[Amps] Ameritron Amps

[Dick Knol]

Corona is observed with 1100 watt input @ 3600 KHz on the 3 mm diameter tip 
of the whip.
The corona discharge causes blue ionized flames approx. 2-4 inch long. The 
discharge happens with a cracking sound in the rhythm of the SSB voice 
peaks.  Placing a 1 inch aluminium ball on top of he whip stops the corona 
discharge.

Cheers, Dick
PA3DUV

----- Original Message ----- 
From: "R L Measures" <r at somis.org>
To: "PA3DUV" <pa3duv at planet.nl>
Cc: <amps at contesting.com>
Sent: Monday, August 07, 2006 3:01 PM
Subject: Re: [Amps] Ameritron Amps


> Do you see corona, Dick?
>
> On Aug 6, 2006, at 1:48 PM, PA3DUV wrote:
>
>> The loading coil of my HiQ 5-160 centerloaded vertical has an  impedance 
>> of
>> 10 + J 3494 ohms
>>
>> @ 1200 watt (f=1.9 MHz) input at the antenna feedpoint the voltage  over 
>> the
>> loading coil is 29 910 volt and the current 8.56 A.
>>
>> Cheers, Dick
>> PA3DUV
>>
>>
>> ----- Original Message -----
>> From: "Tom W8JI" <w8ji at w8ji.com>
>> To: "PA3DUV" <pa3duv at planet.nl>; <amps at contesting.com>
>> Sent: Sunday, August 06, 2006 8:37 PM
>> Subject: Re: [Amps] Ameritron Amps
>>
>>
>>>> Polycarbonate seems to perform well at both low and high  frequencies.
>>>> @ 1.2 kW input in my center loaded mobile vertical the Lexan  loading 
>>>> coil
>>>> tube with internal helix groove where the coil wire is embedded  works
>>>> very
>>>> well in mobile SSB service. I guess that sort of plastic could be  used 
>>>> in
>>>> tuners and amplifier
>>>
>>> Almost all "problems" with dielectrics come from use in capacitors or
>>> insulation applications with concentrated electric fields in
>>> high-impedance areas.
>>> I can't understand why people seem to keep right on thinking a 
>>> dielectric
>>> with a high dissipation factor at a certain frequency can't be  used as
>>> insulation on that frequency.
>>>
>>> This was covered very well a few weeks ago.
>>>
>>> There is a lot more that goes into it than dissipation factor, as  a 
>>> matter
>>> of fact that often is one of things that doesn't even influences
>>> dielectric selection.
>>>
>>> If I was building a solid dielectric transmission line or a  capacitor, 
>>> I'd
>>> worry about electrical characteristics. If I was building a coil 
>>> support
>>> or  insulating support posts, it would probably be one of the  things I
>>> worried about the very least.
>>>
>>> 73
>>> Tom
>>>
>>
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>>
>
> R L MEASURES, AG6K. 805-386-3734
> r at somis.org
>
>
>