Tightening up your Vott's

[Old Guy]

Well, that would explain the Heathkit grey/green 416-8A woofers with no markings or decals.

Altec often used up leftover stock in OEM cabs.

[bowtie427ss]

High Efficiency Speaker Asylum: Re: Waveguide geometries by tomservo

Posted here previously:

A-7 mods

Replace stock drivers with JBL-2226 and BMS 4550.

Replace lower vent panel with one having 4 , 4 inch dia ports, 5 inches long.
Pic #60

Reinforce 15” horn flares, glued in with construction adhesive not wood glue or epoxy.
I used boards which were 5 ? inches by 12 inches with one side cut to a 20 degree angle to better mate with the horn flare.. These are way too live.
Shown in pic # 62
Before and after is shown in measurement, gets rid of a few dips.

Optional, it wouldn’t hurt to put a 2X2 diagonally on the lower cavity side walls with a 2X2 added to tie the sides (from one side to the other) together.
I would use construction glue to adhere the 2X2’s to the walls and when dry, use screws to attach the cross brace.

Apply damping to the under side of the final bell of the 511 (not visible).
Mount the horn on the rear side of the wood, setting it back from stock.

Mount the 15’s with an extra front gasket for clearance at Xmax.

Use foam tape to seal all removable panels and replace the wood screws with 1 5/8 drywall screws.

Drizzle some extra glue at the front edge of the flare on the interior (the glue joint at the front where the bent plywood attaches. Use that gorilla glue (polyurethane) for this as it fills gaps. On this one there was a gap in the wood (on the inside).

Remove and remount the horn mounting board, remount 2 ? inches rearward and use the foam tape under it (which dampens the box top panel)

FWIW, and for clarity Mr Danley doesn't specifically recommend the JBL 2226. According to the thread where these recommendations were originally posted, those were drivers that the owner of the VOT's had on hand, and wanted to use.

[Alien_Shore]

Well I have copied everything from the Altec Pro website...So don't worry they are still available (.pdf's) if needed..

Not to be taken as critical, but how about putting that material up on this site? Are the hosting costs that are prohibitive?
You have long mentioned about building a reference library - what better time then now?

[GM]

Seems like they should go on Todd's site.

GM

[Altec Best]

Unfortunately I can't do it myself..I need Todd's input for this as he wants it on his site (Unofficial Altec Page).

[VolvoHeretic]

825 cabinet with nominal 3/4" 7 ply w/ plenty of voids plywood showing 1/4" by 1/2" rabbited corner.

After all of the discussion of 5/8" plywood, I started doubting my memory but...

[GM]

Pretty much guaranteeing it's not a factory cab............probably done by a cabinet shop for whichever local distributor handled the order same as was often done here in Atlanta after shipping charges started climbing up with the decline of the transcontinental railway system. That, or DIY.

GM

[C.DARRELL FREEMAN]

Pretty much guaranteeing it's not a factory cab............probably done by a cabinet shop for whichever local distributor handled the order same as was often done here in Atlanta after shipping charges started climbing up with the decline of the transcontinental railway system. That, or DIY.

GM

gm,do you have any idea who built the cabinets when altec was in anahiem,ca. and then when altec was in oklahoma city,ok.. or did the altec plant build the cabinets?thanks,darrell in birmingham,al.

[GM]

Well, when I visited it the late '60s we passed a section I didn't pay much attention to beyond a worker rapidly constructing 825 horn flares amid huge stacks of them on a jig off in the distance, but I wasn't impressed with any of Altec's cab construction, so wasn't interested in seeing that area. I know the late, great Barzilay did a lot [all?] of their consumer cabs by that time, which were pretty much 'top drawer' for the price and considering the condition of various ones sold in estate sales, they've withstood the test of time pretty well.

No clue about OK, but there's some ex employees here, so hopefully they will chime in.

GM

[bowtie427ss]

Weren't many of the furniture grade cabinets built by a company(Hill Craft) formed by the late Dr J K Hilliard's son?