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Inside The Secret Underground Laboratory

A few more updates on the general craziness here in the Secret Underground Lab;

The visit by the Cub Scouts (a few posts up) got written up in the local newspaper, the Fillmore Gazette. Well, the Fillmore Girl Scouts saw the article, and now they want in too. We'll be setting up a tour for them soon, as well as some other various school groups.

And I'm going to be giving a talk soon at the Fillmore Library, to a bunch of youngsters. The general subject is going to be about Building Things, discussing what Art, Craftsmanship, and Engineering are. We'll see how it goes.

The Movie Shoot Madness continues. We did a two day shoot the week before last, and have a three day shoot coming up this week. And it looks like it's going to become a fairly regular thing for a while. These are scenes for the TV series Shooter, the continuing adventures of Bob Lee Swagger, ex-Marine Sniper. They are working on the third season episodes now, which will be shown later this summer. There are a bunch of scenes in underground bunkers and grimy basements, and our building is working out real well for them. Plus they are also shooting some scenes at other nearby locations around Fillmore. They are renting several units down at the far end of our basement, storing props in them and re-configuring them to be various set rooms. They love the old walls and beams and plumbing and stuff.

They are very happy so far working with us, and it looks like they may be coming in every two weeks or so through the summer. It's somewhat of an inconvenience for us shop guys, but it pays really well for our landlord David. And he needs the income to pay for all the repairs and improvements on the building, and to keep our rents low. Plus, it brings in good revenue and value to the city. And we're still in a battle over zoning and building use permits and requirements. This all helps the overall cause of what we're trying to do with this building.

On Shoot days, everyone else is basically shut down. We can be in our shops, but we have to be quiet. Jon's and Keith's shops are fairly well insulated, so they can mostly work. Rob, Mike and I can't run any machines during the shooting hours. Rob and Mike only come in a couple days a week, so they've just been arranging their schedules to avoid the Shoot days. For me, I do most of my heavy work at night anyway, so it isn't cutting into my working time too much.

During the Shoot day, I function as a Site Manager, watching over our shops and helping with any questions or problems related to the building. They give me one of the set radios, so I can listen to all the ongoing chatter among the crew, and they can call me if needed. It's fairly interesting to listen to. TV Series shoots like this are surprisingly complicated and tightly scheduled. There's maybe 100 people in the building, shuffling in and out by the minute. About 20 box trucks parked outside, loading and unloading lights and sound and props. Limo vans pulling up, dropping off actors. It's a madhouse, but pretty well choreographed. At the last session, they shot about 20 scenes in one day, several takes each.

More of it this week. I mostly stay hunkered down in my shop, working on the computer and listening to the set radio. When they finally wrap up, around 5 or so, the place empties out in a half hour. All the people and trucks vanish. Suddenly the building is quiet again. Then I can take a quick nap, and get back to work building basses!
 
You may have seen on the Love Of Ampegs Part 2 thread that my friend George Biondo visited the Lab a week ago. Here's a picture of him, taken by me, holding my AMB-2 #001:

IMG_5601B.jpg


George also enjoys photography as one of his skills and hobbies. He shot a few quick pictures of my shop while he was here, and kindly sent them to me. They are very nice.

Here's the Secret Entrance to the Secret Underground Lab. Don't tell anyone.

Bruce's Underground shop B.jpg


Here's a look down the hallway. You can only see about halfway down, because the lights are off down at the far end.

Bruce's Underground tunnel B.jpg


Here's a nice view of the main aisle of my shop. Some old geezer is standing there, rambling on about machines. Or something. That's my little world, that I've created.

Bruce's vintage equipment B.jpg


Another view down the other woodworking aisle:

Bruce's shop-3 B.jpg


And the cross aisle, towards the machine shop. This is where I live and work.

Bruce's shop-2 B.jpg


And here I am, dressed in my formal shop uniform, holding AMB-2 #001. AMUB-2 #011 is on the bench. That's in the electronics lab area.

Bruce Johnson-2 B.jpg


And finally, here's our shipping and receiving department. No, not really. But it could be. This is down the hall, in the middle of the building. In the background is the old freight elevator, circa 1935. We've cleaned it up and restored the hydraulic system. It's fully operational, but not certified for use. And it just goes upstairs into the back corner of one of the other guy's shops anyway.

In the foreground is a circa 1930's freight cart, horse-powered, that was used to transport cargo over to the trains. It's in moderate shape. We've been collecting genuine old Sunkist orange and lemon crates that came from this plant back in the day.

Rob Allen's shop is about 20 feet to the left.

Bruce's Orange crate cart circa 1914 B.jpg
 
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Taken from another thread as I didn't want to derail it with my questions.

On that same subject, here are the Mini-BruceBars, which I use on some other clients' necks, particularly when the hole pattern isn't symmetrical.

Same basic idea, just short blocks of 3/8" square brass. A single 10-32 hole tapped in the middle. Set into routed slots in the top of the neck. In this case, I don't bother to round off the ends of the blocks. I just cut the length so that they wedge down in against the rounded ends of the slots.

