7025 SYLVANIA JHS VINTAGE TUBE 17MM 12AX7A 12AX7 NOS NIB (1968) *eTRACER*

Description

You are bidding on
SYLVANIA 7025 \ 12AX7A \ ECC83 Vintage Preamp Vacuum Tube
(5 Tubes Total Available For Sale \ 1 Tube Per Bid)
17mm Grey plates, halo getter, October, 1968 packing dates.
Tubes are very fresh, in NOS condition with complete labels, and good boxes.
Well balanced triodes, and you can have several matched pairs out of this lot should you purchase multiple tubes.
The labeling indicates a very rare configuration, you don't see them labeled like this usually.
Our inspection of the boxes tell us they are the same contracts \ construction as the military boxed JHS 12AX7 units, with thick mica spacers and plates, hand selected and designated as a 7025.
We also have more of these in another listing with 1972 date codes.
You will not find 7025 like this anymore, supplies are dwindling!
Tubes are audio tested in an amplifier by us personally, a service you will not get from any other tube dealer.
*Tested in 1963 Fender Twin Reverb
Tested on our eTracer & Hickok 800A testers.
Values for plate current (mA), Rp, Gm and Mu are detailed below.
Corners test simulates natural voltage spikes under real operating conditions and tracks plate current variations.
Tube #1:
Triode #1 -  Plate Current = 0.94mA \ Rp = 71456 \ Gm = 1495 \ Mu = 106.8 \ Corners = PASS
Triode #2 -  Plate Current = 1.00mA \ Rp = 68195 \ Gm = 1516 \ Mu = 103.4 \ Corners = PASS
Tube #2:
Triode #1 -  Plate Current = 1.17mA \ Rp = 62982 \ Gm = 1555 \ Mu = 97.9 \ Corners = PASS
Triode #2 -  Plate Current = 1.00mA \ Rp = 69749 \ Gm = 1420 \ Mu = 99.0 \ Corners = PASS
Tube #3:
Triode #1 -  Plate Current = 1.03mA \ Rp = 62118 \ Gm = 1619 \ Mu = 100.6 \ Corners = PASS
Triode #2 -  Plate Current = 0.74mA \ Rp = 80532 \ Gm = 1315 \ Mu = 105.9 \ Corners = PASS
Tube #4:
Triode #1 -  Plate Current = 0.87mA \ Rp = 70413 \ Gm = 1484 \ Mu = 104.5 \ Corners = PASS
Triode #2 -  Plate Current = 0.87mA \ Rp = 72769 \ Gm = 1400 \ Mu = 101.9 \ Corners = PASS
Tube #5:
Triode #1 -  Plate Current = 1.05mA \ Rp = 60743 \ Gm = 1664 \ Mu = 101.1 \ Corners = PASS
Triode #2 -  Plate Current = 0.89mA \ Rp = 71053 \ Gm = 1495 \ Mu = 106.2 \ Corners = PASS
We have more great vintage rare tubes listed right now in our store, check our store for details.
Note to customer:
Returns:
We provide a 30 day return policy for our items, as long as they are in 100% the same condition as when we listed it.
Past 30 days, we cannot offer any guarantees a vintage item will continue to function.
If you have a problem within 30 days, please contact us immediately so we can help you resolve it.   Please keep any boxes, pins or labeling intact.
If an item is returned altered, damaged, or different from how we listed it, we may charge a restocking fee depending on the condition of the returned product.
Test Results:
First, we test all of our tubes, in both a calibrated tube tester, and perform a live audio test in guitar, hifi and vocal amplifiers.
Our testing practices are stringent, and have given us well over a decade of satisfied clients.
Still we cannot guarantee exact test result numbers or data,
nor can we foresee the results you will have using our parts in your equipment.
Our recommendation is to contact us before purchasing so we can do our best to help you find a good match for your needs.
We do not offer partial refunds or returns based on test data or test numbers.
NOS Tubes:
"NOS"  is a search term many buyers use on eBay to search for vintage tubes.
This is a widely criticized word that many electronics experts and hobbyists \ enthusiasts
do not like to hear unless the item is brand new, sealed in the box.
When it comes to listing as a seller, sometimes to match your product with a buyer who may be looking for your item, but doesn't
always know the proper terms to search, you must use the terminology most used by the buyer for the product they are looking for.
Many tube buyers only know vintage tubes by the term "NOS" and will not type "vintage" when searching for what they are looking for.
Therefore, when we list "NOS" in the title, we are only describing a vintage tube.  When a tube is new in box, we will combine that with the term "NIB", or "New In Box".
We will also list that the item is "NIB", "NOS", or "new in box", when a vintage item meets a certain threshold of visual quality combined with test data for it's age and type.
This still may show signs of handling, marks, dirt, dust, rust, patina,or tarnish.   This is normal for items stored for many decades in sometimes less than ideal climates.
These items also have been understandably handled and changed hands many times over their life.
This usually results in less than perfect cosmetic condition, but by no means indicates the item is used.  Most audio experts are in 100% agreement on this.
We hope this clears up the title term NOS for some buyers who have or will inquire about this.
We are not trying to misrepresent our items, we are simply attempting to put our listings into the hands of those who want to see them.
Performance Of Vintage Items:
We cannot guarantee a vintage item will perform the same with or in your equipment as it did in ours, or that a vintage item will continue to function once it is used.
We list our items honestly and accurately as possible, many times the items we are selling are 50-80 years old.