There is nothing quite like the warm tone and smooth transition offered by an amplifier tube like the Tesla PCC88/7DJ8 dual triode vintage tube. This vintage tube replaces the ECC88 NOS tube and is often referred to as the Tesla PC88/7DJ8 NOS tube. When you have a discerning ear and prefer the sound of an analog radio or amplifier to the cutoffs and harsher tones of a transistor, then you need a supply of vintage vacuum tubes. This model is considered one of the best manufactured by Tesla. This model features a double-supported getter and boxy, anodized plates. These amplifier or audio tubes are still used used in many contemporary-made amplifiers and radios that are compatible with this tube type. The Tesla PCC88 vintage tube is a replacement for the NOS 6DJ8/ECC88 tube. You do not have to adjust the heater voltage as any of the 6DJ8/ECC88 circuits work. The PCC88 has a 7-volt heater and works at 6.3 volts, which prolongs its life. Since this tube is pin compatible with the ECC88 tube, you should be able to use it wherever you use the ECC88. If heated with the proper voltage, the PCC88 tube helps create great-sounding audio. It is used in the EAR-Yoshina preamps and power amps. Many audio enthusiasts report excellent performance of the PCC88 tube in their 6DJ8 and 6922 tube circuits without modifying anything. There are often construction differences in the tubes. For example, the PCC88/7DJ8 can have fat getter rings or thing getter rings, big font labels or regular font labels, and other cosmetic differences; however, there are no differences in how they perform, and they are generally sold in matching pairs. Boxes may be tossed around during shipment, causing the content to shift. This causes the pins on the audio tube to bend, but they are malleable and can be straightened and used upon arrival. Tesla tubes were relabeled and sold by Valvo, Telefunken, and Siemens in the 1980s when the original Western European (Tesla) audio tubes were no longer available. The NOS in the PCC88 NOS audio tube means New Old Stock, and this refers to tubes that were made years ago but have yet to be used. Most of these NOS tubes are from brands like RCA, Sylvania, and GE; however, most of these are copies of the original Tesla tubes. Whether you are a collector of vintage vacuum tubes or an audiophile, these tubes have what you are looking for. For collectors, the authentic look of the tube completes many a collection. For audiophiles—stock up. Whether you are looking for balanced audio for your amp or preamp, you can never have too many replacement tubes.