Lot of 3 Vintage Sylvania Westinghouse 12AU7A ECC82 Pre Amp Black Plate Tubes

Description

Amplitrex AT1000 where Emission/Gm - Emission/Gm is % of NOS 100% value.
Low noise, no microphonics.
Testing
Tubes will be tested on a 2018 Amplitrex AT-1000 and/or TV-7.
Tubes are tested on Fixed Bias Mode -  the bias voltage is set to the specification value. Plate current will be whatever the tube is capable of and the
results
shown
represent deviation from specification value, with 100% matching
specification
value.
We can also run computer generated specific results should they be requested.
Boxed in either their original boxes (if available) or white boxes*.  Tubes will be labeled on the box.
High-end tubes will be tested for noise using a custom setup.
Packed and shipped professionally.
Second line of pictured results show
specification values of plate current and transconductance, and the third line shows the actual values of plate current (in Fixed Bias Mode) and the transconductance that were measured during the test.
Tube Grading
We assign the following grades to our tubes:
100 Gm or above - VERY STRONG
80-100 Gm -           STRONG
65-90 Gm -             GOOD
50-65 Gm -             WEAK
Gm is displayed in milliamperes-per-volt. Multiply by 1000 to convert mA/V into uMHOs.
Emission is reflected on a scale of 1-100%.  A Tube testing 90% will have 90% of
emission
specified in the data sheets.
Tube Lettering
Although we do our best to preserve the lettering on each tube, due to the fragile nature of the lettering sometimes the lettering may smear or come off during shipment. We cannot guarantee and assume no responsibility if the lettering on tubes smears or partially comes off during shipment. This also applies to un-packing and handling of the tube by the customer. Obviously, if the lettering on the tube comes off due to customers handling of the tube, we will assume no responsibility.
Combined Shipping:
We offer combined shipping.  If purchasing a "buy it now" tube, and you'd like to purchase more than one - do so at regular prices and we shall refund the difference between the shipping costs and what you have paid.
No 1st class shipping to China, Russia, Oceania.  We reserve the option to choose proper shipping method to countries/users at our own discretion.
We don't change values for customs, so please don't ask.
CAUTION:
Often tubes get weak due to leaky capacitors or other issues in the customer's amps, so people replace the tubes but never fix the real issue .  When they insert replacement tubes, the flaws in their gear quickly eats up the replacement tube no matter how strong it is.  If your tubes ware red plating or running abnormally hot,  have your gear serviced prior to inserting replacement tubes.
*Does not apply for Tube Lots
Additional Information about our listings:
We primarily sell used items and attempt to describe and picture all items to the best of our ability. We take very detailed pictures and can take more upon request. We make every effort to ship within 3 BUSINESS days of receiving payment.  Our shipping costs are based on the shipping weight of the item, insurance, costs of necessary supplies, and the cost of packaging. Shipping costs are calculated automatically by the eBay shipping calculator or are listed in our listing. If the item has a fixed shipping price for US-based customers, it reflects the shipping cost for continental US buyers.  ADDITIONAL SHIPPING CHARGES MAY APPLY FOR NON-CONTINENTAL (mainly Alaska, Hawaii, and Puerto Rico) Buyers AND P.O. Box Buyers.
Paying for your purchase:
Once an auction ends or an item is purchased, sellers have to pay auction fees based on the amount of the winning bid, REGARDLESS of whether or not the buyer follows through with payment.  When a buyer fails to pay for an item, the only recourse sellers have is to file a non-paying bidder complaint with eBay to have the auction fees paid by the seller refunded. eBay allows 4 days for a buyer to make payment arrangements before they allow sellers to open a non-paying bidder complaint.   If we do not receive payment or otherwise hear from a winning bidder within 4 days, a non-paying bidder complaint will automatically be opened by the eBay automated seller assistant software. This may impact your ability to purchase items from us, or other eBay members in the future, so please purchase and bid only if you intend to pay.
International Buyers:
All international shipments are by USPS Priority mail international.  International bidders are responsible for all customs fees. We will not mark items on customs forms as gifts or declare a value lower than the winning bid so please do not ask us to do so.   If an item is listed as no international shipping, we will not ship it outside of the US (unless arrangements are made) but will ship to a US address for international bidders.
Would you sell this for this to me right now?
If there is not a "buy it now" price listed on the item, it means we intend to let the auction run to completion so please do not ask us to end the auction early (we usually do not reply to these messages).
Your Shipping Address Information:
We use the eBay seller assistant to print shipping labels.  The Assistant copies the address information listed on the buyer’s eBay/Paypal account.  It is the responsibility of the BUYER to ensure that the address listed on their account is current and correct.  We do not accept responsibility for a shipment being sent to the wrong address if the buyer provides an incorrect address on their eBay/Paypal account.
Here to make you happy:
We strive to have all our buyers 100% satisfied.  If you have any questions or issues after receiving your item, PLEASE contact us prior to leaving feedback or opening a case through eBay so that we may directly address the issue.  Our policy is to leave feedback after the buyer leaves feedback. If you have any questions not answered here, please contact us prior to bidding. We answer all questions in a timely matter.