What's wrong with the kiss, boy?

[qwertyl]

blame Eagle part package if inherent diode is ooked up

I don't care (or remember orientation) for inherent diode or even an arrow - I'm always looking that gate pin is closer to source pin on symbol

🙂

I am blaming KiCAD as it shows gate pin in the middle 🙂

 

[Zen Mod]

see?

what's few wrong arrows and diodes, between friends......

 

[qwertyl]

Regarding BC546 and BC556 transistors - should they be A, B or C? Or doesn't matter?

 

[Zen Mod]

doesn't matter

my OCD is functional just for LEDs

🙂

 

[Abx74]

Is it good to have a separe power supply for the IronPre (meaning Transformer, rectifier in a separate box ) to feed it directly with DC ?


Damien

 

[Zen Mod]

no need

look at pictures of completed builds

 

[Russellc]

No need at all. This pre is totally quiet.

Russellc

 

[Zen Mod]

especially in Mute

 

[Russellc]

At least after 24 hour ground wire was installed!

Russellc

 

[Zen Mod]

just keep reminding me, I already forgot about that

 

[Abx74]

Could somebody give me the Mouser or Digikey part number for the 14 pins Header and its cable please

 

[Zen Mod]

https://eu.mouser.com/ProductDetail...J60kZOWfhwutcGI4RkeJ/HcI5aU2Y4f%2BLKor%2BGw==

LINK

cable ........

wait for IAIMH to chime in

I forgot did I made orientation of pcb headers adequate for standard cables orientation - it's so easy to make those cables with small vice , so I'm never taking in account what's standard .......

in any case - buy plasticky and buy cable and make your own , by length you need

https://eu.mouser.com/ProductDetail...=/ha2pyFadugyvzd3GOId2kV0WluBvMS/enUYspe7jbs=

LINK

cable is 14 conductors (or 16 or 25 - strip redundant ) , pitch 2.54mm

note: even if you buy standard cable with ends, and if Mighty ZM didn't follow standard orientation , cure is simple - shaving a tooth on one connector, so you can rotate it for 180

 

[ItsAllInMyHead]

The 14 pin male and female that ZM linked should work. I got mine off of Amazon along with the tool. The tool may not be strictly necessary, but it was nice to have.

There are also a number of places (hopefully one near you) that sell cables pre-made.

Example -

Amazon.com: Sydien 2.54mm Pitch 2 Row 14 Pins F/F IDC Connector Flat Ribbon Cable, 30cm Length,5Pcs: Home Audio & Theater

 

[pfarrell]

More options—you can also make your own cables with the following parts and whatever color weeney wire you want:

https://www.mouser.com/ProductDetail/Molex/16-02-0104?qs=UAyrm/nZ%2BChKxEH6%2BQ7nkw==

https://www.mouser.com/ProductDetai...ha2pyFadugQXtaFqb17%2BkikTlBMNC7nYPhffcHQTn8=

Kinda my preference personally—you can also get a 2 row version of the header.

Another socket:
70246-1401 Molex | Mouser

 

[ItsAllInMyHead]

I really like that option also. Just don't be like me and short the pos and negative rail together when testing the relays using the individual wires. This (I think) only applies to the BAL version, but it's still a cautionary tale just in case. That was a costly error in terms of time and frustration.

 

[Zen Mod]

well, for me - it's cumbersome implementing fuse in every pcb trace

 

[ItsAllInMyHead]

Well played, sir.

 

[Dennis Hui]

The other day I noticed that when my IronPre is powered off, all
the left inputs are connected together, and the same thing with the right inputs.

I'm using the 2018 Single ended boards. I'm wondering if I might have wired
something incorrectly.

Thanks,
Dennis

 

[6L6]

Did you use normally closed relays?

 

[Dennis Hui]

I'm not sure. They were gifted to me by a very nice person. I'll check this
weekend.