HAL-O III Rectifier & Power Tube Stabilizer

HAL-O III-9 Stabilizers, Amperex 6922 PQ (White Label)

HAL-O III brings out the best potential in audio rectifier and power tubes and other sensitive tubes. HAL‑O III subdues heater-generated vibrations and common microphonics, allowing a truer rectified current and truer musical signal. Tube output will be a little cleaner sounding, a little more musical, energetic and less vague, while maintaining your system's unique nature and character.

With spring-tempered titanium C-ring and annealed titanium isolation pads, HAL‑O III is appropriate for all vacuum tubes, ideal for extremely hot-running tubes, able to handle continuous tube heat in excess of 1000° F (538° C).

Reviews

HAL-O III-7

For 7-pin miniature tubes and all tubes approximately 5/8" to 3/4" diameter (16mm to 19mm), including 0A2, 0B2, 1S5, 12AE6, 12FK6, 12FM6, 12X4, 304B, 3A5, 3S4, 403A/B, 408A, 5591, 5651, 5654, 5654SQ/W, 6005, 6186, 6AK5, 6AK5W, 6AN4, 6AQ6, 6AU6, 6BH6, 6C4, 6ER5, 6FG5, 6FQ5A, 6FS5, 6FY5, 6GK5, 6J1, 6J1P, 6J1P-EV, 6J6, 6N4, 6P17, 6X4, 6Z4, 7543, 9001, DCC90, DL92, EC90, EF95, M8100, OA2, OB2, SBA6. (Most 7-pin miniature tubes, at about 19mm diameter [3/4"], can also use UltraSonic 9.)

HAL-O III-7: $45.66 ea.

HAL-O III-9

HAL-O III-9 Stabilizer w/Siemens CCA tube Fits miniature 9-pin tubes and all tubes 3/4" to 7/8" diameter (19mm to 22mm), including 10GV8, 12AT7/ECC81, 12AU7/ECC82, 12AX7/ECC83, 12AY7, 12AZ7, 12B4, 12BH7, 12BY7, 12BZ7, 12DW7, 12FQ7, 2C51/396, 396A, 417, 5670, 5687, 5751, 5814, 5842, 5879, 5963, 5965, 6072, 6189, 6201, 6267, 6350, 6385, 6414, 6519P, 6688, 6829, 6840, 6900, 6922, 6955, 6973, 6AN8, 6BL8, 6BM8/ECL82, 6BQ5/EL84, 6BQ7, 6BZ7, 6BW4, 6C19P, 6CA4, 6C45, 6CG7, 6CS7, 6DE7, 6DJ8/ECC88, 6E5P/6E5PI, 6EJ7, 6EU7, 6FQ7, 6GC7, 6GH8(A), 6GW8, 6H23N, 6H30, 6GU7, 6N1P, 6N30, 6N30P, 6N3P, 6N6(P), 6P1, 6P1P, 6P1P-EV/6II1II-EB, 6S19P, 6U8(A), 6V4, 7025, 7044, 7058, 7062, 7119/E182CC, 7189, 7199, 7308, 7788, 7AU7, 7DJ8, 8416, CCa, D3a, E288CC, E80CC, E80F, E88CC, EC86, ECC189, ECC803/S, ECC81, ECC82, ECC83, ECC85, ECC86, ECC99, ECF80, ECL86, EF184, EF86, EL84, EL86, EM84, EZ80, EZ81, PCC88, PCL82, PCL86, SV83, (T-6 1/2 bulb).
HAL-O III-9: $45.69 ea.
4 or more: $44.95 ea.

HAL-O III-25

Fits all tubes approximately 1" to 1-1/16" diameter (23mm to 28mm), including metal 12SC7, metal 12SJ7, 5693, "slim" 5Z4, "slim" 6AU4, metal shell 6F6, 6J5, 6R7, metal 6SJ7, "slim" 6SN7, metal 6V6, 6X5.*

HAL-O III-25: $46.15 ea.

