Re: Topband: Commond mode choke for Beverage

Thanks for this testing suggestiong Eddie, it will sure be a good way to check if it works or not. 73's Filipe Lopes CT1ILT - CR6K F4VPX - TM3M 2015-10-12 20:14 GMT+02:00 Eduardo Araujo : > >> With these ferrites I ask the same question, should I put the choke > close > >>

Re: Topband: Commond mode choke for Beverage

reading this guide. > > > > Regards > > JC > > N4IS > > > > *From:* Filipe Lopes [mailto:ct1...@gmail.com] > *Sent:* Monday, October 12, 2015 9:52 AM > *To:* JC <n...@comcast.net> > *Cc:* topBand <topband@contesting.com> > *Subject:* Re: Topb

Re: Topband: Commond mode choke for Beverage

Thanks for this grounding tip too Jim. 73's Filipe Lopes CT1ILT - CR6K F4VPX - TM3M 2015-10-13 4:03 GMT+02:00 Jim Brown : > On Mon,10/12/2015 1:27 PM, JC wrote: > >> It works like a voltage divider where the impedance to ground should be >> lower as possible to give

Re: Topband: Commond mode choke for Beverage

On Mon,10/12/2015 6:51 AM, Filipe Lopes wrote: With these ferrites I ask the same question, should I put the choke close to the 9:1 Balun or near the switching box and how many turns? some bevs have the feed point at +- 60m away from the switching box. Use the #31 material. Wind at least 20

Re: Topband: Commond mode choke for Beverage

On Mon,10/12/2015 5:45 AM, Filipe Lopes wrote: I am about to add a common mode choke to isolate the antenna from its feedline to each of my beverages and I only have FT240-61 ferrites. #61 is a terrible material for use as a common mode choke below 500 MHz. Try to find #31 or #43, and wind

Topband: Commond mode choke for Beverage

Hi guys, I am about to add a common mode choke to isolate the antenna from its feedline to each of my beverages and I only have FT240-61 ferrites. My question is how many turns should I do on the ferrite using RG58 (all my bevs are fed with RG58). Also should I put the choke near the 9:1 balun or

Re: Topband: Commond mode choke for Beverage

com> Subject: Topband: Commond mode choke for Beverage Hi guys, I am about to add a common mode choke to isolate the antenna from its feedline to each of my beverages and I only have FT240-61 ferrites. My question is how many turns should I do on the ferrite using RG58 (all my bevs are fed with RG58)

Re: Topband: Commond mode choke for Beverage

- Originalna poruka - Pošiljalac: JC <n...@comcast.net> Datum: Ponedeljak, Oktobar 12, 2015 15:40 Tema: Re: Topband: Commond mode choke for Beverage Primalac: 'Filipe Lopes' <ct1...@gmail.com>, 'topBand' <topband@contesting.com> > Hi Filipe > > Zero ,

Re: Topband: Commond mode choke for Beverage

rom: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Filipe > Lopes > Sent: Monday, October 12, 2015 8:46 AM > To: topBand <topband@contesting.com> > Subject: Topband: Commond mode choke for Beverage > > Hi guys, > > I am about to add a common mode choke to isolat

Re: Topband: Commond mode choke for Beverage

, VE3EA - Originalna poruka - Pošiljalac: Filipe Lopes <ct1...@gmail.com> Datum: Ponedeljak, Oktobar 12, 2015 15:52 Tema: Re: Topband: Commond mode choke for Beverage Primalac: JC <n...@comcast.net> Cc: topBand <topband@contesting.com> > Hello JC, > > Thanks f

Re: Topband: Commond mode choke for Beverage

>> With these ferrites I ask the same question, should I put the choke close >> to the 9:1 Balun or near the switching box and how many turns? some bevs >> have the feed point at +- 60m away from the switching box. My two cents..It was interesting during the installation of the last

Re: Topband: Commond mode choke for Beverage

Thanks Jim and all for the help. Mix #31 cores are already ordered in mouser. 73's cu on low bands Filipe LOPES CT1ILT CR6K Sent from my SAMSUNG GALAXY S4 Em 12/10/2015 17:39, "Jim Brown" escreveu: > On Mon,10/12/2015 6:51 AM, Filipe Lopes wrote: > >> With these

Re: Topband: Commond mode choke for Beverage

will be a specialist after reading this guide. Regards JC N4IS From: Filipe Lopes [mailto:ct1...@gmail.com] Sent: Monday, October 12, 2015 9:52 AM To: JC <n...@comcast.net> Cc: topBand <topband@contesting.com> Subject: Re: Topband: Commond mode choke for Beverage Hello JC,

Re: Topband: Commond mode choke for Beverage

Eduardo Araujo via Topband wrote: > My two cents..It was interesting during the installation of > the last beverage, we have only #31 core, so we placed it at the > receiver side. Disconnecting the coax at the bev feed point and > shorting the coax there, many AM

Re: Topband: Commond mode choke for Beverage

On Mon,10/12/2015 1:27 PM, JC wrote: It works like a voltage divider where the impedance to ground should be lower as possible to give you more attenuation like 1k/500ohms versus 1K/5 ohms divider. Yes. But to expand on this -- often the interference is coupled into a gain stage or RX by