Birth of a New Model One

Vintage 700b

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#41
Hi Joe,
Yes, that is the issue. I have a non-latching version of the switch, it is ON-Mom.
It was frustrating me trying to figure out why I had no continuity unless I held the switch in.
Correct switch on it's way.
Thank You
 

Gepetto

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#42
Hi Joe,
Yes, that is the issue. I have a non-latching version of the switch, it is ON-Mom.
It was frustrating me trying to figure out why I had no continuity unless I held the switch in.
Correct switch on it's way.
Thank You
You have the 'push to listen' version of the Model ONE amp John... :cool:
 

Vintage 700b

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#43
You have the 'push to listen' version of the Model ONE amp John... :cool:
Does the "push to listen" version come with a telescoping broom handle so I can sit in the sweet spot and listen? :D
I don't think that version will be a hot seller.
I did get the rest of the wiring done today, heat sinks chamfered, and checked the amplifier very thoroughly from one end to the other.
Getting close to initial bring up and adding transistors.
Thanks for everything all of you !
 

J!m

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#44
A cotactor for power control is not a crazy idea- latch it and if the power drops out for any reason, the switch (contactor) remains open to avoid sudden in-rush and short on/off cycles as the power company gets stuff back on line again...

Costs money to have cool features, so production usually didn't bother.
 

Gepetto

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#45
A cotactor for power control is not a crazy idea- latch it and if the power drops out for any reason, the switch (contactor) remains open to avoid sudden in-rush and short on/off cycles as the power company gets stuff back on line again...

Costs money to have cool features, so production usually didn't bother.
The Model ONE handles that elegantly Jim...
 

Vintage 700b

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#47
Finally getting back to posting some pictures of the Model One Build and Completion.

My jaw is still on the floor from first passing a signal through the new Model One. I have built and enjoyed (3) Fully WOPL’s 700b’s and have been so happy with them, after owning them since the late 1970’s and dealing with all of the Phase Linear issues. I cannot say enough about the full WOPL treatment, Joe’s designs are amazing.

Then there is the Model One……I have thoroughly enjoyed the build, superb, world class quality, very well designed, and now to experience the music through the Model One, it is definitely next level. I didn’t think anything could surpass the last fully WOPL’d 700b that I built in terms of sound definition, but as I get to know this new Model One, I am amazed. I finished the assembly yesterday, and added it my second system to prove out any bugs that I may have encountered. I have older JBL Studio Monitors (4343B 4 Way) in that system, and did not want to hook the Model One up into my main system, until I had some time on it. Honestly I have never heard those JBL’s sound that good, ever!

So after several hours of feeding the new Model One, all types of music, I could not put off adding it to my main system. I run Klipsch LaScala’s and a REL Sub-Woofer in the main system. The horns love this amplifier. I don’t want to get to wordy here, and I have some listening to do, but I am blown away by what I am hearing on many of my favorite recordings, LP’s, CD’s and streaming already.

There is a new depth to the soundstage, almost a 3d type experience, it is crisper, more defined, and unbelievably …. more headroom! I am hearing small details between me and the amplifier, if that makes any sense. Soundstage has always been incredible with the WOPL 700b, but this new “depth” is exciting.

I will leave it at that. I would love to build one a month, I enjoyed this experience immensely….and I learned the workings of a very well-designed amplifier thoroughly.
Thanks
 

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Hexis22

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Dec 28, 2022
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#51
Finally getting back to posting some pictures of the Model One Build and Completion.

My jaw is still on the floor from first passing a signal through the new Model One. I have built and enjoyed (3) Fully WOPL’s 700b’s and have been so happy with them, after owning them since the late 1970’s and dealing with all of the Phase Linear issues. I cannot say enough about the full WOPL treatment, Joe’s designs are amazing.

Then there is the Model One……I have thoroughly enjoyed the build, superb, world class quality, very well designed, and now to experience the music through the Model One, it is definitely next level. I didn’t think anything could surpass the last fully WOPL’d 700b that I built in terms of sound definition, but as I get to know this new Model One, I am amazed. I finished the assembly yesterday, and added it my second system to prove out any bugs that I may have encountered. I have older JBL Studio Monitors (4343B 4 Way) in that system, and did not want to hook the Model One up into my main system, until I had some time on it. Honestly I have never heard those JBL’s sound that good, ever!

So after several hours of feeding the new Model One, all types of music, I could not put off adding it to my main system. I run Klipsch LaScala’s and a REL Sub-Woofer in the main system. The horns love this amplifier. I don’t want to get to wordy here, and I have some listening to do, but I am blown away by what I am hearing on many of my favorite recordings, LP’s, CD’s and streaming already.

There is a new depth to the soundstage, almost a 3d type experience, it is crisper, more defined, and unbelievably …. more headroom! I am hearing small details between me and the amplifier, if that makes any sense. Soundstage has always been incredible with the WOPL 700b, but this new “depth” is exciting.

I will leave it at that. I would love to build one a month, I enjoyed this experience immensely….and I learned the workings of a very well-designed amplifier thoroughly.
Thanks
Very nice!

Glad to see another Model ONE making music out in the world.

Interesting to see the size comparison to a 700B, the power supply toroidal transformer within the ONE is massive (along with twice the capacitance of a 700B).
 
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