>
>On Wed, 11 Mar 98 09:50:41 -0800 Rich Measures <measures@vc.net> writes:
>>>I was looking through the Amps archives and I noticed some comments
>>about
>>>damage to the 160-meter padding capacitor bandswitch contact due to
>>Heath not
>>>providing a
>>>corona washer.
>>Corona at 2800pV on a 5000pV capable bandswitch?
>>> Sure enough, my SB-1000 has a burned bandswitch contact in
>>>this place. I'd put off fixing it and attributed it to the former
>>owner's
>>>hot-switching...but maybe that isn't what happened after all.
>>The SB-1000 is essentially an AL-80, and whose replacement parts
>>happily
>>fit.
>>>Could someone please educate me with regard to this? What causes
>>this
>>>problem, and what kind of washer needs to be put where to prevent it?
>>
>>Replacing the
>>>contact is going to be annoying (I really don't want to replace the
>>whole
>>switch) and
>>>I only want to do it once!
>>Open160m tune padder switch contacts tend to arc during intermittent
>>vhf regeneration. at roughly 155MHz. .......
>VHF Parasitics...highly unlikely. ...
Carl: Please explain how the 100 ohm resistor in the vhf suppressor
becomes damaged by 80m RF during episodes of intermittent bandswitch
arcing?
thanks
cheers
Rich...
R. L. Measures, 805-386-3734, AG6K
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