Output transformer question

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Ukko75
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Output transformer question

Post by Ukko75 » Thu Apr 23, 2015 4:11 am

Hi!
I have output transformer that has 6,6k primary impedance and i´am planning to puild JTM 45 amp. The question is should i use KT66 or EL34 tubes with this transformer?

ivan H
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Re: Output transformer question

Post by ivan H » Thu Apr 23, 2015 9:21 pm

Hi, u should use the KT66 ideally, tho people do use EL34's. If u plan on using EL34's u could mismatch the speaker load to the impedance selector, ie; use an 8 ohm speaker load with the selector set to 16 ohms, this way the EL34's would see a plate to plate load impedance of 3k3. Hope this helps. Cheers

Ukko75
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Joined: Sat Nov 26, 2011 3:43 am
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Re: Output transformer question

Post by Ukko75 » Fri Apr 24, 2015 12:08 am

Thanks for the information!
I will order pair of KT66:s.

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