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diyAudio Member
Join Date: Jul 2003
Location: Hannover
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Has anyone experience with the noise performace of a p-JFET as first stage of a MC preamp? I've seen a lot of designs using a 2SK170 or similar as first amplifying stage. But what about a complementary input stage using a 2SJ109 and a 2SK389 as first stage? The datasheet says that the noise figure is the same. The only tradeoff seems the higher reverse transfer capacitance. A complementary N-JFET and P-JFET using all 4 transistors of the 2SK389 and 2SJ109 should also have 6 dB less noise than using only a single JFET. And is the noise performance of a 2SJ109 worse than a 2SK170?
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| Thread | Thread Starter | Forum | Replies | Last Post |
| GB: for 2SK389 and 2SJ109 | A'af | Group Buys | 791 | 28th March 2011 04:43 AM |
| What are we going to do with all these 2SK389 and 2SJ109? | stoolpigeon | Solid State | 8 | 28th November 2007 10:13 AM |
| Exchange: 2sj109 V for 2sj109 BL | genome | Swap Meet | 0 | 23rd November 2005 11:36 AM |
| WTB: 2sj109-V or 2sj109-BL | rtirion | Swap Meet | 0 | 18th August 2005 01:13 PM |
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