EL84 driven 2a3

alexg · 29th June 2008, 02:59 PM

Inspired by the circuit described here, EL84 DC coupled to 2a3 , I am planning to build a similar circuit.

But instead of DC coupled EL84 into the 2a3, I am planning of using a Lundahl 1660S interstage (2:4.5) configured as SE-SE interstage.

I just built an EL84 driven EL84 and I was impressed with the results. I have a pair of 2a3 and an idle OPT (though with primary Z of 5K, but it should work), and I like to experiment with the circuit.

Any thoughts?

andyjevans · 29th June 2008, 09:48 PM

But instead of DC coupled EL84 into the 2a3, I am planning of using a Lundahl 1660S interstage (2:4.5) configured as SE-SE interstage.>>

I thought the 1660S was created as a phase splitter. Wouldn't it be better to use a LL1660 in 1:1?

miklos · 29th June 2008, 09:58 PM

Looks good and probably souds equally good.
I don't like the color, but I guess if you're Irish it's ok.

alexg · 30th June 2008, 12:27 AM

Quote:

Originally posted by andyjevans
But instead of DC coupled EL84 into the 2a3, I am planning of using a Lundahl 1660S interstage (2:4.5) configured as SE-SE interstage.>>

I thought the 1660S was created as a phase splitter. Wouldn't it be better to use a LL1660 in 1:1?

As far as I know, the 1660s is same as 1660 with a faraday shield.

I am thinking of using 1660s because I have them.

The 1660 and 1660S on Alt-T configuration for SE-SE is 2:4.5 only, I don't think that it can be configured for 1:1, but I will check on this. Thanks.

29th June 2008, 02:59 PM	#1
alexg diyAudio Member Join Date: Jan 2005 Location: Philippines	EL84 driven 2a3 Inspired by the circuit described here, EL84 DC coupled to 2a3 , I am planning to build a similar circuit. But instead of DC coupled EL84 into the 2a3, I am planning of using a Lundahl 1660S interstage (2:4.5) configured as SE-SE interstage. I just built an EL84 driven EL84 and I was impressed with the results. I have a pair of 2a3 and an idle OPT (though with primary Z of 5K, but it should work), and I like to experiment with the circuit. Any thoughts?

29th June 2008, 09:58 PM	#3
miklos diyAudio Member Join Date: Jul 2004 Location: toronto	Looks good and probably souds equally good. I don't like the color, but I guess if you're Irish it's ok. __________________ miklos

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29th June 2008, 09:48 PM	#2
andyjevans diyAudio Member Join Date: Sep 2003 Location: London	But instead of DC coupled EL84 into the 2a3, I am planning of using a Lundahl 1660S interstage (2:4.5) configured as SE-SE interstage.>> I thought the 1660S was created as a phase splitter. Wouldn't it be better to use a LL1660 in 1:1?