Western Electric Power Tubes listed at
Western Electric Preamp Tubes listed at
Western Electric Rectifier Tubes listed at

WESTERN ELECTRIC TUBES (click on links below to check stock) 400A / 400B / 401A 403A / 403B (sub for 6AK5) 404A=5847 407A / 407B (20V filament) 408A (20V filament) ($35/pair) 409A / 412A 413A / 413B / 415A 416B / 416C 417A=5842 418A / 420A=5755 421A / 422A 423A / 426A / 427A / 428C 429A / 430B / 430C / 431A / 432B / 435A / 436A 437A / 438A / 439A / 442A / 443A / 446A / 447A 448A / 448B 449A / 450A / 452A / 454A / 457A 705A 713A / 715A / 715B / 715C 717A 721A / 722A / 723A / 725A

(Western Electric Inventory last updated on April 16th, 2014)

There is no bigger name in the history of vacuum tubes than Western Electric. Western Electric engineered, designed, produced or experimented with over 785 different tubes from 1913 - 1988. Many of these tubes were superb sounding audio tubes that are still in very high demand today. These tubes include the 101D, 205D/E, 211D/E, 274A/B, 300A/B, 310A, 348A, 350B, 396A, 417A, 421A and 437A, just to name a few. Tube World stocks one of the most extensive inventories of WE tubes on the planet. Stock changes daily and prices continue to increase due to the scarcity of most WE tubes. A variety of cryogenically treated Western Electric tubes called are in stock; 396A, 412A, 403B, 408A


400A / 400B Pentagrid Converter (400A=1R5) 0) 400A WE NOS 0) 400B WE NOS
401A=5590 Pentode (401A=similar to 6AJ5) 15) 401A WE NOS 1950 - 1960's $25 ea or (6 for $125) 1) 401A WE used/like new 1951 $18
403A Pentode (403A=miniature pentode similar to 6AK5 and 5654, 6.3V filament) (403B uses less heater power and has a longer life than 403A) - Little Dot Mk3 - Grant Fidelity tube buffer - Grant Fidelity B283 - Darkvoice 332 - Yaqin CD 2 listed below 10) JW-6AK5 WE NOS 1950's D getter reboxed $25 ($55/pair) (10 for $225) 10) JW-6AK5 and 403A WE NOS 1950's - 1960's reboxed $25 ($55/pair) (10 for $225) 10) 6AK5 WE NOS 1950's - 1960's reboxed $20 ($45/pair) (10 for $180) 2 pairs $59/pair) JW-6AK5/403A WE NOS reboxed 1950's D getter (recommended) 1 platinum pair $55) 403A WE NOS original boxes (6026=1960) same date codes D getter (recommended) 1 tube) 43/22 1 tube) 42/22 1 platinum pair $45) 403A WE NOS original boxes D getter 1 tube) 38/22 (6026=1960) 1 tube) 38/22 (6039=1960) SINGLE TUBES: ------------ 10) JW-6AK5 WE used/good 1950's - 1960's reboxed $16 ea or (10 for $139) 10) JW-6AK5 and also branded 403A WE used/good reboxed $16 ea or (10 for $139) 10) 6AK5 WE used/good 1950's - 1960's reboxed $13 ea or (10 for $109) SPECIAL: (10 for $99) 403A/6AK5 WE used/test good - reboxed
