The internet...

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johnnyreece
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The internet...

Post by johnnyreece »

"Don't trust every schematic you find on the internet." - Abraham Lincoln

Seriously, folks, make sure to verify a schematic you find on the Google-machine. I cooked a couple parts by following the directions...Luckily, it was only a $2 lesson... :oops:
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Dr-Joned
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Re: The internet...

Post by Dr-Joned »

No worries here, because I know they can't post it unless it correct. :lol:
I Think I Think Too Much !
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Leo_Gnardo
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Re: The internet...

Post by Leo_Gnardo »

Some schematic drawer-uppers are notorious. I'm not namin' names but I'd double check anything with aPizza on it... :shock: ;)
down technical blind alleys . . .
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Structo
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Re: The internet...

Post by Structo »

WHAT!

Something on the internet is not true???? :shock:
Tom

Don't let that smoke out!
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johnnyreece
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Re: The internet...

Post by johnnyreece »

Indeed, Tom. I couldn't believe it at first myself. I decided to try a cheap-o amp with some tubes I had kicking around and came across this:

http://www.kirtland.com/guitar1/MA1_fil ... _Amp-1.gif

+50 Internets to the person who finds the mistake...Otherwise, it's a cool little design. I'm still fiddling with it, and will likely make my own schematic/layout for others when I get done. Really is a simple/cheap design.
Teleguy61
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Re: The internet...

Post by Teleguy61 »

Am I wrong or is there 60 vac through the heaters?
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Phil_S
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Re: The internet...

Post by Phil_S »

Teleguy61 wrote:Am I wrong or is there 60 vac through the heaters?
I think that works. It's a 50V tube + a 12V tube. Close enough.
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jelle
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Re: The internet...

Post by jelle »

That first e cap in the PS.
Teleguy61
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Re: The internet...

Post by Teleguy61 »

Phil_S wrote:
Teleguy61 wrote:Am I wrong or is there 60 vac through the heaters?
I think that works. It's a 50V tube + a 12V tube. Close enough.
Got it. Series.
Thanks.
jam-mill
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Re: The internet...

Post by jam-mill »

Don't trust every layout you find either (http://ampgarage.com/forum/download/file.php?id=14586).
John 15:12-13
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martin manning
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Re: The internet...

Post by martin manning »

jam-mill wrote:Don't trust every layout you find either (http://ampgarage.com/forum/download/file.php?id=14586).
So, what's wrong with that one?
jam-mill
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Re: The internet...

Post by jam-mill »

martin manning wrote:
jam-mill wrote:Don't trust every layout you find either (http://ampgarage.com/forum/download/file.php?id=14586).
So, what's wrong with that one?
Martin,

See the commentary here (http://ampgarage.com/forum/viewtopic.ph ... 198#332198); first two radial electrolytics are backwards. Compare it with this one (http://ampgarage.com/forum/download/file.php?id=39648), which is known personally to be correct.
John 15:12-13
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martin manning
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Re: The internet...

Post by martin manning »

Ah, yes I had forgotten about that. A fine trap for the paint-by-number types.
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johnnyreece
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Re: The internet...

Post by johnnyreece »

jelle wrote:That first e cap in the PS.
You win the internets! :lol: I blame my unfamiliarity with voltage doublers for not catching it before the smoke...

I also didn't like the inputs, so I wired them a bit differently. Not bad for a budget build. I will try to update that schematic to my "as-built" version in its own thread later.
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kkregsg
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Re: The internet...

Post by kkregsg »

This is just my very biased and possibly deranged opinion, but as with schematics, many TABS on the internet are horrendously far away from reality. I ascribe this to all the meth freaks unable to sleep, doing them while they are totally out of it, and then posting anyway.
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