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Description
ECC83K 12AX7 EI Yugoslavia Short Smooth Plates 14mm NOS Matched PairTwo (2 pc) fully tested NOS NIB tubes, platinum matched pair of extremely rare ECC83K 12AX7 EI made in Yugoslavia on geniuine Philips & Telefunken made tooling machines . They are real vintage NOS tubes in original Edicron boxes made back in 1997 in EI tube factory in Nis, Serbia. (Elektronska Industrija Nis) This is extremely rare version with slightly lower amplification factor, low microphonic and low hum, shield between triodes, it's unique design
Two (2 pc) fully tested NOS NIB tubes, platinum matched pair of extremely rare ECC83K 12AX7 EI made in Yugoslavia on geniuine Philips & Telefunken made tooling machines .
They are real vintage NOS tubes in original Edicron boxes made back in 1997 in EI tube factory in Nis, Serbia. (Elektronska Industrija Nis)
This is extremely rare version with slightly lower amplification factor, low microphonic and low hum, shield between triodes, it's unique design of EI research & development department and it's made on both Philips and Telefunken toolings. They are excellent choice for RIAA preamps as well guitar amplifiers.
We have few 100 pcs boxes of these tubes and we had enough time last few months to carefully measure them on our Metrix and Tesla tube testers for plate currents and Hickok for transconductance and to make platinum matched pairs with balanced triode sections.
Great choice for ECC83 / 12AX7 RIAA preamps!!!
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4.7 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
Five Stars
Format: Paperback
This helped a lot for us to prepare for the SLATE exam.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 23, 2016
★★★★★ 5
Good
Format: Paperback
This is great! I like this one.
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Reviewed in the United States on June 22, 2016
★★★★★ 2
Good to have if you've never seen the iTEP exam, but don't rely on it to boost your scores
Format: Paperback
This book is good in that it comes with two practice tests: one in the beginning of the book, one in the end of the book. The grading rubric is helpful too. However, the actual guide part of the book, doesn't help too much with how to improve test scores. What I like least about this guide is that it won't tell you which questions you answered incorrectly on the practice exams. A good test prep guide will tell you what you answered incorrectly, and will tell you what logic to follow to get to the correct answer. In the reading passages, it would be nice to know where I can find evidence to justify the "correct" answer. In the grammar section, it would be nice to know which rule I'm violating. Any test guide should always come with some testing strategies. I.E. If this question is taking up too much time, skip it and go to the next one. This guide lacks simple strategies like that. Simple strategies like that could be useful when incorporated into this guide because there are certain sections on the exam that you can go back to previous questions, but some sections where the "back" button is disabled.
Overall, if you've never seen an iTEP exam before, this book is certainly helpful in that it will give you an idea of what you will be testing for. However, this book alone won't help you achieve a score of 6. The table of contents itself will tell you there are only 86 pages of actual content covering test material. That's not enough to cover how to excel in the exam.
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Reviewed in the United States on January 27, 2015
★★★★★ 1
Don't buy it
Format: Paperback
It does not prepare for the real test.
Using it is absolutely not enough to be approved with good grades.
Too expensive for what it offers.
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Reviewed in the United States on October 21, 2016
★★★★★ 5
Five Stars
Format: Paperback
great
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Reviewed in the United States on September 18, 2016