Balanced Mic Preamp, Transistors...and Studio Equipment

iCebReakEr409 · 25th December 2003, 04:14 PM

Hi,

I'm planning to build my own studio equipment. Well, it's "just" gonna be a small homestudio. Now I'm looking for ideas and schematics for studio equipment... and I haven't found much yet, except for old stuff (using transformers and tubes...what I don't wanna use. not yet.). I also found Rane. But I'd be really happy about more input.

At the moment I'd probably choose this as mic preamp:
http://sound.westhost.com/project66.htm
Or a INA217 solution... I'm gonna experiment with both.

But I have some questions concerning the project66 experiment:
- Which transistors should I use for this project ? As you can see the the original parts can probably be replaced with better parts (TL071 should be replaced, too).
Should I use MAT03 transistors ? I don't know if it's worth the corst. What other transistors could you recommend for this project ?

If you have some other suggestion how to improve the circuit...I'd be happy about any comment

Thanks !

moamps · 26th December 2003, 10:43 AM

Quote:

Originally posted by iCebReakEr409
But I have some questions concerning the project66 experiment:
- Which transistors should I use for this project ?

Hi,

some professional consoles use this combinations:
2SB737/2SC2603/NE5534
2SD786/MC33078
BC550C/BC560C/NE5534/TL071
etc.

The best sound for me has preamp with up-transformer (1:10 or 1:15) and tube or discrete solid state amp.

Regards

millwood · 26th December 2003, 12:08 PM

5532/4 are very popular now with higher-end mixers. some of them actually used 324 in the dark days,

.

you may also find tl08x/07x series but they are kind of old by now.

pieris · 28th December 2003, 06:47 AM

You might also consider TI's newly released PGA2500. It's designed for microphone input, and has a built in serial controlled programmable gain amp. The THD is not as good as, say, the LT1028 or AD797 (both better than the INA217), but after you run the gain through a noisy pot or slider it probably evens out in the end.

pieris · 28th December 2003, 08:03 AM

You might also consider TI's newly released PGA2500. It's designed for microphone input, and has a built in serial controlled programmable gain amp. The THD is not as good as, say, the LT1028 or AD797 (both better than the INA217), but after you run the gain through a noisy pot or slider it probably evens out in the end.

25th December 2003, 04:14 PM	#1
iCebReakEr409 diyAudio Member Join Date: Aug 2002 Location: Germany	Balanced Mic Preamp, Transistors...and Studio Equipment Hi, I'm planning to build my own studio equipment. Well, it's "just" gonna be a small homestudio. Now I'm looking for ideas and schematics for studio equipment... and I haven't found much yet, except for old stuff (using transformers and tubes...what I don't wanna use. not yet.). I also found Rane. But I'd be really happy about more input. At the moment I'd probably choose this as mic preamp: http://sound.westhost.com/project66.htm Or a INA217 solution... I'm gonna experiment with both. But I have some questions concerning the project66 experiment: - Which transistors should I use for this project ? As you can see the the original parts can probably be replaced with better parts (TL071 should be replaced, too). Should I use MAT03 transistors ? I don't know if it's worth the corst. What other transistors could you recommend for this project ? If you have some other suggestion how to improve the circuit...I'd be happy about any comment Thanks !

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26th December 2003, 12:08 PM	#3
millwood Account Disabled Join Date: Apr 2003 Location: US	5532/4 are very popular now with higher-end mixers. some of them actually used 324 in the dark days, . you may also find tl08x/07x series but they are kind of old by now.

28th December 2003, 06:47 AM	#4
pieris diyAudio Member Join Date: Dec 2003 Location: California	You might also consider TI's newly released PGA2500. It's designed for microphone input, and has a built in serial controlled programmable gain amp. The THD is not as good as, say, the LT1028 or AD797 (both better than the INA217), but after you run the gain through a noisy pot or slider it probably evens out in the end.

28th December 2003, 08:03 AM	#5
pieris diyAudio Member Join Date: Dec 2003 Location: California	You might also consider TI's newly released PGA2500. It's designed for microphone input, and has a built in serial controlled programmable gain amp. The THD is not as good as, say, the LT1028 or AD797 (both better than the INA217), but after you run the gain through a noisy pot or slider it probably evens out in the end.

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