[Amps] Tips For Winding a Plate Choke

[Martin Sole]

Hi,

Yes, understood it is 200 watts in US, here it is 1kW for advanced 
licence with high power permit hence the interest. I wonder if anyone 
has done any work on a suitable choke for true 160-10 operation (9 band)?

Martin, HS0ZED



On 10/10/2019 20:01, Artek Manuals wrote:
> I believe you will find the US regulation is 200W PEP on 30M , 
> according to the ARRL band plan cheat sheet I have, no difference in 
> the context of this discussion however
>
> Dave
> NR1DX
>
> On 10/10/2019 8:27 AM, Jim wrote:
>> We can't run more than 100 watts on 10 MHz in the USA. So no need to 
>> have it work there.
>>
>>
>> Thanks
>> 73
>> Jim W7RY
>>
>> On 10/9/2019 8:35 PM, Martin Sole wrote:
>>> Carl,
>>>
>>> Did you notice any effect on 10MHz. When I put an Ameritron choke in 
>>> my 78, which I agree fits just fine, it was okay but went bang on 
>>> 10Mhz. Had I the time then I would have investigated moving it to 
>>> resonate somewhere else but in stock form mounted in the 78 I 
>>> measured resonance at 10.5MHz, too close to 10.1MHz to work I think.
>>>
>>> As a more general question, where would be good to place a single 
>>> choke for 160-10 9 band coverage, around 12 MHz?
>>>
>>> Martin, HS0ZED
>>>
>>>
>>>
>>> On 10/10/2019 08:04, Carl wrote:
>>>> Ive had no problems from squeezing the Ameritron choke into Alpha 
>>>> 76/78's etc which is about as tight as you can get.
>>>>
>>>> Carl
>>>>
>>>>
>>>>
>>>> ----- Original Message ----- From: "Jim Thomson" <jim.thom at telus.net>
>>>> To: "Roger - W7TZ" <ai7rogerroger at gmail.com>; <amps at contesting.com>
>>>> Sent: Tuesday, October 08, 2019 5:08 PM
>>>> Subject: Re: [Amps] Tips For Winding a Plate Choke
>>>>
>>>>
>>>>> ##  They  can  be  mounted  either vertically or  horizontally,  
>>>>> both mounting schemes  work.
>>>>> Typ  vert  mounting  is  used.   Either way B+  has  to be fed  to 
>>>>> the base  of  the plate  choke.
>>>>> Also,  bypass  caps have  to  be  installed  at  base  of plate 
>>>>> choke. Also,  you  dont  want  to  mount
>>>>> a plate  choke parallel to a sidewall,  nor  the  chassis. The  
>>>>> stray  C will  screw  up  the  choke,
>>>>> and  shift  its  series resonances...  down  in  freq.... which  
>>>>> could easily  cause catastrophic results.
>>>>> If  you  do mount  parallel  to sidewall or  chassis, choke should 
>>>>> be  at least  3 x its  diameter away
>>>>> from  surrounding  metal.  Vert  mounting  solves  these issues.
>>>>>
>>>>> Jim  VE7RF
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> From: Roger - W7TZ
>>>>> Sent: Monday, October 7, 2019 9:14 AM
>>>>> To: amps at contesting.com
>>>>> Cc: Jim Thomson ; MU 4CX250B
>>>>> Subject: Re: [Amps] Tips For Winding a Plate Choke
>>>>>
>>>>> Out of curiosity, is there a particular reason that HV chokes are 
>>>>> typically mounted vertically and not horizontally?
>>>>>
>>>>> 73, Roger
>>>>> W7TZ
>>>>> CN83ia
>>>>> Grid Busters
>>>>> w7tz.webs.com
>>>>>
>>>>>
>>>>> On Mon, Oct 7, 2019 at 8:57 AM MU 4CX250B <4cx250b at miamioh.edu> 
>>>>> wrote:
>>>>>
>>>>>  Oops, I meant 1rps, not 1rpm!
>>>>>  Jim w8zr
>>>>>
>>>>>  Sent from my iPhone
>>>>>
>>>>>  > On Oct 7, 2019, at 9:50 AM, Jim Thomson <jim.thom at telus.net> 
>>>>> wrote:
>>>>>  >
>>>>>  >
>>>>>  > ##  1  rpm  is  too  slow....it  will  take  forever to 
>>>>> wind.    30-60 rpm  works  good.
>>>>>  > A  slowed  down  drill  press  will  also work
>>>>>  _______________________________________________
>>>>>  Amps mailing list
>>>>>  Amps at contesting.com
>>>>>  http://lists.contesting.com/mailman/listinfo/amps
>>>>> _______________________________________________
>>>>> Amps mailing list
>>>>> Amps at contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/amps 
>>>>
>>>>
>>>> ---
>>>> This email has been checked for viruses by AVG.
>>>> https://www.avg.com
>>>>
>>>> _______________________________________________
>>>> Amps mailing list
>>>> Amps at contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>
>> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>