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101. Re: [Amps] Acceptable ripple on high voltage plate power supply in tetrode amplifiers. (score: 1)
Author: David G4FTC <g4ftc@hotmail.com>
Date: Sun, 22 Dec 2024 23:14:47 +0000
I've been following this thread with interest. Could I suggest listening to your own transmitted signal on a local WebSDR? You can then assess if the ripple is excessive or not. Regards David G4FTC S
/archives//html/Amps/2024-12/msg00040.html (12,684 bytes)

102. Re: [Amps] Acceptable ripple on high voltage plate power supply in tetrode amplifiers. (score: 1)
Author: David G4FTC <g4ftc@hotmail.com>
Date: Tue, 24 Dec 2024 14:41:49 +0000
Hi Michael, All understood. It was just that I hadn't seen anyone make a mention of WebSDRs, so I thought it may be a helpful reminder. I find WebSDRs very useful for both own signal monitoring and a
/archives//html/Amps/2024-12/msg00045.html (16,254 bytes)

103. Re: [Amps] Acceptable ripple on high voltage plate power supply in tetrode amplifiers. (score: 1)
Author: David G4FTC <g4ftc@hotmail.com>
Date: Wed, 25 Dec 2024 13:28:21 +0000
Hi Lukasa, The choke - capacitor arrangement is typical in Switched Mode Power Supplies. Ripple can be reduced to very low figures by a suitable combination of L and C. There are trade-offs between a
/archives//html/Amps/2024-12/msg00047.html (19,608 bytes)

104. Re: [Amps] Acceptable ripple on high voltage plate power supply in tetrode amplifiers. (score: 1)
Author: David G4FTC <g4ftc@hotmail.com>
Date: Wed, 25 Dec 2024 14:52:26 +0000
I have just looked up the filter arrangements for my RF104. It comprises of an 8H choke with a 6uF capacitor. But this is for a single phase supply as opposed to your 3 phase supply. To stabilise the
/archives//html/Amps/2024-12/msg00048.html (20,816 bytes)


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