The TA-2000F FET noise levels are comparable to transistors, if not totally silent. FETs may only have low spec in comparison, but a FET for the principles of it does not need much power to work unlike a regular silicon transistor. It sounds as punchy, crisp & deep bass as a Silicon Transistor preamp. But it's not the Differential that's the problem, so how about the FET? So to try upgrading the TA-2000F with all our ideas but leave the FETs be. We've found Differentials are fine in Audio, but the trouble is, the Differential Era generally starting from 1971 is where cost cutting takes place, the Differential gives good specs if the sound can be awful. FETs are in FM Front End sections of a Tuner & this was an idea first used in c.1968 with the Sony STR-6120. We really didn't expect too much from it, so to leave the FETs & not try to replace with Silicon even based on the earlier TA-2000 preamp yet upgrade the rest. Progress in Upgrading gets a 1971 Sony TA-2000F here, to see what a preamp with so many FETs like the TA-1130 has can be upgraded like. But as with Differentials, we need to find out what is bad & what is good, no-one else tells you info on these things & for us to find out is the only way. Usually the FET we saw was a bad idea trying to cover bad design as the Yamaha CR-1000 uses them on the preamp to mute a power-off click. The NAD 300 huge receiver had FETs in the preamp & we couldn't do much with the amp, but on later looking at the circuits, the whole power amp is a bad design. We have long thought FETs were the weakness in the Sony TA-1130 & other amps that used them in Audio Stages. So more blogs until the HFN/RR is read through & then blogs will be far fewer, unless we go back to 1956-1969, if that probably needs a different page as it's less relevant to Today's Hifi, but the 1956-62 era were interesting, so worth writing more on & the HFN & HFN/RR mags pre 1980 are long gone now despite some selling 50,000-70,000 copies not many survive as with most magazines. The lucky Silver Amps stayed stored away. The Silver Era ends gradually & by 1986 perhaps a Silver amp is a Hifi Leper, ones we used to see at Car Boots in the early 1990s were £20 regardless of how good they were as 'unwanted'. After 1981 things changed a lot as out went the Monster Receivers & in came low powered Pre & Power combos that seem a bit pointless & that era that is riddled with ICs never has interested us having seen enough years back. As of now we are on the November 1978 HFN/RR & we have the set up to Dec 1980, matching the Hi-Fi Yearbook 1981 end. The 2017 blog is huge as so much was found reading through the 1970-78 Hi-Fi News/RR magazine & it helped put facts to the ideas of how Hifi changed, as good as living it at the time. How Much More Blogging Is There In Hi-fi?
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |