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Inspire by Dennis Had Enjoying Vacuum Tube Audio

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  #6341  
Old 03-29-2021, 10:58 PM
Zimmer Zimmer is offline
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A pair of KT170 tubes arrived today. Big box tubes, thicker packaging, and they do fit on the old Fire Bottle amp. Don't sound bad, either!
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  #6342  
Old 03-30-2021, 07:45 AM
bearcity bearcity is offline
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Quote:
Originally Posted by Bombadil View Post
A guy on a FB tube discussion group posted a photo of his 2013 Inspire amp. Looks like one of the standards from that era, with two KT88 power tubes and a 5U4GB/274B rectifier. He bought it used and says the driver tube is a Russian 6H1N-EB (equivalent to a 6N1P).



I was unaware that Dennis ever used one of these as a stock tube.



This guy now wants to tube roll and is trying to identify equivalents to the 6H1N. I am wondering if it may have been a 6DJ8/6922 stock and someone sub'ed the 6H1N into it. Some people do that even though they are not equivalents.



Anyone know if Dennis ever designed an amp for the 6H1N / 6N1P?


I have one of those amps. I tried some of 6DJ8/6922s and when returning to the Soviet tubes came to the conclusion that they were better sounding. Also tried 6cg7. Ultimately settled on 6h6n, a Soviet twin, medium gain, well designed tube. Lots of flash getter. And a shield between sections.
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  #6343  
Old 03-30-2021, 01:34 PM
AMammal AMammal is offline
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I have a pre-amp LP-3a made labelled as a proto due to the original buyer requesting the russian tube complement and a remote control volume.

It has 3 6H1Pi(6N1P) tubes and a GE 6CG7.

The amp that is with it is a 6v6 in the same long form factor and has one 6H1Pi as well.

Love these amps. The vocal & guitar textures are phenomenal and they're a real joy to listen to.
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  #6344  
Old 03-30-2021, 01:55 PM
AMammal AMammal is offline
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Quote:
Originally Posted by Analog Addict View Post
There were amps with 6DJ8/6922/7308 or the Russian equivalent. Dennis' buddy gave him a big bag of Amperex gold pin 7308s at one point....
Does this mean those 6DJ8/6922/7308 tubes are suitable replacements for the 6N1P tubes in these amps? I'm happy with the sound, but should it be easier to find one over the other in the future...

Although, Sovtek is making new 6N1P's I'm sure they're good. Anyone hear 'em?
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  #6345  
Old 04-01-2021, 03:06 PM
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straitwire straitwire is offline
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I stopped by the Inspire toy factory this afternoon and discovered Dennis is really serious about the 300B sound.
Another 300B stereo amp playing it's heart out with a brand new set of production Western electric 300B's.

[IMG][/IMG]
[IMG][/IMG]
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  #6346  
Old 04-01-2021, 04:37 PM
hrparsons hrparsons is offline
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I think I want one.
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  #6347  
Old 04-01-2021, 09:28 PM
Bombadil Bombadil is offline
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Quote:
Originally Posted by AMammal View Post
Does this mean those 6DJ8/6922/7308 tubes are suitable replacements for the 6N1P tubes in these amps? I'm happy with the sound, but should it be easier to find one over the other in the future...

Although, Sovtek is making new 6N1P's I'm sure they're good. Anyone hear 'em?
The 6N1P is not a true equivalent of a 6DJ8-type tube. It will draw twice the heater current and the Gm is way off. People do substitute 6DJ8 and vice versa but they really shouldn't. Some dealers even advertise 6N1P as being 6DJ8 equivalents. They are pin-equivalent but will not behave the same in a circuit.

The Russian 6N23P is a close equivalent to 6DJ8/692.

The 6N1P is a good tube. At least some of them are. Most people like the Russian production better than the China ones. The NOS Russian 6N1P-EV are well thought of.
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  #6348  
Old 04-02-2021, 09:45 AM
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straitwire straitwire is offline
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Quote:
Originally Posted by hrparsons View Post
I think I want one.
Hey hrparsons, me too!
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  #6349  
Old 04-02-2021, 10:24 AM
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GeAllan70 GeAllan70 is offline
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Sexy!!



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David St. Hubbins "I believe virtually everything I read"
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  #6350  
Old 04-02-2021, 05:37 PM
hrparsons hrparsons is offline
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My heavens look at that indicator on the volume. In the other photo it's even further. Sweet honey mustard.
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