I also have a very nice palomar 300A with power supply it needs 2 tubes..has 6lf6's and 2 were shorted so i threw them away ..Still see 300 watts even with 2 of them gone..Needs ssb/am switch replaced ..Other than that it's all good..great pre amp no relay issues..Power supply has new caps and diodes installed..Has the plug in relay board..Taking offer's..will upload photo's soon very nice looking amp