[Amps] Tips For Winding a Plate Choke

[Carl]

It is 200W period in the USA, no SSB or AM allowed; only CW, and data.

I have no idea if my 76PA works there and dont care either.

As far as 160 Ive put that choke in several Amp Supply LK-800A's as well as 
the souped up ones with 3CPX tubes and the LK-550 external transformer. 
Later transformers had both voltages available.

No heating problems when testing into my BIG BIRD load on CW and SSB.

Carl


----- Original Message ----- 
From: "Artek Manuals" <Manuals at ArtekManuals.com>
To: <amps at contesting.com>
Sent: Thursday, October 10, 2019 9:01 AM
Subject: Re: [Amps] Tips For Winding a Plate Choke


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
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-- 
Dave
Manuals at ArtekManuals.com
www.ArtekManuals.com


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