[poulsbobill]

Now, On start up i get a "blurp" sound (say it out loud---thats it)  after about 5 seconds and then the radio warms up and plays after about 15-20 seconds. I am also starting to get some distortion at the higher sound frequency's. (singing)  This has been hit and miss and less the longer the radio is on.

All this is new in the last 2 weeks.  The radio was recapped/resistored about 3 years ago by someone known to me to be reputable.  I play it about an hour every day.  I can hear something is going on, changing in the sound.  Yes this is AM radio and my reception varies greatly day to day but this is beyond that.

Since i believe the caps are ok and it does play well other that this occasional  higher frequency distortion/blurp, i am thinking a tube going bad?  

I dont have a tube tester.  All heaters are on, but i do have a few metal tubes.  They are warm,  not hot.
Start on the  Rf and Audio section?

http://www.nostalgiaair.org/Resources/199/M0013199.htm

Thanks

Bill