Looks good, although the Hammond 126C is not available in NL (Farnell does not stock it) and then it becomes very expensive: more than USD 300. . . .
Indeed the chinese one I linked to does not have "bifilar wound windings for exceptional coupling and bandwidth". A donkey or a mule? Better as anode choke load (two windings in series) - then that is of no concern.
Indeed the chinese one I linked to does not have "bifilar wound windings for exceptional coupling and bandwidth". A donkey or a mule? Better as anode choke load (two windings in series) - then that is of no concern.
i'm in France and i buy the 126B pas C, 126B
from BTBeleKtroniK Germany,
BTB Online Shop
wath donkey and mule???? Diamond its not for animals I built many amplifier with 126 serie IT Bifiliar winding its the must perfect interstage transformer if correctly used Primary/secondary should be in phase No more of 300VDC between primary secondary 126B its perfect if you use correctly 30mA 300V primary maximum and secondary to 300B grid and ground With appropriate parallel resistor For perfect linearity You can use 126C with 45 triode for 15mA 300V In this configuration 126 IT its better of any interleave winding IT For fixed bias 300B you should buy Sowter 9525 Look @ Sowter for bifiliar features Sowter type 9525
from BTBeleKtroniK Germany,
BTB Online Shop
wath donkey and mule???? Diamond its not for animals I built many amplifier with 126 serie IT Bifiliar winding its the must perfect interstage transformer if correctly used Primary/secondary should be in phase No more of 300VDC between primary secondary 126B its perfect if you use correctly 30mA 300V primary maximum and secondary to 300B grid and ground With appropriate parallel resistor For perfect linearity You can use 126C with 45 triode for 15mA 300V In this configuration 126 IT its better of any interleave winding IT For fixed bias 300B you should buy Sowter 9525 Look @ Sowter for bifiliar features Sowter type 9525
He spoke of the Chinese unit 😉 As Numero Quaranta Cinque already mentioned, an 1:1 interstage can be fine for driving in to grid current. Mine were not cheap (circa €200,- excl) but they seem to hold fine at 450VDC and 130Vrms swing. Amorphous C-core, BW >48KHz. I'm not familar with the exact self-inductance value, but it was a little short for #27. You could inquire for units-to-spec but lead times are not great... as is with Sowter. Sound quality is impeccable I can attest.
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The Hammond 126 is a honest transformer but it is not cheap. So I prefer to spend a bit more and get the best. Personal choice of course.
I did try the 6C4C as a driver for PSE 4P!L outputs. It had a clean, solid beefy sound but lacked the finesse of something like a 10Y or 46. I used Rod Coleman regs, which were fine. I now have 46 into 300b which is very nice. For added gain I use a NE5534 op-amp stage in front (gain x5.5) which I like - transparent and no coupling cap needed. I could imagine 6C4C into 300b working this way and sounding quite nice. Cheap way to use it would be with a Hammond 157G plate choke as in the Hagerman Tuba headphone amp. Also works quite well.
Tuba - Vacuum Tube Headphone Amplifier – Hagerman Audio Labs
Tuba - Vacuum Tube Headphone Amplifier – Hagerman Audio Labs