[Amps] Alpha 8100 - R9 meltdown

[gudguyham at aol.com]

That’s probably either a step start resistor or a glitch resistor.  I would have to look at the schematic.  Depending on which it is will depend on the nature of the fault.  In either case it could be a tube failure  a HV short to ground or a bad step start relay.  I’ll check the schematic.


Sent from the all new AOL app for iOS


On Thursday, February 8, 2024, 11:03 PM, David Propper <k2dp at charter.net> wrote:

Our Alpha 8100 has incurred a failure.  Currently have identified that R9 , a 25 ohm, 25 watt ceramic wire wound resistor has overheated and melted some of the ceramic coating. Has anyone seen this failure mode and if so, identified the root cause ?

Thank you,

Dave, K2DP
_______________________________________________
Amps mailing list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps