Description:
Classic long plate European design with special grid plated by gold to reduce microphonic interaction and noise. The JJ ECC803s is a hi-gain 12AX7 that has a spiral wound filament to reduce noise and hum. The construction is different from the JJ ECC83s in that the plates are more conventional, but have a special heat dissipating fin that serves to improve efficiency and gain. If you want that great JJ tone in a hi-gain package, then these are for you. For hi-gain amps, stick with the JJ ECC83S.
Comments:
Bad. Very quiet but just didn't seem to work very well. Almost everything had a metallic "ring" to it and it may have been marginally damped or marginally stable, or maybe it was microphonic (although a "tap test" didn't show that). Gain was noticeably lower than others. Might require circuit changes to work best but it didn't work in a Super PAS.
Rz
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