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Inspire by Dennis Had Enjoying Vacuum Tube Audio

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  #6401  
Old 04-25-2021, 05:29 PM
Bombadil Bombadil is offline
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Originally Posted by bearcity View Post
We switched to the KT88 SET (triode) amp next with the KT170s. BTW, same OPTs in both amps I was told. I will preface this with this statement. I have yet to meet a pair of KT 88/120/150s I cared for. I know there are many out there who love this class of tube but I always seem to prefer the 6f/l/v6 Pentodes. The KT 170s are the same for me. I switched them out for a pair of 6f6g from the mishmash of tubes there on the coffee table. There was the sound I know so well and absolutely love from my other Inspire amps (custom Universal, PSE, and 6V6er). Wonderful!
I have yet to listen to KT170s. My expectations are that they will sound very similar to KT120 & KT150. Same manufacturer, same basic design. KT120 and KT150 sound very similar in both of my amps. The KT170 was designed to handle higher voltages and produce more power, but I have read nothing indicating that they produce a significantly different sound. In an amp designed for KT120 or KT150, a KT170 won't even produce any additional power.

In an amp specifically designed for KT170, one should realize a significant power increase.
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  #6402  
Old 04-26-2021, 02:54 AM
Bentan Bentan is offline
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I tried mine with the KT170 and they didn’t wow me. Not that they sounded bad though. I still prefer the KT77s or KT88s if I need a bit more power.

I’ve been trying to reach Dennis for a few weeks via email on his pre-amps but he has yet to respond. Is anyone able to reach him?
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  #6403  
Old 04-28-2021, 06:37 PM
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straitwire straitwire is offline
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Default Phono Preamp Prototype

I'm very happy to announce that I've been working on a phono preamp.
I used an LP-3 chassis that was made incorrectly, (can't let it go to waste).
The buffer tube hole in the back was offset to the left so I added a hole beside it and put a couple of Russian voltage regulators in because I like the light show and needed to fill the holes with something.
We have a smaller chassis for the production prototype that is configured differently and doesn't use VR tubes.
It sounds really good but Dennis hasn't given it a final evaluation yet.
I'll keep you posted on it's progress.

[IMG][/IMG]
[IMG][/IMG]
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  #6404  
Old 04-28-2021, 08:20 PM
Cdrdel Cdrdel is offline
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Looking good. What will the tube complement be?
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  #6405  
Old 04-28-2021, 09:18 PM
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straitwire straitwire is offline
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Hey Cdrdel, the tubes are 6SL7s.
I'm running a 5U4 rectifier right now.
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  #6406  
Old 04-29-2021, 11:12 AM
Cdrdel Cdrdel is offline
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Very interesting and thanks for the reply.
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  #6407  
Old 05-04-2021, 05:26 PM
Zimmer Zimmer is offline
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I'd be very interested in a phono preamp, for the record.
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  #6408  
Old 05-04-2021, 10:06 PM
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GeAllan70 GeAllan70 is offline
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Quote:
Originally Posted by Zimmer View Post
I'd be very interested in a phono preamp, for the record.
^^^

__________________
David St. Hubbins "I believe virtually everything I read"
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  #6409  
Old 05-04-2021, 10:42 PM
Zimmer Zimmer is offline
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What, seven years later?
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  #6410  
Old 05-05-2021, 09:40 AM
pgk pgk is offline
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That looks very nice, I'm liking those knurled knobs as well.

Pete
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