403B=5591 Pentode (403B uses less heater power and has a longer life than 403A) - Little Dot Mk3 - Little Dot Mk4 SE - Grant Fidelity tube buffer - CAD Trion tube microphone - Miniwatt EL84 amp PAIRS: ----- listed below 1 pair $75) 5591=403B WE NOS D getter halo original boxes 1958 and 1959 (recommended) 1 tube) 1959 (40/22) 1 tube) 1958 (39/22) 1 pair $65) 403B WE NOS D getter 1957-1958 original boxes (best pair) 1 tube) 1957 (40/22) 1 tube) 1958 (40/22) 1 pair $65) 403B WE NOS D getter 1956 and 1960 (recommended) 1 tube) 1956 (42/22) white box 1 tube) 1960 (41/22) original box listed below 1 pair $62) 403B WE NOS D getter 1958-1959 original boxes (recommended) 1 tube) 1958 (40/22) 1 tube) 1959 (39/22) 4 pairs $60/pair) 403B WE NOS D getter 1960-1969 original boxes (2 pairs for $110) 10 pairs $55/matched pair) 403B WE NOS O getter 1970's original boxes (2 pairs for $100) SINGLE TUBES: ------------ 10 single tubes $27 each) 403B WE NOS 1960's - 1970's original boxes (10 NOS unmatched for $245) 1 tube $30) 5591=403B WE NOS (426=1954) reboxed (44/22) 6 pairs $79/pair) 403B WE NOS Kuhl-Tube cryo-treated 1950's - 1970's (best pairs) 5) 403B WE used/good $10 ea (4 for $35) 2 pairs $28/pair) 5591=403B LM Ericsson Sweden "D" getter used/test like new 1950's
404A=5847 / F-55789 Pentode F-55789=404A 404A WE "D" getter used/test like new: ------------------------------------- 1 tube $40) 404A WE 1963 (50/30) 1 tube $40) 404A WE 1963 (50/30) 1 tube $40) 404A WE 1963 (49/30) 1 tube $40) 404A WE 1962 (49/30) 1 tube $40) 404A WE 1965 (48/30) 1 tube $40) 404A WE 1963 (47/30) 1 tube $40) 404A WE 1962 (48/30) 1 tube $40) 404A WE 1963 (49/30) 1 tube $40) 404A WE 1970 (47/30) 1 tube $37) 5847=404A WE 1951 (44/30) 1 tube $35) 404A WE 1967 (42/30) 1 tube $35) 404A WE 1967 (44/30) 1 tube $35) 404A WE 1964 (41/30) 1 tube $35) 404A WE 1963 (41/30) 1 tube $38) 404A WE 1968 (45/30) 1 tube $38) 404A WE 1963 (45/30) 1 tube $35) 404A WE 1963 (42/30) 1 tube $35) 404A WE 1963 (42/30) 1 tube $35) 404A WE 1964 (42/30) 1 tube $35) 404A WE 1967 (43/30) 1 tube $32) 404A WE 1964 faded getter (42/30) 1 tube $32) 404A WE 1970 faded getter (43/30) 1 tube $32) 404A WE 1965 faded getter (44/30) 1 tube $32) 404A WE 1965 faded getter (45/30) 1 tube $30) 404A WE 1965 faded getter (40/30) 1 tube $28) 404A WE 1963 faded getter (40/30) 1 tube $30) 404A WE 1967 (40/30) 1 tube $30) 404A WE 1966 (40/30) 1 tube $30) 404A WE 1963 (40/30) 1 tube $30) 404A WE 1969 (40/30) 1 tube $28) 404A WE 1969 (39/30) 1 tube $28) 404A WE 1970 (39/30) 1 tube $28) 404A WE 1967 (38/30) 1 tube $28) 404A WE 1972 (38/30) 1 tube $28) 404A WE 1958 (38/30) 404A WE "D" getter used/good: ---------------------------- 1 tube $22) 404A WE 1968 (34/30) 1 tube $25) 404A WE 1963 (36/30) 1 tube $25) 404A WE 1965 (36/30) 1 tube $20) 404A WE 1971 faded getter (34/30) 5847 Amperex and LM Ericsson: ---------------------------- 1 tube $45) 5847=404A LM Ericsson Sweden Gold Pins NOS (46/30) 12) 5847=404A Amperex JAN Gold Pins used/test good $12 ea or (10 for $105)
407A Dual Triode / 407B Dual Triode (407A=396A with a 20V filament) (407B=premium grade 407A with higher Gm and higher plate current specs, 20V Filament) 407A NOS: -------- 0) 407A USED: --------- 10) 407A WE used/test like new 1960's - 1980 $15 (10 for $140) 10) 407A WE used/test good 1960's - 1980 $8 (10 for $69) 407B: ---- 0) 407B WE NOS 15) 407B WE used/good 1960's - 1970's $10 (10 for $85) SYLVANIA: -------- sold out) GB-407A Sylvania Gold Brand NOS "nickel pins" not gold-plated 1970's
