SV: SV: [AMPS] UrgentSwedish questions

[measures]

>No, the only burned contacts are the ones connecting the padder condenser.
>RFC at the output is 105 ohms which is normal. And the air-gap 7 to 9 is
>very big - no flash over here. 
>
>I will try to grid-dip the lead to the padder condenser and also the
>filament choke. If there are any common dip frequencies, we have the
>flash-over reason  there. Then, there are two solutions: accept RICHs kind
>offer 

This was certainly not a kind offer, Hans.  It was a cheap-ass ploy to 
get free advertising for our suppressor retrofit kits.  

>and try his parasitic choke or a simpler one: instead of connecting
>the padder with a straight wire to the switch as it is done now, 

My guess is that the self resonance in the open 160m  Tune-padder circuit 
is  above the most likely parasitic freq of c 150MHz.  Also check the dip 
at the DC Blocking C 


>increase its inductance and convert the wire into a small coil. Eventually 
this could
>move the anode dip frequency slightly away from the common  frequency of the
>naughty  little tptg oscillator. And fix the problem. If it exists, hi!
>
It surely exists.  The open switch contacts have a 2000v safety margin 
and should not arc unless the antenna is breaking down.  

cheers, Hans
>----------
>>FrĀn: measures <measures@vcnet.com>
>>Till: <rakefet@rakefet.com>, "sm5ki" <sm5ki@algonet.se>, "Amps reflector"
><amps@contesting.com>
>>Ÿmne: Re: SV: [AMPS] UrgentSwedish questions
>>Datum: mĀn 24 jan 2000 15.00
>>
>
>>
>>>
>>>sm5ki wrote:
>>>> 
>>>> I still think it is the current because BOTH switch contacts are burned 
and
>>>> there can not be any flash-overs beetween an already grounded switch 
contact
>>>> and ground? Or am I wrong?
>>>
>>>If I'm not mistaken, contact no. 9 goes to the padder capacitor.  The 
>>>other side
>>>of the padder goes to the plate.  This is the high potential point.  
>>>Contact no.
>>>7 is grounded.  The arc can be from contact 9 to ground (burning just 
contact
>>>9), or contact 9 to contact 7 (burning both of them).
>>>
>>indeed, Vic,
>>
>>-  Rich..., 805.386.3734, www.vcnet.com/measures.  
>>
>>
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>>
>


-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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