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Old 25th April 2009, 09:53 AM   #1
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Default Best looking tube?

Frivolous question I know but one of the features that we all love is the look of glowing tubes.

I am thinking of shape and glow and considering both driver and power tubes.

My next build will be guided by the answers! I know this is bad
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Old 25th April 2009, 10:01 AM   #2
SY is offline SY  United States
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Default In the Small Signal category...

http://www.pmillett.com/glowing_hybrid.htm
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Old 25th April 2009, 10:57 AM   #3
Gordy is offline Gordy  United Kingdom
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Default Re: Best looking tube?

Quote:
Originally posted by Rob11966
Frivolous question...
I know this is bad
Yes; you are a very bad, bad boy.

Oh alright then...

304TL , especially with full enclosure as done by Moth (http://www.mothmuseum.com/mothaudio/m304tlhi.html) and Alum Rock (http://www.alumrocktech.com/photos/1a.shtml).

6C33 , but not particularly linear according to the datasheet, so best kept as a voltage regulator.

Almost anything from Sophia and Emission Labs (http://www.sophiaelectric.com/setube.htm, http://www.emissionlabs.com/html/products/products.htm)
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Old 25th April 2009, 12:13 PM   #4
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Well, the ne plus ultra of my ham-radio youth was the 4CX250:

Click the image to open in full size.

And I used this beauty, a 2E26 in my first 6m amplifier --

Click the image to open in full size.
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Old 25th April 2009, 12:39 PM   #5
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I have been putting parts aside to make a high powered monoblock for subwoofer based on a pair of 450TH's. That is the large beauty in the far right of the attached photo. Moving towards the left 833A, 805, KT88. I currently enjoy a SET stereo amp using the 805.
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Old 25th April 2009, 01:31 PM   #6
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That 703A is a fascinating tube. I think that is the first triode data sheet I have seen with no mu specified anywhere. What kind of voltage gain do you get with it?
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Old 25th April 2009, 02:28 PM   #7
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Quote:
That 703A is a fascinating tube. I think that is the first triode data sheet I have seen with no mu specified anywhere. What kind of voltage gain do you get with it?
I have a pair of those tubes and noticed the same thing. There's also a mistake on the physical dimensions in the datasheet. This page claims the mu is 12. Always wanted to use a CCS or choke load this as a driver for something larger. As far as sockets go you need to have access to a machine shop.

http://www.r-type.org/exhib/aaa0555.htm
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Old 25th April 2009, 06:07 PM   #8
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I'm not into the exotic types, but I think the old Tung-Sol coke bottle 6550's look kinda sexy, especially under dim lights and a few glasses of wine!
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Old 25th April 2009, 07:12 PM   #9
tvi is offline tvi  Australia
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Pedersen S3/500 ?

Regards
James
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Old 25th April 2009, 07:16 PM   #10
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Magic Eye tubes, such as 6U5, were no doubt selling point for radios in the 30's.
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