DIY Audio Projects Forum
http://diyaudioprojects.com/Forum/

"Lacewood" Amp V2.0
http://diyaudioprojects.com/Forum/viewtopic.php?f=9&t=5736
Page 16 of 19

Author:  slack73 [ 01 Feb 2018, 07:55 ]
Post subject:  Re: "Lacewood" Amp V2.0

Figured I would post up my version of the Lacewood V2. I used a chassis and a pair of Hammond 1628SEA transformers I had sitting around from another project that never got built. The enclosure is maple, which I ended up painting instead of finishing and staining because I got impatient...
Not the best wiring job to say the least, but it did turn out hum-free, even without shielding the power supply.

It's currently being fed by a "Bourbon Box" 4S preamp and pushing a pair of Mark Audio full range drivers.
I'm really happy with the setup. It sounds fantastic, even with the oversized output transformers.

Big thanks to Suncalc for sharing this design!

Author:  john55 [ 01 Feb 2018, 10:51 ]
Post subject:  Re: "Lacewood" Amp V2.0

Unusual chassis design, looks really good. Color scheme works well too.

Author:  Suncalc [ 01 Feb 2018, 17:15 ]
Post subject:  Re: "Lacewood" Amp V2.0

slack73 wrote:
Not the best wiring job to say the least, ...
Not sure why you'd say that. I think it's a awesome wiring job! :up:

I also like the chassis design with the angles and different levels. And the handles on the sides are a nice touch. Overall, very cool. Good job!

Author:  Gio [ 01 Feb 2018, 20:37 ]
Post subject:  Re: "Lacewood" Amp V2.0

Fantastic work. I really love the color.

Author:  slack73 [ 03 Feb 2018, 07:11 ]
Post subject:  Re: "Lacewood" Amp V2.0

Thank you for the compliments. A friend used to have a 1950's Ford that was a similar color, so that is kind of where I was going with the enclosure.

Suncalc wrote:
And the handles on the sides are a nice touch. Overall, very cool. Good job!


At around 12 pounds per Watt, those handles come in handy!

Author:  Suncalc [ 15 Mar 2018, 19:00 ]
Post subject:  Re: "Lacewood" Amp V2.0

Since discovering (or maybe I should say rediscovering) this the other day:
Attachment:
DXz1muMVMAAjTMN.jpg-large.jpeg
I've been experimenting with various power tubes in the Lacewood V2 (as in the Marblewood) to see how the 6SN7 pairs with some of them. I've decided that, at least for soft Jazz, I really am liking the 6W6. In the past I strayed away form the 6W6 simple due to it's relatively high filament current (1.2A).

Now I know that was a mistake since the tube seems to really produce some fine sound in the Lacewood 2.0 design.

Author:  Soundbrigade [ 16 Mar 2018, 01:09 ]
Post subject:  Re: "Lacewood" Amp V2.0

WHAT???!!! No rubber grommets!!!!!!!!!!!!!!????????? :eek:

Author:  Suncalc [ 17 Mar 2018, 08:38 ]
Post subject:  Re: "Lacewood" Amp V2.0

Soundbrigade wrote:
WHAT???!!! No rubber grommets!!!!!!!!!!!!!!?????????
Yup. As can be seen in this photo, the end bells on big Hammond transformers come all the way down to the feet.
Attachment:
End_Bell_Alignment.jpg
This really doesn't allow any extra room for rubber grommets.

I inspected the wires when I did the rewire and there was not even an mark on the insulation. The holes in the aluminum top are properly chamfered and this seems to have done the trick.

Author:  Soundbrigade [ 17 Mar 2018, 09:28 ]
Post subject:  Re: "Lacewood" Amp V2.0

OK, got it. You are forgiven ...

I am picky with grommets myself, though when buying at local (auto) stores they are $1,50 a piece and at the "electric thingy store" at the mall they "weigh in" at a dollar each.

Author:  Suncalc [ 17 Mar 2018, 11:23 ]
Post subject:  Re: "Lacewood" Amp V2.0

These are much cheeper, but I don't know if the shipping would make them expensive for you as well.
https://www.tubesandmore.com/products/grommet-rubber-chassis

Page 16 of 19 All times are UTC - 6 hours [ DST ]
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/