e-mail: brentjes@audiotubes.com

The Silicone Stopper

The Hammond special Damper/Shield

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Brent Jessee Recording presents four problem solving vacuum tube accessories that set a new standard for vacuum tube dampers and coolers! The Brass Ring^tm; just $29.99, is an effective, solid brass tube damper, cooler, and adds a visually rich touch of gold to your equipment. The Copper Stopper^tm; just $39.99, is a massive, solid copper surround that solves even stubborn microphonic and image smear problems, shields against stray RF and electromagnetic hum fields, and cools the tube better than any other tube accessory on the market! Both accessories will effectively damp tube vibrations that can cause ringing, microphonics, and sonic distortions. Since these are both constructed of solid metal, they will effectively cool the tube by convection and radiate the heat away faster than a tube with no cooler attached. Both of these have an internal heat-resistant strip of multiple shock-absorbing "fingers" that grip the tube gently, and is firmly bonded to the metal. Both types are also available for use on tubes with very high bulb temperatures. These high temperature metal dampers use a specially-bonded cushion insert of pure Teflon for superior performance under extreme temperatures, such as those found on tubes like the 6BQ5/EL84 and others. Let us know which tubes you want dampers for and we will supply you with the appropriate type. The $24.99 The Hammond damper/shield^tm; Made for the Hammond Organ company, these high grade aluminum shields completely surround your sensitive 9 pin glass preamp tubes. Inside, from the mid-section to the top, there are four spring "fingers", that gently grip the tube. These cushions give the most intimate contact of the damper to the tube, more so than any other damper on the market. These give EMI and RF shielding to the tube, plus cooling, as well. The Cinch Military special damper/shield^tm; just $29.99, is a military grade aluminum damper shield with no less than 22 metal damper "fingers" inside that damp the tube like no other! It is military spec to boot! The Silicone Stopper^tm; just $8.99 for TWO, is the solution for microphonics and ringing in larger power tubes and octal base twin triodes like the 6SN7 and 6SL7. This flexible pair of high temperature silicone rings fits perfectly over larger tubes and damps the vibration problems dead.

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THE BRASS RING

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This elegant ring of solid brass will solve most vibration, microphonic, and audio image problems. Just 1/4 inch wide and gently tapered from the center to each edge, this gleaming ring of solid brass slips onto any 7 or 9 pin miniature glass tube. All Brass Rings are supplied as the high tempature type for use on all tubes. The special internal cushion of pure Teflon gently grips the tube. This pulls the opposite side of the ring into intimate contact with the glass, where the metal wicks away the heat and radiates it away from the tube. Our listening tests with The Brass Ring have discovered it opens up recorded music, and surrounds each instrument with air in a wide and deep soundstage. Most other tube dampers are not substantial enough to effectively damp vibrations really well and offer no cooling, and other tube coolers do nothing for damping vibration. The Brass Ring does both. Only metal tube dampers have the mass to halt vibration, and our special shock absorbing grip system does it especially well. Being metal, it is a perfect tube cooler, and good cooling may extend the lifespan of your valuable tubes. Custom handmade and available ONLY from Brent Jessee Recording & Supply, Inc.

CLIENT COMMENTS: "Hi, I received the Brass Rings today and I have to say their effect was pretty remarkable and a big improvement over the Teflon rings I had tried. Much improved focus, imaging, and dimensionality. If I had more than one tubed component, I would buy more of your Brass Rings! Thanks for a great product."

Regards,

PB

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 "The Brass rings are simplicity at their core, and concerning the sound, what little overhang I might of had in the Bass is all gone.  The pre-amp is located in between the huge speakers-no other option- and what little sonic abnormalities I had are all a specter of my past now. Thank you so much and will be dealing with you soon again.  Talk soon, your friend, J. M."

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Brent,

Brass rings received. They work very nicely: deeper, more sustained, articulate bass, and in general, tones across the spectrum have a weightier yet articulate presence. In other words, sweet!

John

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Hi Brent-

I received both and installed both items on the tubes in my phono stage.  I noticed a positive change in sound and also, I got rid of some of that "sonic" ring that can accompany such a high gain component like a phono stage.  

Thanks.

-JM

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Hi Brent,

I received the brass ring and was pleasently surprised. Prior to it, I was using a slicone ring which I thought was ok, however, now I know better. Much more clarity, which is what I wanted.

Thanks,

W.

