The data sheet for the chip gives some info on burst and pulse skipping modes.
I haven't studied it but I've seen such behaviour before.
Not sure it is the case here but probably worthwhile to take a look at it.
Jan
We made 5 pieces of V2 PCB.
Someone else asked for boards before.
So he'll get a pair for Beta test.
But then it seems he is not planning to build soon.
So if someone else is seriously interested and make a promise to build in the next month's, we'll order extra boards to support them.
You can send me a PM.
But only if you are serious about building.
Patrick
Someone else asked for boards before.
So he'll get a pair for Beta test.
But then it seems he is not planning to build soon.
So if someone else is seriously interested and make a promise to build in the next month's, we'll order extra boards to support them.
You can send me a PM.
But only if you are serious about building.
Patrick
Hi everyone,
Some years ago, I built a different version of the NEMESIS amp. It's a 14W class A amp inspired by the "NEMESIS COMPENSE" version. Instead of using N channel MOSFETs, I use N and P MOSFETs (2SK135 / 2SJ50) in a single ended arrangement (no phase splitter or differential stage) with a split primaries push-pull output transformer and bipolar PSU. The transformer is much easier to built and far cheaper (no air gap nor saturation), bandwidth is extended at both ends, ripple is nulled (no need for a regulated PSU). The MOSFETS are triode connected (see my article in "LA REVUE DU SON - 240". The amp is very simple, it uses 4 transistors per channel and is fully DC coupled up to the output trans. Additionally, the bias is optically DC servo assisted.
I think that if bipolar tubes had existed, this sort of circuit would have been in use long ago.
For those interested in the NEMESIS family and don't mind poor English ...
Some years ago, I built a different version of the NEMESIS amp. It's a 14W class A amp inspired by the "NEMESIS COMPENSE" version. Instead of using N channel MOSFETs, I use N and P MOSFETs (2SK135 / 2SJ50) in a single ended arrangement (no phase splitter or differential stage) with a split primaries push-pull output transformer and bipolar PSU. The transformer is much easier to built and far cheaper (no air gap nor saturation), bandwidth is extended at both ends, ripple is nulled (no need for a regulated PSU). The MOSFETS are triode connected (see my article in "LA REVUE DU SON - 240". The amp is very simple, it uses 4 transistors per channel and is fully DC coupled up to the output trans. Additionally, the bias is optically DC servo assisted.
I think that if bipolar tubes had existed, this sort of circuit would have been in use long ago.
For those interested in the NEMESIS family and don't mind poor English ...
Attachments
Here they are, hope they can be read. A typo : points 3 & 4 are inverted. Source of power MOSFETs (case) are directly connected to 0V which makes wiring and building the amp easier : no insulator needed and possible direct use of the chassis for cooling
Attachments
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