Guitar Amp UltraSonic: extra-duty microphonics control

Guitar Amp UltraSonic 9 Damping Instrument

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Guitar amplifiers, especially combo amps, are torture chambers to vacuum tube microphonics. Herbie's extra-duty Guitar Amp UltraSonic Damping Instruments feature titanium C-rings and extra-soft, extra-beefy isolation pads for extra vibration control. Guitar Amp UltraSonics eliminate tube rattle, tube whistling, and microphonic oscillation that might be too severe for other damping instruments to handle.

These are superb damping instruments also for hi-end home audio, delivering pinpoint imaging and detail, outstanding transparency, delicate nuance and sense of "air," with highly punctual dynamics.

For use up to 482° F (250° C); scroll down for size listings.

Guitar Amp UltraSonic 7

Guitar Amp UltraSonic 7 Damping Instrument

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

Guitar Amp UltraSonic 9

Guitar Amp UltraSonic 9 Damping Instrument

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, 6072, 6189, 6201, 6267, 6350, 6385, 6414, 6688, 6829, 6840, 6900, 6922, 6955, 6973, 6AN8, 6BL8, 6BM8/ECL82, 6BQ5/EL84, 6BQ7, 6BW4, 6CA4, 6C45, 6CG7, 6CS7, 6DE7, 6DJ8/ECC88, 6EU7, 6FQ7, 6GC7, 6GH8(A), 6GW8, 6H30, 6GU7, 6N1P, 6N3P, 6N6(P), 6P1T, 6U8(A), 6V4, 7025, 7044, 7058, 7062, 7119/E182CC, 7189, 7199, 7308, 7788, 7AU7, 7DJ8, 8416, Cca, E80F, EC86, ECC189, ECC803/S, ECC81, ECC82, ECC83, ECC85, ECC86, ECC99, ECL86, EF86, EL84, EL86, EM84, EZ80, EZ81, PCL82, PCL86, SV83, T6-1/2 bulb.

$16.29 ea.
4 or more: $15.48 ea.

Guitar Amp UltraSonic 25

Guitar Amp UltraSonic 25

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

$16.69 ea.
4 or more: $15.86 ea.

Guitar Amp UltraSonic 30

Guitar Amp UltraSonic 30 Damping Instrument

Fits narrow, straight-sided octal tubes and all tubes approximately 1-1/8" to 1-1/4" diameter (28mm to 32mm), including 12J5/GT, glass 12SJ7, 12SL7/GT, 12SN7/GT, 3CM, 5691, 5692, "slim" 5AR4 (G.E.), 5Y3, 5Y3GT, "wide" 5Z4, 6106, 6AH4, 6AU4GT, 6AU4GTA, 6AU5, 6BL7, 6CJ3, 6DN7, 6EA7, 6EM6, 6EM7, 6EW7, straight-sided 6F6G, 6FD7, 6FY7, 6H4GT, 6J8P, 6K11, "slim" 6L6, 6N8P, 6N9P, 6SF5-GT (glass tube), 6SH7, glass 6SJ7, 6SJ7GT, 6SL7, 6SN7, 6SN7GT-series (6SN7GT, 6SN7GTA, 6SN7GTB, 6SN7WGT, 6SN7WGTA), 6V6, 6V6GC, 6X5G/GT/WGT, 6Y6, 7355, C3G, C3M, EC8020, "narrow" EL34 (E-H,Mesa/Boogie,Telefunken, SED "Winged C," Svetlana, Tung-Sol), EL34B (Tung-Sol), GZ30, MT8 bulb, PL504, VT-231.*

$16.95 ea.
4 or more: $16.11 ea.

Guitar Amp UltraSonic 35

Guitar Amp UltraSonic 35 Damping Instrument

Fits standard, straight-sided octals and all tubes approximately 1-3/8" diameter (33mm to 36mm), 5AR4 (Amperex, Mullard), "slim" 6CA7, 6H6, bottle-shaped 6J5, standard 6L6/5881, 6L6B, 6L6WGB, 6R7GT (glass), 6SF5 (metal shell), E34LS, standard EL34 (Philips, JJ, Mullard), GZ34, KT77.*

$17.49 ea.
4 or more: $16.62 ea.

Guitar Amp UltraSonic 40

Guitar Amp UltraSonic 40 Damping Instrument

Fits wide and bottle-shaped octals and all tubes approximately 1-1/2" to 1-5/8" diameter (37mm to 44mm), including 0A3, 0C3, 0D3, 1626, 27, 30, 37, "fat-bottle" 5AR4, 5AW4, straight-sided 5R4-types, straight-sided 5U4, 5V3, 5V4, straight-sided 5Y3GB, small-bottle 5Y3GB (Mazda), 5Y4GA, 5Z4G, 5Z4P, 6080, "slim" 6550, straight-sided 6AS7, 6C6, 6CA7, 6F8G, 6HB5, bottle-shape 6J5, 6JN6, 6L6GC (Mazda, JJ, GE, Tungsol), 6P3P, Sophia Electric "bottle" 6SL7 and 6SN7, 7027/A, 76, 84, 8417, 85, EL509, straight-sided GZ32, "Fat Bottle" EL34 (Big Bottle), KT90, PL509.*

$17.65 ea.
4 or more: $16.77 ea.

