What's wrong with the kiss, boy?

[Reima]

Silly me, I did not see the note on the parts list.

 

[pwayland]

Love it! Sounds open, detailed, Spacious! warm and just wonderful in front on the X150.5 and it hasn't even warmed up! Thank You many times ZenMod and Jim 6l6 for the boards and abundance of knowledge! Added a bunch of extra iron to a 16 gage steel case from a clapped out crest audio pro power amp. Plan to rework the signal wire management and possibly fab some covers for the edcores. They just seem too close to input signal wires...And I have nice 16 gage steel covers. Peace

 

[KevinHeem]

@pwayland
What transformers are you using?

Edit: Asking about PS transformers.

 

[KevinHeem]

I haven’t found this in the thread yet…but can I assume the PS/regulator can be populated and tested before completing the rest of the board?

 

[pwayland]

Antek AN-0218. 25va 18v secondaries. Be sure to order their nifty new covers, which were about an extra $10 each

 

[pwayland]

And re PS, sure why not? Look at schema. Just adjust voltage to 15vdc after everything is complete. I believe it's always good to work that way though...

 

[pwayland]

I believe It is possible Zen Mod has magical powers or at a minimum is truly a Savant! Sung or unsung, I, in this moment sing your praise! Bloody hell man this Iron Pre is so beautiful!

 

[KevinHeem]

“magical powers”….doubtful. Clearly gifted (maybe genius), but I believe it’s his passion combined with years of “seat time”, whether it be at the bench or in front of speakers, that sets him apart.

 

[pwayland]

Says he who isn't sure about a transformer...

 

[KevinHeem]

Exactly!

 

[Zen Mod]

........and possibly fab some covers for the edcores. They just seem too close to input signal wires.......

no need for that, Edcors doesn't care for your signal wires

just imagine Elephant and Fly

 

[Ben Mah]

The signal wires probably care about the power transformers and AC power wires though. At least the power transformers have covers.

One solution - rotate everything inside 90 degrees counterclockwise, locate the AC input and AC wires on the right side of the chassis, and locate the input and output jacks and wires and volume pot wires down the left side of the chassis.

 

[pwayland]

no need for that, Edcors doesn't care for your signal wires

just imagine Elephant and Fly

Ok, good to know! Would there be any issue with adding another pair of outputs to an active x-over ?

 

[Zen Mod]

what Ben said

regarding xover - if Rin of same is comparable with already connected power amp, why not

 

[pwayland]

A question regarding volume control. For my setu, Iron Pre is receiving balanced source from a PS Audio Perfect Wave MKII DAC which has what appears to be a WM8741 dac based volume control. I can't find the spec, but I suspect 12+db gain. I seem to have read that chip works best at greater than half volume. I'm thinking I could delete the pots on iron pre and increase R28, R30 by 5k or more so that I can control volume from the DAC (with a remote!). No?

 

[Zen Mod]

indulge me, point me to (your) ref. sch, so I can be sure what R28, R30 are

 

[pwayland]

Attach Input before R29 R30 and remove R27 ?

 

[Zen Mod]

you can't remove anything, you can't change anything - every resistor is having desperately necessary function

if you want to delete vol pot, your choice, but leave rest as is

 

[pwayland]

Understood. I've got some Ideas. I'll report back. Peace and as always my deepest respect and appreciation. PS this circuit wired to the X150.5 is well just wonderful...

 

[pwayland]

The signal wires probably care about the power transformers and AC power wires though. At least the power transformers have covers.

One solution - rotate everything inside 90 degrees counterclockwise, locate the AC input and AC wires on the right side of the chassis, and locate the input and output jacks and wires and volume pot wires down the left side of the chassis.

Yes Ben.I appreciate your observations. I am totally cognizant of the AC B fields.I studied physics as part of my science and engineering degrees..Maybe you noticed the welded square tube ac mains channel. Early days on this iteration.. I may attenuate volume from my DAC and do away with those long wires to front.