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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Share This Page Your name or email address: Phone -FAX – I 3-500zz these several months back, out of an SK estate, in hopes of getting a amp. The 4 digit is year of manufacture.

Sold! Eimac Z | QRZ Forums

Design equipment so that no one can come in contact with high voltages. 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. I’m guessing those are date codes but no idea for certain. K7JOEJun 17, Sincere effort has been given to provide an accurate and correct replication.

Eimac, 3-500Z

Make sure that you’re familiar with the rules before posting or replying in this area. This will minimize thermal stress on the thoriated-tungsten filament wire, which can cause internal tube geometry changes with repeated cycling. Show Ignored Content Thread Status: My email address is good on QRZ. Other Z tubes were labeled and boxed soft and short to ground and those were sold eima a ham radio callsign display maker; I eima there was a method to eimsc madness.

I ultimately went with a solid state amp and then a backup amp which is B based and so I am not going to every use these Z tubes. I do not know what they are worth. This week I completed building it and am now testing and have a few minor items to adjust.

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The anode of the operates at a visibly red color at its maximum 3-50z dissipation of Watts. Air flow requirements to maintain the above maximum temperatures are tabulated below For operation below 30 MHz. Important Rules Have you read our Swapmeet Rules?

Your name or email address: 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.

Filament voltage, as measured at the socket, should be maintained within the range of 4.

3-500Z Tubes

Hi 3-500zz, not quite sure how to work this one but here goes: Your name or email address: Show Ignored Content Thread Status: It has only been provided to the aide of the Radio Amateur Community.

Tube dimentions Socket dimentions.

Sold pending funds from N8WS. Interlock switches must not be bypassed or “cheated” to allow operation with access doors open.

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. I’m open to reasonable suggestions too, as surely there’s someone who knows his way around amplifiers and Z tubes and is looking for a bargain 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.

SOLD – N.O.S. Eimac z tubes dates | QRZ Forums

K7JOEJun 16, But like all things in life, there are no guarantees to that and no way for me to test 35-00z. It’s a gamble though Otherwise, even though the base of the tube eimc reinforced, damage to the base seals may result. Further, no responsibilities, legal, financial or others will be accepted based on or connected to this page. All tubes have the plate cap that is attached by allen screw.

If grid bias is obtained principally by means of a grid resistor, the resistor must be adjustable to obtain the required bias voltage when the correct rf grid voltage is applied.

Click to go home. 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 grid current which results when the desired plate current is obtained is incidental and varies from tube to tube. KG9DDJun 17, See zero-bias operation in Application Section Approximate value Per tube Nominal drive power is one-half peak power.

These conditions assume rectangular drive waveform and a third harmonic, high-efficiency “Tyler” 3-500x Approximate value NOTE: 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 amplifier.

Breakage will result in in flying glass fragements, so safety glasses, heavy clothing, and leather gloves are recommended eeimac protection.