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That sounds just like Tim.

Now work through this assuming the user has a balanced power conditioner or is using an isolation transformer. Neither of these scenarios is particularly unlikely.

I did receive mine!

No, that was a pleasant surprise to say the least.

Someone classed it up for me.

I have given it a week since I received the receipt.

If the music you listen to is Switch on Bach or even just organ music in general, the delineation between power with music and continuous sine wave power into a resistor are not separated by much.

I did receive an e-mailed receipt for the refund on the first of February, so I don't think it was an issue of inspecting the goods.

Tomorrow I will be contacting my credit card company to dispute the charge for this amp. The return was received on the 28th and a refund was promised (with official looking paperwork), but it hasn't materialized.

There are three of us who have tested these amps and gotten similar results. How many different people do you need to test one of these in order to satisfy your curiosities?

One of the two.

This was as dealt with in the first two amps I measured in the first thread, but it keeps getting brought up for some reason. I measured these amps both ways and they are slightly worse when you measure them the way Bob says to. Do keep in mind that Bob does not dispute any of the measurements...

I have not measured an MC-100B, but it sure looks about the same on the inside as the one I measured.

The #45 amp made its power but had one filament winding shared between the tubes with cathode bias, so crosstalk was problematic. The preamp had sufficient noise issues that I had to convert the tube heating to DC to get it quiet. I remember the 807 amp not making nearly the power claimed...

I have had an Inspire preamp, 807 amp, and 45 amp through my workshop. I sure wish I knew about this place when those pieces were around...

Why?

It's kinda like pushrod engines, gaff rigged sailboats, etc.

What's the failure mode you're encountering? I'll admit I thought they could be fun for a stupidly overdone OTL headphone amp, but if a tube that expensive is going to go poof on me, I'll move along to the next project.

7242.

Yeah, put some glass around your bottles for goodness' sake.