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Inspire by Dennis Had Enjoying Vacuum Tube Audio

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  #5271  
Old 04-23-2019, 06:00 PM
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straitwire straitwire is offline
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Hey Mario54, I don't know the answer to that question, you would have to contact Dennis...
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  #5272  
Old 04-23-2019, 06:10 PM
FloridaBoy FloridaBoy is offline
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I bought a used PSE with IIPS. I understand that the amp has solid state rectification. So, what is the function of the rectifier tube and does the voltage change when, for example, a 5U4G instead of a 5Y3G is used?

BTW, EL84's sound quite good in it.
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  #5273  
Old 04-23-2019, 07:35 PM
Rosco65 Rosco65 is offline
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I bought a used PSE with IIPS. I understand that the amp has solid state rectification. So, what is the function of the rectifier tube and does the voltage change when, for example, a 5U4G instead of a 5Y3G is used?

BTW, EL84's sound quite good in it.
The rectifier tube is now used in the IIPS. It is used as a vacuum buffer between the B+ and the regulated PS.

I own an early PSE, the last one before the IIPS. It had KT88s and a 5AR4. Dennis announced the IIPS and I immediately (within one week) sent it back for the upgrade. He added a SS rectifier, rewired the tube rectifier to act as a DC-DC rectifier between the B+ and the regulated PS. It uses the tubes vacuum to buffer the regulated PS from surges in B+ voltage under load. Conversely, the rectifier tube buffers the B+, giving it some tube rectifier sound.

The primary benefit of the IIPS is the stabilization of the screen grid PS. Dennis asserted that instability in this PS can cause parasitic distortion in the tube output. He did not feel that this was as necessary in triodes.
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  #5274  
Old 04-24-2019, 06:51 AM
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BearCityUSA BearCityUSA is offline
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I bought a used PSE with IIPS. I understand that the amp has solid state rectification. So, what is the function of the rectifier tube and does the voltage change when, for example, a 5U4G instead of a 5Y3G is used?



BTW, EL84's sound quite good in it.


I’m running 6L6 metal in mine. Outstanding.
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  #5275  
Old 04-25-2019, 06:04 AM
FloridaBoy FloridaBoy is offline
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I’m running 6L6 metal in mine. Outstanding.
6L6's sound excellent too. I used 6L6GA's with a 5Y3G rectifier.
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  #5276  
Old 04-25-2019, 10:31 AM
decooney decooney is offline
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6L6's sound excellent too. I used 6L6GA's with a 5Y3G rectifier.
Learning from other members, FloridaBoy truly knows his tube combinations.

I'm trying some of FloridaBoys tubes now with other amps yielding great results.
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  #5277  
Old 04-25-2019, 06:59 PM
Mario54 Mario54 is offline
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Hey Mario54, I don't know the answer to that question, you would have to contact Dennis...
Is he on this forum?
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  #5278  
Old 04-25-2019, 08:03 PM
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Masterlu Masterlu is offline
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Is he on this forum?
No, he is not.
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  #5279  
Old 04-26-2019, 06:35 AM
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BearCityUSA BearCityUSA is offline
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Is he on this forum?


Dennis is not on any forums. He feels it is a conflict of interest. You can contact him on eBay.
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  #5280  
Old 04-28-2019, 10:01 AM
bwilson51 bwilson51 is offline
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Default How high are the tubes bias on Inspire SEP Amps
Does anyone know how high the tubes are bias on Inspire Sep amps,I was wondering how much stress is put on the output tubes
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