EMRFD Message Archive 12156

Message Date From Subject
12156 2016-01-03 17:50:31 Bill Meara Building R2 -- Replacement for LM387?

I am resisting the temptation to jus throw any old AF amp in there. I know Rick worked hard to come up with a quality AF amplifier circuit. But the LM387 isn't around anymore. Any suggestions for a replacement or equivalent IC? Thanks, Bill N2CQR

12157 2016-01-03 18:28:17 K5ESS Re: Building R2 -- Replacement for LM387?

Well the NE5532 is a low noise amp (a little better than the LM387 I think) and it’s used in many of the audio circuits in the EMRFD book. It’s not pin compatible with the ‘387 though.
Mike K5ESS

12158 2016-01-03 18:57:20 Dave Re: Building R2 -- Replacement for LM387?

I use the MC33078 as in the audio pre-amp circuit of the UHFSDR. Different pinout than the LM387, but is the standard dual op-amp 8 pin pinout. The Softrocks use the LT6231.

Dave - WB6DHW

12156	2016-01-03 17:50:31	Bill Meara	Building R2 -- Replacement for LM387?
Message	Date	From	Subject
I am resisting the temptation to jus throw any old AF amp in there. I know Rick worked hard to come up with a quality AF amplifier circuit. But the LM387 isn't around anymore. Any suggestions for a replacement or equivalent IC? Thanks, Bill N2CQR
12157	2016-01-03 18:28:17	K5ESS	Re: Building R2 -- Replacement for LM387?
Well the NE5532 is a low noise amp (a little better than the LM387 I think) and it’s used in many of the audio circuits in the EMRFD book. It’s not pin compatible with the ‘387 though. Mike K5ESS
12158	2016-01-03 18:57:20	Dave	Re: Building R2 -- Replacement for LM387?
I use the MC33078 as in the audio pre-amp circuit of the UHFSDR. Different pinout than the LM387, but is the standard dual op-amp 8 pin pinout. The Softrocks use the LT6231. Dave - WB6DHW