408A Pentode (408A=6AK5 with 20V heater; sharp-cutoff pentode) - Yamamoto HA-02 Headphone Amp - Little Dot Hybrid I+ KUHL-TUBE CRYO-TREATED 408A NOS: ------------------------------- 3 Kuhl-Tube Pairs $45/pair) 408A Western Electric NOS original boxes cryo-treated for 36 hrs 1969-1974 (2 pairs for $80) 3 Kuhl-Tube Pairs $45/pair) NE-408A Northern Electric Canada NOS original boxes 1974 same date codes cryo-treated for 36 hrs (see above picture) (2 pairs for $80) 408A NOS original boxes not cryo-treated: (buy 2 pairs for $69) ---------------------------------------- 1 platinum pair $35) 408A WE NOS D getter (P1) 1 tube) 1967 (40/22) 1 tube) 1968 (40/22) 1 platinum pair $35) 408A WE NOS D getter (P2) 1 tube) 1965 (43/22) 1 tube) 1967 (43/22) 1 platinum pair $35) 408A WE NOS D getter same date codes (P3) 1 tube) 1971 (42/22) 1 tube) 1971 (43/22) 1 platinum pair $35) 408A WE NOS D getter (P4) 1 tube) 1968 (44/22) 1 tube) 1970 (43/22) 1 platinum pair $35) 408A WE NOS D getter same date codes (P5) 1 tube) 1967 (41/22) 1 tube) 1967 (41/22) 1 platinum pair $35) 408A WE NOS D getter 1962 (P6) 1 tube) 1962 (42/22) 1 tube) 1962 (40/22) 1 platinum pair $35) 408A WE NOS D getter (6552=1965) same date codes, in white boxes 1 tube) 1965 (42/22) 1 tube) 1965 (42/22) 1 platinum pair $35) 408A WE NOS D getter - best pair 1 tube) 1961 (40/22) 1 tube) 1963 (40/22) 6 pairs $30/pair) 408A WE NOS O getter halo 1971-1976 original boxes (2 pairs for $55) 3 pairs $30/pair) NE-408A Northern Electric Canada NOS 1973-1974 original boxes (recommended) (quality as good or better than Western Electric) (2 pairs for $55) SINGLE TUBES: ------------ 2 single tubes $12 each) 408A WE NOS 1960 - 1970's original boxes 2 single tubes $12 each) NE-408A Northern Electric Canada NOS 1973-1974 original boxes 408A Western Electric used/good: ------------------------------- 3 pairs $20/pair) 408A WE low hours/test like new 1960's - 1970's (best value) 10 pairs $15/pair) 408A WE used/good 1960's - 1970's (best value) (4 pairs for $53) 408A LM Ericcson Sweden: ----------------------- 1 pair $40) 408A=6028 LM Ericsson Sweden NOS large "D" getter halo original boxes 1950's (recommended) 1 tube) 40/22 1 tube) 41/22 1 tube $20) 408A=6028 LM Ericsson Sweden NOS large "D" getter halo original box 1950's (48/22) 1 tube $15) 408A=6028 LM Ericsson Sweden used/tests like new large "D" getter halo 1950's (46/22) 1 pair $25) 408A=6028 LM Ericsson Sweden used/good large "D" getter halo 1950's (36/22 and 36/22) 408A GE USA: ----------- 1 tube $8) 408A GE NOS 1960's (42/22) 1 tube $8) 408A GE NOS 1960's (38/22) GB-408A Sylvania 1960's: ----------------------- 1 tube $20) GB-408A Lenkurt by Sylvania black plate gold pins tests like new (48/22)
409A=6AS6 Pentode 9) 409A=6AS6 WE NOS $15 (4 for $55)
412A Full-Wave Rectifier / 6754 Bendix is a substitute (Filament=6.3V @ 1A, PIV=1250V, DC max ouput current = 100ma) - Shindoh 300B Click here to see 412A Western Electric and 6754=412A Bendix TO BUY 412A Western Electric

