I've used the search, and looked through all the layout stickies I can find.
I've got a 4 noval 4 octal chassis, and I'd like to implement a dumbleator loop internal to the chassis.
Is there a layout for this type of amp available?
Thanks in advance.
Bob Simpson
Is there an ODS layout with an internal loop?
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Is there an ODS layout with an internal loop?
Please understand that IMO an answer to this question is of no practical relevance at all. - Max
Re: Is there an ODS layout with an internal loop?
This should help get you started.
http://ampgarage.com/forum/download/file.php?id=15497
(huge layout warning)
http://ampgarage.com/forum/download/file.php?id=15497
(huge layout warning)
Re: Is there an ODS layout with an internal loop?
Wow!
That drawing is 21" x 11.5"!
That drawing is 21" x 11.5"!
Tom
Don't let that smoke out!
Don't let that smoke out!
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Re: Is there an ODS layout with an internal loop?
the only issue is that the bias to the input of the (output) stage of the loop will have to be adjusted to accomodate a large clean signal, w/o clipping one side of the waveform, if u have a scope it will make the job easy--
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Re: Is there an ODS layout with an internal loop?
Thanks Chris
will be using this ASAP
butwhatif:
will be using this ASAP
butwhatif:
is this an easy adjustment without a scope?the only issue is that the bias to the input of the (output) stage of the loop will have to be adjusted to accomodate a large clean signal, w/o clipping one side of the waveform
Re: Is there an ODS layout with an internal loop?
Yes, just use your ears.
Tom
Don't let that smoke out!
Don't let that smoke out!
Re: Is there an ODS layout with an internal loop?
it's not that easy to do and get right by ear, there is substantial discussion about this in the forum, it's a matter of picking a resistor pair that creates somewhere betw 25-30vdc as cathode bias for the
output stage. easy to see with a sine wave + a scope ----check this thread
http://ampgarage.com/forum/viewtopic.ph ... ping#52983
I checked mine tonite and i have a 27k tail resistor -and it has +30vdc on the cathode. it passes all signals w/o any uneven clipping
output stage. easy to see with a sine wave + a scope ----check this thread
http://ampgarage.com/forum/viewtopic.ph ... ping#52983
I checked mine tonite and i have a 27k tail resistor -and it has +30vdc on the cathode. it passes all signals w/o any uneven clipping
Re: Is there an ODS layout with an internal loop?
Ok, I get what you are saying.
Yes, I remember when I built my dumbleator, the cathode follower cathode was supposed to be at around 30v.
Yes, I remember when I built my dumbleator, the cathode follower cathode was supposed to be at around 30v.
Tom
Don't let that smoke out!
Don't let that smoke out!