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Responses from transl

Noise upon pre-amp tube replacement
This is an integrated amp. This problem did not appear again. 
Noise upon pre-amp tube replacement
It was a single "thump" but then everything worked OK. There was no need even to swap the tubes from side to side. 
Second failure of new amplifier
I wrote - Nightingale. 
Microphonic tubes or amplifier glitch?
Thank you! 
Second failure of new amplifier
The manufacturer's name transpires from the previous posts, so this thread is not a speculation.Here is the response I received from the manufacturer:'I understand your disappointment for a malfunction of a new equipment. But let me tell you that ... 
Second failure of new amplifier
Perhaps. 
Second failure of new amplifier
Amp failure update:Yesterday I received an octet of brand new NOS/NIB TungSol 5881 tubes (60s vintage). Trembling with fear, I inserted them in proper positions and listened for a couple of hours. Even in half an hour, the sound was fantastic. I s... 
Second failure of new amplifier
I want to thank all guys for compassion and understanding. I haven't decided yet what to do - the dealer keeps (and will obviously continue to keep) silent, while the amp is working OK with the stock tubes, except that I installed the Mullard CV41... 
Second failure of new amplifier
Neswbee: - I was not given a warranty and I don't know what it says. The dealer, or, rather, the distributor, prefers not to give a warranty saying "I myself am a warranty". Perhaps he wants to conceal the original price by all means and to preven... 
Second failure of new amplifier
Gs5556:'Curious... why use the standby switch to power down?' - how can I avoid the standby switch? Shall I make two quick clicks - standby and then immediately to the "off" position?By the way, the amp is working now. I replaced the fuse and inst... 
Second failure of new amplifier
OK. To resolve the second failure, I replaced the fuse and installed the stock pre-amp tubes. The amp sounds terrific, by the way (which makes me think that some modern amplifiers are optimized for modern tubes - if you replace them with NOS tubes... 
Second failure of new amplifier
This is a question of dishonest dealer, for sure. If I were in his place, I would make my best to maintain good reputation. 
Question to 6L6 tube experts
Arthur: My amp is Nightingale ADM-35 integrated (www.nightingale.it) powered with eight Sovtek 5881/6L6WGC tubes. 
Question to 6L6 tube experts
Thanks guys! 
New Nightingale CTR 2 loudspeakers
I got them and don't regret.