413A / 413B Relay Tube (max peak cathode current=200ma, average 70ma, anode breakdown voltage forward and reverse=200V, anode voltage drop=62V, deionization time=2ms) (bulb contains 80% neon, 20% argon, and small amounts of krypton 85) 6) 413A WE NOS original boxes 1956 $23 ea 4) 413B WE NOS original boxes 1962 $25 ea
415A Pentode (415A=miniature pentode similar to 6AS6, 415A=409A with filament lowered to 150ma) 0) 415A WE NOS
416B=6280 / 416C Disc-Seal Planar Triode (416B; Vp=200V, Ip=30ma, gain=3db / 416C; Vp=250V, Ip=45ma, gain=5db) (416C=416B with higher B+ voltage) 416B WE (Vplate=230V, Vgrid=0V and Vgrid=-1V, Iplate @ 0Vgrid bias and Iplate @ -1Vgrid bias is listed in tube listing) 416B: ---- sold out (Vplate=230V, Vgrid=0V and Vgrid=-1V, Iplate @ 0Vgrid bias and Iplate @ -1Vgrid bias is listed in tube listing) 0 tube $0) 6280=416B WE NOS 1960's (31ma, 10ma) 0 tube $0) 416B WE used/like new 1964 (27ma, 7ma) 416C: ---- 0 tube $0) 416C WE like new in white box 1969 (47ma, 14ma) 0 tube $0) 416C WE like new in white box 1969 (36.3ma, 8.5ma) 0 tube $0) 416B WE used/like new 1969 (31ma, 7.2ma)
417A=5842 / F-55788 / F-52984 Triode 1940's (5842=417A, F-55788=417A, the 417A WE sounds many times better than the 5842 Raytheon, the 5842 Amperex with Gold pins is a good substiture, Chinese version is 6C16) (Specs: Gm=24,000, Rp=1800 ohms, mu=43, Vfil=6.3, Ifil=295ma, Iplate=24ma, Vplate=150) (high transconductance, low noise) ALSO SEE "5842" LISTING: 5842 Amperex, Tungsol, Raytheon (F-52984=417A) - LAMM LP2 phono - Wavelength Signature 45 2004 - Robert Koda Takumi K-70 power amp - Psvane T-417 Reference Tube Pre-Amplifier - Supratek phono TO BUY 417A Western Electric

417A=5842 / F-55788 Triode 1960 - 1972 "D" getter halo TO BUY 417A Western Electric

417A=5842 Triode 1970-1980's "O" getter halo - Psvane T-417 Reference Tube Pre-Amplifier TO BUY 417A Western Electric

418A Power Tetrode (superb sound triode-connected) - Hovland sold out
420A=5755 Dual-Triode (phono preamp) TO BUY 420A=5755 Western Electric

421A=5998 Dual Triode (421A=5998 and has slightly higher amplification factor than 6AS7G) (5998 Tungsol is the next best to the Western Electric 421A, also 7236 Cetron) (all 421A have spiral wound (pigtail) filament wires) - Fi 421A amp - Singlepower Extreme - Peter Millett - Alex Ederer SET 5998/421A WE gray plate 1955, 421A WE black plate 1960's sold out
422A Full-Wave Rectifier (422A=5U4GB)(Filament=5V @ 3A, PIV=1800V, Iplate=400ma max) sold out Customer Comments: ----------------- "A platinum pair of WE422A arrived safely. I found them to be great rectifier! WE422A makes everything accurate. Especially in lower mid and bass, 422A is superior to 274B. Additionally, 422A is very quiet, so silence among music became beautiful. Of course, the Tung-sol VT-231's from Tube World work very well together. I could not brush my SV300BTE up without your nice business. Thank you very much."
