music, guitars & other obsessions


NAD: Brunetti Mille

I just got a vintage Brunetti Mille from Italy, I believe this one is the original version which was modelled after the CAE 3+ SE. It is very well built and came with Ruby 12AX7’s. My initial impression of the unit is very positive, surely better than most of the amps that I have built myself… So the preamp stage do make a big difference, duh!

Before I bought the unit, I was think about building one myself, there are some kits on the market, but after factoring the cost and time, especially the front panel and chassis drilling involved – the price on the used Brunetti was simply too good to pass up. As much as I like DIY, there is no way to make it as professionally looking and robust (unless you have all the necessary machining tools and how to use them) as the factory built unit.

Below are some pictures that I got from net, I actually quite like the unusal blue color of the front panel, it reminds me of the old Orban equalizers that I used to work on – and perhaps will acquire one of these days if the price is right.

Mille with Silverbullet Amp

Mille with the Silver Bullet Amplifier

Very nicely made PCB

Very nicely made PCB, this one with a MIDI interface, which I do not have…

NAD: Fender Excelsior

I got one today with the intention of modifying it into a Tweedle Dee, but before I do that I will play with it for a few weeks, perhaps changing out the speaker and see if the tone could be improved – even with a 15″, the amp still sounds bright to me…

Recording Arts… not!

I don’t know when it started, but it seems that many modern recordings are very poorly recorded or mastered, perhaps it is just the sign of the times, since most people listen to MP3’s on their cheap earbugs, sigh…

Marshall Major Mod

Here is an un-tested “mod” for the Marshall Major… Not so much of a mod as a new amp, since the output stage has been changed completely, so it is unlikely to sound anything like the original 200W Marshalls. Some have called it a Minor, which is more appropriate IMO.

Mashall Major Mod


What’s Playing

Screenshot - 6_16_2015 , 4_26_46 PM

Valveking to Vintage Modern, or VK to VM In A Few Simple Steps

I was thinking about modifying the VK212 when I first got the amplifier a few months ago, and came up with some potential modifications. But at the end, I abandoned the idea and went with a near-scratch build – so I took out all the PCB’s, and built put in a Marshall 2446 Vintage Modern clone instead. This worked out great, the chasiss has quite large so I had ample room to work with. Of course, I re-used the PT and OPT which were perfectly fine. I also saved the PCB’s from the VK in case if I ever want to put them back (which I doubt seriously). The only tricky bit was to modify the heater supply, since the VM uses one extra 12AX7 tube than the Vk212.

I don’t really like the series heater arrangement in the VK, but since the PT came that way, and I did not want add another filament transformer to the chassis, it would have to do. Of course, the disavantage is if one of the tubes go bad, the whole amp will be out of commission. Since it is just for home use, it is not a really big deal, but I would not want to take it on the road.

Instead of the 6L6’s that came with the amplifier, the output tubes have been changed to the 5881’s that I have laying around, so the output power was lowerer to about 75W. I also took the opportunity to add a bias adjustment board, which is the small board mounted above the power tubes that you see in the photo. It came from a scrap’d hi-fi amplifier. With the board, each of the output tubes could be biased individually, which was sorely missing from the original VK212.

With the existing VK speakers, the amp sounded a bit bright to me, then again, I still haven’t spend much time with it…

Here are some photos from the build:

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