[FQP] [FCG] FQP Mobile antennas

Sun Apr 8 10:11:18 PDT 2018

Chris:
I agree with your comment about putting chokes on the 12 volt line.  
However, type 31 is not the best material in this case.  I actually use 
the chokes advertised on the N8XJK super booster web site for the 12 
volt application.  Made a huge difference in getting rid of noise coming 
in on the dc line.

73 charlie, k1xx

On 4/8/2018 1:04 PM, Christopher Blake wrote:
> Hi Jeff,
> I suggest placing the ferrite chokes as close to the antenna as possible;
> run the coax along the roof after that until it connects to go inside the
> cab.
> Chokes also can help at the power supply (near the output) particularly if
> it is a switching power supply.
> I also have more chokes handy in case we need them near the PC's power
> supply.
>
> Hope this helps.
>
> vy 73,
> Chris, NX4N
>
>
> On Sun, Apr 8, 2018 at 12:55 PM, Jeff Clarke <ku8e at ku8e.com> wrote:
>
>> Jim,
>>
>> What type of ferrite core do you use for your common mode choke? I have a
>> bunch of the DX Engineering snap-on ferrite beads (Type 31). Will those
>> work? Do you put it near the antenna or the coax that goes into the radio?
>> We have about a 6 foot run of RG8X from the actual antenna to the radio.
>>
>> Every year it seems like we have always have problems on 40 meters with
>> the computer locking up at some time from stray RF.
>>
>> Jeff
>>
>>
>> On 4/8/2018 12:22 PM, Jim Stahl wrote:
>>
>> Does the antenna check out normally on an antenna analyzer? Can you run low power without the radio going crazy?
>>
>> You might also consider, if you haven’t already done so, a common mode choke at the antenna feedpoint. That is, wrapping several turns of coax around an appropriate ferrite core. K9YC has written extensively on this. It may be more of a bandaid (sorry, bad pun) than the real fix, but it might get you the few db edge needed to make the radio happy.
>>
>>
>> 73  -  Jim   K8MR
>>
>>
>>
>>
>> On Apr 8, 2018, at 10:17 AM, Jeff Clarke <ku8e at ku8e.com> <ku8e at ku8e.com> wrote:
>>
>> Might be your grounding. If you are using Hustler mobile whips they are very sensitive to this. John is coming over my house today and we are testing ours out.
>> Jeff
>>
>>
>> Jeff ClarkeInformation Technology Professional Ellerslie, Georgiahttp://www.ku8e.comhttps://www.linkedin.com/in/jeffrey-clarke-ga
>>
>> -------- Original message --------From: Christopher Blake <cqdenx4n at gmail.com> <cqdenx4n at gmail.com> Date: 4/8/18  6:40 AM  (GMT-05:00) To: Edward <edkn4y at embarqmail.com> <edkn4y at embarqmail.com> Cc: k1knq at aol.com, Florida Contest Group <fcg at kkn.net> <fcg at kkn.net>, FQP <fqp at kkn.net> <fqp at kkn.net> Subject: Re: [FQP] [FCG] FQP Mobile antennas
>> Ed- Yikes!
>> Perhaps it's the mount itself?  Maybe you can try moving the 20m resonator
>> to a different mounting spot?
>> Can't imagine the thought of no 20m!!!
>>
>> please keep us posted; good learning opportunity for all of us.
>>
>> GL OM/73,
>> Chris, NX4N
>>
>> ps- any fixed/portable station projects out there?
>>
>>
>> On Sat, Apr 7, 2018 at 11:55 PM, <edkn4y at embarqmail.com> <edkn4y at embarqmail.com> wrote:
>>
>>
>> I feel the pain, I installed my resonators on the van. transmitted on 10,
>> 15, 40, 80 but when I transmitted on 20 meters the radio went crazy. I
>> ordered a new resonator to be here Monday. I hope this is the problem, or I
>> do the QSO party on 10,15 and 40. Never had this problem before, might be
>> the new GMC van. Hope not.
>> Ed KN4Y
>> ----- Original Message -----
>> From: K1KNQ via FCG <fcg at kkn.net> <fcg at kkn.net>
>> To: fcg at kkn.net, fqp at kkn.net
>> Sent: Sat, 07 Apr 2018 13:13:36 -0400 (EDT)
>> Subject: [FCG] FQP Mobile antennas
>>
>>
>> Ok, I get it, the Gods of mobile operation just don't like me....
>> Worked yesterday and today putting my mobile antennas back on the car.
>> Same position and same antennas as last few years.
>> Everything nicely matched last year.
>> Completely  different this year. 1 to 2 inches shorter on the whips!!!
>> Same everything including coax lengths, switching etc.
>> It must be the either car or operator is getting old.
>>
>> Anyway Done...
>>
>> 73
>> Jack K1KNQ
>> aka K4FCG/M
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>> --
>> *Jeff Clarke*
>> Information Technology Professional
>> Ellerslie, Georgia
>>
>> My LinkedIn Profile <https://www.linkedin.com/in/jeffrey-clarke-ga>
>>
> _______________________________________________
>
> This list is NOT moderated.  Any messages stating the contrary, is a software glitch.
>
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