help with lo frequency rise: problem solved : actually not
- Thread starter kambo
- Start date
Help Support GroupDIY Audio Forum:
actually it wasnt the input trx.
i replaced LL5402 2:1 trx with a spare 10k:600 output transformer to test my SRPP output...
that graph at first picture is actually accurate... i recorded some drums, and bass became huge!
with RMA spectrum looks flat, but in noise graph, its there,
so, my guess is i shouldnt be using 10k:600 where i should be using 2k4:600
( i cant use 10:600 in my system, i am running out of gain anyway, just curiosity)
i replaced LL5402 2:1 trx with a spare 10k:600 output transformer to test my SRPP output...
that graph at first picture is actually accurate... i recorded some drums, and bass became huge!
with RMA spectrum looks flat, but in noise graph, its there,
so, my guess is i shouldnt be using 10k:600 where i should be using 2k4:600
( i cant use 10:600 in my system, i am running out of gain anyway, just curiosity)
Agree with PRR. That graph is -110dB and lower. That's what noise floors look like in tube gear on analyzers. Most of that is under 20Hz too.
You may have a resonant frequency with the transformer in that circuit, which would appear in the noise floor somewhat too.
You may have a resonant frequency with the transformer in that circuit, which would appear in the noise floor somewhat too.
emrr said:
i think that what it is...
any tip for reducing resonant frequency in this case.
10k:600 is connected to SRPP output.
(i loaded trx with 600r, helped a little, but not cured, also made me run out of needed gain)
same SRPP with LL5402 wired 2:1...
