I have used the Neutrik 4- or 5-pole many times for AC or DC in at my preamps and active crossovers.
The current is so low in preamps (very often around 100 - 200mA) that I never had worries or problems.
And Neutrik is professional stuff at an reasonable price. Not the cheapest.
Sometimes I also use the REAN stuff from Neutrik.
Cheers
Dirk
The current is so low in preamps (very often around 100 - 200mA) that I never had worries or problems.
And Neutrik is professional stuff at an reasonable price. Not the cheapest.
Sometimes I also use the REAN stuff from Neutrik.
Cheers
Dirk
The attenuators arrived yesterday so I was able to finish the balanced Iron Pre today. The Eizz controls are very nice. The build quality looks great. The rotation is smooth, and there are no glitches in the make before break all through the range.
I had ordered the chassis from Hifi 2000, and I had to bore out the front panel cutouts a little because the main shaft is slightly thicker than what was specified for the chassis VCs, although if you follow ZM's suggestion of using an extension, this won't be an issue.
ZM - thank you, the preamp sounds very great upon first power-up. ItsAllInMyHead and others who've worked on this, thank you.
EIZZ also have a screw on the side of the body to adjust tension of the spring for the amount of torque required to turn the dial shaft. This can be useful if the knob being used is smaller than usual.
If you can find a 4-gang pot or attenuator, use it! 🙂
If you have not used them before, mono volume potentiometers will seem to be a less than optimal solution. However, when you use it, you may find it very good! I did not expect to like it, but I do. Also, it allows the use of easily-available potentiometer.
If you have not used them before, mono volume potentiometers will seem to be a less than optimal solution. However, when you use it, you may find it very good! I did not expect to like it, but I do. Also, it allows the use of easily-available potentiometer.
and, just as reminder, there are pics "how to pot" for both SE and Bal - in post #1
I built my balanced Iron Pre with one pair each of XLR and RCA output jacks. I've only hooked up the XLR jacks. Can I take the RCA output directly from the XLR ground and positive phase pins on the output jacks, or is there a better way to do it?
Thanks,
Alan
Thanks,
Alan
Well it was a fun build. I am a total beginner and somehow managed to make this preamp sing. Most of my parts came from Newark electronics and Ebay so I was waiting for awhile for all the parts from China to show up. Toroidal transformers are 15v secondaries. Using with a F6 and a M2, goes plenty loud.
Areas of learning for me include,
Areas of learning for me include,
- Not jumpering J5
- Flipping a Jfet
- mixing up the wires for the XLRS
- mixing up the 12 volume control wires
- jumpers from - to Gnd for the SE inputs
Attachments
Oh Lord Oh Lord, please keep me from flipping a 'JFIT'. Doh!
I can SO relate to this stuff. For me it might be drilling a hole not quite center, though I did all of the precautions, except a correct measurement.
I can SO relate to this stuff. For me it might be drilling a hole not quite center, though I did all of the precautions, except a correct measurement.
And I spoke too soon, I guess I pinched the left ribbon cable between the pcb and stand off. So when I tightened everything up I got some magic smoke. Looks like ZD1 and ZD 2 are toast, not sure about M3. Off to order new parts. 🙁
I took some measurements of my balanced build today. The measurements are very good even though I didn't use volume control extensions. However, I assumed, being a balanced build, that the second harmonic would be lower than the third, but see that it is still predominantly second harmonic. I just wanted to check that this is the expected behavior, and that I didn't wire anything up incorrectly.
Thank you
Thank you
frankly, I never measured Iron Pre
simply - didn't felt any need
for both SE and Bal, if built properly - you'll get enormous fun factor preamp
so, why bother
simply - didn't felt any need
for both SE and Bal, if built properly - you'll get enormous fun factor preamp
so, why bother
Ok, you guys. Parts didn't arrive today, and there is an underlying panic beginning to grow. Did the Fed-Ex driver get lost? Was there a robbery? Where the hell did I put my binoculars?
Wait a tick. Tracking says it is coming per USPS, and it has arrived in Casper Wy. When something lands in the deep dark vortex of Casper, anything can happen.
Wait a tick. Tracking says it is coming per USPS, and it has arrived in Casper Wy. When something lands in the deep dark vortex of Casper, anything can happen.
That sounds like our area. Your stuff is probably with my stuff that shows that it was "left inside resident's mailbox" but clearly was not left in MY mailbox...
It's like socks and the dryer...
C'est la vie.
It's like socks and the dryer...
C'est la vie.
I used to get the neighbor's outgoing mail, and even big bags of dog food for somebody who lived two blocks away, on the other side of the street. You had to carefully wait for mail if there was something important coming your way, and when she showed up, she would argue about having any package for you. Then she would admit, "Well, there IS an envelope (you know the really big ones) for you."
You should take a look. They are very Zen. Like the sound of one hand clapping.