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September 12, 2014, 05:51 PM #1
Is it possible to wire Conrad Johnson amps in Triode mode? ....
I seem to remember some amps were available wired for Triode operation. Does anyone know if it's still possible? I sent a note to CJ and I'm still waiting for their response.
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NAD C 658 streamer.
First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)
Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 12, 2014, 06:23 PM #2
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Two questions here:
1) is it possible to wire CJ amps in triode? The answer is yes.
2) Will CJ perform this for you? The answer is I have no idea.
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September 12, 2014, 06:26 PM #3
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.
Job INTegrated. Luxman L-595aSE
NAD C 658 streamer.
First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)
Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 12, 2014, 07:43 PM #4
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
If you were handy with a soldering iron, you could do it yourself. You basically are just electrically connecting the grid to the plate so they are at the same electrical potential which turns a pentode into a triode (pin 4 to pin 3). There is usually a 100 ohm resistor that goes from the grid to ground as well.
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September 12, 2014, 08:24 PM #5
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Sorry mep, not quite right. It is pins 3 and 4, but it is called the screen grid. Just "grid" usually means control grid which is the tubes input (pin 5). I mention this, because incorrect wiring will result in fireworks.
The 100 ohm resistor you mention goes between the plate and screen, not to ground. It's there to limit current to the screen which is far more delicate than the plate.
Pin numbers are for kt88, el34 etc.Dan Santoni
Authorized service for (in no particular order) - Copland, Cary, Unison Research, Allnic, Modwright, Ayon, Hegel, Belles, Aesthetix, Coincident, Zesto and a whole bunch more
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September 12, 2014, 08:27 PM #6
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
I've yet to hear a pentode based amplifier sound better run in triode. Last cj amplifier I remember that was convertible was the Prem. 8. Think that says a lot. If it was better, cj would offer it. You just sacrifice way too running in triode.
Myles B. Astor, Senior Editor, PF, www.positive-feedback.com
Zellaton Plural Evo speakers, Doshi Audio EVO phonostage, VPI Avenger direct-drive turntable/VPI 12-inch gimbal Fatboy/vdH Colibri Master Signature/Triangle Art Apollo cartridges, SAT LM-12 tonearms/Lyra Atlas SL Lambda, VPI 12-inch gimballed Carbon Fiber arm/vdh Black Crimson and Sumiko Songbird, Mutech Hayabusa cartridges
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September 12, 2014, 08:36 PM #7
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Yes, it's called the screen grid which is pin 4 as I said. If you tied the control grid (pin 5) that would be a problem. As for the 100 ohm resistor, I just remember that it's usually necessary and I may have been mistaken for where it's tied to. It's been a long time since that was on my tube radar.
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September 12, 2014, 08:40 PM #8
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
You give up power and some control/punch in the bass typically. You normally lose about 1/2 of your pentode output power. Some people love the sweetness of the triode sound and are willing to sacrifice the bass punch and extra power to gain that sweetness. Not so good for rock, but some jazz people and chamber music people think it's the bomb. Some amps give you a switch so you can listen in either mode vice having it hardwired in.
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September 12, 2014, 08:44 PM #9
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Myles B. Astor, Senior Editor, PF, www.positive-feedback.com
Zellaton Plural Evo speakers, Doshi Audio EVO phonostage, VPI Avenger direct-drive turntable/VPI 12-inch gimbal Fatboy/vdH Colibri Master Signature/Triangle Art Apollo cartridges, SAT LM-12 tonearms/Lyra Atlas SL Lambda, VPI 12-inch gimballed Carbon Fiber arm/vdh Black Crimson and Sumiko Songbird, Mutech Hayabusa cartridges
Technics RS1506 reel-to-reel with low inductance Flux Magnetic heads, Doshi Audio EVO tapestage, AudioQuest Dragon Zero, Audience FrontRow, Ensemble PC, Skogrand, Kubala-Sosna Realization speaker cable, Ikigai Kangai speaker cable, SRA Craz 3/OHIO 2.3 platforms and Symposium ISIS/Ultra rack/platforms, Silver Circle Tchaik 6 PLC.
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September 12, 2014, 08:47 PM #10
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September 12, 2014, 11:36 PM #11
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
I appreciate everyone's thoughts. I would not do it on my ART monos but would consider ordering an amp wired that way if CJ gives the thumbs up or says they like what they hear. I do agree Myles, that the fact it's not offered currently kind of says something.
Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.
Job INTegrated. Luxman L-595aSE
NAD C 658 streamer.
First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)
Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 13, 2014, 01:38 AM #12
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.
Job INTegrated. Luxman L-595aSE
NAD C 658 streamer.
