Comments on: Simple EL84 integrated/poweramp https://diyparadise.com/w/simple-el84-integratedpoweramp/ ... where we have more fun! ... Sat, 08 Feb 2014 15:26:35 +0000 hourly 1 https://wordpress.org/?v=6.0.9 By: yeo https://diyparadise.com/w/simple-el84-integratedpoweramp/#comment-362 Sat, 08 Feb 2014 15:26:35 +0000 http://127.0.0.1/wordpress63/?p=101#comment-362 hi john

thanks for the kind words.

why 400ma? as you said, 200ma is sufficient but the sound is always better when using a bigger power transformer.

i believe this is because we based our 200ma rating on continuous current. music, however, could consists of sudden surge in current. so 200ma may not be sufficient to cater for such peak demands. hence twice the dc rating sounds better to my ears.

thx!

yeo

]]> By: John https://diyparadise.com/w/simple-el84-integratedpoweramp/#comment-361 Fri, 07 Feb 2014 18:34:19 +0000 http://127.0.0.1/wordpress63/?p=101#comment-361 Hello Yeo

I like your design. Why are you using a 400ma power transformer ? It seems like a power transformer rated at 200ma should be more than sufficient for a stereo amplifier. Am I missing something? Thanks.

John

]]> By: Ultra Compact Club https://diyparadise.com/w/simple-el84-integratedpoweramp/#comment-329 Fri, 29 Mar 2013 06:00:57 +0000 http://127.0.0.1/wordpress63/?p=101#comment-329 […] admit, I’m guilty of "corrupting" the fine folks here with my Simple EL84 articles but I assure you I’m not the only Evil one […]

]]> By: yeo https://diyparadise.com/w/simple-el84-integratedpoweramp/#comment-73 Thu, 04 Oct 2012 04:12:12 +0000 http://127.0.0.1/wordpress63/?p=101#comment-73 hi needle

i won’t bother with ecc83.

if you want to use the 12a*7 series, use 12au7 or 12at7.

i’m afraid you’ll have to experiment with plate load resistors.

yeo

]]> By: Needle https://diyparadise.com/w/simple-el84-integratedpoweramp/#comment-72 Mon, 01 Oct 2012 20:58:24 +0000 http://127.0.0.1/wordpress63/?p=101#comment-72 Hi, ive read your complete article, and want to build this schematic but i do not have ecc99…. I do have some ecc83, what resisters do i need to change to make it work with ecc83/12ax7?

]]> By: yeo https://diyparadise.com/w/simple-el84-integratedpoweramp/#comment-71 Mon, 07 Mar 2011 10:24:06 +0000 http://127.0.0.1/wordpress63/?p=101#comment-71 hi david

i wrote the article above, as well as almost all the articles on this site.

you don’t need different optx, just optx with different tappings.

yeo

]]> By: David McGregor https://diyparadise.com/w/simple-el84-integratedpoweramp/#comment-70 Mon, 07 Mar 2011 09:50:37 +0000 http://127.0.0.1/wordpress63/?p=101#comment-70 Who is the author?

I like the idea of the switch to change mode of operation, but the valves would surely need a different OT for each.

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