Curious_George

Definitely quasi-complimentary. A tube is like an NPN device. There is no PNP analog (no pun intended) in a tube.

Not sure what you are asking. Can you clarify your question(s)?

Ok, good. Rich (Klipsch forum member: rmlowz) has an Inspire and I know he really enjoys it.

Have you had any feedback from anyone who owns a DH Inspire?

Love the mid-century chest of draws.

The data for the T350 is accurate IF you find a T350 with a good phenolic diaphragm. The T35 and T350 used the same diaphragm and it was common knowledge that the K77 was a cherry picked T35. The same would apply to the T350 as well. The larger motor structure was responsible for extending the high end past 20kHz.

In general, LaScala's sound great on a good tube amp granted the amp has full frequency response from at least 20Hz ~ 20kHz, low noise and distortion. I am not familiar with the particular amp you posted about. Do you know or can you get more info on the amps?

I concur with JJPTKD. Your 9 minute read unfortunately will not reach the 90% of the people who really need to read it.

The only way to know if those amps have any fidelity, is to listen to them and have some documentation of tests performed. The latter is probably not an option, so you’ll have to go by what they sound like.

Facetiousness and sarcasm, two qualities my previous employer didn’t appreciate about my personality, but I made them a $hitload of money.

I noticed the 4P is a Loktal socket. I have about 20 NOS Cinch sockets waiting for a project so I’m good there. The power transformer does have a 6.3VAC winding. I was using it in a voltage doubler configuration, but I wanted to clean up the underside and just used a separate 12.6VAC transformer up top. I think I’ll do a CCS with a 317k.

Go Cooley and Tukey!

Let me digress for a moment… Three books from Bob Cordell, Doug Self and Randy Sloane should have tube equivalents, but they don’t. I found these books back in the day to clearly explain the mechanisms at work in amplifier design. If you design an amp and omit any of the distortion/linearity mechanisms, then you have intentionally designed the amp to be less the optimum and thus introduced your sonic signature to the design. If every amp manufacturer followed the text book, we would all be buying the same amp. Some designers think mechanism “A” has less effect than mechanism “B” and they design accordingly. My point is, is that is all about the circuit design, not so much the boutique parts. If you understand the mechanisms, you design your amp and choose adequate parts to supplement your final design. If one part changes the sound of your design significantly , your design is flawed.

My wife can play the piano (I can’t even play dice) and is quite good at it although it is strictly for pleasure, not a pianist by trade (she is a commercial pilot). We have a piano and it is one of my pieces of “test equipment “. I know exactly what you mean Captain!

Tool Time (Tim Allen)!

I go from one extreme to the other. My tube amps satisfy most of my needs, but sometimes I've got to play my music louder, but I still want the"magic" sound that a tube amp gives me. That's when I switch to one of my SS amps. One of my recent favorites is a Phase Linear 700B chassis that was stripped and reconfigured for full complimentary outputs and a completely new discrete driver board (designed by me of course). I have the PCB ready to go, I just need to send it off to a PCB house. The proto-type driver board is in it now, is a highly modified factory board for proof of concept.

Years ago I was experimenting with a 417A input tube interstage coupled to a 2A3 similar to the image in this thread. My main goal was to see what "all the rage" was concerning this input tube (417A) being transformer coupled to a 2A3/300B. I don't remember my circuit values, but they were different from the ones in the circuit uploaded. I tried a lot of different operating points for both the 417A & 2A3 and was not satisfied (measurement wise) with any of them. Overall, changing the operating points only changed the sound slightly. Nominal distortion was >1% @ 1 Watt, 8 Ohm. This in my opinion is too high, but there did seem to be A LOT OF MAGIC going on in the sound. I bit too much magic for me. The magic in this case was 2nd harmonic distortion and gobs of it. As I said, I am going from memory, and I did not save any circuit notes or graphs from my AP. I may need to mock it up again and post the AP results.

You could learn how to make one in less time...

Exactly, fickle as a school girl.

This is the interesting stuff. Where can we find more?

How ironic I would use that phrase... BTW, I was vacinnated w/ mRNA and did not have any side effects (that I know of yet). It may have lowered my tolerance to stupidity and other loathsome traits...

Well there is that old saying that "work defines who you are", but it should be "how you work defines who you are". I've known a lot of people who show up for work everyday. Never miss any days, take their vacation, work extra when needed, etc. However, some of these people are the worst employees from a productivity stand point. I've used the 7 habits mainly for work (probably should incorporate more into my personal life too, but that is a different story) and it has done well for me. 7 Habits-of-Highly-Effective-People.pdf

I think this question is misplaced and assinine. Perhaps the Captain will soon open up a small boutique amp company? If he puts out a product people want and desire, then he can claim he is successful. It all starts with one product and a happy customer.

Could partially be true, but who cares unless you ask? Like I said, I am (was) just venting.

Virtually zero "on" resistance (no loss, no heat) and fast switching speed.