First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)
Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 13, 2014, 09:52 AM #13
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Haven't listened to any lately seriously since they all tend to be lower powered. (Isn't the Cary Mike was talking about recently 211 based?). Two that I would check out are the Tube Guru and Tron. I think AirTight did at one time make a 211 based amp too.
Best I ever heard was a 100 watt 211 based amp from Sonic Frontiers. You've never heard things sound more real or images feel more palpable.Myles B. Astor, Senior Editor, PF, www.positive-feedback.com
Zellaton Plural Evo speakers, Doshi Audio EVO phonostage, VPI Avenger direct-drive turntable/VPI 12-inch gimbal Fatboy/vdH Colibri Master Signature/Triangle Art Apollo cartridges, SAT LM-12 tonearms/Lyra Atlas SL Lambda, VPI 12-inch gimballed Carbon Fiber arm/vdh Black Crimson and Sumiko Songbird, Mutech Hayabusa cartridges
Technics RS1506 reel-to-reel with low inductance Flux Magnetic heads, Doshi Audio EVO tapestage, AudioQuest Dragon Zero, Audience FrontRow, Ensemble PC, Skogrand, Kubala-Sosna Realization speaker cable, Ikigai Kangai speaker cable, SRA Craz 3/OHIO 2.3 platforms and Symposium ISIS/Ultra rack/platforms, Silver Circle Tchaik 6 PLC.
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September 13, 2014, 12:22 PM #14
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Isn't the Cary Mike was talking about recently 211 based?)
You could also try the Coincident 211 Dragon. Two 211's in push pull.Dan Santoni
Authorized service for (in no particular order) - Copland, Cary, Unison Research, Allnic, Modwright, Ayon, Hegel, Belles, Aesthetix, Coincident, Zesto and a whole bunch more
Custom Manufacturer of Blackdog HiFi.
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www.blackdoghifi.com
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September 13, 2014, 12:28 PM #15
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Myles B. Astor, Senior Editor, PF, www.positive-feedback.com
Zellaton Plural Evo speakers, Doshi Audio EVO phonostage, VPI Avenger direct-drive turntable/VPI 12-inch gimbal Fatboy/vdH Colibri Master Signature/Triangle Art Apollo cartridges, SAT LM-12 tonearms/Lyra Atlas SL Lambda, VPI 12-inch gimballed Carbon Fiber arm/vdh Black Crimson and Sumiko Songbird, Mutech Hayabusa cartridges
Technics RS1506 reel-to-reel with low inductance Flux Magnetic heads, Doshi Audio EVO tapestage, AudioQuest Dragon Zero, Audience FrontRow, Ensemble PC, Skogrand, Kubala-Sosna Realization speaker cable, Ikigai Kangai speaker cable, SRA Craz 3/OHIO 2.3 platforms and Symposium ISIS/Ultra rack/platforms, Silver Circle Tchaik 6 PLC.
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September 13, 2014, 01:35 PM #16
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
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September 14, 2014, 12:45 AM #17
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.
Job INTegrated. Luxman L-595aSE
NAD C 658 streamer.
First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)
Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 15, 2014, 05:21 PM #18
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Update:
Conrad Johnson will wire an ARTsa in triode mode and substitute the KT120 for Mullard EL34's.
That could be fun!Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.
Job INTegrated. Luxman L-595aSE
NAD C 658 streamer.
First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)
Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.
Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables.
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September 15, 2014, 05:39 PM #19
Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
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October 28, 2014, 03:59 PM #20
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Re: Is it possible to wire Conrad Johnson amps in Triode mode? ....
Same could be said of both of my Bob Latino amps. Easily switchable to triode mode with toggles on the top deck. I could experiment endlessly. Eventually just left them in ultralinear. Far more lively with more the "bite" of the real thing. If I did such a mod, I would certainly make it switchable.
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AudioShark forum is a leading forum site for High End Audio Discussion, Stereo System Discussion, Home Theater System Discussion, Best Home Stereo System Discussion, Home Theater Installation Discussion etc.
The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.
At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.
We are as crazy about this hobby as you are! So come on in and join us! Audioshark.org the Friendliest Audio Forum!
Industry Participation Disclosure : The owner and administrator of Audioshark is the owner of Suncoast Audio LLC in Sarasota Florida. Suncoast Audio has a full brick and mortar presence in Sarasota with several great show rooms with many world class brands. More information can be found at http://www.suncoastaudio.com
Audioshark is a community of like minded individuals. Audioshark welcomes participation from all manufacturers and owners of all brands and products. It is our belief that online forums provide a community of like minded audiophiles and music lovers to encourage the growth of this wonderful hobby.
Sincerely,
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