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Лампы 7199 в Dynaco SCA-35

Додано: 05 листопада 2017, 15:50
борик
:hi: Всем доброго!
Хотелось бы однозначного ответа на чайницкий вопрос.
Насколько корректна установка 6Ф1П вместо 7199 через переходник, купленный у китайцев?
Спасибо! :)

Re: Лампы 7199 в Dynaco SCA-35

Додано: 11 листопада 2017, 15:47
борик
Ну ладно. На случай, если кому-нибудь кроме меня понадобятся эти сведения, вот выдержка из статьи калифорнийского самодельщика и ссылка на саму статью и сайт. http://www.vacuumtubeaudio.info/project2.htm
Measurements were taken on one channel of the amplifier with the 6U8A installed using the plug-in adapter. No significant differences were observed in frequency response, THD, IMD, or noise. The photo on the left shows the amplifier on the bench under test. The photo on the right shows the plug-in adapter. You will note that aesthetically the device may leave something to be desired in applications where the tube is visible. Still, it is an easy and inexpensive modification, and it avoids the difficulty of finding the 7199 type. The cost difference between a 6U8A and a 7199 is quite significant (in one case nearly a 10x difference). The larger question, however, is how long the 7199 will continue to be available—at any price. Therefore, having a backup-device type is important.

6U8A tube adaptor
Following the successful tests of the 6U8A substitution for the 7199, tests were made on the 6GH8A as a substitute for the 7199, again using the 9-pin socket adapter. Listening tests were conducted that compared one channel with the 7199 and the other with the 6GH8A. No significant differences were detected. Bench tests showed performance comparable to the 7199 and the 6U8A.

It should be noted that some users have a preference for the sound of the 7199 over the lower-cost substitutes. The listening tests by the author as described here were not exhaustive. All other things being equal, the author recommends using the 7199. The problem, however is the difficulty of finding the 7199. At some point device availability must take precedence over preferences.

Re: Лампы 7199 в Dynaco SCA-35

Додано: 25 листопада 2017, 16:03
69-K.Serg
борик писав::hi: Всем доброго!
Хотелось бы однозначного ответа на чайницкий вопрос.
Насколько корректна установка 6Ф1П вместо 7199 через переходник, купленный у китайцев?
Спасибо! :)
7199 замечательная лампочка, 6gh8 значительно хуже. :sad:

Re: Лампы 7199 в Dynaco SCA-35

Додано: 17 грудня 2017, 00:19
борик
Вас понял, спасибо. :)