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Lundahl LL1663 PP
Lundahl LL1663 PP
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Old 9th September 2019, 06:58 PM   #11
6A3sUMMER is offline 6A3sUMMER  United States
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Join Date: Jun 2016

Thanks for reminding me of Rack (height) Units, or maybe not.
With many jobs, the US Navy, Feds, and a major T&M company,
I had to work with 19 Inch Racks. Arrrgggg!

But I like your creativity to get tubes doing 35WPC into 2 RU!

Last edited by 6A3sUMMER; 9th September 2019 at 07:02 PM.
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Old 11th September 2019, 07:19 AM   #12
K.A.B is offline K.A.B  Sweden
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Thank for the answers I have received I may continue to look but i have heard that EL86 may be a candidate but may research more. Of course I will try them on my upcoming EL34 build.

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Old 11th September 2019, 09:21 AM   #13
45 is offline 45  Italy
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Yes, it's quite good. Basically same as EL84 with lower anode voltage. You get 18W with just 250V voltage supply (i.e. about 235V anode voltage + 15.5V self bias). Compact and economical.
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Old 11th September 2019, 05:48 PM   #14
hpeter is offline hpeter  Slovakia
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Location: Electrostats or bust
maybe time to try schade feedbacked pentodes...
should be better than UL
..BLOG.. XMOS_U8/PCM5102A > LL1544A > 6H9C+gyrator > 2A3_SOV/JJ > LL1660 > STAX SR207 _ SR L300 _ SR007 # LL2748 > 394A > LC 12H/1000 // 4-125a test
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