423C / 426A
60) 423C WE NOS 1970-1981 $10 (voltage reference, 10 for $89) 3) 423C WE used $6 4) 426A WE NOS $20 (4 for $70)
427A / 428C Klystron
42) 427A WE NOS $10 (10 for $89) 0) 428C WE NOS $10
429A Beam Pentode
0) 429A WE used/good 1965 0) 429A WE used/good 1961 0) 429A WE used/good 1959
430B/C 50) 430B WE NOS $15 (10 for $129) (50 for $450 NOS as-is) 8) 430C WE NOS $16 (4 for $55)
431A 0)
432B 4) 432B WE NOS 1950's $22 (4 for $80) (Improved 432A, voltage reference tube)
435A Tetrode 0)
436A Power Tetrode 0)
437A Triode (an outstanding low-noise triode designed in the 1950's for critical telecommunication applications and used as the input tube in the Wavac HE-805 Triode Amplifiers) (Mu=41, Gm=46,000) - Russian 6S45P-E = 6C45P = 9pin version of WE437 - WAVAC amp - Thomas Mayer Phono-Vorverstarker 0)
438A 0)
439A (ten-stage cold-cathode gas-discharge stepping tube) 439A WE NOS 1959 $100 each or 4 for $360 (2) in original boxes (3) in white boxes
442A / 443A / 446A / 447A 0) 442A WE NOS
7) 443A WE NOS $20 (Cold Cathode Triode) (4 for $72) 100) 443A WE used/good $10 (10 for $85) 6) 446A WE NOS 1959-1969 $15 (miniature voltage regulator, 108V variant of 427A) 3) 447A WE NOS $20 (Cold Cathode Indicator Diode)
448A / 448B Tetrode (high transconductance, Gm=30,000) What the reader needs to understand is the Western Electric engineering department designed a piece of equipment. The specs for the components were sent to the plant to be made up. If a capacitor was needed say with a value of .391 MFD that’s what the plant made. This was the same for tubes, the tube were designed for a new piece of equipment not the other way around. Granted most tubes have multiple uses, but they all started as custom tubes. In the days before satellites, all network video was transported buy bell microwave radio across the entire country. All of the ABC, CBS, and NBC video was transported buy the phone company. Due to the nature of microwave radio the longest normal hop distance to the next repeater station was about 30 miles. The route is never in a straight line. So a trip from New York to LA will have upwards of 150 repeater stations. So you take your base band video signal, base band being from almost DC to 10Mhz. The requirement was sent to the plant to produce the required tube. With typical operating conditions being, Plate voltage of +130DC Plate current of 25Ma, Plate resistance of 33K. power output 3.3 watts, bandwidth from 20Hz to 10Mhz. Distortion of less then 1%, And noise of less then –45DB. The western plant came up with the perfect tube. The western electric 448A, this is one of the rarest tubes western ever made. They were used in only one radio system. If you ever find any, scoop them up, try them in your next amp. They make the 417A pale in comparison. (NOTE: The 448A IS NOT! a sub for the 417A) George Brkich AT&T (from audiokarma.org) (buy 2 pairs receive 5% discount, buy 4 pairs receive 10% discount) 448A PAIRS: (like new is 40-50/20 on TV-7, strong used is 35-39/20) ---------- 1 pair $199) 448A WE "tipped top" used/tests like new D getter halo 1965 reboxed 1 tube) 53/20 1 tube) 51/20 1 pair $199) 448A WE "tipped top" used/tests like new D getter halo 1965-1966 reboxed 1 tube) 52/20 1966 1 tube) 50/20 1965 1 pair $199) 448A WE "tipped top" used/tests like new D getter halo (6552=1965) reboxed, same date codes 1 tube) 50/20 1 tube) 49/20 1 pair $199) 448A WE "tipped top" used/tests like new D getter halo 1965-1966 reboxed 1 tube) 48/20 1965 1 tube) 47/20 1966 1 pair $199) 448A WE "tipped top" used/tests like new D getter halo (6552=1965) reboxed, same date codes 1 tube) 47/20 1 tube) 47/20 1 pair $195) 448A WE "tipped top" used/tests like new D getter halo (6552=1965) reboxed, same date codes 1 tube) 46/20 1 tube) 46/20 1 pair $195) 448A WE "tipped top" used/tests like new D getter halo 1965 reboxed 1 tube) 46/20 (6526=1965) 1 tube) 46/20 (6552=1965) 1 pair $179) 448A WE "tipped top" used/tests like new D getter halo 1965 reboxed 1 tube) 42/20 1 tube) 43/20 1 pair $175) 448A WE "tipped top" used/tests like new D getter halo 1965 reboxed 1 tube) 41/20 1 tube) 40/20 1 pair $145) 448A WE "tipped top" used/good D getter halo 1960's reboxed 1 tube) 38/20 1 tube) 39/20 1 pair $129) 448A WE "tipped top" used/good/75%+ D getter halo 1960's reboxed 1 tube) 36/20 1 tube) 37/20 1 pair $175) 448A WE "smooth top" with "D" getter halo used/tests like new reboxed (best pair) 1 tube) 47/20 (6626=1966) 1 tube) 47/20 (6652=1966) 1 pair $140) 448A WE "smooth top" with "D" getter halo used/test like new/85%+ 1963-1970 reboxed 1 pair $140) 448A WE "smooth top" with "D" getter halo used/test like new/85%+ 1963-1970 reboxed 1 pair $115) 448A WE "smooth top" with "D" getter used/good/75%+ reboxed 1970 reboxed 1 tube) 36/20 1970 1 tube) 36/20 1970 1 pair $115) 448A WE "smooth top" with "D" getter used/good/75%+ reboxed 1 tube) 36/20 1964 1 tube) 36/20 1966 1 pair $125) 448A WE "smooth top" with "O" getter halo used/test like new/85%+ 1971 reboxed 1 tube) 41/20 1 tube) 40/20 1 pair $125) 448A WE "smooth top" with "O" getter halo used/test like new/85%+ 1971-1972 reboxed 1 tube) 41/20 1 tube) 42/20 1 pair $99) 448A WE "smooth top" with "O" getter used/good/75%+ reboxed 1968-1976 reboxed 1 pair $99) 448A WE "smooth top" with "O" getter used/good/75%+ reboxed 1968-1976 reboxed * SPECIAL: 448A WE "SMOOTH TOP" used/good/75% with "O" getter (10 for $325) 1968 - 1976 * SPECIAL: 448A WE "SMOOTH TOP" used/test like new/85-95% with "O" getter (10 for $450) 1968-1976 * SPECIAL: 448A WE "SMOOTH TOP" used/good/75% with "D" getter (10 for $350) 1960's - 1972 * SPECIAL: 448A WE "SMOOTH TOP" used/test like new/85-95% with "D" getter (10 for $479) 1960's - 1972 * SPECIAL: 448A WE "TIPPED TOP" used/good/75% with "D" getter (10 for $399) 1950's - 1968 448B: ---- 448B (inside of glass bulb is coated with AQUADAG to suppress fluorescence) 1) 448B WE coated glass and smooth top NOS original box 1964 $200 (51/20) 1) 448B WE coated glass and smooth top used/tests like new 1967 $125 (51/20) 1) 448B WE coated glass used/tests like new "tipped top" 1966 reboxed $125 2) 448B WE coated glass used/good, smooth top $99 ea
