8 Channel, 3U NEVE 1073 completed

[muffy1975]

hi team,

using the recommended carnhill iron, is there a diy method for changing the stock impedance of the input xformer from 1200 ohms to 300ohms, so that i can use say a ribbon mic?

can someone point me i the right direction of this has already been covered?

regards and thanks in advance of any help

michael de a

 

[sam system-d]

Yes you can
I was actually thinking about something like this.

 

[mrcase]

Hey all! do you know if martin is still offering these boards for sale? I dropped him an email but didn`t get a response...
cant wait to build those babys

 

[sam system-d]

bought mine a mounth ago, so yes, he's still on the market. be patient, you'll get an answer.

 

[mrcase]

good news! thanks!

 

[sr1200]

Anyone thats built a 4ch version with the JLM powerstation, any suggestion for power Xformer? Im adding 4 JLM go betweens (which shouldnt really effect the draw i assume)

 

[MicDaddy]

I'm using this one for the JLM Powerstation and 8 EZ1290s with the JLM gobetweens

Avel Lindberg Y236351

Avel Lindberg Sales

800-979-1022, x 1, or fax 860-354-8597

 

[sr1200]

Thanks ;D

I opted for the 6amp rectifier (i figured might as well get the most out of it) was this correct to do?

 

[MicDaddy]

Thanks ;D

I opted for the 6amp rectifier (i figured might as well get the most out of it) was this correct to do?

I did the same thing by recommendation from Joe and desol.

Don't do like me and forget the tripler jumper    caused no harm but wasn't quite working right.

 

[wimmy7986]

Hey Everyone!  I've got something weird happening....  On my ACDC power supply, I accidentally got the 337 and 317 backwards.  So i removed them, ordered new ones from mouser.com, put them in, powered up, and then my 47r 1W resistor on the PSU burned.  I figured that the regulators were probably shorting to the case, so i took the PSU out of the case, replaced the resistor, fired it up again, and then the same resistor burned up.  I triple checked for shorts and can't find any.  I should note that while I was waiting for the regulators to come in the mail, I used the one I had left and had my 24V rail working perfectly...  Anyone got any ideas??  Thanks!

 

[Davo]

how are you hooking up the psu to your boards?...... this is a +24v project, you shouldn't need a 337

 

[wimmy7986]

Thanks for the quick reply!!  I have followed the assembly instructions exactly as indicated on the first page.  For the 337, i threw it back on the board just because it came with the original ACDC package.  I know its for a negative rail, which is unused in this build.

 

[Davo]

Good, glad you're not feeding -24v anywhere.  As long as you're getting a steady 24v, that reg is good, so no need to replace. 
Take a look back at page 32 of this thread where something similar is discussed. 

If that doesn't help, you'll need to go through your build with a fine tooth comb, checking every single resistor value etc.

cheers

 

[wimmy7986]

Thanks Davo!  I've read and searched all throughout this forum for this specific issue, and the common issue is with shorting to the case.  Even after I pulled the board out of the case and put a new resistor in there, it still burned up when i fired it up.  Could i have maybe gotten the incorrect LM317?  The one i ordered was a positive, adjustable, standard regulator that is adjustable up to 57V.  Also, the 47r resistor i replaced the first burnt one with was significantly smaller than the one included in the ACDC package, but was still a 47r 1W. 

 

[wimmy7986]

I should also point out that when I originally had the 317 and 337 mixed up, nothing was burning or smoking, I just had the wrong voltages...

 

[Davo]

Evilcat wrote this a few pages back: (pg 39)

If I remember correctly, the 47R 1W is a protection resistor for the phantom cicuit. Mine burned too when I accidently did a shortcut between +48V and another rail or ground, I don't remember...
Anyway, check your solderings, shortcuts in the phantom area. Hope it'll help. Good luck.

You got the right LM317, and those resistors come in a bunch of sizes, so I wouldn't worry too much about that.  If you're using a 24v xformer, make sure that your phantom jumper is set as
a doubler rather than a tripler.  In the past when I've mixed up regs, they're usually blown, so you may want to replace the phantom reg (??? the other may be fine, but I don't know)

cheers

 

[wimmy7986]

FIgured it out!!!!  The 5k TrimPot on the 48V rail was toasted and not working.  When all else fails, rely on the multimeter   I stole the 5k pot from the negative rail, fired it up, and all is well!

 

[Davo]

Excellent, I knew you'd find it pretty easily

cheers

 

[wimmy7986]

I've got an odd and slightly, well, really embarrassing question...  Has anybody had any experience removing the stop pins from the switches?  I accidentally put the pin in the wrong spot, and now i can't remove it.  Any help would be much appreciated   Thanks!

 

[MicDaddy]

I've got an odd and slightly, well, really embarrassing question...  Has anybody had any experience removing the stop pins from the switches?  I accidentally put the pin in the wrong spot, and now i can't remove it.  Any help would be much appreciated   Thanks!

Try a magnet, or some blue poster sticky?