Nice report, John! Thanks. I am just about to build my two ASR's. I
am following your advice and using CA3140's and soldering these in, as
well as the 4052 chips. Do you see any problem with using sockets for
the TL071, TL074, and CD4024? It seems to me these are less critical,
and I do like the option to change chips easily.
What made of chips did you use? I didn't know there were many choices
available for TL074.
I am using:
Texas Instruments: TL071ACP, TL074CN, CD4024BE, CD4052BE
Intersil CA3140AE (DIP, could not find metal can anywhere)
-Richard Brewster
John Loffink wrote:
am following your advice and using CA3140's and soldering these in, as
well as the 4052 chips. Do you see any problem with using sockets for
the TL071, TL074, and CD4024? It seems to me these are less critical,
and I do like the option to change chips easily.
What made of chips did you use? I didn't know there were many choices
available for TL074.
I am using:
Texas Instruments: TL071ACP, TL074CN, CD4024BE, CD4052BE
Intersil CA3140AE (DIP, could not find metal can anywhere)
-Richard Brewster
John Loffink wrote:
>The question of ASR drift has come up before and I finally had my system in...
>a state where I could measure this. I 'm calling it drift rather than droop
>since the voltage drifts upwards rather than downwards. As a first test I
>measured the output voltage of each stage of a dual ASR module. I believed
>I had matched the 1% output stage resistors to better than 0.1%, but the
>reading on OUT3 would seem to indicate otherwise. (This information is in
>table format and may display strangely if you receive in ASCII only.) The
>input clock was about 10 Hertz so there was no opportunity to drift and the
>output voltages were fairly constant. Measurements were taken using an
>Extech MM-560 multimeter with 5-6 digit resolution.
>
>
>