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Pete Millett SSII tube hybrid headphone amp kit
Pete Millett SSII tube hybrid headphone amp kit
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Old 20th March 2019, 02:36 AM   #1
6L6 is online now 6L6  United States
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Pete Millett SSII tube hybrid headphone amp kit
Default Pete Millett SSII tube hybrid headphone amp kit

Lots of info here - Starving Student II Headphone Amplifier – diyAudio Store



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Old 20th March 2019, 10:49 PM   #2
xrk971 is online now xrk971  United States
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Pete Millett SSII tube hybrid headphone amp kit
That looks like a nice amp. Are there any performance specs like minimum headphone impedance, gain, bias current, output impedance, THD, SNR, etc?

I also have a hybrid tube headphone amp, but made by Massdrop in collaboration with Alex Cavalli - the Cavalii Tube Hybrid (CTH). I like it very much and it is quite clean sounding and very powerful. About the same price but you don’t get satisfaction of making it yourself. This kit is well priced given all the parts and case already all collected for the user to assemble. Nice job.
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Old 21st March 2019, 03:39 PM   #3
blackdod is offline blackdod  Europe
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Nice amp. This kit has an impeccable appearance.
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Old 21st March 2019, 04:55 PM   #4
JSA1971 is offline JSA1971  Canada
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Pete Millett SSII tube hybrid headphone amp kit
Does anyone know if the blue leds are a “do not substitute” item? I checked the BOM and documentation of the original Starving Student amp but they are not part of the version 1 design.
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Old 21st March 2019, 05:55 PM   #5
rayma is offline rayma  United States
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Quote:
Originally Posted by JSA1971 View Post
Does anyone know if the blue leds are a “do not substitute” item?
The LEDs bias both the current source plate loads and also the cathodes,
so I would not substitute them.
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Old 22nd March 2019, 01:37 PM   #6
JSA1971 is offline JSA1971  Canada
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Pete Millett SSII tube hybrid headphone amp kit
Quote:
Originally Posted by rayma View Post
The LEDs bias both the current source plate loads and also the cathodes,
so I would not substitute them.
Thanks Rayma 👍🏻
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Old 22nd March 2019, 04:25 PM   #7
00940 is offline 00940  Belgium
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Nice and should be an easy build for a beginner.

The name doesn't quite fit anymore though (the original's budget was under 40$, intended to be built p2p in a recycled case). And I wonder about the use of the 18FX6. Adapting it to the very common/easily sourced 12AU7 would have been a good idea.
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Old 22nd March 2019, 04:30 PM   #8
6L6 is online now 6L6  United States
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Pete Millett SSII tube hybrid headphone amp kit
Quote:
Originally Posted by xrk971 View Post
That looks like a nice amp. Are there any performance specs like minimum headphone impedance, gain, bias current, output impedance, THD, SNR, etc?
Yes, there is a summary in the sales page, and there are a number of graphs that will be added to the build guide in the near future.
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Old 24th March 2019, 01:48 PM   #9
jackinnj is offline jackinnj  United States
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Pete Millett SSII tube hybrid headphone amp kit
18FX6 -- nice beefy tube, 2,2W dissipation if plate and screen are connected? mu looks like 6DJ8 ~36
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Old 25th March 2019, 09:55 AM   #10
JSA1971 is offline JSA1971  Canada
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Pete Millett SSII tube hybrid headphone amp kit
I see that the kit has sold out very quickly. If anyone can give some impressions of the ease of build, thoughts in general about the sound quality, and if they’ve tried it out as a headphone amp or linestage that would be great!
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