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mordy

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EL11, EL12 and EL39 tubes are great tubes. A lot of Lampizator DAC owners have also been enjoying the EL51 (including myself). This tube was unknown to me until recently. The tube is even bigger than a 300B and requires an adapter for most amps. Tesla variety seem quite common. @Monsterzero is a big fan and encouraged me to get some.

I've also been trying out other related tubes in the ELxx family that are amazing. More to report later....
The EL51 has an anode cap and side contact base -1.9A.
How does it compare to the Telefunken EL6 Spez and EL12 Spez? Also have anode caps but German Steel base and 1.2A.
 
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Monsterzero

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post-16103398
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leftside

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The EL51 has an anode cap and side contact base -1.9A.
How does it compare to the Telefunken EL6 Spez and EL12 Spez? Also have anode caps but German Steel base and 1.2A.
Don't think I've tried the EL6 before. EL51 is more powerful than EL12. The Tesla is livelier with more of a punch in my system. I'm not saying it's better than the EL12. The Valvo, RFT and Philips EL12 I have are warmer. They get a mention here: (copy link to Google chrome and it will translate to English)
http://www.jogis-roehrenbude.de/EL34-Story/EL34-Story.htm

Even though I have quite a few different 6L6, I personally prefer the ELxx family of tubes. EL33, 6M6G, etc are all very similar:
https://www.radiomuseum.org/tubes/tube_el33.html
 
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post-16103937
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mordy

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Decided to dust off a pair Chatham 6AS7G that I have sitting around. Originally I had three, but one plunged to it's death during a photoshoot on my desk. Crummy feeling of loosing a tube to carelessness - I assume that it has happened to others as well. - Now I take the tube pictures with the tubes on the floor...
Here are the surviving plump and tall twins from November 1958:
1610587997652.png

They look similar to the RCA 6AS7G but by comparing them to a 1957 RCA they definitively are different. As far as I know only RCA and Tung Sol/Chatham made the ST shaped 6AS7 in the US. You can also find this tube made by Svetlana (Russia), Shuguang (China) and from Japan.
Compared to the Chatham 6080 they sound softer and not as hard hitting. Nice pairing with GEC Z63 (6J7G). The GEC pair consists of an Osram and a Marconi made at different times (1950/1953 and one taller than the other); they have different internals but sound the same.
1610589214301.png

In the back of the amp is a 4" USB powered fan. It has rubber feet but when I put it down on the chassis of the amp I got a little noise. Fabricated an advanced fan suspension system (a length of wire wrapped around a piece of the equipment rack and then hung the fan from the wire using a couple of rubber bands) - silence.
Before I took the above picture I had to remove the fan shroud I use to direct the air. It is basically a legal size envelope held in place by three N52 neodymium 12x2mm magnets. Why not N35 or N42? (If you want to know it is easy to find out...). Did you know that neodymium magnets were first commercially used in 1984? I think that they are important in headphones, but I digress....
1610590658409.png

So now you know the secrets of how to keep the amp cool. Maybe I should switch to a see through cover for the visual effect?
Have fun!
 
post-16104132
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mordy

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@mordy - LOVE the blue tube!!!! :stuck_out_tongue_closed_eyes:

1610591831272.png
That little blue guy is protesting against $200 tubes!
And smiling at the sound of the above tubes that now are waking up from a 60-70 year sleep - they really came to life now after a couple of hours of percolating!
 
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Velozity

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That little blue guy is protesting against $200 tubes!
And smiling at the sound of the above tubes that now are waking up from a 60-70 year sleep - they really came to life now after a couple of hours of percolating!

LOVE the Chatham 6AS7G. I still have 8 of them even after selling 4. Due to their smooth neutral character they work great with pretty much every driver. The perfect power tube IMO. If I want more slam and impact I would roll TS 5998 or 7236. If I want more euphony and authority across the spectrum I would roll Bendix 6080WB. But if I just want to "set it and forget it" and focus on rolling drivers, the Chatham is top choice.
 
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Xcalibur255

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The Chatham 6AS7G also wins bonus points for being more reliable than their RCA counterpart. Every RCA and Sylvania 6AS7 I've ever had has been unacceptably noisy.
 
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mordy

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The Chatham 6AS7G also wins bonus points for being more reliable than their RCA counterpart. Every RCA and Sylvania 6AS7 I've ever had has been unacceptably noisy.
As far as I know, the Sylvania 6AS7G are also made by RCA; the same for GE.
 
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Zachik

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whirlwind

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LOVE the Chatham 6AS7G. I still have 8 of them even after selling 4. Due to their smooth neutral character they work great with pretty much every driver. The perfect power tube IMO. If I want more slam and impact I would roll TS 5998 or 7236. If I want more euphony and authority across the spectrum I would roll Bendix 6080WB. But if I just want to "set it and forget it" and focus on rolling drivers, the Chatham is top choice.
Yep, these are nice tubes.
 
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Xcalibur255

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As far as I know, the Sylvania 6AS7G are also made by RCA; the same for GE.
All of the legitimate Sylvania tubes are RCA re-brands, but there are also the Svetlana tubes that are labeled Sylvania which doesn't seem worth the effort to me but then again I'm not a counterfeiter so I don't know their thought process. :p
 
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post-16106330
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mordy

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All of the legitimate Sylvania tubes are RCA re-brands, but there are also the Svetlana tubes that are labeled Sylvania which doesn't seem worth the effort to me but then again I'm not a counterfeiter so I don't know their thought process. :p
This pair is not counterfeit - only a Svetlana originally sold by a British rebrander:
1610674816433.png

Can you see the dual inverted saucer getters?
How much should this $30 pair cost?
https://www.ebay.com/itm/6AS7G-TUBE...142499&hash=item3b2f3cb70e:g:ZTEAAOSwdSRZ-5XN
Can be yours for $500...
Just to illustrate the thought processes of the scammers. Hey - you COULD perhaps find Haltron branded curved base GEC A1834/6AS7G tubes worth $500/pair but haven't seen any for a long time.
 

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Galapac

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This pair is not counterfeit - only a Svetlana originally sold by a British rebrander:

Can you see the dual inverted saucer getters?
How much should this $30 pair cost?
https://www.ebay.com/itm/6AS7G-TUBE...142499&hash=item3b2f3cb70e:g:ZTEAAOSwdSRZ-5XN
Can be yours for $500...
Just to illustrate the thought processes of the scammers. Hey - you COULD perhaps find Haltron branded curved base GEC A1834/6AS7G tubes worth $500/pair but haven't seen any for a long time.
The description on that pair is even more priceless...screams SCAM!! Got every buzzword in the book in that post.
 
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mordy

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The description on that pair is even more priceless...screams SCAM!! Got every buzzword in the book in that post.
Did not bother to read the description but now I did. Perhaps the seller was a little drunk?:
Manufacturer: Marconi, Great Britain
Then it says: Telefunken Western Germany
In fact, it was made by Svetlana, St. Petersburg, Russia.
Here We Ge again.....
Cannot understand how these guys get 100% feedback.
 
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