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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: KT90 was NOT based on the EL519 posted by Vanimal Manley on November 8, 2002 at 10:31:34:
I beg to differ.The tooling used by EI for anode as well as for the mica discs is the one used for their 1980ies EL519s - the grid configuration is different, but the anode looks like a carbon copy.
I challenge you to do the comparison.
The EL156 is somewhat different - it is based on the LS50-family,
and a real pentode. These two and the EL152 share the basic configuration, but differ in the envelope, connection layout and internal capacitances, as the latter was optimised for VHF use.
The EL153 is similar, too, but a tetrode with beam former...This is easy to see - just take one of each and look at it.
Mr. Manley may have intended to get a EL156, alas, this did not deliver. The KT90 is a reasonably good beam power valve, but it is nowhere near the EL156 in properties.
Compare the curves.
If you are in for a _good_ EL156-clone, they are produced in China now.
If you are in for an interesting beam power valve, take the KT90.
Regards,
---mb---
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- Korrigendum - or 'Tooling' ... - mb 12:41:00 11/11/02 (0)
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