449A / 450A / 452A / 454A / 457A Reflex Klystron 0) 449A/449B WE 0) 450A WE 0) 452A WE NOS 0) 454A WE NOS 1) 457A WE used $50
705A Half-Wave Rectifier listed below 1 tube $35) JAN-CW-705A WE NOS original box 1944 listed below 1 tube $30) JAN-CW-705A WE NOS 1940's in white box listed below 4 tubes $35/ea) 705A WE NOS original boxes 1940's (4 for $130) 1 tube $25) JAN-CRP-705A Raytheon like new 1940's 1 tube $30) 705A WE NOS 1940's in white box (on right) 1 tube $28) 705A WE NOS 1940's enamel printing flkaed off glass in white box (on left) 1 tube $25) 705A WE used/like new 1940's
713A Pentode=717A with black bakelite base (Pentode, 713A=717A with black bakelite base) most made by Tungsol branded Tungsol or Western Electric by Tungsol - Yamamoto AO8 amp 713A Tungsol listed below 1 platinum pair within .1ma $55) CTL-713A WE by Tungsol NOS 1942 (Vplate=100V, Vscreen=100V, Vgrid=-1V) 1 tube) 7.77ma 1 tube) 7.68ma 1 platinum pair within .2ma $55) 713A WE by Tungsol NOS 1942 (Vplate=100V, Vscreen=100V, Vgrid=-1V) 1 tube) 9.0ma 1 tube) 8.8ma 1 Pair $45) WE-713A WE by Tungsol NOS 1940's branded "WE 713A" on base and printing on top of glass 1 tube) 9.8ma 1 tube) 8.9ma 1 platinum pair $55) 713A WE by Tungsol NOS 1942, printing on top of glass (6.3ma, 6.3ma) 1 platinum pair $55) 713A WE by Tungsol NOS 1942, printing on top of glass (6.2ma, 6.3ma)
715A / 715B / 716C Tetrode Radar Modulator (715A original version, 27V @ 2.15A Filament, 14KV, 10A peak, 60 watts (715B improved version, has bigger heat radiating fins on grid rods, 26.5V @ 2.1A Filament uprated to 15KV and 15A, 715C is improved over 715B and is similar to 5D21) 1) 715A WE used/like new $50 2) 715B Raytheon JAN used/good $28 2) 716C Raytheon JAN NOS original boxes $60
717A=VT-269 Pentode 1940's (Filament=6.3V @ 175ma, Gm=4000, derives from 384A, led to 6AK5) (ALL 717A were made by Tungsol or Raytheon for Western Electric) - Yamamoto A08 amp 717A Tungsol / 717A Raytheon 1940's (some of the 717A pairs could have oxidation on the metal bases and the pins, if the oxidation is on the pins they will be cleaned) ALSO SEE 713A - bakelite base version of 717A Best 717A listed at6BL7 STOCK
721A / 722A Mercury Vapor Thyratron (722A is similar to 287A: 722A=3V Filament @ 8A, rated at 2500Vplate, 287A=2.5V Filament @ 7A, rated at 2500Vplate, 640ma Iplate max) 1 tube $49) 721A WE NOS 1 tube $95) 722A WE "Balloon and Engraved Base" NOS in white box $95 (very small 1/8" glass piece inside bottom of tube, tube works fine)
723A Reflex Klystron 0) 723A WE
725A Magnetron The 725A is fixed at 9375MHz +/-30MHz. 6.3V/1A heater, 16kV/16A, 60kW pulse output. Used in various radar sets. In AN/APS-4 it was fed by two 1B22 spark-gap switches in series. (buy all 4 listed below receive 10% discount, sold as-is) listed below 1) JAN-725A WE $39 1) 725A WE $39 listed below 1) JAN-725A WE $39 1) JAN-725A Raytheon $39
for 2A - 104D Western Electric stock

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