Mouser transformers for Deacy amp

[mac]

Now that I'm in Boca Raton, FL for some weeks I want to buy some parts like audio transformers for a Deacy-like amp, etc.
I've been reading post about Deacy.

Brett suggests cheap Mouser made by Xycon,

driver
http://www.mouser.com/ProductDetail/Xicon/42TM024-RC/?qs=sGAEpiMZZMv0IfuNuy2LUU2nVj3GMLUa5BMufc3Gv80%3d

output
http://www.mouser.com/ProductDetail/Xicon/42TU048-RC/?qs=sGAEpiMZZMv0IfuNuy2LUQ0m87amfyq2SN5wUXXaFbk%3d

Others go for Eagle LT44 and LT700.

Looking the Mullard schematic the driver and output T have less DC resistance than the ones from Mouser. I guess some current adjustment must be made... or not? (like cathod biasing)
How to estimate the current through the driver T?
If I use a 10v supply and the data say primary impedance 10kohm, then 1ma of current is optimal?
Same for the secondaries, and output T

mac

[PRR]

> cheap Mouser made by Xycon

The originals were "cheap", and these products appear to have not-changed in four decades. At least on the US market, which was often sourced from Japan. In the UK/Euro market there may have been other suppliers.

> driver 42TM024-RC
> output 42TU048-RC

Seems likely. However I do NOT have the original plan for reference.

> Mullard schematic the driver and output T have less DC resistance

DC resistance is a very minor issue. Will NOT affect bias. Could shave power, not enough to notice.

BUT: since the parts basically have not changed, I wonder if the Deacy used different impedances?

The 42TU048 is nominal 48 ohms CT and 460mW. My old GE graphs suggest this needs a 4.5V battery. You could sure push it to 6V battery and 800mW: the bass will be more distorted but that may be the "mojo". Aside from bent-signal, no harm is done.

Is that like the specified battery in Deacy?

> How to estimate the current through the driver T?

Deacy should set-up fine.

Supply voltage divided by driver primary impedance. Taking round-number 5V: 5V/10K= 0.5mA, though 1mA would be a reasonable excess. How you get the 0.5mA-1mA is up to base and emitter circuit.

> If I use a 10v supply

10V supply on 48 ohm output impedance is over 2 Watts out. The 42TU048 is rated 0.460W from 300Hz up. Assuming you do feed 10V and drive to 2+Watts out, everything below 670Hz will be grossly distorted. This may be how it is supposed to be.