EL36 / 6CM5 TESLA tube tubes store. TESLA EL36 / 6CM5 high power amp tube. Customers who bought this product also purchased. Class, Va, Vg2, Vg1, Ia, Ig2, Zout, Pout, THD. Line output, , , , B ( idle), , , , 36, 1, B, , , , , 38, 3,, , He offers a 6CM5/EL36 based 2 x 22 Watt Stereo Class AB1 triode amplifier, the fuss was about tube sound, while their solid-state amp’s are being repaired.

Author: Kajizshura Zulkisida
Country: Spain
Language: English (Spanish)
Genre: Photos
Published (Last): 24 August 2008
Pages: 379
PDF File Size: 9.70 Mb
ePub File Size: 17.10 Mb
ISBN: 966-9-72718-356-1
Downloads: 7441
Price: Free* [*Free Regsitration Required]
Uploader: Tauran

Looking at how much power you need to get a cherry red anode around 40 Watts all I can conclude is that the 12 Watt rating is conservative. Interesting they were, HiFi they weren’t!

EL36 / 6CM5 TESLA tube – POWER / OUTPUT tubes –

The anode is DC coupled into the grid of the cathode follower by a voltage divider which sets the 25V on the cathode. This means about 40mA anode current at V which is similar to the likes of 6M5, 6V6, 42, etc.

The tub this is connected means that if it should go open circuit which is the normal method of failure tubf a preset potthe 6CM5 will be throttled back.

The anode dissipation limit of this valve also brings some interesting questions to mind. The practicalities of using an audio transformer meant that a cathode follower tjbe would be preferred, and so a test circuit was tried. And there it was: My circuit yields somewhat more output than say a 6BM8.

Click on the image to enlarge and view the circuit properly. I tested all valves and they are fine. They are still holding in there with no change tibe any way. All is determined at which current you measure ra, as this can make a difference of a factor three with no problems. At first it seemed to be a lost cause, trying to use this valve as an audio amplifier.


My circuit provides about the theoretical maximum audio power from a V anode supply and 5kOhm load. It was so totally different from my EL84 amp, comparing mono to mono. In each channel, the 6CM5 TV line output output valves are connected as triodes and are driven by a long-tail pair using a 6CG7. Canberra based design engineer Patrick Turner is one who has investigated audio applications for the 6CM5. Drive for tuube upper valve V1 is from the anode of the first.

An anode voltage up to V, screen voltage of V, e36 a relatively low anode to anode load of 3. This I have yet to play around with. This in turn makes the anode voltage decrease, thus reducing the DC on the cathode follower output and therefore reducing the 6CM5 screen voltage which in turn reduces anode current.

They are tybe very rare nowadays, though they turn up now and then on Ebay but the prices are extortionate. It has been a while since I was last able to find some time to play with the EL Puts out about 70W, according to Philips. FIG 3 The total valve filament current requirement is: There is clearly a getter inside, but it is not flashed as it is of a tub that doesn’t need to be, fl36 cannot beflashed, but outperforms traditional getters.

A pair of valves were used in Class AB1 push-pull, with most of the output coupled to a modulation transformer and some driving another 4 in Class C yes, you read it correctly.


Nevertheless it can still be done as follows. Especially since the EL84’s were used as the drivers for the EL36, and so must have had their part in the signal shaping. They normally rate in as a 12 watt plate wattage, but there is a lot of talk out there that wl36 can and in fact do handle considerably more.


It only gave out 7W!

Data obtained from different sources indicate different tubee from 10 to 18 Watts dissipation for the anode and 4 Watts for the screen. The results were looking promising but still less than the requisite 4W was forthcoming. The Williamson Amplifier Revisited. I do not think that the full stories surrounding both this valve and the 6DQ6A, have come to light.

Click here to read Grant’s most informative article! The one referred to in this text primarily, is that with a top-cap anode connection.

EL36 / 6CM5 (RFT) tube – POWER / OUTPUT tubes –

Listening in mono, the instruments didn’t come from the speaker, but rather from somewhere around it. Really nice reverb, 2 x 12 speakers, uses two EL36 output valves, about 40Wcombo style, but not open back – the speakers are fully enclosed.

Although a plot of EL36 curves in triode mode appeared reasonably linear, the EL36 was found to perform relatively poorly in a simple single-ended triode-strapped configuration, exhibiting very obviously poor linearity. The screen-grid voltage is set by the 6CG7 cathode follower; about 25V is what is required for correct 6CM5 anode current.