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In Reply to: RE: Goodbye Type 45 ....... hello JJ 2A3-40 posted by drlowmu on October 10, 2016 at 11:34:51
In a good amp the 45 sounds wonderful
much ,MUCH better than a JJ2a3 and i have also the 2a3 and 45 from EML solid and mesh
the JJ 2a3 is not the best sounding tube.
But you can only hear that is a well build amplifier
no paralel capacitors you waist your time with that believe me.
Follow Ups:
The JJ 2a3 is in fact the 300b tube but with 2,5 volt hrster
It has notting to fo with a 2a3
If you like that tube you also like a 300b
They have Exactly the same sound.
Better mids and highs.
Note, I was ONLY discussing ST and Globe 45s. These have a " V " or " W " shaped filaments.
All the EML DHTs have LINERLY spaced ( to the plate - and large ) filament structures, as does the JJ 2A3-40.
I have never done much with EML 45s, but I could " imagine " them, from their filament-plate design, to be superior sounding to the V and W older 45s.
I struggled in my living room with ST and Globe 45 amps for a year, NO MORE !!! As soon as I inserted a JJ 2A3-40, operating as a Type 45 ( 5 K output XFR and only 27 mA. Ia ) my VOTTs came to life and sounded linear in the midrange, on piano, etc.
Next, I will convert to a proper 2A3 circuit !! Man, my 515B woofers, in their top range ( crossed over at 800 hZ ) really " rocked" for the FIRST time in a year !! This VOTT system, as I am configuring it, will become a solution I have been looking for in audio, for a long time !!
Cheers,
Jeff
The JJ 2a3 is in fact the 300b tube but with 2,5 volt hrster
It has notting to fo with a 2a3
If you like that tube you also like a 300b
They have Exactly the same sound.
I agree. It's real close. If you don't have a WE 300B, then the ELROG 300B is the next best tube to my ears. Of course, the amp's circuit and in some cases (depending on the circuit) the driver and rectifier can also influence the sound, if you hold everything else constant.
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