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#1
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Balun Toroids?
Does anyone know if the toroids in pc power supplies would be suitable
for low power balun experiments for up to 30MHz? Thanks, Adrian. |
#2
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mustang wrote:
Does anyone know if the toroids in pc power supplies would be suitable for low power balun experiments for up to 30MHz? If they are the toroids used in the switching power supply as transformers, they are not very good for RF. They are probably powdered iron cores optimized for a frequency like 400 Hz. Most baluns use ferrite toroids optimized for a range of RF frequencies. -- 73, Cecil http://www.qsl.net/w5dxp -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#3
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The basic frequency of SPSU is usually in the range of 40 - 60 kHz. I
see no reason why the cores should be optimized for 400 Hz. Moreover, the waveforms in SPSUs are rich of harmonics. According to Miro OM3CKU at http://www.cq.sk/modules.php?name=Ne...e=print&sid=53 , the transformer toroid cores from PC SPSUs are suitable in HF baluns up to 150 watts and in ATUs up to at least 50 watts. 73 Ivan OK1SIP Cecil Moore wrote in message ... mustang wrote: Does anyone know if the toroids in pc power supplies would be suitable for low power balun experiments for up to 30MHz? If they are the toroids used in the switching power supply as transformers, they are not very good for RF. They are probably powdered iron cores optimized for a frequency like 400 Hz. Most baluns use ferrite toroids optimized for a range of RF frequencies. |
#4
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The pot cores used in some of our equipent run 100W at 220kHz....
"OK1SIP" wrote in message om... The basic frequency of SPSU is usually in the range of 40 - 60 kHz. I see no reason why the cores should be optimized for 400 Hz. Moreover, the waveforms in SPSUs are rich of harmonics. According to Miro OM3CKU at http://www.cq.sk/modules.php?name=Ne...e=print&sid=53 , the transformer toroid cores from PC SPSUs are suitable in HF baluns up to 150 watts and in ATUs up to at least 50 watts. 73 Ivan OK1SIP Cecil Moore wrote in message ... mustang wrote: Does anyone know if the toroids in pc power supplies would be suitable for low power balun experiments for up to 30MHz? If they are the toroids used in the switching power supply as transformers, they are not very good for RF. They are probably powdered iron cores optimized for a frequency like 400 Hz. Most baluns use ferrite toroids optimized for a range of RF frequencies. |
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