now crank the voltage , crank the current , double input JFet (with double current) and enjoy
then Shade IRFP240 in same conditions
then Shade IRFP240 in same conditions
Thanks ZM.... Lots of great things to try.
I have been thinking about the discussion about there already being a Schade feedback loop and the one right at Q1 being redundant. Looking at the circuit I was wondering about eliminating the outside one to see what the inside one alone sounds like (as an experiment). Would splitting R10 into two resistors equal to same 332 K and connecting their midpoint to ground through a capacitor effectively do that while leaving intact DC bias?
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It appears the USCi power JFETs can now be purchased direct. Not sure how long this has been the case or if others here have already noticed this, but thought I would pass along the information. Added four UJN1208K to my cart (at $18 a piece) and was ready to purchase until I saw the $25 handling fee. Perhaps a group buy is in order to minimize the handling fee loss?
JFETs in SiC do NOT offer the best linearity. It's just that the only SiC devices that someone used in the audio world were some sic(k) devices from Semisouth.
SJTs, especially the one you pointed - GA10JT12-247 offers the best I-V linearity than ANY other transistor made in Silicon Carbide. The latest generation of SiC Junction Transistors will offer better audio quality than anything else on the market.
Gyuri, you need to make your opinions based on actual experiments, not what losers say.
SJTs, especially the one you pointed - GA10JT12-247 offers the best I-V linearity than ANY other transistor made in Silicon Carbide. The latest generation of SiC Junction Transistors will offer better audio quality than anything else on the market.
Gyuri, you need to make your opinions based on actual experiments, not what losers say.
Dear genesicsemi,
Who are know me, they know I am the loser. 🙂
My experiences are very limited, just as my english and electronics knowledge.
About Sic power J-fets I only know that, I am listen my diy Firstwatt J2 with great joy and pleasure! 😀
Who are know me, they know I am the loser. 🙂
My experiences are very limited, just as my english and electronics knowledge.
About Sic power J-fets I only know that, I am listen my diy Firstwatt J2 with great joy and pleasure! 😀
First, I would like to welcome you to diyaudio! That said, my first impression, based on 66% of your first 3 posts where you resort to name calling, isn't a positive one.
If true, your claims of superiority of the GA10JT12-247 for audio use is an exciting development. The only way we will know for sure is if you provide samples to members of our forum to experiment with. I heartily encourage you to do so!
Cree C3M0065090D
Had the day off today and a lucky coincidence... a Mouser package arrived at the door. How does it get better?
Anyway, received a pair of C3M0065090D Cree, Inc. | Mouser and proceeded to drop them into the bottom half of a Mini Aleph. After powering up I checked the bias (same as usual), I let the amp warm up before cracking a beer and listening to some tunes...
I don't have any measurement equipment so I can't relay any data there. But I have run through some familiar tunes and my first impression was "man, this sounds a little bright" and it certainly wasn't placebo.
The Cree datasheet says these have 660/60 pF input/ouput cap.. so maybe it's just the highs that were muffled from the IR devices.
There doesn't seem to be any free lunch however; the amp definitely does voices better, the soundstage deeper, realism officially enhanced, but that loosey-goosey Aleph bass that I've come to live, learn and love (or was it just big and bloated against those mids/highs this whole time?) seems to have disappeared. I'm going to have to live with this for some more time to figure out whether or not I like it. I generally listen to a lot of dub/reggae and like the sound to be 'warm'.
Had the day off today and a lucky coincidence... a Mouser package arrived at the door. How does it get better?
Anyway, received a pair of C3M0065090D Cree, Inc. | Mouser and proceeded to drop them into the bottom half of a Mini Aleph. After powering up I checked the bias (same as usual), I let the amp warm up before cracking a beer and listening to some tunes...
I don't have any measurement equipment so I can't relay any data there. But I have run through some familiar tunes and my first impression was "man, this sounds a little bright" and it certainly wasn't placebo.
The Cree datasheet says these have 660/60 pF input/ouput cap.. so maybe it's just the highs that were muffled from the IR devices.
There doesn't seem to be any free lunch however; the amp definitely does voices better, the soundstage deeper, realism officially enhanced, but that loosey-goosey Aleph bass that I've come to live, learn and love (or was it just big and bloated against those mids/highs this whole time?) seems to have disappeared. I'm going to have to live with this for some more time to figure out whether or not I like it. I generally listen to a lot of dub/reggae and like the sound to be 'warm'.
Had the day off today and a lucky coincidence... a Mouser package arrived at the door. How does it get better?
Anyway, received a pair of C3M0065090D Cree, Inc. | Mouser and proceeded to drop them into the bottom half of a Mini Aleph. After powering up I checked the bias (same as usual), I let the amp warm up before cracking a beer and listening to some tunes...
I don't have any measurement equipment so I can't relay any data there. But I have run through some familiar tunes and my first impression was "man, this sounds a little bright" and it certainly wasn't placebo.
The Cree datasheet says these have 660/60 pF input/ouput cap.. so maybe it's just the highs that were muffled from the IR devices.
There doesn't seem to be any free lunch however; the amp definitely does voices better, the soundstage deeper, realism officially enhanced, but that loosey-goosey Aleph bass that I've come to live, learn and love (or was it just big and bloated against those mids/highs this whole time?) seems to have disappeared. I'm going to have to live with this for some more time to figure out whether or not I like it. I generally listen to a lot of dub/reggae and like the sound to be 'warm'.
Do 3 pairs and you should get your bass back.
Not an option on those sinks 😀 I think I'll let them burn in for a while before casting final judgement. So far they do details really well, it's just.. well, you know.
I have four of the C3M awaiting some kind of build... Was thinking about using them in an F6. Glad to see someone else using them.
What voltage/current are you using in the Mini-A?
What voltage/current are you using in the Mini-A?
Mine's at 18.5V, 1.55A.. I actually think Pico is on to something (beside the obvious). It might be the case that this particular device finds nirvana in multiple pairs where it gains authority without losing all the crispy crisps I'm hearing right now. Unfortunately, I don't having any use for those big amps in my little home..
Yeah but it won't be a Mini Aleph anymore. Hahahaha
I always follow the ear, don't let technicalities get in the way.