THE COPPER STOPPER

Stop tube vibration, microphonics, and electromagnetic hum problems dead with the massive, solid copper "Copper Stopper" tube damper. This unique tube damper/tube cooler is the most massive on the market. Made entirely of solid cast copper, it completly sheaths the tube within it's sixteenth-inch thick walls. All Copper Stopper dampers are currently being supplied as high temperature for use with any tube. The combination of the heat resistant, pure Teflon cushion, plus the sheer mass of solid copper surrounding the tube eliminate even stubborn ringing or microphonic problems. The damper can be adjusted up or down on the tube, effectively shielding the plates completely. It can also be lowered completly to the point at which it touches the metal chassis of your equipment, effectively grounding out stray RF or electromagnetic hum fields. It's large outer diameter effectively doubles the heat-radiating surface area of the tube, and it vents heat away from the tube like no other cooler can. Our listening tests reveal The Copper Stopper brings the music into sonic focus, puts air around the perfectly placed instruments, and both deepens and widens the soundstage. Forget those puny wire or plastic tube dampers, or ineffective finned tube coolers. This burnished solid-copper damper/cooler beats them all! Custom handmade and available ONLY from Brent Jessee Recording & Supply, Inc. Specify 9-pin or 7-pin size when ordering.

CLIENT COMMENTS:

Brent,

I received the Copper Stoppers and installed them on the Siemens 88CCs in my preamp.  There was immediate improvement in the depth and focus of the soundstage.  Time smear artifacts were eliminated; the music attacks and edges were much cleaner.  My sense is that the cleaner preamp signal provided additional headroom to my 6 watt SET power amp.  

R.A.

Brent,

The Copper Stopper works great! It barely fit in my amp (the Brass Ring was much easier to install), but I'm sure glad I'm able to use it. The Ring provided a nice improvement in sound, but the Stopper is noticeably better....... a sharper, clearer image. Both of these products are excellent, and will fit where a lot of similar products may not fit.

Regards, D.C.

Hi Brent,

"The dampers arrived, they are very good, I'm using the Copper Stoppers in the down position (touching the chassis) on my Air Tight ATM-300. I can hear a better soundstage and air around the instruments... congrats !!! A more focused image, too. "

Best!

N.

Hi,  

I just received the copper stopper.   Man!!!    That thing makes not only my microphonic tubes function and sound great, but it also drastically improves the sound of every tube I tried it on!!!!!   NO KIDDING.  The copper stopper gave every tube a more solid sound without compromising all the detail and layers of sound from the tube.

J.D.P.

Hello Brent,

My Copper Stopper arrived in the mail yesterday and I am absolutely thrilled to find out that once installed, my precious long-plate 1958 Mullard 12ax7 is no longer microphonic!! I was so concerned I'd have to shell out the big bucks for another vintage Mullard tube or simply be forced to use this tube in a phase-inverter position or in another amp. This tube has been the magic ingredient in my 18 watt guitar amp and now it's fully functional once again. I put it through the test at full throttle for about 1/2 hour and no microphonics any more.

Simple, yet ingenious, so thank you.

Cheers,

S.K.

"Just received my 4 copper stoppers which are now on my 12AU7 input tubes for home stereo monoblock amp use. The units allowed a good bit of additional detail (especially in the higher frequencies) to come through the speakers. A very, very good expenditure."

Sincerely,

M. P.

"Hi Brent, Received the Copper tube damper rings and at first was skeptical on what difference it would actually make on my new Mcintosh MC 275 and wow I was surprised, sound image was more clear and more defined, bass notes could hear a lot better separation between instruments. I have them on the 12AT7's and now ordered 3 more for the 12AX7. A big upgrade on sound at a small price. Also the fit and finish is very well done looks great around the tube. Thanks Brent.  

Val

THE HAMMOND SPECIAL DAMPER/SHIELD

THE HAMMOND SPECIAL DAMPER/SHIELD

Made for sensitive tube circuits in vintage Hammond organs, these high grade aluminum shields completely surround your sensitive 9 pin glass preamp tubes. Inside, from the mid-section to the top, there are four indented metal spring sections that gently grip the tube. These cushions give the most intimate contact of the damper to the tube, more so than any other damper on the market. The total shield surround of the tube blocks RF and EMI noise that can enter the audio signal path, and the damper can be pushed down to make contact with a metal chassis to create a ground path for this noise. The lightweight aluminum quickly absorbs heat and radiates it away from the tube, and the inner surround metal cushioning fingers give vibration damping to the tube to a higher degree than any other shield damper. These are new old stock audio grade tube damper/shields, and are not currently being made. These fit any 9 pin preamp tube such as the 12AX7, 12AT7, 12AU7, 6922, 6DJ8, 6U8, 7199, 6CG7, 12BH7, and any others this size. They will also fit larger 9 pin power and output tubes such as the EL84/6BQ5, 6CA4/EZ81, 6BM8, etc. Try these and see why they were chosen for use in some of the most elaborate and expensive Hammond vacuum tube organs, and hear the difference that this degree of tube damping makes with your sound!

