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Help with a new Tube headphone amp blowing fuses

Received a new headphone amp this week to replace one from same manufacturer that is still serving me well but wanted to try a little more power, new amp 1.4 watts versus a .35 watt on the older one. Have about 25 hours on new amp and turned it on this morn loaded CD and after about a minute the music was replaced with an elevated fuzzy noise right before fuse blew, replaced fuse and it blew a second or two after turning unit on, saw nothing unusual going on with the tube glow, replaced New amp with the older amp in system and all is well. What are the possibilities of fault here, would like to handle myself without having to send back to Japan for warranty work.
tooblue
raindance
56 posts
 
OK, so you have a couple of options:
1. Have the manufacturer send you the part and have someone install it (like me). This assumes the diagnosis is correct.
2. Send it back. I am sure shipping is not a significant percentage of the cost of the unit.
3. Send it to me. It may take a while, as I have a real job :)

You could try Google translate to communicate with the factory. These guys have a reputation to uphold and they should work with you.

I don't know which transformer is evidently bad but a weird hissing noise sure sounded like a bad tube to me. 
raindance
56 posts
 
I sure wouldn't throw the thing away. What a waste.
tooblue OP
1,927 posts
 
Yeah I know Raindance, dealing with Yamamoto over the last 3 years has always been favorable and straight forward but never had an issue. I am going to beat my drum with the factory till I have exhausted that channel, just feel that something is going on there, it isn't business as usual. Will use you and others as my sounding board if you don't mind. I still have to the 23rd to file a claim with PayPal and will do that today.
atmasphere's avatar
atmasphere
11,800 posts
 
, just got my Yamamoto tube headphone amp back from the shop here in Houston and the diagnoses is that it has a bad transformer, that he could not get parts and that he would discard it for me and save me a trip.
Red Flag!

If the power transformer is bad, the manufacturer will want to see it! Any good technician would understand this, unless the unit is years old and out of warranty.
raindance
56 posts
 
Is there an update on the saga?
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