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Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by jack butler, Jan 15, 2005.
i want too attach a pic of my new turret board (its pimpin)
how do i?
It must be put somewhere on a web server.
Send me that picture, I'll host it and give you the link.
thanks thames, comin at ya!
btw, had it done by an extremely nice fellow named martin at a [place called total tone, i believe he's in canada as well.
here is a link too my nerw dual bias board
check it out!
tell me what ya think
Correct link :
Very nice work, Jack.
hope i'm not patronising or generally annoying you people by asking, but seeing as i'm just a random violin dude with a genuine interest, what does this thing do? and what are the yellow bits?
parkstains - The rectangular thing in the pictures is a circuit board for a Marshall style amplifier. It is a very clean example of what is called turret board construction. That is where the parts are all soldered to the little silver posts shoved in the little holes on the board itself.
The little yellow things appear to be Mallory 150 series capacitors.
ah, thanks, so i guess this is the kind of thing that makes an amp tick.
so this is some awesome diy job done by a bloke called martin of total tone in canada?
i'm no expert but looks pretty slick!
that is correct tybone!
the board looks pretty sick huh?
project is about 1 month from being finished.
it will have mercury mag power, output and choke running el34s with a b+ of 360 and a gz34 rec tube
it is a dual bias as well
and also features a pentode triode switch
I think you all missed the obvious!
There is a Hockey player there on the right side of the
board, just waiting to fore check someone the criticizes
Nice layout by the way,
So, now we want to see it in am amp. : )
ockey hookey hockey hookey
Yeah I'm interested in those little bias pots that
Any one know what brand. They look a tad simpler to use
then doing it the <sound city> way.
Sorry to burst anyone's bubble, but get hold of an old copy of Mil-Std-454. It shows everything the military learned about attaching parts to turret boards in aircraft and other environments that are almost as bad as driving around with your amp in the trunk. Only one resistor here has any strain relief.
Very nice work. Making boards is by far my favorite part of the process.
Shame shame shame....shame of fools.
I count at least TWO with strain relief.
There are possibly three.
I still like the hockey players knee pads on the right.
any one have associated part numbers?
Aeolian, do you have an extra copy of 454?
I like all the old specs.
i guess i'll have too take my chances
i hope everything turns out okay.
thanks for the input.
Don't have MIL-STD-454. It's been superseded by MIL-HDBK-454, which you can get here
Did a bit more digging around on the hard drive.
Here's MIL-STD-454, Rev. N. Reads a lot like the handbook. But before you dig through it you should probably understand that 454 is mostly a reference to other standards.
Probably of much greater interest is MIL-STD-2000 which sets the standards for soldered electrical equipment. Specifically, the requirements for strain relief on turret soldered connections can be found on page 14, Section 188.8.131.52.
I was part of the development of Mil-2000 which came from WS-6936. There's less on turrets there. There was an older spec that I can't remember, something like Mil-S-1969 or some such that really got into hard wiring and turret connections. I've got to go though my old stuff in preparation for moving. If I find it, I'll post the number and the hard copy goes to the first person who PM's me.
If you helped write the 2000 series of stuff then my hat's off to you. For the curious, MIL-STD-2000 supersedes 20 or 30 standards that came before it.
And, just for the completeness of the thread, the Federal Government's ultimate bible on how to solder (in any way and using any material imaginable) is MIL-HDBK-2000 "Soldering of Electrical and Electronic Assemblies", weighing in at a whopping 212 pages that, for the average user, can be summed up in several short sentences:
"Keep everything clean"
"Use the right temperature, solder, and amount of solder"
"Heat the part AND the terminal"
"Let it cool before you touch it"