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 on: Today at 02:02:43 PM 
Started by arch801 - Last post by klaus
The first question I have: what brand is the "European" power supply?
Because all Neumann supplies I am aware of have multi-taps for the line voltage.
And if it's a budget supply, don't even bother going down that road, because every U67 deserves a well-filtered, well-stabilized high-end supply*

The second issue of concern:
Using a step-up transformer may get you in the neighborhood of 210VDC/6.3VDC, but more than likely the voltages you will find will be off enough that it matters-
for tube life, capsule life, noise floor, distortion.

To correctly dial in the precise voltages, you will need a decent meter and soldering skills,
as high and low voltages are set with dropping resistors that need to be changed (not an issue with the heater voltage on NU67u, which have a trip pot).

* the new NU67V are terrific: they automatically seek the correct voltages, even after a tube change. No more voltage adjustments for life!

 on: Today at 10:13:28 AM 
Started by arch801 - Last post by arch801
Thank you so much for the reply! That is very informative, and a bit of a relief to know that having a bit of variation won't be a huge problem.

You are a legend sir, your informative posts over the year have really helped me down the path towards professional microphone ownership, and it is very much appreciated! =)

 on: Today at 05:46:08 AM 
Started by arch801 - Last post by Kai
These PSU‘s don‘t need much power, and some voltage variation is allowed.
A normal ca. 100 W step up 110 to 230 (220) V step up transformer is more than sufficient for the job.

If you want to make sure, get an inexpensive voltmeter and measure the step up transformer’s output voltage, e.g. something like this:

VC185-VC185TRMS-DIGITAL-MULTIMETER (URL removed, as only available in Germany. KH)

To do so and avoid any danger:

• Plug a power strip into the output of the unpowered step up transformer.
• Then connect the voltmeter and the switched off PSU to it.
• Use the meters 400 V AC range.
• Power up the step up transformer.
• Voltage should be 210 - 260 V.
• Switch on the PSU.
• Voltage should be 200 - 240 V.

 on: Yesterday at 03:57:49 PM 
Started by arch801 - Last post by arch801
To elaborate, if it's just a matter of getting a robust power transformer that's fine with me,
I just need to know if there are any other concerns I should be aware of, and any suggestions
as far as what kind of power converter to get would be very welcome!

And if converting the power from EU to US would be a bit shaky in general,
I would have no problem selling this EU power supply and buying a US one if that is the best option.

Please let me know your thoughts if you can spare the time. Thanks for any help!

 on: Yesterday at 03:49:00 PM 
Started by arch801 - Last post by arch801

I'm hoping you wise wizards can point me in the right direction. I had been looking for an early run u67 for many many years and finally found one I could afford (serial is in the 5000s), but the nu67 is for EU power. I want to be extremely safe with this and not take any risks running improper power to it, so any suggestions any of you may have as far as what my best options are to get this working in the US will be very much welcome.



 on: September 13, 2021, 11:40:33 AM 
Started by Matt Ogaz - Last post by klaus
Good news.
Please report back after your comparison test.

 on: September 13, 2021, 03:43:27 AM 
Started by Matt Ogaz - Last post by Matt Ogaz
Thank you both for the information! 

I cut the wire bridge on both mics and moved the termination of the red wire to the upper post. (I replaced the wire actually as it was too short to reach.)  After this, the formerly noisy mic is now a tiny bit quieter than the other one.  I am going to compare both mics to a pair in frequent use at a studio I work in. 

The pattern switches on both mics are somewhat noisy when switching.  I just ordered some deoxit gold to clean and lubricate them (in a needle applicator bottle, based on a recommendation found in another post on this forum.)

Thanks again for your help.


 on: September 12, 2021, 08:10:01 AM 
Started by Eddie Eagle - Last post by Papanate
I just saw this - it's and unfortunate sign of where things are at in the world - mastering isn't as valued as recording is.

 on: September 12, 2021, 08:03:59 AM 
Started by morls - Last post by Papanate
So, I was wondering if any of the more experienced engineers could suggest some listening to give more of an idea of what a well-balanced mix sounds like before going off to be mastered? Such material might not exist, but my thinking is that I'm not going about things the right way if I try to emulate the sounds of mastered recordings while mixing (specifically the overall sound energy, reverb tails, upper range EQ and final sparkle and polish).

Any help would be very much appreciated!

Listening to finished records can sort of assist you in your final mastering - the thing is you won't know who made the decisions that you like - like a reverb tail - was it the mastering engineer or mixing engineer or the recording engineer?  Getting to know the the mix before it goes to mastering is also not going to help - because there are so few examples - what you can do is search for stems of albums (Rick Beato has a lot in his video series) and listen to those.  It's quite an eye opener because different people have very different ideas on what to send to Mastering.

 on: September 08, 2021, 12:24:24 PM 
Started by Ernie Black - Last post by Ernie Black
We will be doing the forum upgrades overnight tonight, starting at 12:01am. The forums will not be offline as they were when they were being migrated, but anyone who is logged-in will likely be automatically logged-out if they are on during the upgrade process. This will bring us up-to-date with SMF forums software.

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