Guitar Amp UltraSonic 50

Guitar Amp UltraSonic 50

For all tubes approximately 1-3/4" to 2-1/8" diameter (45mm to 54mm), including 1610, 2A3 (RCA, Sovtek, Sylvania, Tung-Sol, Brimar), 26, 274B (Western Electric), 350B, 3D21A, 45 (RCA, Sylvania, TJ, Tung-Sol), 572-10, 5998, bulb-shaped 5R4-types, 5R4WGA/B (Tung-Sol), bottle-shape 5U4G, 5V4, 5Z3, standard and wide 6550 (E-H, RCA, SED, Svetlana, Tung Sol), 6550C, bulb-shape 6AS7, 6B4, 6B4G, 6C33C (upper portion of tube), bulb-shape 6F6G, bulb-shape 6L6G, 6N13P, 71A, 80, 807, 811, 814, C327 ("bulb" 27), CX4, bottle-shaped octals like AZ4, CV181/ECC32, CV181-Z (Shuguang), EL37, bottle-shaped GZ32, GZ33, KT66, KT88 (E-H, EAT, GEC, Gold Lion/Genalex, JJ/Tesla, SED, Shuguang, Sovtek, Svetlana), U52.*

Guitar Amp UltraSonic 60

Guitar Amp UltraSonic 60 Tube Damper

For jumbo-size tubes 2-3/16" to 2-5/16" diameter (55mm to 60mm), including 101D/101F, narrow 211 (RCA), 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, GZ37, SV811-10, ST-17 bulb, T-18 bulb.*

Guitar Amp UltraSonic 65

Fits giant tubes from 2-3/8" to 3" diameter (60mm to 76mm), including 101F, 102B, wide 211 (Sophia, TJ), 274B (Shuguang, Sophia, Valve Art), 2A3-40W (JJ), 2A3 Meshplate (Sophia TJ), 2A3 Globe Meshplate (Sophia, TJ), 2A3C (Shuguang), 300B (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), Globe 45 (TJ), 520B, EML 5U4G-Mesh & 5Z3-Mesh, 6C33C (wide portion of tube), "wide" 805 (Amperex, Shuguang, TJ), 813, wide 845 (Sophia, Shuguang metal plate, TJ), 845B (Shuguang), GM70, F2A, PX25, ST-18 bulb, ST-19 bulb, T-20 bulb.*

$24.95 ea.
4 or more: $24.29 ea.

Guitar Amp UltraSonic 100

With extra-heavy-gauge stainless steel C-ring and four isolation pads, 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.

$19.49 ea.
4 or more: $17.99 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 

Changing gear? Heavy Duty UltraSonic isolation pads can be easily slid off one titanium C-ring and onto another. All sizes are interchangeable. If you need a different size than what you have, spare C-rings are available, so you don't have to buy a whole damping instrument to change sizes. Heavy Duty UltraSonic Isolation Pads fit all Herbie's titanium C-rings, including extra-heavy gauge UltraSonics.

Titanium C-Ring Only (no pads)
UltraSonic sizes Mini thru 65
$5.89 to $16.95 ea.
(4 or more, one size: 10% off)

Heavy Duty UltraSonic
Isolation Pad Only
(with frosted black sleeve)
$3.89 ea.
(12 or more: 10% off)
All parts and materials made in USA

-Comments-

Name: CS Weldon
Message: These things are so useful, I just ordered a second set! Thanks for making such a great product!
Name: David Leonard
Message: Wow! I just put some of your tube dampers on the power tubes of my electric guitar amp. The microphonics are gone and the sound is much tighter. Unfortunately, they don't help me play better, but I sure do sound better. Biggest improvement I have made to my amp for the price.

Thanks.
Name: George Pettas
Message: Your Guitar amp Tube dampers work wonders in every condition, light or severe and do subtract great amount of vibration. I have tried them first with Siemens Cca (1962), as most tend to be microphonic, but the most amzing thing is they work extremely well with Amperex USN-CEP 7308 (1964) and Philips Miniwatt E88CC SQ (1961) on my SF Power 2.

They do sound different from Ultrasonics and Pre Amp ones and after extensive listening and some period to break in, i can say that the correct combination, with your tube dampers will definitaly do the trick musically. GO THE HERBIE TREATMENT ALL THE WAY. Thank you again for giving such a joy to all audiophiles.
Name: Rick Cameron
Message: Just installed the tube dampers in my '93 Fender Super Amp and they did everything that was advertised. It seldom that things work out that well. The rattle stopped and the tone is great. The guys in our band appreciate it as well. Thanks Rick C.

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