emc 215 tube tester reprint manual with tube data

It is probably a quarter inch shaft and the one I see in an online picture is a chicken head knob with a set screw. If it is only the knob that needs replacing you can find something that will work. Finding someone who is parting out the same tube tester is your only option unless you want to research the values used in similar tube testers in hopes of finding some that used the same pot and that would expand the pool of parted out tube testers that could serve as a donor, if you are lucky. The variable shunt resistor probably dissipates some power, it would be a custom design most likely, and replacements are not easily obtained. If you can't find any indication you can use a 630 V cap which is certainly overkill but they are common and cheap enough. The voltage is probably marked on the cap. There are no voltage markings on the schematic that would guide us. Replace it with a modern 0.022 uF cap with a voltage rating equal to or greater than the original. The 0.02 uF cap in series with the shorts test neon bulb is likely to be the cause of the shorts test issue. I'd also like to replace the shunt variable component and/or plastic knob, could someone tell me what I should buy as a replacement? Would a loose wire to PIN 7 / switch 7 cause the tester to show a short? I can see where someone must have opened it up prior cuz a screw is missing and another flathead was replaced with a Phillips.Ĭan someone verify (I'm reading the schematic from reprint manual for the 213/215) whether or not I'm missing any capacitors / resistors as I'm fairly new to reading schematics:įixed value resistors of in ohms: 1 Meg, 1.5, 270, 2K, 100, 1.2K, 750 adjustable, and 1KĪmmeter 5 M.A. I'm seeing where it says all of the tubes are shorted on PIN 7 which leads me to believe the tester may need repair. I just purchased an EMC Model 215 off of eBay, and tried to test with NOS tubes compared to the tubes that was in both radios (one from eBay and one that was my grandparent's old radio both AA5 RCA 55U & 65U).

Emc 215 tube tester reprint manual with tube data