diyAudio (
-   Tubes / Valves (
-   -   PSU dimensioning for pre-amp (

rblilja 17th February 2013 01:23 PM

PSU dimensioning for pre-amp
I have decided to give the 12AU7 based pre-amp described at the following (excellent) page a try:

DIY 12AU7 Tube preamp

However, regarding the B+ supply, what current drawn should I expect. My naive calculation would be to sum all load point currents up (2*6 + 2*11 = 34mA), and add a margin (say 20%). Would that do it? How would a more correct calculation be done?

(I'm planning to use a MOSFET based power supply and a homemade transformer taking 230VAC, outputting 230VAC + 6.3VAC. Since I like slimmed designs I don't want to use an overkill sized transformer, thus my question.)

Best regards, Robin Lilja

DF96 17th February 2013 01:44 PM

Your calculation seems OK.

rblilja 22nd February 2013 09:46 PM

OK, thanks! :)

All times are GMT. The time now is 11:03 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 18.75%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio