Cathode resistor and IM distortion

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maxkracht
Posts: 595
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Location: Iowa, USA

Re: Cathode resistor and IM distortion

Post by maxkracht »

Are you sure the noise is coming from the power amp? Maybe you are getting partial cancellation of the noise when running PP. Any schematic/pictures of the amp?
mike-p
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Joined: Fri Mar 17, 2023 4:55 pm

Re: Cathode resistor and IM distortion

Post by mike-p »

Hmm that's an interesting idea. It is definitely intermodulation distortion. Leaving a low string ringing and then bending notes above it you can hear the low harmonic out of tune bending in the opposite direction.
mike-p
Posts: 41
Joined: Fri Mar 17, 2023 4:55 pm

Re: Cathode resistor and IM distortion

Post by mike-p »

maxkracht wrote: Tue Feb 13, 2024 6:42 pm Are you sure the noise is coming from the power amp? Maybe you are getting partial cancellation of the noise when running PP. Any schematic/pictures of the amp?
Tried to pm you but its stuck in my outbox?
maxkracht
Posts: 595
Joined: Tue Dec 10, 2019 7:18 pm
Location: Iowa, USA

Re: Cathode resistor and IM distortion

Post by maxkracht »

I'm an idiot, share pictures on here so the smart kids can help.
mike-p
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Re: Cathode resistor and IM distortion

Post by mike-p »

Is this local negative feedback increasing headroom or that my imagination?
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Phil_S
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Re: Cathode resistor and IM distortion

Post by Phil_S »

mike-p wrote: Tue Feb 13, 2024 7:53 pm Tried to pm you but its stuck in my outbox?
For better or worse, it remains stuck until the recipient reads it. <shrug>
sluckey
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Re: Cathode resistor and IM distortion

Post by sluckey »

Phil_S wrote: Thu Mar 14, 2024 1:48 pm
mike-p wrote: Tue Feb 13, 2024 7:53 pm Tried to pm you but its stuck in my outbox?
For better or worse, it remains stuck until the recipient reads it. <shrug>
It's not really stuck. That's a feature that tells you the message has not been read. I like that feature.
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Colossal
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Re: Cathode resistor and IM distortion

Post by Colossal »

sluckey wrote: Thu Mar 14, 2024 3:14 pm
Phil_S wrote: Thu Mar 14, 2024 1:48 pm
mike-p wrote: Tue Feb 13, 2024 7:53 pm Tried to pm you but its stuck in my outbox?
For better or worse, it remains stuck until the recipient reads it. <shrug>
It's not really stuck. That's a feature that tells you the message has not been read. I like that feature.
The bummer is that the forum software no longer sends out notifications to one's email account notifying them that they have a PM. Or if it does work, it's a very rare fluke. Our former, intrepid sysop could never make any headway with the site owner to do an upgrade, so, here we are...
sluckey
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Joined: Sun Jul 22, 2007 7:48 pm
Location: Mobile, AL
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Re: Cathode resistor and IM distortion

Post by sluckey »

I have never relied on email notifications for PMs. Anytime I send a PM I will be frequently checking on the forum.
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