G
GregS
Guest
In article <25c4a098-6080-4ea7-9cb1-a21d2215ef22@a70g2000hsh.googlegroups.com>, ".rhavin grobert" <clqrq@yahoo.de> wrote:
You were given two models.
Put some sockets in there and compare.
greg
On 7 Aug., 14:19, Eeyore <rabbitsfriendsandrelati...@hotmail.com
wrote:
".rhavin grobert" wrote:
zekfr...@zekfrivolous.com (GregS) wrote:
zekfr...@zekfrivolous.com (GregS) wrote:
Eeyore wrote:
".rhavin grobert" wrote:
could someone please recommend some alternatives for those chips:
TL 074CN
TL 072CP
i'd like to have some chips that have as few noise as possible. I
dont
care if i have to spend some dollars for a chip, i want them to be
pin-
compatible and nearly without noise. any suggestions?
Depends if the circuit needs the minute input current of bi-fet
op-amps.
There's no shortage of really quiet bipolar ones at sensible prices.
Graham
I would think it depends on the circuit whether a bipolar would work.
OPA4134
is a good bifet,
but you just can't expect it to work if you don't know the circuit.
Power
supply requirments
are essential. Then there's the LME49740.
greg
I don't know why, but I was assuming audio applications. There are all
kinds
of applications that need to be fit into the mix. Is this for
instrumentation
and what is the circuit ?
it for an trace elliot bass amp. see circuit here:
http://tinyurl.com/5cyfcp
except ic1, all ops are TL074. i already replaced ic1 with an OPA 2134
(excellent result) but still have some great humming even when nothing
is connected to the input and mute is pressed. it's definitivle the
main board, not the AHA.
so i wanted to replace all those cheap noisy TL074 with the OPA 4134 -
unfortunately, the PA series (DIP14) is dead;-)
Changing op-amps won't affect humming one tiny bit. You have some other
problem. Could be all sorts
of things. Take it to a tech.
Graham
i am the tech! ;-) the humming is my 2nd problem, i first have to
solve the noise, and as the TL074 are pretty good noise generators, i
want to change them first to have a "clean hum" to start look for and
as the OPA 4134 is dead, i was looking for some other alternative.
You were given two models.
Put some sockets in there and compare.
greg