Philippe, Maybe you can at least do a process of elimination first before having someone come look at it.
For instance: 1. On what band(s) do you hear the noise? 2. Where did you put the ferrites? On 3 wire 240VAC to the outside unit? On the inside unit? On the 24VC thermostat wires? 3. How is the unit grounded? Do you know if noise emanates from outside unit? Inside unit? Smart thermostat? 4. What does the noise sound like? Continuous wide spectrum? Or intermittent spikes? Synched to 60Hz? Describe? Do you have a spectrum/waterfall image of it? ROD / W5IE Rod Neumann cell: (832)444-0192 ALLogic Inc. / AdorStore PO Box 217 New Ulm, TX 78950 On Mon, Aug 9, 2021 at 11:53 AM K5BOU-Philippe via BVARC <[email protected]> wrote: > Hi, > > Anyone can recommended a tech who know working on A/C and RFI noise . > > Currently I get bad noise trough my end-fed antenna when my A/C turn on. > We try ferrite choke for Palomar engineering without success. > > Thanks. > > > > K5BOU-PhilippeBoucaumont > > Houston*|*Texas*|*USA*|* > > > > https://mccrarymeadowsweather.com/ > > > > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free. > www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > <#m_484040871761957903_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/[email protected]/ >
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