http://home.comcast.net/~suptjud/HomemadeHiFi.htm
Care to tell me all the things I did wrong?

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Kind regards,
Terry Judkins


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TerryJ wrote:

http://home.comcast.net/~suptjud/HomemadeHiFi.htm
Care to tell me all the things I did wrong?

One channel looks like it'd work ok, what about the other? :-)

The "blocking" problem occurs because you have
so many CR couplings.
The 0.005 and long tail pair bias R of 1M would give you a pole at 16
Hz
with no FB.
The FB then restores the bass response to get a pole which is lower,
but it shouldn't oscillate at LF with FB.
You might find that the trace on a CRO tends to bounce up and down
a bit with changing signal level, and the "margin of stability" isn't
too high.


Think about the elements of design at
http://www.turneraudio.com.au/htmlwe...0ulabinteg.htm

The arrangement of the input and driver tubes is basically the same as
the topology
you have chosen but there are some networks which improve the stablity.

Patrick Turner.



--
Kind regards,
Terry Judkins

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Checked by AVG anti-virus system (http://www.grisoft.com).
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Thanks for taking the time to look.
Yall have a great day!
"Patrick Turner" wrote in message
...


TerryJ wrote:

http://home.comcast.net/~suptjud/HomemadeHiFi.htm
Care to tell me all the things I did wrong?

One channel looks like it'd work ok, what about the other? :-)

The "blocking" problem occurs because you have
so many CR couplings.
The 0.005 and long tail pair bias R of 1M would give you a pole at 16
Hz
with no FB.
The FB then restores the bass response to get a pole which is lower,
but it shouldn't oscillate at LF with FB.
You might find that the trace on a CRO tends to bounce up and down
a bit with changing signal level, and the "margin of stability" isn't
too high.


Think about the elements of design at
http://www.turneraudio.com.au/htmlwe...0ulabinteg.htm

The arrangement of the input and driver tubes is basically the same as
the topology
you have chosen but there are some networks which improve the stablity.

Patrick Turner.



--
Kind regards,
Terry Judkins

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.796 / Virus Database: 540 - Release Date: 11/13/2004



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.796 / Virus Database: 540 - Release Date: 11/13/2004