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Original Message
Favorite G2 iron parts as of 1-7-06
Posted by drlowmu on January 7, 2006 at 14:01:14:
Ray,
Here is what I like to use now, iron-wise, with some minimum alternatives, done from memory so I could be off a digit or two :
Power Transformer....... " The Source "
Signal Transformer Corp's DU1/2, 500 VA, 2.3 ohms DCR, the best.Its got the STUFF man ......... provides " true old-time authority, musical freedom, and magic" to the audio's presentation!!
Signal Transformer Corp's A41-175-230, 175 VA, 7.44 ohms DCR, ( .76 A. ).No slouch, but sonically not in the same league as the DU 1/2, the MINIMUM one should use on G2. Easy to "fit in" versus a DU-1/2, but..... SO what, I 'wanna HEAR the amp at the best, so just 'gimme that DU 1/2 please.
L1
Signal Transformer Corp's CL-6-12, only .16 ohms DCR !!! at a 12 MILLI Henry rated inductance. This thing is dynamically cool to HEAR. Obviously Jeff ain't concerned ONE IOTA with "reaching critical inductance", NOR is there any concern over the much-trusted "P-Dud" computer program....this inductor just sounds good to ME and thats ALL I need to know and have.
Triad CX-40 (?) from the Allied Catalog, .32 Hy at 10 ohms DCR at .6 A. current capability, not too expensive, eleven dollars or so. But really Ray, the preferred Signal CL-6-12 .16 ohm inductor for the L1 spot just kills the Triad to my ears.
L2
Lundahl's 10 HY choke, I forgot the number, maybe LL-1338 /10 HY. But it consists of two 5 Hy / 18.1 ohm DCR windings on a common core, which I parallel to obtain 9.05 ohms DCR at 2.5 HY, for some HY. filtering with L2 !!I don't know of any alternative to this choke for G2's L2, at this time. Its about $80 from Kevin at K&K.
Now you "know" Ray, and maybe this is too much to do, but I LIKE what it does, a whole lot.
Using Pentodes?... with all else optimized, its *** ALL *** in the G2 supply implementation !!
Jeff Medwin