369:. Although power pentodes and beam tetrodes have some differences in their principles of operation (the beam forming plates of the beam tetrode or fifth electrode (3rd grid) of the pentode, both serving to hinder the return of unabsorbed electrons from the anode (or plate) to the 4th electrode (2nd grid)) and have some internal construction differences, they are functionally closely equivalent. Unlike the 6L6, (EIA base 7AC) the EL34 has its grid 3 connection brought out to a separate Pin (Pin 1) (EIA base 8ET) and its heater draws 1.5 Amps compared to the 0.9 Amp heater in the 6L6. However, Sylvania (and possibly GE) marketed a tube as 6CA7 which was not only in a markedly different 'fat boy' envelope, but used a beam forming plate much like a 6L6. Examining the mica spacer on the top of the tube will confirm the lack of a suppressor grid. Although these tubes have similar (but not identical) characteristics, they are made very differently.
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144:
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29:
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in push–pull configuration. However, this configuration is rarely found. One application of this type was in "Australian Sound" public address amplifiers commonly used in government schools in
Australia in the 1950s, using four EL34s for ≈200 watts. More commonly found is a pair of EL34s running
337:
around 375–450 V plate voltage and producing 50 watts output (if fixed bias is used), while a quad of EL34s running class AB1 in push–pull typically run anywhere from 425 to 500 V plate voltage and produces 100 watts output. This configuration is typically found in
328:, the EL34 has a heater voltage of 6.3 V. According to the data sheets found in old vacuum tube reference manuals, a pair of EL34s with 800 V plate voltage can produce 90 watts output in
308:
amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between heater and cathode and other parameters. The
American
463:
325:
695:
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404:
430:
TL25 (mono) and Stereo 60, and is also widely used in high-end guitar amplifiers because it is characterized by greater
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451:
383:
While the EL34 is no longer made by
Philips, it is currently manufactured by EkspoPUL in Saratov, Russia (
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690:
422:
The EL34 was widely used in higher-powered audio amplifiers of the 1960s and 1970s, such as the popular
396:
423:
546:
459:
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at former Foshan Nanhai
Guiguang Electron Tube Factory in southern China, (Psvane and TAD brands).
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base (indicated by the '3' in the part number) and is found mainly in the final output stages of
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59:
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55:
446:. The EL34 is found in many British guitar amps and is associated with the "British tone" (
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434:(considered desirable in this application) at lower power than other octal tubes such as
143:
684:
400:
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358:
274:
Tung-Sol 6CA7 (EL34 Substitute) Vacuum Tube Logic Book 2nd
Edition, 1994, page 151
462:) as compared to the 6L6 which is generally associated with the "American tone" (
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Some firms make a related tube called an E34L which is rated to require a higher
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voltage, but which may be interchangeable in some equipment.
357:, which delivers a similar range of power output, is a
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An E34L made by JJ Electronics c.2011, using blue glass
470:; the earlier classic Marshall "Plexi" amps used the
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376:Matched EL34 vacuum tubes by Russian manufacturer
676:Tube Data Archive, thousands of tube data sheets
474:, a beam tetrode similar to the 6L6, as well).
324:In common with all 'E' prefix tubes, using the
316:. The USSR analog was 6P27S (Cyrillic: 6П27C).
642:JJ Electronics EL34 and E34L data sheet (PDF)
8:
638:RCA, RCA Receiving Tube Manual RC26, 1968.
27:
292:type. The EL34 was introduced in 1955 by
614:"Changsha Hengyang Electronics Co., Ltd"
599:"Changsha Hengyang Electronics Co., Ltd"
584:"Changsha Hengyang Electronics Co., Ltd"
572:. p. 277–278. Retrieved 18 August 2022.
558:
18:
7:
635:Valvo Gmbh, Valvo Taschenbuch, 1958.
14:
353:The EL34 is a pentode, while the
326:Mullard–Philips tube designation
142:
567:Physical Society's Exhibition.
1:
596:Classic (Hi-Fi) Series EL34,
712:
696:Guitar amplification tubes
403:in Čadca, Slovakia and by
214:(Values are for two tubes)
74:4.44 in (113 mm)
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141:
26:
626:Technical specifications
312:number for this tube is
82:1.5 in (38 mm)
631:EL34 Philips Metal Base
380:
350:
310:RETMA tube designation
671:Reviews of EL34 tubes
581:Classic Series EL34C,
565:Editors (June 1955).
375:
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121:Max dissipation Watts
547:List of vacuum tubes
405:Hengyang Electronics
296:, who were owned by
160:Amplification factor
66:, (audio amplifiers)
33:An EL34 vacuum tube
16:Vacuum tube (valve)
666:Duncan's Amps TDSL
654:EL34 EI Yugoslavia
647:2007-03-07 at the
381:
351:
300:. The EL34 has an
210:class-AB amplifier
137:Socket connections
60:class-AB amplifier
397:Genalex Gold Lion
365:referred to as a
340:guitar amplifiers
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227:Anode resistance:
153:class-A amplifier
95:Indirectly heated
64:class-B amplifier
56:class-A amplifier
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424:Dynaco Stereo 70
385:Electro-Harmonix
284:is a thermionic
229:(anode to anode)
200:Anode resistance
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35:manufactured by
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649:Wayback Machine
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611:Sales Network,
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367:beam power tube
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660:External links
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570:Wireless World
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100:Heater voltage
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44:Classification
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488:Similar tubes
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401:JJ Electronic
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245:Anode current
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237:Anode voltage
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176:Anode current
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168:Anode voltage
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691:Vacuum tubes
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366:
359:beam tetrode
352:
323:
313:
281:
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261:Bias voltage
219:Power output
192:Bias voltage
92:Cathode type
478:Replacement
468:Mesa Boogie
418:Application
286:vacuum tube
129:Max voltage
685:Categories
553:References
432:distortion
269:References
232:3.4 k Ohms
212:operation
412:grid bias
399:brands),
335:push–pull
330:class AB1
248:2* 120 mA
155:operation
645:Archived
506:See also
452:Marshall
426:and the
389:Tung-Sol
378:Svetlana
208:Typical
203:2 k Ohms
151:Typical
79:Diameter
501:(6П27С)
393:Mullard
298:Philips
294:Mullard
290:pentode
195:−13.5 V
87:Cathode
52:Service
47:Pentode
37:Mullard
464:Fender
460:Orange
456:Hiwatt
361:which
179:100 mA
71:Height
499:6P27S
442:, or
306:audio
302:octal
264:−38 V
256:375 V
240:420 V
187:250 V
171:265 V
116:Anode
111:1.5 A
542:6550
537:KT88
532:KT66
527:5881
512:EL84
494:KT77
483:6CA7
472:KT66
444:6550
440:KT88
428:Leak
395:and
314:6CA7
282:EL34
280:The
222:55 W
22:EL34
522:6L6
517:6V6
448:Vox
436:6L6
363:RCA
355:6L6
132:800
103:6.3
687::
458:,
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450:,
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391:,
387:,
342:.
163:11
124:25
62:,
58:,
616:.
601:.
586:.
466:/
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