The Original grounded grid triode introduced in the early s. Now obsolete part number. Power dissipation: w. EIMAC Z. Later version of Z. The EIMAC Z is a compact power triode intended to be used as a zero- as high as twenty times can be obtained with the Z in a cathode-driven. Tube Z or Röhre Z ID, Transmitting Triode, air cooled, SPECIAL TUBEBASE in Brand: Eimac (brand name) Typ ZG mit Graphitanode.

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Sold! Eimac Z | QRZ Forums

Share This Page 3-500z name or email address: This week I completed building it and am now testing and have a few minor items to adjust. I ultimately went with a solid state amp and then a backup amp which 3-50z B based and so I am not going to every use these Z tubes.

Show Ignored Content Thread Status: Register for a free QRZ account. W0OLLJun 17, Further, no responsibilities, legal, financial or others will be accepted based on or connected to this page.

Intermodulation values listed are those measured at the full peak envelope power noted. K7JOEJun 16, Hi All, not quite sure how to work this one but here goes: Two Z tubes in a single amplifier, chassis mounted, may be adequately cooled by use of a fan so mounted as to pressurize the space below the sockets.


N5FUNMay 10, The Elmac Z is a compact power triode intended to be used as a zero-bias Class AB 2 amplifier in audio or radio-frequency applications. After research I do not have the equipment or know how to De-Gas the tubes before use and did not want to risk using them so I installed a set of RF Parts ZG’s I had for another eimca.

Thoriated Tungsten Voltage 5. Not open for further replies. In all cases, air flow rates in excess of the minimum requirements will prolong tube life. This page has ben scanned and OCR’ed from the Eimac data-sheet.

3-500Z Tubes

The Eimac tubes have never been installed or tested and due eeimac age and possible gassing issues your are buying them at risk and I will not take returns. Adjustment of the rf grid voltage to obtain the specified plate current at the specified bias and plate voltages is assumed.

Click to go home. KG9DDJun 17, See zero-bias operation in Application Section Approximate value Per tube Nominal drive power is one-half peak power.

Sold! Eimac 3-500Z

These conditions assume rectangular drive waveform and a third harmonic, high-efficiency “Tyler” circuit Approximate value NOTE: For best tube life, the inrush current to the filament should be limited to two times normal current during turn-on. Local pickup is welcome and I will except PayPal, money order, cash. K7JOEJun 17, I can only assume they are good-spare as they were marked as such by the former owner good-spare on a note affixed to each of the 3 tubes.


I’m open to other interesting stuff but I’d like to keep the lot of 3 tubes intact as someone who gets them can getter them all, test them, and likely wind up with 1,2, or 3 good tubes. The Rotron “Spartan” fan rpm is also suitable, as is a 3, 3 inch squirrel cage blower 31 00 rpm all cases, the only criteria of proper cooling is the temperature of the tube seals Tube temperatures may be measured with the aid of temperature sensitive paint, spray or crayon.

All tubes have the plate cap that is attached by allen screw. Make sure that you’re familiar with the rules before posting or replying in this area. These figures may change without notice as the result of additional data or product refinement. The kit came with 2 new Eimac Z’s with date codes as seen in the pictures, I broke the seal on the boxes last week in order take pictures of the tubes and double check the date codes.

The 4 digit is year of manufacture. They have not been tested in an amp. Go take a chance! N5FUNMay 9,