8 Channel, 3U NEVE 1073 completed

No problem. ???

Sry...i kinda feel bad, in this case....cause i re-read your previous messages...and it does sound like you are helping yourself. There's been so many people tho....that just expect everything handed easily to them. I read hundreds of pages of thread info when i started my first build like, 5 years ago. No easy way out.

Quick search on the forum yields: http://www.groupdiy.com/index.php?topic=35422.0

That blue seems pretty decent, although it's only a two channel unit. Dan could definately do something custom.

Hi,

did some searching, but i have not found exactly what im looking for.

I am building 4 ez1290's, and am adding phantom, phase, and pad.  I have the inputs from the XLR wired to my phase and phantom switches.  But im not sure what the simple schematic for the PAD would look like, before i head off to input transformer land.

I am basically just building the JLM go between i guess.. i had the parts lying around, so i figured i would give it a shot.  Does anyone have a drawing of a typical 15-20db pad that will work here?


Thanks,

mike

Hey Mike. Quick search yields: http://www.groupdiy.com/index.php?topic=2370.0

Thanks! i'll try to make sense of that and fit one onto my front panel.

Mike

Hey guys!

I'd like to wire an impedance switch for my pre's. I've read through all of the EZ1290 threads a few times, and took some notes. Here is what I understand:

One can install a DPDT switch that will switch between 300 (Parellel) and 1200 (Series). You get the 1200 impedance by tying the + of one primary to the - of the other and using the other + and - as the primary connections. In parallel you tie your +'s together and your -'s together and are left with the equivalent of one winding, 300.

Here are my questions:

1. Is the impedance switch wired from the input tranformer?
2. Would anyone be able to help me understand the process for wiring the impedance selector switch? Basically, I would like to understand which leg of the DPDT switch gets wired to the corresponding numbered input tranny post.

I'd really appreciate the help!

the impedance switch is basically explained in this pic:

useme2305 said:

the impedance switch is basically explained in this pic:

Click to expand...

Yep, I have that pic already, but I'm wanting to make sure I get it right. Basically looking for a impedance selector schematic for dummies.

I made up this pic, and would really appreciate if someone could simplify the wiring process, and tell me what numbers from the input tranny I need to connect to what numbers from the switch. I'd be happy to post the completed wiring diagram and post for others to reference.

That's great! Thank you!

Two more questions:

1. Do I still need to jumper between 8 and 9 on the input tranny, as per the assembly guide?
2. When using this with the Go Between, would I run the XLR wires into the Go Between first, and from there the impedance switch, or vice versa?

Again, really appreciate the help!

1. yes
2. XLR>Go Between>Tranny/Switch

Thank you, good sir!

I know this is a lame question, but what is the purpose of putting heat shrink at the ends of all the wires?

2 second search on google.

http://en.wikipedia.org/wiki/Heat-shrink_tubing

I see, so basically to protect against abrasions.

One more question, perhaps more important. I've finished wiring and stuffing all the boards, transformers, etc., but I have 10 OHM, 1W resistors from the BOM left over. What are these for? What did I miss?

use it to connect the audio ground to the chassis ground with 10ohms resistance between em.

...and if you used the JLM power supply you don't need it, cause it's built in.

Ah, that's it. I used the JLM Power Plant kit, so I guess I don't need it then. Thanks!

JLM powerplant is designed to run Neve's, so i'm assuming it has it. I know the acdc, powerstation have it.
Might want to ask to be sure...or simply have a look on the board.

Yep, sure enough there's a 10R on the Power Plant. Thanks again!