>
>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?
>
>73 de Hans
>
The arcing on the Figure 23 bandswitch photo on my Web site shows that
arcing took place when the 80m Tune-C padder contacts were open -
meaning that the amplifier was in in use on another band (20m) when the
contacts were burned. Thus, 80m current can not have caused this damage.
Several SB-1000 owners have reported that when a burned Tune-C padder
switch wafer was replaced, intermittent arcing continued across open
contacts in the new switch. The fix was to decrease the VHF gain of the
3-500Z by decreasing the vhf Q of the vhf parasitic suppressor. .
cheers, Hans.
If you would like to receive a free-sample vhf parasitic suppressor
retrofit kit to try in the SB-1000, send me a postal address and I will
see to it that you receive one.
- Rich..., 805.386.3734, www.vcnet.com/measures.
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