D3a Triode Square Wave shows HF boost

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Nick
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#16 Re: D3a Triode Square Wave shows HF boost

Post by Nick »

RhythMick wrote: ↑Mon Jul 26, 2021 9:32 pm Ok I see ... But there wasn't a blocking cap in the test circuit, either before or after the D3a.
How do you think the AC/DC input switch on the scope is done? I assumed you weren’t putting 150v or so into the scope input with it set to DC.
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RhythMick
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#17 Re: D3a Triode Square Wave shows HF boost

Post by RhythMick »

Nick wrote: ↑Mon Jul 26, 2021 10:59 pm
RhythMick wrote: ↑Mon Jul 26, 2021 9:32 pm Ok I see ... But there wasn't a blocking cap in the test circuit, either before or after the D3a.
How do you think the AC/DC input switch on the scope is done? I assumed you weren’t putting 150v or so into the scope input with it set to DC.
Doh
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Mike H
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#18 Re: D3a Triode Square Wave shows HF boost

Post by Mike H »

Image

Sure I've been caught out by similar in the past.
 
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