Best 5751 listed at:

5751 US Brands / Siemens
    
(click on links below to check stock) 5751 CBS 5751 GE 5751 Raytheon 5751 RCA 5751 Siemens 5751 Sylvania 5751 Tungsol
5751 CBS Gray Plates and triple mica 1960-1961 1 low noise Kuhl-Tube cryo tube $89) 5751 CBS Industrial NOS triple mica, large U getter halo, around 1960 (2.25/2.42ma) 1 low noise Kuhl-Tube cryo tube $79) 5751 CBS Industrial NOS triple mica, large U getter halo, around 1960 (2.15/2.47ma) 1 platinum low noise Kuhl-Tube cryo tube $99) 5751 CBS NOS triple mica, large U getter halo, 1961 white printing in white box (2.54/2.63ma) 1 low noise Kuhl-Tube cryo tube $99) 5751 CBS NOS triple mica, large U getter halo, 1961 white printing in white box (2.42/2.64ma) (same as in above picture) 1 low noise Kuhl-Tube cryo tube $99) 5751 CBS NOS triple mica, large U getter halo, 1961 white printing in white box (2.5/2.75ma)
5751 GE Black Plates and triple mica 1950's (very good midrange detail, good bass, sweet sound, one of the best sounding 5751's ever made) 1 platinum low noise Kuhl-Tube cryo $75) 5751 GE black plates triple mica "D" getter halo used/good 1950's no printing (2.4/2.45ma) (Gm=1340/1380) 1 platinum low noise tube $80) 5751 GE black plates triple mica "D" getter halo used/good 1950's no printing (2.6/2.7ma) (Gm=1420/1450) 1 Kuhl-Tube cryo low noise tube $129) JG-5751 GE black plates triple mica "U" getter halo NOS 1950's in white box (2.45/2.60ma) (Gm=1370/1450) #55 1 platinum slightly microphonic tube $89) JG-5751 GE black plates triple mica "U" getter halo NOS 1950's in white box (2.9/3.0ma) (Gm=1530/1555) (very good printing) 1 slightly microphonic tube $25) 5751 GE black plates triple mica no printing "U" getter 1950's slightly microphonic and mis-matched sections (2.3/3.0ma) (Gm=1335/1650) listed below - 1 tube 1 low noise tube $99) GL-5751 GE "5 Star" black plates triple mica "D" getter halo 1955 used/good (Gm=1365/1475) far left
Customer Comments: --------------------------- Thanks for the recommendation of the GE JG-5751WA's from 1958. Wow! I didn't think it was possible for a tube to be so revealing (detailed not the right word) and musical at the same time. They could not have been made by human hands! Thanks again for everything. Dennis"
5751 GE Gray Plates triple mica 1950's - 1963 Sweet, smooth, nice mids, quiet, musical. - Crate V30H - Conrad Johnson PV12A + Premier 11A, Premier 8 - Conrad Johnson MV75A1 1983 - Jolida 1301 hybrid amplifier - PEAVEY CLASSIC 30

