Welcome to our listing and thanks for visiting. After viewing this item, please check our other listings. Here are three type 2A3 radio or electronics tubes. Please view the photographs as we are not experts in tubes. There are three tubes; each one is a type 2A3. One is inside a box. The box and the tube are marked “Sylvania”. The tube is marked “2A3″ on the glass. Each of the other two tubes are marked “RCA”, and marked “2A3″ on the glass. These two tubes do not have boxes. We used a Hickok model 1575 tube tester and we tested the tubes. The Sylvania tube and one of the Rca tubes tested very good. The other Rca tube tested good. Even though the Sylvania tube is in its original box, we are not certain it is an unused tube. We hope that the photos will help those who are interested. We will do our best to answer any questions. Have a nice day. We hope that we have described our items to complete satisfaction. We are not on-line everyday though, so please be patient for the reply. This is to cover costs of boxes and packing material. We do not make any profit from this.
Powers on and plays but could definitely use maintenance (Cleaning, re-cap etc) to get the most out of it. Please see all photos and feel free to reach out with any questions.
All our tubes have been tested for. GAS SHORTS TRANSCONDUCTANCE & EMISSIONS. These tubes have been tested – and are considered NOS ; they meet or exceed the published data set for GM. NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states Individual tubes, like any manufactured product, may have characteristics that range above or below the values given. Test Results are ALWAYS available upon request (if not photographed). Send me a message! I might have what you need! Tubes will be packaged in white boxes – if the original boxes are not photographed in the listing or stated as “with original box” they are not included. 90 % of our tubes are Tv7 tested, our tv7 is Calibrated and our go to tester. The tv7 tester has been around a long time and is a trusted tester for military, who had high standards for reliable tubes that would not fail in critical conditions. Military standards were tubes needed to meet 60/65% which they established as (minimum value). There isn’t a “specific” indicator or result or data set anywhere that universally designates a vacuum tube as “new old stock” when using a tester nor for what test result is given. The best way is to calculate the GM – and check the data sheet for each tube – a “nos”tube should typically measure between the average and maximum micromhos(GM). A common misconception of tube testing is that every unused tube, new or vintage, should test at 100% of the meter scale of the tester. A tube was considered acceptable/new/ passed standards if it tested between the specified minimum and maximum on a tube data sheet or the minimum value specified on the tester (tv7 is minimum is 65%). Tubes do not give the same reading across testsrs – even the same model tester will give a different reading sometimes. If you don’t like the sound of a tube, so long as it is still in the same condition as arrived message me. I DO NOT OFFER A TUBE ROLLING SERVICE, vintage audio tubes typically require a burn in period, that’s where the tube sounds the best. Please see my notes on noise tests below. We have a few different testers available to ensure the quality of the tube (as some tubes can not be tested on the tv7). Tv7 testing is tedious and I spend hours testing tubes and double testing tubes – if you notice a mistake(like a picture doesn’t match the title) please be gracious and let me know. UNLESS PHOTOGRAPHED WITH THE ORIGINAL BOX- tube will come in repackaged white boxes- 50-90 year old cardboard packaging doesn’t hold together well, not in my hands anyways. We have over the last 20 years amassed a huge collection of vintage amps/ parts / tubes and have decided to downsize that collection. Every tube has been marked for tracking and security purposes – these marks wipe off easily and without the mark no return will be accepted. Sound quality is tremendously SUBJECTIVE. Tube tester NOISE TEST. This is a very marginal test, only for special checking. This test needs sound amplification; hearing / listening to noise with headphones would indicate a real disaster inside a tube (THE shorts test WOULD already BE evidence OF THIS). There is nothing wrong with performing that noise test however. That test is not going to tell you whether the tube will be silent in your SET (single ended triode) amp or in anything else. Ultimately, the best way of testing a tube for microphonics is in an actual chassis or amplifier similar to one in which it is intended to be used. Since amps have a wide variety of circuit designs and tube placement, this test is most effective in YOUR AMP or one that is almost identical. Hence, most people advertising tubes as tested for Noise or Microphonics are probably NOT testing them in any meaningful way FOR YOU OR YOUR AMP. “Noise” and “Microphonics” are often buzzwords for other issues. There is a small percentage of tubes that have a problem with noise but far less than most people think. In properly designed circuits objectionable “tube noise” is seldom found. In other words, it is a rare tube that will be noisy when used in most circuits. Always check the data sheet of the tube you plan to use. PLEASE message me BEFORE you open a return. PLEASE NOTE: Tube silkscreen (lettering on the tubes) is VERY fragile. It can be wiped off and destroyed VERY easily.
This is a really fantastic and even rarer vintage tube amp. Unit appears to be complete and original. Speaker inside does appear to have a repair as shown in one photo. Contains all tubes which appear to be original as well. Unit does power up and produces sound. Gets a little squawky when sensitivity knob is turned. Is older piece and we believe in a hard to find size. Most likely will need a good thorough cleaning and once over by technician or Musician. Cabinet does show blemishes and where to tiles as shown. We believe these beauties are getting harder and harder to find and believe this might be the upgrade to the model 15a that looks similar. Great old piece for any musician, restoration or collector!
Vintage Harman-Kardon DA100 Commander PA Tube Amplifier AS-IS Parts or Repair. Cosmetic condition is as shown. Has rust, tarnish, corrosion, scuffs, scrapes, marks etc. Missing a couple knobs. Please see photos as they are part of description and you will receive exact item as pictured. 17 1/8″ x 6″ x 11 3/4. Thanks so much for stopping by! Let us know if you have any questions or need any additional images. Please take a look at our other vintage treasures and cool finds in the store! If you find a number of things you are interested in. Please note that we always try to reuse and recycle packing materials whenever possible.
Scott Vintage Tube Guitar Amplifier Head! Super duper RARE find of a Scott Guitar amplifier Head in great condition and just serviced. It sounds very good as younwould expect from Scott audio products. The Vintage Scott line has exploded in Price, and I have never in 50 years seen one of these. 2 6L6s deliver about 30-40 watts of power. It was just serviced by my master tech and has a new 3 prong chord on it. I don’t think this was used much. Add a reverb to it and you got a killer club amp.