View attachment 2929780 View attachment 2929781
Bruce, do you feel the use of smaller threaded inserts like these
142105.jpg

still make enough of a difference in the overall coupling between the neck and body to make a change in an instruments overall tonal character and response?
 
Taken from another thread as I didn't want to derail it with my questions.


Bruce, do you feel the use of smaller threaded inserts like these
View attachment 2940813
still make enough of a difference in the overall coupling between the neck and body to make a change in an instruments overall tonal character and response?

Only a small amount, if any. To hear a real improvement in the sound (low end clarity, in particular) the neck heel and body need to be clamped tightly together, pressing the wood surfaces against each other, to make the neck/body joint rigid. Much tighter than you can get with the normal wood screws threaded into maple. That style of metal inserts, which thread in from the bottom, aren't really much stronger than good wood screws into maple, in terms of how much force will rip them out.

Using steel T-nuts or my style of brass bars (the infamous BruceBars) installed from the top of the neck, before the fingerboard goes on, provides a much greater surface area clamping the wood together. Part of that clamping ability includes the other side too. The heads of the screws have to be in a strong neck plate or large diameter ferrules, to provide good surface area on the back side of the body.

I'm not saying that these round brass inserts are a bad thing or a waste of money. They are an improvement over wood screws, particularly if the screw holes in the neck are worn out and not able to be tightened up fully. If the neck was weakly attached before, then you may notice a difference in sound after installing these round threaded anchors. But if the neck was tightened solidly with wood screws before, then you probably won't notice any difference.

So, to me, the round threaded inserts are fine as a good repair. They are at least equal in strength to the wood screws, and they offer the advantage of being able to install and remove the neck many times without damage. But they aren't strong enough to do the level of clamping that I want.
 
Thank you for the thorough explanation Bruce.
I have a Roscoe bass that uses those small brass inserts epoxied into the neck, and attached with machine screws with ferrules.
Here's a rear shot of a Roscoe for reference.
5541-BACK-1200.jpg

I was curious if you feel the neck attachment method on Roscoes is inherently "better" than your average wood screw/neck plate.
 
I was curious if you feel the neck attachment method on Roscoes is inherently "better" than your average wood screw/neck plate.

I think it's better in terms of being higher quality construction and more solid and durable over time. Improving clarity? Maybe a little. Roscoes are solidly designed and built already. I'd be interested to know if they've noticed any sound difference from using the inserts.
 
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I think it's better in terms of being higher quality construction and more solid and durable over time. Improving clarity? Maybe a little. Roscoes are solidly designed and built already. I'd be interested to know if they've noticed any sound difference from using the inserts.
Gotcha.

With all the other builders out there, do you feel there are any "off-the-rack" makes whose construction and design details "get it right", or at least match up closer than others with regards to your approach to engineering and designing a bass?



As an aside, I know you're busy, but I'd love to see a thread where you go over the pros/cons/trade-offs of conventionally built basses versus your basses/approach to building and engineering. From neck construction to bridge mounting.
 
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A few more updates on the general craziness here in the Secret Underground Lab;

On Shoot days, everyone else is basically shut down. We can be in our shops, but we have to be quiet. Jon's and Keith's shops are fairly well insulated, so they can mostly work. Rob, Mike and I can't run any machines during the shooting hours. Rob and Mike only come in a couple days a week, so they've just been arranging their schedules to avoid the Shoot days. For me, I do most of my heavy work at night anyway, so it isn't cutting into my working time too much.

During the Shoot day, I function as a Site Manager, watching over our shops and helping with any questions or problems related to the building. They give me one of the set radios, so I can listen to all the ongoing chatter among the crew, and they can call me if needed. It's fairly interesting to listen to. TV Series shoots like this are surprisingly complicated and tightly scheduled. There's maybe 100 people in the building, shuffling in and out by the minute. About 20 box trucks parked outside, loading and unloading lights and sound and props. Limo vans pulling up, dropping off actors. It's a madhouse, but pretty well choreographed. At the last session, they shot about 20 scenes in one day, several takes each.

More of it this week. I mostly stay hunkered down in my shop, working on the computer and listening to the set radio. When they finally wrap up, around 5 or so, the place empties out in a half hour. All the people and trucks vanish. Suddenly the building is quiet again. Then I can take a quick nap, and get back to work building basses!

I realize that you are all taking one for the team but my god, this has to be uber-annoying. What an unwanted interruption and distraction. It would drive me looney to the point I would seriously consider moving to a new location.
 
I realize that you are all taking one for the team but my god, this has to be uber-annoying. What an unwanted interruption and distraction. It would drive me looney to the point I would seriously consider moving to a new location.
Eh. They have a great (and BIG) building and what Bruce characterizes as decently affordable rent - making some bank for the nice landlord to help fund some of the BIG maintenance/upgrades on that BIG building without having to charge tenants BIG rent seems like a pretty good tradeoff. Think of it as a day you (not Bruce, who's minding the lab and liaisoning) might just as well go surfing...they are in SoCal, after all. ;-)
 
Eh. They have a great (and BIG) building and what Bruce characterizes as decently affordable rent - making some bank for the nice landlord to help fund some of the BIG maintenance/upgrades on that BIG building without having to charge tenants BIG rent seems like a pretty good tradeoff. Think of it as a day you (not Bruce, who'd minding the lab and liaisoning) might just as well go surfing...they are in SoCal, after all. ;-)

Yep, go surfing is right. Two Day Shoots? Three Day Shoots? I only have full access to the machines in my shop 2/7ths or 3/7ths of the time each week during the daytime hours? A series? Shoots going on into the future for who knows how long, and I have no control? As Bruce states, they love the place, I don't see this going away anytime soon.

