Almarro has poping sound, please help


Recently, my Almarro 318B develop a loud "poop" sound. It is not very frequent. It is intermittent, usually have it after 15 mins or so after it is started. What should I do? I bought the unit used, and I have no history of the unit.
Should I take it to service, or should I try replacing the tube? Is there a way to find out if a tube gone bad? If I am to try replacing the tube, which one should I try first?
gte357s

Showing 1 response by mbleming

I've had an Almarro 318B for a few years now, and I've experienced popping on a number of occasions. Each time it ended up being a dying 6c33c tube...Ebay has decent prices, particularly when you buy a few at a time, but shipping to the US is pricey and I've been sent an entire order of DOA tubes (and didn't get a refund b/c I didn't test them quickly enough). Since then, I've had great results ordering from www.partsconnexion.com.