Post your Woodies

tubegeek

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@teletimetx - that Knight is intriguing - do you know how the "anti-feedback" switch works?

I really like this look, some great work on display. I'm a sucker for unusual grille cloth AND I love plaid, so @kleydejong gets three thumbs up. (Yes those are thumbs, not "woodies.")

My very first tube DIY project was this combo, it's sort of a Princeton Reverb preamp connected to a Champ single-ended output. I rebuilt it at some point and it didn't really improve matters, so it's due for a second rebuild at some point. Anyway this is a trapezoidal pine cabinet, walnut (?) stain and shellac. Some upholstery fabric for the grille.
20201017_091614.jpg
 
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Squawker

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Lommedalen, Norway
Tube-Town Molly - AC15/30 EF86 channel into an ECC99 output stage. Head shell from Tube-Town, treated with some flooring oil (similar to Tung oil).

It's standing on a cheapy-cheap SubZero cab that's had the Tube 30 swapped for a 10" Creamback.

Sounds so good that I haven't switched the AC10C1 on for a few months (and I love that amp).


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Squawker

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Nice head! Flooring oil? Got a pic of the container?
I'm always looking for ideas.

Thanks. It's this stuff... Tilja Floor Oil for indoor use, by Swedish flooring company Lundbergs. The can doesn't have any content details, but it's the usual wipe on, let dry, wipe on again, repeat. You could sand lightly between coats, or maybe buff a bit after the last coat. I didn't do too much, but I did go over the head shell with very fine sandpaper before starting. I was going to buy some gun stock oil, or the stuff for kitchen worktops, then I remembered I had this in the basement.



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teletimetx

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@teletimetx - that Knight is intriguing - do you know how the "anti-feedback" switch works?
Good question! From an audible response, it seems to thin out the frequency response, and also trims the volume slightly.

Apologies to all for a little thread drift.
Looking at the schematic, it looks like it just bypasses a single capacitor in front of the eq section in the pre-amp. That’s what it looks like to me- but I would defer to more knowledgeable eyes. Here’s the detail look:
0D9A605D-DDE9-4444-A706-8ACD863EE5FE.jpeg


And here’s the whole circuit:
CFDC009C-C10A-48EB-B313-566F892E9A5D.jpeg
 

tubegeek

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Good question! From an audible response, it seems to thin out the frequency response, and also trims the volume slightly.

Apologies to all for a little thread drift.
Looking at the schematic, it looks like it just bypasses a single capacitor in front of the eq section in the pre-amp. That’s what it looks like to me- but I would defer to more knowledgeable eyes. Here’s the detail look:
View attachment 775620

And here’s the whole circuit:
View attachment 775622

Thanks for the detailed info.

It seems to me that what you hear makes sense. When the .047 and the .01 are in series, the result is a bit less than .01. So it'd thin out the bass. Anti-feedback in the speech PA sense, probably works as intended and certainly a VERY inexpensive way to implement it.
 

awasson

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I need a proper shop... Just not sure where I can put it. Currently I’m a fair weather carpenter. If it’s not raining, I can roll my table saw out and set it up with saw horses for the run off. I’ve got a 12” bee box cabinet not finished and a couple of Tele things in mid production.

I did finish this amp.

7E02AF2A-1DEA-45DF-A70D-5CFEFB50C743.jpeg

And I built this tapped folded horn cabinet.

916DD1A9-A837-491F-8AA4-6484478D7970.jpeg

Oh and the speaker bar for my wife’s video/audio enjoyment

4975361C-1FF1-4615-AF4E-FC250780DF55.jpeg
 

Jazzerclean

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Inspired by Jason's thread..https://www.tdpri.com/threads/oil-finished-pine-cab-amp.1051504/page-2

My 5F2A is just linseed oil over Red and Yellow Cedar and after seeing Jason's six year old cab, I'm going to leave it and watch it age.
Please post yours for new ideas...!!

View attachment 775181

View attachment 775191
I made the first one out of pine with a plywood speaker baffle. The first one is for an open back 1 x 10" combo.

Now working on my second, a more upright closed back Swart stlye 1 x 12" combo with a sloping front made from a very old bee box.

I had to reverse the boards so I could have the indented handles on the boards on the inside of the cabinet rather than the outside as it was originally. You can see the indented handles on the inside of the cabinet in the pic's.
Many, many layers of paint had to removed as well, this one was not easy.
57f93a68-6df3-44c2-8bb5-5ce6986cd74c.png
 
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Jazzerclean

Tele-Meister
Joined
Jan 31, 2019
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I need a proper shop... Just not sure where I can put it. Currently I’m a fair weather carpenter. If it’s not raining, I can roll my table saw out and set it up with saw horses for the run off. I’ve got a 12” bee box cabinet not finished and a couple of Tele things in mid production.

I did finish this amp.

View attachment 775669

And I built this tapped folded horn cabinet.

View attachment 775671

Oh and the speaker bar for my wife’s video/audio enjoyment

View attachment 775672
My new sloping front Swart style 1x12 is made out of what seemed a 1000 year old bee box too!
It had only 64 (000) layers of old paint I had to strip off that was unbearably hard to get off.
 
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screefer

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kildonan
Here's my homebrew Harmony H400a in half-blind dovetail mahogany cab with walnut & padauk accents

Very nice woodwork!
Do you have a schematic/layout? I read that these were 'widowmakers'. Did you brew up an isolation transformer?
I also read that 400a was American and 400c Canadian.
 

CraigB

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Nov 6, 2009
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Central Coast of CA
Very nice woodwork!
Do you have a schematic/layout? I read that these were 'widowmakers'. Did you brew up an isolation transformer?
I also read that 400a was American and 400c Canadian.

Yeah, they are dangerous without a power transformer for sure. Even with a grounded three-prong power cord, I think connecting the filament string directly to the wall voltage is not a good idea. I used a 1:1 iso power transformer. I typically keep my hand-drawn layouts, I'll have to check to see if I kept that one when I get home. The schematic is available online. I got it from el34world.com.
 

Nickfl

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May 24, 2016
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Location
Florida
I need a proper shop... Just not sure where I can put it. Currently I’m a fair weather carpenter. If it’s not raining, I can roll my table saw out and set it up with saw horses for the run off. I’ve got a 12” bee box cabinet not finished and a couple of Tele things in mid production.

I did finish this amp.

View attachment 775669

And I built this tapped folded horn cabinet.

View attachment 775671

Oh and the speaker bar for my wife’s video/audio enjoyment

View attachment 775672

Well, if we are posting hifi speakers too...

I built this transmission line speaker earlier this year:

IMG_20200414_220646.jpg

IMG_20200415_212838.jpg




And just finished this floor speaker (Paul Carmody's amiga design) last week:

IMG_20201023_143510.jpg
 




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