http://www.diyaudio.com/forums/multi-way/304395-my-altec-model-19-crossover-build.html
I posted this over at the "Multi-way Loud Speaker" forum but feel it could be useful in the Construction Tips forum as well. Just another way to build something.
BillWojo
I posted this over at the "Multi-way Loud Speaker" forum but feel it could be useful in the Construction Tips forum as well. Just another way to build something.
BillWojo
This way has been common for many years for older stuff... originally Bakelite was used, don't see it much these days but its great for crossovers etc.
Then we started putting the circuit on the Bakelite, hence the term printed wiring board.
Then we started putting the circuit on the Bakelite, hence the term printed wiring board.
Hello marce, for those that have been around for a while, turret board construction is nothing new. I have several amps from the early 60's that use it.
There is however the younger crowd on here that might benefit from seeing how simple it can be done. Careful layout and a drill press can get one very nice results. Nice brass hardware can be found at a good hardware store or at most industrial supply houses. The substrate that I used was fiberglass but if no heat is involved even a piece of lexan or other unbreakable plastic will work as well as would wood. Opens up a lot of design possibility's for the DIYer.
BillWojo
There is however the younger crowd on here that might benefit from seeing how simple it can be done. Careful layout and a drill press can get one very nice results. Nice brass hardware can be found at a good hardware store or at most industrial supply houses. The substrate that I used was fiberglass but if no heat is involved even a piece of lexan or other unbreakable plastic will work as well as would wood. Opens up a lot of design possibility's for the DIYer.
BillWojo
You can still get the turret pins, I do work for a couple of interesting firms and some assembly is still done using turret pins and board, though you can get pre-drilled boards that the turret pins just push into.
I would recommend that a fire retardant base board is used in all circumstances just to be on the safe side, the best choice would be bare FR4 or similar... just to be safe.
I would recommend that a fire retardant base board is used in all circumstances just to be on the safe side, the best choice would be bare FR4 or similar... just to be safe.
As Marce says.....
DIY turret boards are still quite popular with guitar amp builders.
You can get the turrets and boards from several suppliers - Hoffman amps is a reliable supplier.
Tube Amp Circuit Board Building parts
More info at:
Hoffman Turret and Eyelet Boards
There are also videos online which describe how to drive/set turrets.
If one wanted to get a 'really vintage' board, brass nails into solid lumber (a.k.a. breadboard) would be a throwback to the 1920s diy world. Not recommended where there is a heat/fire hazard 😱 .
I used GP03 electrical grade fiberglass. Since these will be used with low power tube amps on sensitive Altecs I'm sure there will be no heat involved. I could have used wood or plastic but my sensibility's said to use the GP03. I first looked on Ebay for the material and was surprised at the price, than I looked at McMaster Carr and found it was much cheaper.
I know about the press in turrets but I didn't want to solder directly to the turrets. This is going to be much easier to modify.
BillWojo
I know about the press in turrets but I didn't want to solder directly to the turrets. This is going to be much easier to modify.
BillWojo
Its not the heat generated with electronics during normal operation, its the heat generated when something goes wrong, always think about that, safety first, second and third is my motto.
Another interesting prototype method from the past was wire wrap... 🙂
Another interesting prototype method from the past was wire wrap... 🙂
> another way to build something.
That can't work.
The Modern Way: You have to master Eagle, churn a mess of files, send them off to an Asian PCB etcher, who will (a month later) send back a dozen boards with the errors you made etched perfectly, so you re-do in Eagle and try to get someone else to look at it (bore-ing), shovel your files around the world AGAIN and wait and wait....
Your way only needs a drill and a screwdriver to build and modify. How old fashioned. Anti-Progress.
That can't work.
The Modern Way: You have to master Eagle, churn a mess of files, send them off to an Asian PCB etcher, who will (a month later) send back a dozen boards with the errors you made etched perfectly, so you re-do in Eagle and try to get someone else to look at it (bore-ing), shovel your files around the world AGAIN and wait and wait....
Your way only needs a drill and a screwdriver to build and modify. How old fashioned. Anti-Progress.
- Status
- Not open for further replies.