>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
>----------
>>FrÂn: measures <measures@vcnet.com>
>>Till: <rakefet@rakefet.com>, "sm5ki" <sm5ki@algonet.se>, "Amps reflector"
><amps@contesting.com>
>>?mne: Re: SV: [AMPS] UrgentSwedish questions
>>Datum: mÂn 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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