great...pressed send while the diyaudio site was doing some work.
basically, I'd like to drop in the Sam Gromer SG LNA-1 into my dynavector P75 stage to see what if any improvements I might get. I'm using a Denon 304 (0.18mV) and with the P75 using the LT1115 the noise levels are OK.
Problem is that the SG opamp uses the 2SC3329BL which is now discontinued.
What to do? Is there any other ultra low noise design out there that DOESN'T use discontinued parts. The JE990 uses the LM394. I need something that is OK with low output moving coil cartridges, down to 0.18mV.
thanks guys
basically, I'd like to drop in the Sam Gromer SG LNA-1 into my dynavector P75 stage to see what if any improvements I might get. I'm using a Denon 304 (0.18mV) and with the P75 using the LT1115 the noise levels are OK.
Problem is that the SG opamp uses the 2SC3329BL which is now discontinued.
What to do? Is there any other ultra low noise design out there that DOESN'T use discontinued parts. The JE990 uses the LM394. I need something that is OK with low output moving coil cartridges, down to 0.18mV.
thanks guys
Do some searching around here and through data sheets
2SC2545 / 46 / 47
2SA1083 / 84 / 85
Haven't measured them but data sheet shows similar specs.
cheers
T
The datasheet on Renesas' website is marked "Not Recommended for New Design", so make your once-for-all-time purchases soon . . .
Dale
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I've given you a perfect replacement here: www.diyaudio.com/forums/solid-state/187651-samuel-gromer-low-noise-opamp.html
Also a lot of other low noise parts are given in this thread.
Samuel
Try 2sa1207 or 2sa1208, hfe might be slightly lower but noise figures are very close to the hitachi parts, very low Rbb.
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