The right preamp
Hello,
Second question:
(I'm working on Aleph 30 now)
Someone has tried the BOSOZ with Aleph 30 clone(Pass) as power amplifier?
Impressions?
Thanks for your aid.
Alessandro😕
Hello,
Second question:
(I'm working on Aleph 30 now)
Someone has tried the BOSOZ with Aleph 30 clone(Pass) as power amplifier?
Impressions?
Thanks for your aid.
Alessandro😕
Re: The right preamp
Yeah, just make it . . .
Later, you can convert it easily to any variation including Aleph P1.7
without remaking of the chassis, connection terminals and knobs.
magnum_1 said:
Yeah, just make it . . .
Later, you can convert it easily to any variation including Aleph P1.7
without remaking of the chassis, connection terminals and knobs.
I haven't used my BZLS with an Aleph 30, but I regulary use it with my Aleph-X, and my headphone amp which is an Aleph-type circuit. It works very well indeed with both amp designs.
Thanks guys for your impressions !😉 😉 😉
So ,early I'll build a BOSOZ for my Aleph .....
Ciao
Alessandro
So ,early I'll build a BOSOZ for my Aleph .....
Ciao
Alessandro
Member
Joined 2002
Well i have some pictures of my 90% finished pre-amp has taken a long time to get this far but it powers up and no smoke. Just needs the inputs/outputs installed and then wiring for the digital pot.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Sonic difference cc-ccs-xbosoz vs aleph P1.7
Hello,
Have you someone compared cc-ccs-xbosoz to aleph P1.7?
Chois
Hello,
Have you someone compared cc-ccs-xbosoz to aleph P1.7?
Chois
I know that with the Loveltech JFETs you could make
the small power amp, but wondered about noise level?
Would a more conventional JFETs such as 2SK170's
be quiter for line stage only use?
Or how about several paralled 2SK170's? Would you need
individual coscodes for each device or a single large
MOSFET or Bipolar?
the small power amp, but wondered about noise level?
Would a more conventional JFETs such as 2SK170's
be quiter for line stage only use?
Or how about several paralled 2SK170's? Would you need
individual coscodes for each device or a single large
MOSFET or Bipolar?
Although I love my creation, it can, and has been, bettered. It could be modified to work with the Lovoltech power JFET's, but your idea about moving to cascoded 2SK170's is the better approach. I suggest you look at the "Pumpkin" thread by Zen Mod, who has followed that exact design approach.
Cheers, Terry
Cheers, Terry
@ Terry ,
is it possible that you share some hints
about modifieing your creation to work
with the Lovoltech Power J-Fets ?
Thanx in advance
Jürgen
is it possible that you share some hints
about modifieing your creation to work
with the Lovoltech Power J-Fets ?
Thanx in advance
Jürgen
Coloradosound,
Yep!
Jurgen,
Let me take a look at what would be needed in terms of changes to get optimal performance. I expect it won't take much.
Cheers, Terry
Yep!
Jurgen,
Let me take a look at what would be needed in terms of changes to get optimal performance. I expect it won't take much.
Cheers, Terry
@ Terry ,
again thank you very much in advance
for taking the time .
Greetings from Germany !
Jürgen
again thank you very much in advance
for taking the time .
Greetings from Germany !
Jürgen
I don't think the Pumpkin would be what I want to do either,
Terry. It looks like the JFETs are used for voltage gain only
and then passes through MOSFETs anyway for current gain.
I was just thinking of a whole bunch of 2SK170BL or similar
in place of your Q1-Q2. Like 2 or 4 paralelled in each Q1 and
Q2 position. Would that give me sufficient output current
capability? Would I need separate coscodes for each or would
a single coscode per side handle 4 or so JFETs in those Q1, Q2
positions?
Terry. It looks like the JFETs are used for voltage gain only
and then passes through MOSFETs anyway for current gain.
I was just thinking of a whole bunch of 2SK170BL or similar
in place of your Q1-Q2. Like 2 or 4 paralelled in each Q1 and
Q2 position. Would that give me sufficient output current
capability? Would I need separate coscodes for each or would
a single coscode per side handle 4 or so JFETs in those Q1, Q2
positions?
You really don't need all the current capability, especially if you are using CC-jfets-X. You don't even need CCS for it to sound really, really good. (I listened to it for a long time with and without CCS).
Gain is another thing, but I think a single 2sk170 has plenty of gain for this app.
If you have a 10mA Idss jfets, just set your total current to 18mA or so and you are good.
JJ
I would want to be able to drive 600 ohm loads
and I also saw somewhere that paralelling JFETs
is a good way to lower noise level more. (?)
and I also saw somewhere that paralelling JFETs
is a good way to lower noise level more. (?)
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