LND150 as a replacement in Cathodyne PI?
Moderators: pompeiisneaks, Colossal
LND150 as a replacement in Cathodyne PI?
I need some guidance in utilizing the LND150 mosfet as the phase inverter in my cathode biased Harvard style amp. My B+ is around 300v. I love tubes but I am open to experiment as I have a few of these in my parts bin.
Re: LND150 as a replacement in Cathodyne PI?
Good idea!
The absolute max gate to source voltage is listed as +/-20V.
A series reversed pair of 12V zeners might be used to ensure that.
https://ww1.microchip.com/downloads/en/ ... 041114.pdf
The absolute max gate to source voltage is listed as +/-20V.
A series reversed pair of 12V zeners might be used to ensure that.
https://ww1.microchip.com/downloads/en/ ... 041114.pdf
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Re: LND150 as a replacement in Cathodyne PI?
Here's a good thread on DIY Audio about it:
https://www.diyaudio.com/community/thre ... ne.290344/
Especially see the post #6 by tubelab_com
Edit: somehow hit submit on accident mid post.
~Phil
https://www.diyaudio.com/community/thre ... ne.290344/
Especially see the post #6 by tubelab_com
Edit: somehow hit submit on accident mid post.
~Phil
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Re: LND150 as a replacement in Cathodyne PI?
Here are a couple of them at 350V. I can re-design these for 300V and 220k grid leaks if you're actually interested.
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Re: LND150 as a replacement in Cathodyne PI?
This is always handy when working with LND150
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Re: LND150 as a replacement in Cathodyne PI?
Does the gate draw current at any point, ie akin to a forward biased grid?
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Re: LND150 as a replacement in Cathodyne PI?
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Re: LND150 as a replacement in Cathodyne PI?
Here is one for 300V and 220k grid leaks. Swings 60Vp in both directions, draws 1.18mA.
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Re: LND150 as a replacement in Cathodyne PI?
Please post your impressions of the changes in response, tone etc. Some pre and post clips might help you if the changes are subtle. Good luck!
Tube junkie that aspires to become a tri-state bidirectional buss driver.