5751 triple mica NOS 1950's: --------------------------- 1 platinum low noise tube $79) 5751 GE NOS triple mica, gray plates, copper grid posts, "U" getter halo 1950's (2.3/2.4ma) 1 low noise tube $95) JG-5751 GE NOS triple mica, gray plates, copper grid posts, "U" getter halo 1955 in military box (2.55/2.75ma) Gm=1400/1450 best single 5751 triple mica NOS 1960-1963: ------------------------------ 1 platinum low noise tube $85) JG-5751 GE gray plates NOS triple mica white printing 1962 original box (Gm=1400/1500) 1 low noise tube $70) 5751 GE "5 Star" NOS smeared red printing, gray plates, triple mica, copper grid posts, 1962-1963 (2.6/2.88ma) (Gm=1410/1475) 1 low noise pair $75) JLRV-5751 GE Canada NOS/75% "D" getter halo gray plates, triple mica, copper grid posts, 1962 1 tube) Gm=1305/1330 1 tube) Gm=1320/1355 5751 GE triple mica used/good, some like new 1955-1962: ------------------------------------------------------ 1 platinum low noise tube $50) JG-5751 GE triple mica "U" getter halo used/like new 1959-1960 - smeared printing (2.50/2.55ma) Gm=1430/1440 1 platinum low noise tube $50) 5751 GE used/tests like new triple mica, gray plates, copper grid posts, "U" getter halo 1950's (3.0/3.1ma) Gm=1525/1545 1 low noise tube $40) 5751 GE triple mica "U" getter halo used/like new 1959-1960 - no printing (2.54/2.72ma) Gm=1435/1500 1 low noise tube $50) 5751 GE used/tests like new, triple mica, gray plates, copper grid posts, "O" getter halo 1960 no printing (2.52/2.60ma) Gm=1405/1425 1 low noise tube $35) JG-5751 GE used/good triple mica, gray plates, copper grid posts, "O" getter halo 1960 (2.3/2.4ma) Gm=1340/1360 1 low noise tube $25) JG-5751 GE used/good triple mica, gray plates, copper grid posts, "O" getter halo 1960 (Gm=1260/1280) 1 low noise tube $35) 5751 GE branded Raytheon used/good, triple mica, gray plates, copper grid posts, "U" getter halo 1956 (Gm=1275/1295) 1 low noise tube $40) JG-5751WA GE used/good triple mica, gray plates, copper grid posts, "O" getter halo 1960-1962 (Gm=1490/1590) (2.9/3.4ma) 1 low noise tube $29) JLRV-5751 GE Canada used/75% "D" getter halo gray plates, triple mica, copper grid posts, 1962 1 tube) Gm=1290/1350 1 low noise pair $70) JG-5751 GE triple mica "O" getter halo used/good 1960-1961 - faded printing 1 tube) Gm=1310/1320 1 tube) Gm=1360/1370