Sorry, would drive me looney as previously stated. God bless brother Bruce for being a nite-owl, but it definitely wouldn't work for me. I suppose certain laid back personalities might be OK with it, but this New York boy would be out of there. I would be making a beeline to finding a special real estate friend and sticking my toe in the proverbial waters. As far as I am concerned it goes beyond a building "loyalty" issue at the point where nearly half my daytime shop hours each week are in jeopardy.

But that is just me.
 
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This girlscout is gonna be around your way late July. I'd love to drop in and see the lab if possible. Just for a quick visit. I'll have a tool widow outside. ;)

Sure, you are welcome to visit the Lab. It would be great to meet you after all these years of talking online.
 
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Hey, I’m rather local, near the roller coasters (you know where that is). Maybe a TalkBass SoCal get together and tour in July?

Hello Steve (or is it Bob?);

I assume that you mean the Magic Mountain/SantaClarita area? The thriving metropolis of Fillmore is about 22 miles to the west, down past the farms.

Sure, I'm generally willing to have visitors of local Luthiers and serious bass enthusiasts, as long as you make an appointment first. I already know most of the LA area Luthiers, and many of them are my clients and/or long time friends.

And, if someone wanted to organize a small group (like 5 people) to visit at one time, I can handle that. More than that would be kind of crowded.

On a bigger scale, we're starting to think out some larger events, working with the Fillmore & Western Railroad and even the old Fillmore Theater, which is a few blocks away. Some initial planning is in the works for a "Music Train" event, centered around Jon Wilson's GuitarViols. He's got customers and fans throughout the movie soundtrack business here in LA. The idea is that about 100-300 people would buy tickets for a compound show. It starts out with a train ride down the valley and back, with a nice dinner on the train and some known musicians with Jon's instruments walking the aisles. Then the train stops at our building, and the guests get an hour long presentation by Jon about the technical features of the instrument and demonstrations by various artists. Then they go over to the theater for a concert of some form.

If that works out, an obvious idea would be to do a bass version. Keith Horne, Rob Allen, myself and maybe a few other local bass builders. Not a hardcore sales pitch show, but a demonstration and talk about bass technology, design, sounds. And maybe an all-bass concert in the theater!! This is just a concept so far, but it could happen.
 
More busy times here in the Secret Underground Lab.....

Another movie shoot here last week. Just a quick one-day shoot, in the afternoon here in our basement. Then the crew moved across the street, where they dressed up one end of the Fire Station building to look like a bus station in Baltimore. The brought in a couple of city buses and cars and filmed some scene of action and drama, well into the night. Amazingly, it was lightly raining the whole time. Just like Baltimore. Very unusual, we normally have maybe 7 rainy days per year.

TrainFest is coming up. Rides and fun on the real trains, plus a giant model train layout is going to be set up upstairs in the open event area of the building. It's one of those model railroad club deals, where a bunch of members each build a module of the layout in their home shops, then they bring them all together and assemble them into a big layout for these special events. The real trains will be taking crowds for rides and dropping them off here for the model train show. Fun stuff.

Here are some pictures of me giving a talk last week at the Fillmore Library, a couple of blocks away. My audience is a group of 5-10 year olds, mostly girls, and a few parents. My talk is about Building Things, a look at Art, Craftsmanship, and Engineering. What these fields are, and how they work together. I used examples of paintings, wood sculptures, furniture in the Library, and one of my Scroll Basses. The overall point was to show how we use elements of Art, Craftsmanship and Engineering together to make all the things we see around us. Get that creative spark lit.

The people at the schools and the Library are interested in having me give talks like this on a regular basis to kids. This one was sort of a test run. This group of kids was a little too young. They absorbed parts of it, but were glazing over and getting restless when I got into explaining what Engineering is. But the Teachers loved it, and think I've got something good here. We're trying to figure out how to frame it to get an audience of teenagers to come to the talk.

bruce-library-03-14-18-2.jpg
bruce-library-03-14-18-3.jpg
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One funny moment I remember: I was just trying to get the talk started, and they were all trying to ask questions. One little girl was frantically waving her arm and when I called on her, she simply said "My brother has a guitar". I had to pause and chuckle while I figured out how to answer her. That's the difficulty of trying to lecture to small children.

Last night, I gave a quick talk at the Fillmore Association of Businesses meeting over at City Hall. Next week, I'm giving a longer talk at the Rotary Club. Then they also want me at the Lions Club and a few other groups. I'm starting to become pretty well known around here. The local mad scientist from the Secret Underground Lab.