Most of them were played in Grandpa's basement recreation room, and have virtually no wear and tear on the electronics. These are the early Holland types, long plate version with the rare foil strip D-getter. Very detailed, very airy with a great bass slam. Grass Instruments also had a yellow tip version which was even lower noise, but they are rare and difficult to find these days. The soundstage is large, even in mono applications these tubes have a great 3-D image.
These are usually specially selected tubes, and are a great buy---when available! Telefunken tubes have a diamond shape molded into the glass on the bottom center of the tube. This is an accumulation of less-than-pretty Mullard tubes that I did not know what to do with. Just in stock are some nice ones aftermarket screened for use in Marshall and Mesa amps. These sweet tubes are selected for use in audio equipment by aftermarket manufacturers who sold them as replacement parts for their amplifiers. A rare early square getter Mullard, with the famous, elusive longplates and the earliest mC1 production codes. A nice tube that is identical to the Bugleboy tubes listed above, and were made in the same factory.
Normally optional at extra cost curve tracer plate current matching and sensitive noise testing is done to each tube. As a musician for almost 50 years I hear what I hear and I am not dreaming this. Long out of production and rarely found today. Inner detail is fantastic, very transparent, multi layered, solid 3D soundstage. The sound stage, the transparency that Mazda was able to create was unmatched. We can usually match tubes to within 500 micro amps of plate current under full rated plate voltage. These are Brimar or Mullard with the factory code, in a very tightly matched pair, or singles are also available.
Ei Yugoslavia bought all of the old Telefunken stock and equipment in the 1970s, and produced these tubes, that sound very close to Telefunkens! I have rediscovered the music I have available and listen for one whole day to nothing else but music. A few in stock made by Brimar as well. Gone too is that honky, boxy quality, and the tiring upper midrange screech that current production tubes are famous for. It has nine thin pins arranged along the circumference of a circle with a diameter of just under half of an inch. Hickok tested, and then ear tested in a preamp! Fair to excellent labels on those with labels. These have the ultra wide bandwidth of the Telefunken, but with just a touch of midrange warmth.
These are great sounding alternatives to the Holland tubes. Identical tubes to the Siemens label pairs listed above. Best way to describe the sound now is forward sounding powerful with authority i'm not talking about the low-end. Made for medical and hospital equipment, these rare tubes will cure your sonic ills and make your system sound better than ever! This is a sweet sounding, long lived tube. The labels are fair to good on this batch. Some are other labels such as Mazda, some are blank organ repair stock, but are Ei made tubes with the Yugoslavia factory date codes on the glass. I tend to think of them as accurate, and their clean, focused sonic image is astonishing.
The rare French Mazda has the air and sparkle of the Telefunken, the touch of warmth of the Amperex, and adds a nice bit of dynamic punch to the sound. This list is organized now by each vintage tube manufacturer. Grab them if you can find them. This is a sweet sounding, long lived tube. Lord have mercy does it sound good now.
We are probably the only dealer in the world that has a significant number of these available. These pairs have been tested in my amplifier for noise, stereo balance and image, and microphonics, then reconfirmed the match on the tube tester. Wonderful in musical instrument amps. Scroll down to watch the video on this page. A sound very much like the smoothplate, phono-stage or microphone-preamp quiet, with perhaps a bit more warmth in the lower midrange, at a big savings. Mazda presents voice usually a bit upfront of the other instruments, which creates focus on the voice. Regardless, I always associated that orientation with G.
Carefully matched, a very rare chance to grab a matched pair of these superb vintage tubes. To contact the forum owner hit the Contact Us link. The effect on plucked strings and articulation in brass instruments was equally impressive. Many labeled for Burroughs for critical industrial use. These are Brimar with the factory code, in a very tightly matched pair.