Thanks John for your very good information. I indeed missed the part
about the fault 99 and the 6 tries, your out deal. But I did read the
rest of the manual. Checking the AC main prior to hookup, I measured
230 volts +/- 5 volts. I left the tap at 240 volts. Was this an error
? Should I have moved the tap to 220 volts ??? After resetting the
microprocessor, I tried again, this time looking directly at the
segment lights and with the terminal on. It again failed and shut off
immediately - no indication on the segment lights was given and the
terminal program returned no useful information.
I, like you, think I might have erred on the tap setting. I will
re-evaluate and discuss with Glenn tomorrow.
Thanks again,
Jamie WB4YDL
On Sunday, February 2, 2003, at 10:06 PM, W0UN--John Brosnahan wrote:
> Jamie--
>
> It's unfortunate that you did not read the manual in more detail.
>
> When the 87A shuts down it stores a fault code as is described
> in the manual. The next time you turn the 87A it will flash the
> fault code on the front panel LEDs--giving you some idea of what the
> problem is and allowing you to correct it before you try running the
> amplifier again.
>
> If you continue to ignore the fault code without correcting the
> problem the 87A will finally go to fault 99 to protect itself from
> just this type of action, ie--not correcting the fault and repeatedly
> trying to operate the amp.
>
> Now that it is giving you the 99 error code you have no information
> on the cause of the problem and no way to remedy the problem
> without contacting CrossLink.
>
> This is only a guess--but one possible scenario is that the transformer
> taps were not set properly for your AC mains voltage. When you
> operated the amp the first time the AC mains was barely within the
> acceptable range and when you came back hours later the line
> voltage may have changed for whatever reason. Operating outside of
> the proper tap setting can greatly reduce tube life due to unacceptably
> high or low filament voltage. The 99 fault may have just saved you
> $800 in tubes. Of course this is just one possible scenario--but one
> I feel is likely because the amp faulted immediately, without
> application
> of RF drive.
>
> Contact Glenn at CrossLink and he should be able to walk you
> through the problem. In the meantime you should read the section
> in the manual on fault codes and probably double check your line
> voltage and the tap settings.
>
> Next time it faults, for whatever reason, make sure you determine
> the fault code and take corrective action before repeatedly trying
> to power up the amp.
>
> Your wallet will appreciate your efforts! ;-)
>
> 73--John W0UN
>
>
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