HAL-O III-30

Fits narrow, straight-sided octal tubes and all tubes approximately 1-1/8" to 1-1/4" diameter (28mm to 32mm), including 0A3A (straight-sided), 1266, 12AX3, 12J5/GT, glass 12SJ7, 12SJ7GT, 12SL7/GT, 12SN7/GT, 3CM, 5691, 5692, 5852, "slim" 5AR4 (G.E., Sovtek/Reflektor, T-9 bulb), 5Y3, 5Y3GA, 5Y3GT, "wide" 5Z4, 6106, 6AH4, 6AU4GT, 6AU4GTA, 6AU5, 6BL7, 6C5S, 6CJ3, 6D22S, 6DN7, 6EA7, 6EM6, 6EM7, 6EW7, straight-sided 6F6G, 6FD7, 6FY7, 6H4GT, 6J8P, 6K11, "slim" 6L6, 6N8P, 6N9P, 6R7GT (glass T-9 bulb), 6SF5-GT (glass tube), 6SH7, glass 6SJ7, 6SJ7GT, 6SL7, 6SN7, 6SN7GT-series (6SN7GT, 6SN7GTA, 6SN7GTB, 6SN7WGT, 6SN7WGTA), 6V6, 6V6GT (GE, Sylvania, Tung-Sol), 6V6S, 6X5G/GT/WGT, 6Y6, 7355, 7591, 7868, C3G, C3M, EC8020, "narrow" EL34 (E-H, SED "Winged C," Siemens, Svetlana, Telefunken, NOS Tesla, Tung-Sol), EL34B (Tung-Sol), GZ30, MT8 bulb, OA3A (straight-sided), PL504, VT-231.*

HAL-O III-35

Fits standard, straight-sided octals and all tubes approximately 1-5/16" to 1-7/16" diameter (33mm to 36mm), including 5AR4 (Amperex, G.E., Japanese "Mullard" copy, Mullard, JJ, Shuguang), "slim" 6CA7, 6H6, standard 6L6/5881, 6L6B, 6L6WGB, 6SF5 (metal shell), 6V6GT (RCA), E34LS, ECC33, medium-diameter EL34 (Amperex, Philips, JJ, Mullard, Valvo), EL34B (Shuguang), GZ34 (GE, JJ, Mullard, Philips, Raytheon, RCA), KT77.*

HAL-O III-35: $46.74 ea.

HAL-O III-40

Fits wide and bottle-shaped octals and all tubes approximately 1-1/2" to 1-5/8" diameter (37mm to 44mm), including 0A3 (bulb-shape), 0C3, 0D3, 1626, 19, 27, 30, 37, 520B (near bottom of tube), 5881, "fat-bottle" 5AR4 (Amperex, Mullard, T-11 bulb), 5AW4, straight-sided 5R4-types, straight-sided 5U4 and 5U4-GB (T-12 bulb), 5V3, 5V4, 5Y3GB, 5Y4GA, 5Z4G, 5Z4P, 6080, "slim" 6550, straight-sided 6AS7, 6BY5/G/GA (straight-sided), 6C6, "Big Bottle" 6CA7 (E-H), "Black Bottle" 6CA7-Z, 6F8G, 6HB5, bottle-shape 6J5 (ST-12 bulb), 6JN6, 6L6GC, (Mazda, JJ, GE, RCA, Sylvania, Tungsol), 6L6WGC, 6LF6, 6P3P, Sophia Electric "bottle" 6SL7 and 6SN7, 7027/A, 7236, 76, 84, 8417, 85, CV3798, "Fat Bottle" EL34 (Big Bottle), EL509, G75/2D, straight-sided GZ32, "slim bottle" GZ37, KT90, OA3 (bulb-shape), OC3, OD3, PL509, QS150/40, QS75/40, VR105, VR75/40.*

HAL-O III-40: $46.98 ea.

HAL-O III-50

HAL-O III-50 Stabilizer

For all tubes approximately 1-3/4" to 2-1/8" diameter (45mm to 54mm), including 10Y, 101F, 1610, 2A3 (RCA, Sovtek, Sylvania, Tung-Sol, Brimar), 26, 274B (Western Electric), 307A, 35, 350B, 3A/110A, 3A/110B, 3D21A, 45 (RCA, Sylvania, TJ, Tung-Sol), 572-10, 5998, bulb-shaped 5R4-types, 5R4WGA/B (Tung-Sol), bottle-shape 5U4G, 5V4, 5Y3G (Sylvania), 5Z3, 5Z3P/A, 5Z4G (Brimar), standard and wide 6550 (E-H, GE, Philips, RCA, SED, Svetlana, Sylvania, Tung Sol), 6550A, 6550C, bulb-shape 6AS7, 6B4, 6B4G, 6BY5/G/GA (bottle-shape), 6CA7-Z, 6C33C (upper portion of tube), bulb-shape 6F6G, 6H13, 6H13C, bulb-shape 6L6G, 6N13P, 71A, 80, 801/801A, 807, straight-sided 811, 814, C327 ("bulb" 27), CX4, bottle-shaped octals like AZ4, CV181/ECC32, CV181-Z (Shuguang), CV378 (Mullard), EL37, bottle-shaped GZ32 (Mullard), GZ33, KT120, KT66, KT88 (E-H, EAT, GEC, Gold Lion/Genalex, JJ/Tesla, SED, Shuguang, Sovtek, Svetlana), PX4, ST-14 bulb, ST-16 bulb, U52.*

HAL-O III-50: $47.29 ea.

