Usually the -I suffix means the tube was designed for Pulse applications.
JACMUSIC seems to like em.
JACMUSIC seems to like em.
-I version has lower heater current (700 vs 800 mA), lower gm (24 vs 30 mA/V) and higher rp (14 vs 8 kOhm) in tetrode mode
JACMUSIC wrote:
"To get the cathode heat out, they used a very
wide anode distance, and then in works."
I think, the big anode-cathode distance is really the anode-screen distance primarily, because there isn't G3 (or its aequvalent reflector of beam tetrodes). The bigger distance provides enough space charge against secondary emission. This is similar at the QQE 03/12, but there is a little shiney metal reflector for better electron-focus.
"To get the cathode heat out, they used a very
wide anode distance, and then in works."
I think, the big anode-cathode distance is really the anode-screen distance primarily, because there isn't G3 (or its aequvalent reflector of beam tetrodes). The bigger distance provides enough space charge against secondary emission. This is similar at the QQE 03/12, but there is a little shiney metal reflector for better electron-focus.
Essentially, its a variant that is capable of higher instantenous voltage
But worse in every metric
But worse in every metric
... should read "higher instantaneous current" - not voltage ...
https://retrostore.eu/files/eshop/download/6e5p-i_data.pdf
vs
https://retrostore.eu/files/eshop/download/6e5p_data.pdf
https://retrostore.eu/files/eshop/download/6e5p-i_data.pdf
vs
https://retrostore.eu/files/eshop/download/6e5p_data.pdf
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I should checked the datasheet, since other pulse tubes i know have higher voltage ceilings at the expense of everything