5751 GE 1963-1970 (Double Mica) Smooth - warm - pleasent 5751 Hammond XK-3 combo organ McIntosh C2200 preamp 5751 double mica 1960's: ----------------------- 1 platinum low noise tube $60) JG-5751 GE gray plates NOS double mica red printing 1963 in GE box (2.58/2.72ma) Gm=1450/1500 (recommended) - good value 1 platinum low noise tube $55) 5751 GE "5 Star" NOS "O" getter early 1960's extra support rods between mica, in white box (Gm=1600/1610) (3.05/3.1ma) best single 1 platinum low noise tube $50) 5751 GE "5 Star" NOS "O" getter original box late 1960's (Gm=1590/1620) (3.0/3.15ma) 1 low noise tube $40) 5751 GE "5 Star" NOS "O" getter original box late 1960's (Gm=1370/1490) 1 platinum low noise tube $30) 5751 GE NOS double mica NOS 1960's (Gm=1500/1530) 1 platinum low noise tube $25) 5751 GE NOS double mica NOS 1960's (Gm=1390/1425) 1 platinum low noise tube $22) 5751 GE "5 Star" gray plates NOS 60% double mica 1970's original box, white printing (Gm=1260/1270) 5751 GE double mica used/good: ----------------------------- 1 low noise tube $49) JG-5751 GE used/tests like new 1963-1964 (2.45/2.65ma) (Gm=1420/1490) 1 platinum low noise tube $35) JG-5751 GE used/good 1963-1964 very good printing (2.33/2.37ma) (Gm=1320/1330)
5751 GE 1970's - 1980's 1 platinum pair $60) 5751 GE NOS 1970's rebranded "CK-5751 Raytheon" 1 tube) Gm=1540/1550 1 tube) Gm=1515/1555 3 Low Noise Pairs $50/pair) 5751 GE JAN gray plate double mica NOS 1980's SINGLE TUBES: ------------
5751 Raytheon 1950's - 1960's (Raytheon are high quality 5751) CK-5751W1 Raytheon bblack plate early 1960's - WINDMILL GETTER HALO sold out Customer Comments: ------------------------- "I do believe I'm in love. The Raytheon black plate 3 mice (1961) is truly wonderful. I do like it better even than a GE BP 3-mica (1957). clarity, dynamics, bass. yum. This is in a Mapletree headphone amp. - Robert"
5751 RCA Black Plates "triple mica" 1950's - 1960 5751 RCA black plate triple mica Cryo-Valve Low Noise 1950's in stock. - Mapletree Ear+ Purist HD - CJ 5751 RCA Black Plates with Triple Mica: ------------------------------------------------ 1 platinum low noise tube $175) 5751 RCA rebranded RAYTHEON black plates "triple mica" with "square" getter halo, copper grid posts (5730=1957) original box (Gm=1540/1590) 1 Kuhl-Tube cryo tube $175) JRC-5751WA RCA black plates "triple mica" with "square" getter halo, copper grid posts 1960 (2.4/2.5ma) (Gm=1500/1560) 1 platinum tube $95) 5751 RCA "triple mica" with "square" getter halo used/tests like new 1950's, copper grid posts, smeared white printing (2.44/2.53ma) (Gm=1540/1550) 1 low noise tube $80) 5751 RCA "triple mica" with "square" getter halo used/good 1954-1955, smeared white printing (2.95/3.1ma) (Gm=1560/1640) 1 low noise tube $50) JRC-5751 RCA "triple mica" with "square" getter halo used/good 1954 mis-matched triode sections (Gm=1240/1540) (good for guitar amp) (smeared white printing, JRC is readable on tube) listed below 1 slightly microphonic pair $129) 5751 RCA "triple mica" with "square" getter halo NOS 1960 same date codes original boxes 1 tube) Gm=1520/1525 1 tube) Gm=1505/1555 SLIGHTLY MICROPHONIC SINGLE TUBES: --------------------------------- 1 Kuhl-Tube cryo slightly microphonic $45) 5751 RCA "triple mica" with "square" getter halo red printing 1950's redated and reprinted in 1960's will work fine in many applications; CD players, buffers (2.72/2.85ma) 1 Kuhl-Tube cryo slightly microphonic $45) 5751 RCA "triple mica" with "square" getter halo red printing 1950's redated and reprinted in 1960's will work fine in many applications; CD players, buffers (2.71/2.76ma) 1 Kuhl-Tube cryo slightly microphonic $40) 5751 RCA "triple mica" with "square" getter halo red printing 1950's redated and reprinted in 1960's will work fine in many applications; CD players, buffers (2.47/2.5ma) 1 Kuhl-Tube cryo slightly microphonic $45) JRC-5751 RCA "triple mica" with "square" getter halo like new in white box 1954 (2.7/2.9ma)