4 or more: $46.49 ea.

HAL-O III-55

For jumbo-size tubes 2-3/16" to 2-5/16" diameter (55mm to 59mm), including 101D/101F, narrow 211 (RCA), 211/VT-4C, 2A3 (EML), 2A3-Mesh (EML), 274A, 300B "Balloon" (KR), Svetlana 300B, 45 (EML), large bottle 5Y3GB (smaller Mazda uses UltraSonic 40), "narrow" 805 (RCA, United), 829B, 841, 842, narrow 845 (Amperex, RCA), 845A (Shuguang), 872, "Big Bottle" GZ37, SV811-10, ST-17 bulb, T-18 bulb.*

HAL-O III-55: $48.89 ea.

HAL-O III-65

HAL-O III-65 with Electro Harmonix 300B

With plenty of flex to accomodate a wide range of tube diameters, fits giant tubes from 2-3/8" to 3" diameter (60mm to 76mm), including 101J, 102B, wide 211 (Sophia, TJ), 274B (EML, Shuguang, Sophia, Valve Art), 2A3-40W (JJ), 2A3 Meshplate (Sophia, TJ), 2A3 Globe Meshplate (Sophia, TJ), 2A3C (Shuguang), 300B (AVVT, E-H, EML, JJ/Tesla, Sovtek, KR, TJ/Full Music, Western Electric), 300B-XLS (EML, KR), Meshplate 300B (EML, Golden Dragon, TJ, Sophia, Shuguang, Valve Art), 300B Globe Meshplate (Sophia, TJ), 32B, Globe 45 (TJ), EML 45-mesh, 50, 520B, EML 5U4G-Mesh & 5Z3-Mesh, 6C33C (wide portion of tube), 803, "wide" 805 (Amperex, Shuguang, TJ), 811A, 813, wide 845 (Sophia, Shuguang metal plate, TJ), 845B (Shuguang), F2A, GM70, PX25, ST-18 bulb, ST-19 bulb, T-20 bulb.*

HAL-O III-65: $49.85 ea.

HAL-O III-100

With extra-heavy-gauge stainless steel C-ring and four titanium isolation pads, UltraSonic 100 thoroughly tames microphonics in super-giant tubes 3-1/2" to 4-5/8" diameter (89mm to 118mm), including 833, KR T-1610 (Kronzilla), and tubes using T-36 bulb.

HAL-O III-100: $49.95 ea.

*

Tube diameters and shapes sometimes vary. To estimate your tube diameter, just place a wooden or metal ruler against the side of your tube and "eyeball" the size – if you align your sight in a straight line to one edge of the tube and then in a straight line to the opposite edge, the measured difference in-between will be very close to the tube's actual diameter. Or measure the circumference and divide by pi (3.14).

For tubes that fall in-between UltraSonic sizes, smaller size is the default recommendation (though either size will work). Tube size data indicates "maximum" tube diameter; tubes are often a little smaller than indicated. Titanium C-rings have some flex to them to accommodate variation in bulb diameters and can be bent to somewhat smaller or larger sizes.

Additional information, including bulb sizes, on most tube types and brands can be found here:

[ Frank's Electron Tube Data Sheets ]

inches millimeters 

Herbie's Audio Lab offers low prices, high value!

All parts and materials made in USA

-Comments-

Name: M Watters
Message: These things are miraculous on the small tubes of my Lamm M1.2 monoblocks! Highly recommended!
Name: KYLE BROOKS
Message: Hello:

I am the owner of serveral variations of your produsts. Will you be selling the annealed titanium isolation pads without the rings? Thank you, K

Webmaster's reply: Because you need a jeweler's laser welder to attach the titanium pads to a C-ring, they will not be available separately on our website, though they are available by special arrangement.
Name: Whiskey Yong
Message: I received the package today. Installed on the KT-88Z. The make is wonderful. Will it be too hot to hold those tubes? It is too hot for my touch.

Sound wise, just an initial impression, is quieter and more snappy. Seem more bass too. I like the improvement.

Webmaster's reply: Don't worry about the heat with HAL-O III, no matter how hot your tubes run.

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