Vacuum Tube - EL84, Tube Amp Doctor

Tube Amp Doctor (TAD)
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Vacuum Tube - EL84, Tube Amp Doctor

Starting at: $16.75
In stock

Tube Amp Doctor opted for the thickest glass possible and the heaviest construction available, just like the Russian EL84M, and combined these features with the sonically most promising cathode plate options, in order to meet and exceed the tonal quality of the EL84-Cz. Finally, Tube Amp Doctor added the gold grid wire in order to improve overall reliability. The sound can be described as very harmonic in the middle and treble frequencies, without adding too much power to the bass. The result is the best EL84 in current production.

No Compromise!

Q: When does a power tube become a Premium Selected power tube?
A: All power tubes labeled Premium Selected have passed the following tests:
- Plate Current (PC) and Amplification (TC)
- Low Noise Test
- Microphonic Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Shorts & Leakage Tests

SKU:
T-EL84-TAD-X
Item ID:
004858
Brand:
Tube Amp Doctor (TAD)
Type:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Matched PairT-EL84-TAD-MP609722123457
Matched QuadT-EL84-TAD-MQ609722123464
SingleT-EL84-TAD609722123440
Product Measurements
OptionSKUTypeValue
Matched PairT-EL84-TAD-MPPackaging Dimensions1 in. x 2 in. x 3.3 in.
Matched PairT-EL84-TAD-MPWeight0.1 lbs.
Matched QuadT-EL84-TAD-MQPackaging Dimensions1 in. x 4 in. x 3.3 in.
Matched QuadT-EL84-TAD-MQWeight0.2 lbs.
SingleT-EL84-TADPackaging Dimensions1 in. x 1 in. x 3.3 in.
SingleT-EL84-TADWeight0.05 lbs.

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Questions and Answers

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Asked by Anonymous on April 19th, 2016. 1 person subscribed to this question
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JustinG
April 19th, 2016
Staff Member
Top Contributor
The TAD tubes are all premium selected and tested rigorously. In terms of the bias adjustment I always go by the rule of thumb that a bias adjustment may be required when changing output tubes. Many El84 based amps do not require bias adjustments but I would suggest contacting Peavey directly for the details.
Asked by Anonymous on February 11th, 2019. 1 person subscribed to this question
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BradWbr
February 11th, 2019
Staff Member
These tubes are made in China, then sent to Germany for thorough testing.
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Product Reviews

5.00 out of 5 based on 5 reviews
J Bow - March 24th, 2019

Tried this tube in a Vox AC4TV with a 10" WGS G10C speaker. All I can say is it sounds much more well rounded across the frequencies. Nothing harsh compared to the stock Sovtek that originally came in the amp or the JJ's and Tung Sol I've tried. I would say it has a richness that I didn't get with the other tubes mentioned. It's a real winner in my book and I'll continue to use TAD. Now I gotta look into their other offerings for the rest of my amps.

Chad V - June 15th, 2017

Still not sure if I prefer these to JJ in my Vox AC30HW2. I can say I am satisfied with Amplified Parts and their customer service. Good people.

Chad V - June 15th, 2017

Still not sure if I prefer these to JJ in my Vox AC30HW2. I can say I am satisfied with Amplified Parts and their customer service. Good people.

M.W. Acton - June 3rd, 2016

Popped these into a Blues Jr. Tweed. Very satisfying. Big, warm, girth you sound with plenty of cleans and "hair" around the edges, giving a crunchy bite. Unlike JJ's, these don't seem to be overplaying the wattage of the amp; a 15w sounds like a 15w, and I'm not blasting someone's eardrums during rehearsal. Well worth the price.

January 20th, 2012

I put a set of these in a Soldano 20 watt head along with 3 12ax7's from Svetlana and let me tell you these TAD EL-84 tubes are the juice! They blow every other power tube away and I have tried them all. JJ's, Mullard's, Sovtek's, Ruby's, Tung-Sol's, and GT's, just to name a few. None of them come close to the sound of these TAD's! Powerful bass and nice mid's along with sparkling high that are not piercing or harsh. They also made the amp way louder than any other tube combination I have tried. They also have the most clean headroom and since I use a floor processor and some other pedals in my loop that was important to me. My amp now sounds awesome! I play out every week and this 20 watt head keeps up with the 60 watt Fender 4x10 Deville right next to me and the mega Ampeg bass amp from our bass player! We play '70's rock, blues and some country rock. We have a 5 piece band and we play loud. This amp and tube combo are superb! If have a chance to try these TAD tubes, by all means you need to give them a try. I am very pleased with them and I think yo will be too! Awesome choice I made and will never look back! Thanks!

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