5751 RCA Black Plates 1960's - 1970's (double mica) (RCA are very sweet sounding and a high quality 5751; low noise and good bass) - McIntosh C500T Tube Preamplifier - Aesthetix - VTL 7.5 preamp - Conrad Johnson - Fender Dual Showman 1972 - Jolida CD player PAIRS: ----- 0) SINGLE TUBES: ------------ 1 platinum low noise tube $75) JRC-5751W1 RCA NOS black plates, double mica, 1964, faded printing (Gm=1520/1550) 1 platinum low noise tube $70) JRC-5751W1 RCA NOS black plates, double mica, 1964, fair printing (Gm=1390/1450) 1 platinum low noise tube $80) 5751 RCA branded "FAA" = Federal Aviation Association NOS black plates, double mica 1963 (Gm=1590/1600) 1 low noise tube $80) JRC-5751 RCA NOS black plates, double mica 1962 (Gm=1465/1500) 1 platinum low noise tube $75) 5751 RCA used/tests like new 1961, red printing (2.62/2.78ma) (Gm=1490/1520) SINGLE TUBES: ------------ 1 tube $35) JRC-5751 used/like new 1960's smeared printing 1 tube $18) JRC-5751W1 used/60-65% 1960's smeared printing 1 pair $30) 5751 RCA used 60-65% 1960's smeared printing 1 tube $28) 1960's like new no printing 1 tube $13) used 1 section 55-60%, 1 section 90% 1963
5751 RCA Black Plates "Command Series" 1960's (double mica) Warm, rich, smooth, quiet. sold
5751 Siemens West Germany Siemens: very detailed, transparent top end, tight articulate bass, excellent in a phone stage, linestage
or input stage of amplifier replacing 12AX7.
5751 Siemens: 1960's, 1968, 1971 1 low noise tube $50) 5751 Siemens Halske triple mica NOS 1960's, triode sections mismatched by 30% (Gm=1450/1700)
5751 Sylvania Black Plates and Gray Plates 1950's - Genz Benz Streamliner 900 bass amp 2011-2012 - Mapletree Ear+ Purist HD - Jolida CD-100 sub for 12AX7's - JADIS Defy 7 amp - Jolida JD-9 phono preamp - Fender Champion 600 BLACK PLATES 1950's - 1960: -------------------------- PAIRS: ----- sold out SINGLE TUBES: ------------ sold 1 low noise tube $25) 5751 Sylvania black plates triple mica NOS "D" getter halo - mismatched sections good for guitar amp 1950's (2.1/2.8ma) (50%/90% sections)
5751 Sylvania Gray Plates 1960-1979 GRAY PLATES 1960 - 1979: ----------------------- NOS: --- 1 low noise tube $42) 5751WI Sylvania gray plates triple mica NOS/80% misbranded "12AX7WA Sylvania" NOS around 1960 (2.55/2.70ma) (good value) 1 low noise tube $30) 5751 Sylvania NOS double mica rebranded "CK-5751 Raytheon" 1970's USED SINGLE TUBES: ----------------- 1 tube $25) 5751 Sylvania triple mica gray plates "o" getter halo early 1960's used, small amount of green printing on glass (2.58/3.0ma) 1 tube $22) 5751 Sylvania triple mica gray plates LARGE "O" getter halo around 1960, very good yellow printing used (2.4/2.54ma) 1 tube $20) JAN-5751 Sylvania 1967 triple mica gray plates "o" getter halo used/50-60% (2.2/2.4ma) 1 tube $10) 5751 Sylvania triple mica gray plates "o" getter halo early 1960's used/50%, small amount of gold printing on glass
5751 Sylvania / Philips Gray Plates 1980-1987 Best 5751 Sylvania and Philips pairs listed at: 5751 Sylvania SINGLE TUBES: -------------------------- 1 low noise tube $25) JAN-5751 Sylvania NOS 1981 NOS 3.1/3.3ma (recommended)

1 platinum tube $20) 5751 Sylvania branded as Philips ECG JAN copper grid posts NOS 1983 (Gm=1550/1575) (3.1/3.2ma)

1 tube $10) 5751 Sylvania used/65% 1973 2.23/2.31ma


5751 Tungsol 1950's - 1960's Very good detail and upper midrange presence. - Dr. Z Maz Jr. amp - Fender Bassman 59 Reissue LTD Mod for Rock Harp Amp 5751 TUNGSOL 1950's: ------------------- 1 Low Noise tube $100) JTL-5751 Tungsol NOS large "U" getter halo 1950's in white box (2.9/3.08ma) (Gm=1570/1600) 1 Low Noise tube $90) JTL-5751 Tungsol NOS large "U" getter halo (5911=1959), smeared printing in white box (3.72/3.95ma) (Gm=1680/1695) 5751 TUNGSOL 1960's: ------------------- 1 low noise tube $85) JTL-5751 Tungsol NOS 1964 in TS box (2.35/2.53ma) (Gm=1475/1550) 1 low noise tube $85) JTL-5751 Tungsol NOS 1961 in white box (3.0/3.23ma) (Gm=1695/1715)