale

[SoulFetish]

I personally find graphical illustrations very helpful. It helps me quickly see voltage/current relationships (or others) and better understand operating conditions, particularly when it's nonlinear.
Here is a nice graphic showing tube rectifier resistance curves, which can be seen in a nice article on tube power supply design here:
http://diyaudioprojects.com/Technica...ower-Supplies/

[aaron]

This list can serve as a reference:

http://www.300guitars.com/articles/r...ge-drop-chart/

broken link............

[Jazz P Bass]

PS Tube Data cheat sheet.pdf

[aaron]

[ATTACH=CONFIG]58261[/ATTACH]

[ATTACH]58262[/ATTACH]

of course, I was looking for a EZ81

[Helmholtz]

I was looking for a EZ81

It's all in the tube charts. You need to specify load current and transformer DCRs.
https://datasheetspdf.com/pdf-file/1...Philips/EZ81/1

[aaron]

It's all in the tube charts. You need to specify load current and transformer DCRs.
https://datasheetspdf.com/pdf-file/1...Philips/EZ81/1

Thanks, Helmholtz, but I can't understand the datasheet.

If it helps, I'm talking about a guitar amp, PP, 2 ouput tubes el84.....

From the data sheet, is the voltage drop Vtr minus Vo?

[Helmholtz]

Look at the schematic on page 9. Vtr is the total AC (rms) no-load voltage of the HT winding. Vo is the output DCV (B+). The chart shows how Vo drops with increasing load current. The load current of a 2 x EL84 class AB amp with a B+ of 300V may be around 85mA at idle and 120mA at full power.

[Pedro Vecino]

I recently built a pair of Plexi-style Marshall with fixed bias. 3xECC83, 2xEL84 and 2x300VAC. I got approximately 390V with diodes and 360V with EZ81. It fits the graph.