Page 1. Page 2. Page 3. Page 4. ECH81 Datasheet PDF Download – Triode – Heptode, ECH81 data sheet. Class, Va, Vg2, Vg1, Ia, Ig2, Ra, S, Notes. Static, , , , , Triode section. Frequency changer, , , Triode section. Static, , , , ,
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The conclusion is that measurements at high and low voltage show no significant difference between the two types. This indicates that the ECH81 was deemed suitable for low voltage service.
What are the criteria for such a selection? So the test can be done. From the side, through the screen, can be seen two sizes of electrodes. Collection of Bekir Yurdakul F. Collection of Alberto Zappacosta I.
RTT Franzis Collection of Danko Tkalec HR. Collection of Tomasz Szczesniak PL.
You reach this tube evh81 valve page from a search after clicking the “tubes” tab or by clicking a tube on a radio model page. Jacob has used it in many of his transmitter and receiver designs. Collection of Jacob Roschy D. When we look into the data sheets of the ECH83 and ECH81, one gets the impression we are dealing with two different tubes.
6I1P = ECH81 = 6AJ8 tube. Triode-heptode
The triode is to be used as the local oscillator feeding the 13 Volts amplitude sine wave to the heptode mixer. Meyer Attachments comparation 19 KB. The following results were obtained for 4 of each type. Collection of Christian Schaufelberger CH.
ECH81 Datasheet PDF –
It would be useful to assess further examinations and tests; in particular, codes on the Philips group tubes and possibly physical examination of the construction. This should not be offending because it is obvious that one can come very easily to wrong conclusions in such a situation.
When hunting around for suitable tubes, I stumbled over a very interesting case. Collection of Bekir Yurdakul F.
Collection of Karlheinz Fischer D. Collection of Ottmar Rollmann D.
This has raised some interesting points and a first quick test indicated very similar current and conductance values at low voltages also on the ECH81 which gives credence to the intial article. Collection of Wolfgang Bauer A.
ECH 83, Tube ECH83; Röhre ECH 83 ID, Triode-Heptode
The ECH81 triode heptode was designed in for the role of frequency changer mixer in superhet receivers for AM reception. The two valve sections share a common cathode. Collection of Patrice Zeissloff F. Collection of Oskar Elm D. Test voltage was 25 V.
They naturally show different values for a different usage volts anode. Collection of Hermann Fleischanderl A. You will find thousands of tubes or valves with interesting links. Text in other languages may differ. You will find thousands of tubes or valves with interesting links.