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Responses from invalid

Class D amps seem poised to take over. Then what?
Class D amps can sound good, you just have to put a tube dac and tube preamp in front of them. 
Need a DAC Recommendation.
The tube in the Border Patrol is part of the power supply, not the audio signal path.The border patrol has a tube rectifier, so you are correct.  
First tube preamp recommendations (under $5k)
New:  Audible Illusions M3BDoes this preamp burn through tubes fast like the older model audible illusions preamp did? 
Tube buffer in tape loop@
If the buffer makes listening more enjoyable then why not. 
Can the Same Brand Power Tubes Have a Different Sound When Bought From Different Vendors?
No USA and UK production tubes for decades! Same for Western EuropeThere are new high quality tubes being made in Europe from a manufacturer called ELROG. 
SET vs OTL
Could a DC offset protection circuit be used to make a OTL SET? 
First tube preamp recommendations (under $5k)
I've heard bad circuit designs with great parts sound bad, I've heard great circuit designs sound great with cheap parts. I agree that a great circuit design with great parts will sound even better, but this forum isn't to sell your services. 
Do I NEVER shut it off…?
regulated power supply, an amp can be turned off. I think you mean a soft start circuit, not a regulated power supply two very different circuits that do two very different things. 
First tube preamp recommendations (under $5k)
invalid I talked to the space tech labs guy and the 1 thing I didn't like he wasn't willing to show me the internals (he claims since he doesn't want people to copy him). Its something I don't like about mcintosh either.Most audiophiles don't even... 
What ever happened to Mark Levenson?
was thinking more Heinrich Hertz... He claims Heinrich Hertz is a distance relative. I think on his mother's side.  
First tube preamp recommendations (under $5k)
None of the Tech is cheap either.. BUT Art can be expensive, AY?It's not cheap, but it's way cheaper than the big name brands top of the line components. 
First tube preamp recommendations (under $5k)
A winning circuit design will sound better with cheap parts than a average circuit design with top notch parts. 
First tube preamp recommendations (under $5k)
Since you mention Don, his preamp would be a contender at far below 5K.It is definitely worth the money, but I don't believe it would compete with the higher end model space tech labs stuff. 
First tube preamp recommendations (under $5k)
Don SachsDon Sachs used to own one of space tech labs preamps, I believe it was the last preamp he sold after he started making his own, he only had one of the middle of the road space tech preamps. 
First tube preamp recommendations (under $5k)
BIG valve preamps are gonna be 'ALL THAT" soon enough..The big valves are only part of it, he uses ac heaters, which sounds a little warmer, but not too warm, and true point to point wiring. Some manufacturers use hand wiring, but not true point t...