Has anyone built the A40M class-A amplifier?
It was a Norman Thagard design published in Audio Electronics.
Carlos
It was a Norman Thagard design published in Audio Electronics.
Carlos
A40M Parts List? Board Pattern
I just reread the A40M articles in Audio Electronics (starting Sept. 1999) and thought it might be fun to build but...there does not appear to be a parts list in the series. Was it ever published? Also..has anyone done a board layout for it? I'm fairly inexperienced at scratchbuilding so I am somewhat intimidated when it comes to designing the layout.
Has anyone, other than the author, built this amp yet?
thanx
rt
I just reread the A40M articles in Audio Electronics (starting Sept. 1999) and thought it might be fun to build but...there does not appear to be a parts list in the series. Was it ever published? Also..has anyone done a board layout for it? I'm fairly inexperienced at scratchbuilding so I am somewhat intimidated when it comes to designing the layout.
Has anyone, other than the author, built this amp yet?
thanx
rt
If I remember correctly, some of the parts were difficult to get (discontinued, maybe?) I think Dr. Thagard answered a letter concerning this somewhere in one of the (6?) issues.
I think a PCB would be necessary to build this, and was disappointed that one was not offered.
What a great series of articles, though. His explanations are superb. He obviously has a knack for instruction.
I think a PCB would be necessary to build this, and was disappointed that one was not offered.
What a great series of articles, though. His explanations are superb. He obviously has a knack for instruction.
A40M
The parts list (I don't know how I missed it!) is on page 11 of Audio Electronics Issue 5 of 1999. The schematic is on page 10 of the same issue. Issue 4 of 2000 has the letter that was referred to in a previous post (by paulb) that contains information on parts. It can be found on page 49.
I am curious if anyone has built it or layed out the artwork for the boards.
rt
The parts list (I don't know how I missed it!) is on page 11 of Audio Electronics Issue 5 of 1999. The schematic is on page 10 of the same issue. Issue 4 of 2000 has the letter that was referred to in a previous post (by paulb) that contains information on parts. It can be found on page 49.
I am curious if anyone has built it or layed out the artwork for the boards.
rt
A40M Schematic
As weird as it sounds I don't have any easy access to a scanner....let me see what I can do...if I can't get it scanned I'll just mail it to you...a photocopy.
rt
As weird as it sounds I don't have any easy access to a scanner....let me see what I can do...if I can't get it scanned I'll just mail it to you...a photocopy.
rt
A40M Schematic + Board pattern
carlmart,
that would be great! looks like we have some interest in building this amp!
rt
carlmart,
that would be great! looks like we have some interest in building this amp!
rt
Main scans (1)
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
Main scans (2)
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
Main scans (3)
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
Main scans (4)
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
Main scans (5)
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
These are the five main scans for the A-40 project, but I had to zip them.
The parts that were missing I did add, as well as correcting a resistor value which was wrong on the list.
Have a look and tell me if something is wrong.
Carlos
A40M Schematics + Board
carlmart they look great. Did you do the board layout? Have you built an amp for this layout yet?
Again..many thanx!
rt
carlmart they look great. Did you do the board layout? Have you built an amp for this layout yet?
Again..many thanx!
rt
A40M
The articles were in AudioXpress 1999-2000. There were 4 articles I believe. The easiest thing to do may be to buy those two years of issues.
rt
The articles were in AudioXpress 1999-2000. There were 4 articles I believe. The easiest thing to do may be to buy those two years of issues.
rt
A-40 articles
All articles, or even one, are very much out of the question. There were six of them, many pages long each.
They certainly make very interesting reading.
And I didn't design the pcb or built the amp. The pcb might need a redesign to adapt the SK and SJ FETs.
In fact I do think every DIYyer should design their own pcbs according to the parts one is going to use. Plenty of shareware programs in the web to do that.
Carlos
All articles, or even one, are very much out of the question. There were six of them, many pages long each.
They certainly make very interesting reading.
And I didn't design the pcb or built the amp. The pcb might need a redesign to adapt the SK and SJ FETs.
In fact I do think every DIYyer should design their own pcbs according to the parts one is going to use. Plenty of shareware programs in the web to do that.
Carlos
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