Looks like the Garolite that we use to make eyelet or turret boards from.DonMoose wrote:So, in that TubeLab setup, what are the modules made of? The breadboard is perf'd plastic, but the blocks are ... ?
Amp prototyping
Moderators: pompeiisneaks, Colossal
Re: Amp prototyping
Tom
Don't let that smoke out!
Don't let that smoke out!
Re: Amp prototyping
Amazing how we have gotten some of the names of common place items.This is where the term breadboarding came from, people literally taking their bread boards, putting a bunch of nails and terminal strips down, and wiring everything up point to point. Pic from Pete Millett's site.
Great picture of the amp on the breadboard.
Other than the extra noise from little to no sheilding, you could actually run with that amp for quite awhile providing you don't have kids or aninals around and careful where you touch.
Re: Amp prototyping
Very true,
Spent more time than I should yesterday checking out that site.
I liked his Turbo Champ Amp for guitar, but he has some other great ideas for High Fi sound as well. Have you gotten to the 300B amp section yet?
Spent more time than I should yesterday checking out that site.
I liked his Turbo Champ Amp for guitar, but he has some other great ideas for High Fi sound as well. Have you gotten to the 300B amp section yet?
-
markr14850
- Posts: 204
- Joined: Mon Jun 18, 2007 6:16 pm
Re: Amp prototyping
The current discussion about all things TubeLab is on diyaudio: http://www.diyaudio.com/forums/tubelab/
Re: Amp prototyping
I bought a circuit board from Tube Lab a while back.
The Simple SE amp.
I want to build a neat little Hi Fi tube amp to go with a turntable I have and some efficient speakers.
His designs incorporate some neat ideas.
The Simple SE amp.
I want to build a neat little Hi Fi tube amp to go with a turntable I have and some efficient speakers.
His designs incorporate some neat ideas.
Tom
Don't let that smoke out!
Don't let that smoke out!
FRY's
These bar terminal blocks may work.
They come in different sizes.
Fits with U shaped terminal lugs and a crimping tool.
I used these to wire up a PLC, 24vdc power supply, relays, brush motors and sensors.
May work good for bread boarding.
You can get these at Fry's Electronics for around $2.50 each.
Thanks for the ideas!
Decko
They come in different sizes.
Fits with U shaped terminal lugs and a crimping tool.
I used these to wire up a PLC, 24vdc power supply, relays, brush motors and sensors.
May work good for bread boarding.
You can get these at Fry's Electronics for around $2.50 each.
Thanks for the ideas!
Decko
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Re: Amp prototyping
the barrier strips work. well.
the photos below are of a 4E27A based 35W class A1 single tube AF amp being prototyped. B+ was at ~~540V employing cathode biasing with bypass to improve drive requirements. the 4E27A is a directly heated pentode and the filament draws ~~7.5A @ 5VDC. the driver is a 8pin sub-miniature 6948 dou-triode. it is normal for the 4E27A to red-plate since it is manufactured with a tantalum plate. old HAM radio guys could tune their antenna loading by the plate coloration. the weight of the iron alone would give you a hernia, and you get 35W classA champ-like guitar amp power for the weight just shy of an ampeg SVT. the bank of caps in the back is 4x680uF@450V wired 2 series stacks for 900V per stack. the PS is full wave with CLC+RC+RC filter with the plate tap after the choke.
it is called the glo-champ.
the breadboard in the pictures measures 24" x 30". my colleague and i built three, the last being an improvement making use of .325" spacing barrier strips, with the former two utilizing .463" spacing barrier strips. we used modified DIN rail mount 11pin relay sockets for noval tubes and DIN rail mount octal relay sockets. custom one offs for the sub-miniature, large septar, and a duo-decar sockets were also made. the third and newer board uses PCB or custom socket assemblies instead of the DIN rail. they are labor intensive to build and the fourth of the newer style for myself was never built. in retrospect, a larger variation of tube labs approach with barrier strips is what i'd build if i had it to do all over again.
thermionics are a lot of fun...
[IMG:800:600]http://i2.photobucket.com/albums/y11/pm ... 17_420.jpg[/img]
[IMG:800:600]http://i2.photobucket.com/albums/y11/pm ... -32_41.jpg[/img]
[IMG:800:600]http://i2.photobucket.com/albums/y11/pm ... -08_12.jpg[/img]
the photos below are of a 4E27A based 35W class A1 single tube AF amp being prototyped. B+ was at ~~540V employing cathode biasing with bypass to improve drive requirements. the 4E27A is a directly heated pentode and the filament draws ~~7.5A @ 5VDC. the driver is a 8pin sub-miniature 6948 dou-triode. it is normal for the 4E27A to red-plate since it is manufactured with a tantalum plate. old HAM radio guys could tune their antenna loading by the plate coloration. the weight of the iron alone would give you a hernia, and you get 35W classA champ-like guitar amp power for the weight just shy of an ampeg SVT. the bank of caps in the back is 4x680uF@450V wired 2 series stacks for 900V per stack. the PS is full wave with CLC+RC+RC filter with the plate tap after the choke.
it is called the glo-champ.
the breadboard in the pictures measures 24" x 30". my colleague and i built three, the last being an improvement making use of .325" spacing barrier strips, with the former two utilizing .463" spacing barrier strips. we used modified DIN rail mount 11pin relay sockets for noval tubes and DIN rail mount octal relay sockets. custom one offs for the sub-miniature, large septar, and a duo-decar sockets were also made. the third and newer board uses PCB or custom socket assemblies instead of the DIN rail. they are labor intensive to build and the fourth of the newer style for myself was never built. in retrospect, a larger variation of tube labs approach with barrier strips is what i'd build if i had it to do all over again.
thermionics are a lot of fun...
[IMG:800:600]http://i2.photobucket.com/albums/y11/pm ... 17_420.jpg[/img]
[IMG:800:600]http://i2.photobucket.com/albums/y11/pm ... -32_41.jpg[/img]
[IMG:800:600]http://i2.photobucket.com/albums/y11/pm ... -08_12.jpg[/img]
