8 Channel, 3U NEVE 1073 completed

[boomfred]

Good idea. Thanks for that.
Where did you find these little daughterboards (switchs & relays) ?

 

[Bakula]

Good idea. Thanks for that.
Where did you find these little daughterboards (switchs & relays) ?

I made them. Or rather, drew them up and had them printed.

The switch board is my design and very simple, but it acts as a "hub" for all of the power and other wiring which cleaned the whole thing up and made wiring much easier.

The board with the relays is basically a JLM GoBetween. I'd used the JLM boards on a couple of builds but needed more on a deadline when they were not shipping due to covid, so I drew up my own, but of course take no credit for that circuit.

I've been thinking about drawing up a board that combines all 3 into one and mounts vertically so I can do a 3U 8 channel like Martin but with the extra functions/switches.

 

[Clakejr]

What do you guys use to mount the Input and Output Transformers to the case

 

[Whoops]

I’ve used some L-brackets

like these ones:

 

[Clakejr]

I’ve used some L-brackets

like these ones:

Thanks looks like another Hardware store run

 

[Edward]

Hi,

Just started a 2ch EZ1290 build.

Can anyone recommend a good two position DPDT rotary switch with solder lugs and mountable on a frontpanel?

Thinking about adding a switch for Lo/Hi Z



Thanks, E

 

[buxlays]

Thanks, I'll take à look

 

[ZHOUJUN]

Very good!

 

[useme2305]

i built a 1U two channel a few years ago. i love it.

recently i put one of these in a desktop style hammond case. such a fun build. popped in a Jensen JT-DB-EPC as a switchable DI input.

 

[lars on]

Hi everyone !

I just finished another ez1290 and I have a bad voltage on TR1 Emitter, I have ~360mV instead of 0,4 Volts.
BUT when I switch on the unit the voltage is good during 5 secondes.
Maybe a bad capacitor ?
Anyone have an idea for that ?
Thank's

 

[lars on]

The unit seems to work correctly when I measure the frequency response.
Today I have adjusted the bias and I had this curve.
Did anyone had the same ?

 

[Whoops]

The unit seems to work correctly when I measure the frequency response.
Today I have adjusted the bias and I had this curve.
Did anyone had the same ?

Hi,
I've adjusted the Bias in many Neve units and the curve was always round, never seen anything like that.
I think there's something wrong with you measuring setup or with your unit

 

[jcarlding]

i built a 1U two channel a few years ago. i love it.

recently i put one of these in a desktop style hammond case. such a fun build. popped in a Jensen JT-DB-EPC as a switchable DI input.

Ha! I want to build this exact thing for a bass DI! Congrats on the sweet build. Any problem with having the PSU in the same box?

 

[useme2305]

Ha! I want to build this exact thing for a bass DI! Congrats on the sweet build. Any problem with having the PSU in the same box?

it is in the ballpark of the noise floor my ez1073pre modules generate in my 6 slot api linear psu lunchbox.

 

[jcarlding]

Thanks. If you don’t mind, which Hammond enclosure is that?

 

[useme2305]

Hammond 513-0900 Ventilated Steel Case 8.63x4.75x3.5"

 

[jcarlding]

Hammond 513-0900 Ventilated Steel Case 8.63x4.75x3.5"

thx

 

[jabe]

I recently completed a pair of these after many false starts and was wondering if anyone else found their EZ1290 hissy in the highest gain ranges? I don't expect dead silence from a vintage design at 70db gain but it's kind of a surprising amount of hiss. Just wondering if it's something I could improve or if it's the nature of the beast.

 

[Whoops]

I recently completed a pair of these after many false starts and was wondering if anyone else found their EZ1290 hissy in the highest gain ranges? I don't expect dead silence from a vintage design at 70db gain but it's kind of a surprising amount of hiss. Just wondering if it's something I could improve or if it's the nature of the beast.

I don’t know the amount of hiss you have… All preamps, vintage or modern will have hiss on the highest gain settings.
Neve preamps have some hiss, I think it’s even called “Neve Haze”, but that was never a problem to me in many years of recording

 

[jabe]

Thanks. It just seemed to be a lot more at the end of the range than other preamps I've put together, though of course it has more gain then most others, so that makes sense.