"6X2П-EB" ~ 6Z2PEV => Lo power, Hi-Frequency pentode.

http://tubedata.altanatubes.com.br/sheets/112/6/6Z2PEV.pdf

Cheers

Thank you!

It is even a gift! :dbtu:

Cheers

Roly

I say, without reservation, that this post is perfect.

Thank you very much!

Matec

Hawk

I think you are confusing information from the datasheet.

The tension of the heaters of a 12ax7 is 6.3V in parallel, or 12,6v in series.

The VH-K refers to the voltage of the cathode in relation to the voltage of the heaters. Since the cathode and the heaters are very close, this tension should not be above 180V under a risk of voltage leak or electrical sparks between these parts of the valve. (I hope this has been easy to understand).


Cheers

Hello Roly.

Thank you very much for your concern for the readers of this forum.

Really his explanation was huge and I'm even having trouble understanding all text content, due to English not being my native language.

But do not worry about my qualification.

The Peavey Classic 30, whose schema I have relied to give my answers, this is it.

And in them we can see that all EL84 have their filaments in series with AC power (probably a 25v). And the 12ax7 have their filaments powered by -36V DC.

It is unusual, and the principle is strange, but it is a problem of Peavey and not mine.

The statements I made, were specifically related to Peavey Classic 30

I always take care of my answers, and I think everyone should do the same.

Cheers

Yes, it is possible.

Despite the valve need the heaters to work, are independent circuits. So, in the EL84, the heaters may work, but the valve can still be damaged.

But one thing is certain; not keep damaged valves in an amplifier. :grr

Cheers

Yes your assumption is correct, if a valve fails, all other will turn off too.

The 12ax7 also have their filaments in series, if we remove one 12ax7, no pre valve will work.

To connect all the EL84 in parallel you need a source of 6.3V AC. (another transformer).

The reason, well, there is the Peavey that can answer ...

Cheers

Hello Loudthud.

Glad to have found someone who has ideas and research close to what I have done for many years.

I'm not a master in the art (as mr. KMG), but I noticed a parallel between our work.

Now I saw this and its other posts will follow them, and occasionally make some suggestions

Cheers
Matec

Hello.

On this site there is the scheme in question. Download the Service Manual of the entire Series One, which will have a lot of information about your amp.

http://elektrotanya.com/qsc_1100_1200_1400_1700_series_one.pdf/download.html

By accessing the page, wait about 30 seconds until the Get Manual link appear.
.

Cheers