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6M6 (6M6)/EL33

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Forum » Tubes (Lampes) - Semi-Conducteurs » LAMPES / SEMI-CONDUCTEURS DANS LE MUSÉE » 6M6 (6M6)/EL33
           
Júlio Branco
Júlio Branco
 
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18.Apr.07 01:33

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Dear Members

 

This information can be quite useful for my friends of the radio. The tube 6M6 can also be substituted directly by the tube EL33.

Best Regards

Júlio Branco

Cet article a été édité 25.Apr.07 20:45 par Jacob Roschy .

Roy Johnson
 
 
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18.Apr.07 14:31

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The 6V6 and EL33 are NOT equivalent!  A hasty note of warning!

They have the same base, connections and heater volts but differ considerably.  THe heater current of the EL33 is 0.9A compared with 0.45A for the 6V6.

More seriously the biasing requirements are different and could cause dangerous excess anode currents.  Replacing an EL33 with a 6V6 without changing grid bias would not be a good idea!

The power limitation on the EL33 is 9W whereas the 6V6 is 12W; the output impedance is different.

Whilst it may "work" to exchange these tubes it should not be done without circuit changes.

Regards to all,

Roy

Ernst Erb
Ernst Erb
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18.Apr.07 15:25

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Répondre  |  Vous n'êtes pas connecté, mais en mode visiteur   3 Dear Júlio
I know that some literature is very lazy about subtitution of tubes and you often find a = for tubes which can be subtituted but only in one way or with some changes to the circuit - if one regards life of tube or circuit to be a concern.

Here we want to be quite exact and we give the = only for real "the same tube".

Can you please just remove the word "directly" (by editing your post)?
Then the very welcome objection from Roy still is true but also the hasty reader will not fall into the trap. Thank you.
Mario Bermejo
Mario Bermejo
 
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18.Apr.07 20:39

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Within its maximum ratings, 6AQ5 is equivalent to 6V6, however it is not a direct replacement. You must change the tube socket since the 6AQ5 uses 7 pin miniature and also check that maximum ratings are not exceeded. A cool thing about 6AQ5 and 6V6 is that they have same filament ratings.

Mario



Jacob Roschy
Jacob Roschy
Modérateur
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19.Apr.07 08:01

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Wrong Titel !
 
The titel [EL33/6V6] on this data sheet is wrong ! 
 
Instead of EL33 / 6V6 it should read [EL33 / 6M6] !
 
Any data shown in the diagram are those of the EL33 = 6M6 !
 
See also here.
   
Best Regards,
Jacob

Cet article a été édité 19.Apr.07 08:02 par Jacob Roschy .

Marco Gilardetti
Marco Gilardetti
 
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23.Apr.07 10:39

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I wonder why this message - if proven to be wrong - still lingers here.

Seen that the original author doesn't seem to care, nobody else has the authorization level to edit and correct the title from 6V6 to 6M6? Or to delete it altogether?

Ernst Erb
Ernst Erb
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23.Apr.07 13:14

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Dear Marco
Thank you for your post. I wanted to check how long it takes until somebody does the apropriate action. This should not be me !
Nothing happens if everybody wonders ...
It is very easy for a member to write directly to the author by clicking below the post the link ...

I did it now the following way:

"Dear Julio
When you begin a new thread please put in the automatic answer to get informed about answers and then check them.
Here the whole "crowd" is waiting that you correct your wrong postings - there are two threads.

When you post something please look up before if this is correct - here you could have seen on the data sheets that it is incorrect.

I suggest that you take the picture, print in red within it that ths should be  6M6 not 6V6
Then it is a valid information for all who again will find that picture elswhere!

Please tell me after having done so.
Thank you.

Cordially,
Ernest"

Cet article a été édité 23.Apr.07 16:17 par Ernst Erb .

Júlio Branco
Júlio Branco
 
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24.Apr.07 20:12

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Dear Members,

 

I ask all excuse goes my previous information. I was induced in mistake by the fact of my manual of tubes to incorrect be. We won't usually check the technical dates of to manual when this it informs us that equivalence direct exists, in fact, to present it date, I have been following the instructions of the manuals and I have always been having success in my work. Then the reason goes the which I don't have the habit of checking the manuals I or in correct the. Inclusively to removes you doubt if he had or in the tube averaged EL33 changed goes the 6V6, the in the manual he felt this information, I made the experience given that had available the tube 6V6, the radio worked, what concluded that EL33 was damaged. I removed to 6V6, I acquired an EL33, being like this with the concluded work and without noticing the mistake that was to commit. I already analysed the tube 6V6 and it is 100 percent, it was not damaged.

 

A  thank you very much goes all of the information that gave me on the tubes EL33, 6M6 and 6V6, once again it I confirmed that this forum is very important, and where it I been always to learn.

 

Best Regards

Júlio Branco

 

Cet article a été édité 26.Apr.07 00:04 par Júlio Branco .

Ernst Erb
Ernst Erb
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24.Apr.07 20:33

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Répondre  |  Vous n'êtes pas connecté, mais en mode visiteur   9 Dear Julio
Thank you that you reacted on my eMail.
Please always click the button "To activate e-mail notification" - so that you are automaticalle reminded if somebody answers your post.

If you want to be reminded if there is no anser (to bring the thread up again) you also click *** Please remind me ...*** and you can tell the system when you want your reminder!

Now:
Can you please bring in the sheet again but crossing out the V in red and writing M above it in red. Plus tell a reader from which boook and on which page it is.

Only by this a next one will not be catched again by this trap or try the same thing here ...
It is perfectly clear that normally we can rely on such data - you did nothing wrong (except not verifying). In such cases it is also sometimes posssible that no error occurs but that does not proof that it is correct. We just try to do our best here and I thank you that you have the same opinion.  I'm sure you will change the other thread too. Gracias.
  
rmXorg