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Old 1st March 2013, 05:22 AM   #1
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Default TubeLab SimpleSE Buildup begins

Started getting the parts together for my first buildup. The Tubelab SimpleSE seems like a reasonable place to begin. It's been years since my last tube adventure - an old HW-100 ham rig (not a typo - it was the forerunner to the much more famous HW-101, but you'd be hard pressed to tell them apart).

I'm really in awe at the amps that I've seen in this forum - you guys certainly set a high standard for excellence!

I'll give fair warning before plugging the box in the first time I wouldn't want anybody startled by a sudden flash over the horizon...
Attached Images
File Type: gif Nike_Op_Amp.gif (47.2 KB, 198 views)
File Type: gif Gun Director Op Amp 1942.GIF (28.5 KB, 191 views)
File Type: gif KM2_OP_AMP.GIF (27.2 KB, 187 views)
File Type: jpg my_favorite_programming_language_is_solder_pease.jpg (22.0 KB, 186 views)

Last edited by rfengineer2013; 1st March 2013 at 06:56 AM. Reason: Correction
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Old 1st March 2013, 10:30 AM   #2
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Interesting idea, however I don't want to be a killjoy or stopping your thread, but most people want as few gainstages as possible.
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Old 1st March 2013, 10:35 AM   #3
SY is offline SY  United States
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Rule #1 (hardly ever followed): Before starting a project, outline exactly what it is you require it to do. "Functional specifications" in product development jargon. This really makes things MUCH easier.
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Old 1st March 2013, 04:23 PM   #4
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Thanks, SY. For now, it's a straight SimpleSE buildup with the only change being that I will use two preamp tubes - one for each channel. The idea is to build a "test bed" for further experimentation, possibly using the (at present) unused triode in each preamp tube in later modifications.

The GIFs I posted were originally part of an April Fool thread - but the fool is me, it turns out... Been a long winter, I lost a month someplace (it's only March 1 today )

Still... it's another option to play with later!

And dang - now I gotta come up with a different April 1 thread!
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Old 1st March 2013, 08:51 PM   #5
Ketje is offline Ketje  Belgium
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Well...I have an other one for you
Mona
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Old 1st March 2013, 09:12 PM   #6
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Sweet, Ketje! And SOOO much easier to read than the gifs I posted!

So very much cooler (or hotter!) than a puny little LM-741.

(Mods - I hope this isn't too "off-topic" for the forum. My rationalization would be "Hey, it's an amplifier and with suitable feedback would indeed function as an audio amp. Not that it would be a good idea to do one this way - but it's another glimpse into the world of Tube amplifiers.

Hope you guys don't mind.

RF Dude )
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Old 1st March 2013, 11:32 PM   #7
wicked1 is offline wicked1  United States
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I'm just trying to figure out how to plug it in to an 8 pin socket.
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Old 1st March 2013, 11:43 PM   #8
kevinkr is offline kevinkr  United States
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Seems perfectly on topic to me, the thread afterall is about tube op amps..

Don't forget the Philbrick tube op-amps..
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Old 2nd March 2013, 01:44 AM   #9
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@kevinkr & wicked1 - here's the Philbrick K2-XA op-amp with application note. It looks like they solved the 8-pin socket problem :-)
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File Type: pdf Philbrick K2-XA Operational Amplifier.pdf (611.7 KB, 31 views)

Last edited by rfengineer2013; 2nd March 2013 at 01:49 AM. Reason: Attachment 2nd try...
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Old 2nd March 2013, 01:59 AM   #10
JMFahey is offline JMFahey  Argentina
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Quote:
Originally Posted by wicked1 View Post
I'm just trying to figure out how to plug it in to an 8 pin socket.
Easy !!!
The Philbricks (and doubtless many others) *did* plug into an 8 pin socket

One of these, of course:
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