Neurochrome 686 Amplifier build - 2022

Somehow I knew that would be the text in this post. Well done and looking good!

Excellent work. Glad to hear it is taking its first tentative steps. I wonder how it compares to the 686 I have here??😁

Good job Oli, enjoy.

Won't have the front on for a week or so as I need a momentary switch and no point putting all that together to have to take it all off to fit the switch.

The case makes the modushop ones look like biscuut tin. It's massively heavy, rock solid and doesn't sound like a bongo when you tap it. I only use the same seller. He's a bit more expensive, but he posts with FedEx and has 100% reliability with me.

Case is here:

a.aliexpress.com/_mOMr88A

Cheers Ali. I'm knackered. Been building since Tuesday.

Playing now and sound cracking already.

Well done Oli, nice to see a well thought out build happen, look forward to listneing to it at the shidig ina few weeks top stuff mate.

Cheers T.

Nice to get a positive comment from a professional. 👍

pete

Too much has changed in the system to give any accurate comparison with the 686 you have. I imagine once your all in one Avalon BT2 lands, you'll be happy as Larry!

Here, but this is the seller who's case never arrived here.

a.aliexpress.com/_mKU8ttk

I will certainly look forward to hearing this on May 8th.

That is the good thing about the Modushop case base plate. It gives you a nice big earth plate.
but yes, you need to make sure you have continuity.

It's a short run, so looking at it from a technical perspective, you should be able to push around 11A through 1mm² solid core. Resistance is none existent, so for the 5" of wire with 11A current capacity, it should be fine.

Voltage drop is an issue of a significant length of wire, but I suppose resistance can be a factor if the cable is too thin, but 1mm² isn't exactly thin gauge.

I've used 24awg on output before without being aware of an issue.

I think there is a lot of conflicting information, but I ran it past phonomac and was given the green light, so I'm not gonna worry about it lol

Thing is, how many folk out there are putting 4mm² power cable into their Amps when the house has 2.5mm² and the inside of the amp likely has 1.5mm² hookup wire in. Same principle?

Yeah, but I know guys with 6mm² Silver mains cables, into DIY Valve amps that they wired up with 1mm² hookup wire.

If you use logic, there can be little to no value going above 2.5mm² power cable, unless you lose voltage/gain resistance at the point of plug to wall socket connection.

I know that I don't lose Voltage, as I still get a massive 247v out of the wall on the end of a 2m mains cable.

Regardless of whether I use 1mm², 1.5mm², 2mm² etc, all the way up to 6mm², I still get 247v.

If you abandon logic, I can tell you when I have 4 or 6mm² mains cables in the system because the bass goes Nucking Futs.

I read the Allen Wright Valve amp cook book and he swears that the best sounding gear uses 0.1mm² enameled copper.

I thought "he's off his tits". I tried it, he may have a point.

I've wired two BT2's with exactly the same PC-CCC, one with 30awg one with 24awg.....they sound different.

The wire is only 6" long at the longest part.

From a technical standpoint, I don't believe there is a reason that 5" of 1mm² solid core PC-TRIPLE C is an issue on the speaker outputs.

From a sq standpoint, who the F knows lol

I mean, look at the wire they use in speakers! Is like bell wire and that receiving the same signal that the amp is putting out....

This AWG guide suggests that resistance for a 0.8mm² solid core cable is 21ohms/1000m and is rated for 9.5A

I don't think it's an issue.

Ha, no worries Bruce.

Yeah, it's over rated for the work it's doing and technically more than adequate, but yes, if I had enough of the Acoustic Revive speaker cable, I probably would have used that.

Moot point, as I didn't and I'm not buying more!