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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, 205 views)
File Type: gif Gun Director Op Amp 1942.GIF (28.5 KB, 198 views)
File Type: gif KM2_OP_AMP.GIF (27.2 KB, 194 views)
File Type: jpg my_favorite_programming_language_is_solder_pease.jpg (22.0 KB, 193 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.
“Information is not knowledge Knowledge is not wisdom
Wisdom is not truth Truth is not beauty Beauty is not love Love is not music Music is THE BEST”
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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.
"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
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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
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File Type: jpg 0-to-0.JPG (63.3 KB, 121 views)
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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..
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
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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, 35 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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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:
Click the image to open in full size.
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