CLIENT COMMENTS:

"I received my Shields today and I'm shocked by the improvement with all of the 9 pin tubes in my stable.  Bass impact, control and extension  improved to such an extent that I had to dial back the gain a bit on my sub.  I must say my system has graduated to the next level of fidelity, I know an often over used phrase, thanks to this damper.  

Regards,

D.J.

NOTE: You should not use any brand or type of metal tube damper/cooler on a tube unit where the tubes are mounted upside down. The metal damper/cooler could fall off an upside-down mounted tube, causing damage to other components in your set. We also do not recommend using metal tube damper/coolers of any brand or type on tubes directly mounted onto Printed Circuit (PC) boards where the PC board solder connections are directly exposed in the vicinity of the tube. Should the damper be dropped, or pushed down onto the solder connections of an energized PC board, it could cause a short-circuit causing equipment damage and possible shock hazard.

Glass tubes are fragile and contain a high vacuum. If broken, there is danger of injury from sharp glass and flying glass. Never force or twist any type of damper onto a tube. Tube equipment contains high and hazardous voltages that can be lethal, even for a time after the unit has been unplugged. Be safe, never install the dampers on tubes still mounted in equipment. Remove the tubes first. If in doubt, consult an amplifier technician to mount the dampers for you.

THE CINCH MILITARY SPECIAL DAMPER/SHIELD

THE CINCH MILITARY SPECIAL DAMPER/SHIELD

They are back, the rare military grade damper shields! These high grade aluminum shields completely surround your sensitive 9 pin glass preamp tubes. Inside, from the mid-section to the top, there 22 metal spring sections that gently grip the tube. These cushions give the most intimate contact of the damper to the tube, more so than any other damper on the market. The total shield surround of the tube blocks RF and EMI noise that can enter the audio signal path, and the damper can be pushed down to make contact with a metal chassis to create a ground path for this noise. The military grade lightweight aluminum quickly absorbs heat and radiates it away from the tube, and the inner surround metal cushioning fingers give vibration damping to the tube to a higher degree than any other shield damper. These are new old stock audio grade tube damper/shields, and are not currently being made. These fit any 9 pin preamp tube such as the 12AX7, 12AT7, 12AU7, 6922, 6DJ8, 6U8, 7199, 6CG7, 12BH7, and any others this size. They will also fit larger 9 pin power and output tubes such as the EL84/6BQ5, 6CA4/EZ81, 6BM8, etc. Try these and see why they were chosen for use in military equipment, and hear the difference that this degree of tube damping makes with your sound! The picture is representative, labeling on the damper may vary.

THE SILICONE STOPPER

Stop tube vibration, microphonics, and annoying ringing (in guitar amps) with these high temperature silicone rings made especially for power tubes and larger GT tubes. These silicone rings are made especially for power tubes like the 6V6, EL34, and large GT twin triodes like the 6SN7 and similar. The construction is silicone, which shrugs off high tube temperature and stretches to conform to various power tube sizes. Sold in pairs of two, the damper can be adjusted up or down on the tube, and you can use one or both for maximum damping effect. When the matched pair of two rings is put snugly around a power tube, they will hug the glass and dampen even stubborn vibration. Unlike metal dampers, there is no danger of them falling off if the tube is mounted upside down, and they are not electrically conductive so there is no danger if they are dropped onto a circuit board. Our listening tests reveal The Silicone Stopper brings the music into sonic focus, puts air around the perfectly placed instruments, and both deepens and widens the soundstage. Forget those puny wire or plastic tube dampers, or ineffective finned tube coolers. This simple translucent white silicone damper beats them all! Custom made and available ONLY from Brent Jessee Recording & Supply, Inc. $8.99 for a set of two rings. Two rings are recommended for each tube for maximum effect, although you can treat two tubes with one pair of rings, if desired.

Questions? Call us at 847-496-4546 from 8 AM until 4 PM, Monday through Friday, USA Central Standard Time. Or, e-mail us.

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