Have been working on a new circuit for it and building the chassis this morning. When daughter goes for her nap I will finish the breadboard part of it. Need to get a metal file to file out the power plug IEC hole.
Have used both pots and it really depends on the curve of your particular pair of LDRs. Mostly audio pot though. Linear can work with a small resistor or a trimmer across the gang on the pot that controls shunt so that it doesnt get loud fast which is usually the only annoyance.
My new one will be able to have selectable impedance and I can window the resistance of series or shunt LDRs to. Pretty fun, but have only had it working on protoboard so far. Listening to it probably this weekend.
Oh, I have been using a 1k audio pot
to control the LDRs.
We could talk more but email is better than a major threadjack
Uriah
Have used both pots and it really depends on the curve of your particular pair of LDRs. Mostly audio pot though. Linear can work with a small resistor or a trimmer across the gang on the pot that controls shunt so that it doesnt get loud fast which is usually the only annoyance.
My new one will be able to have selectable impedance and I can window the resistance of series or shunt LDRs to. Pretty fun, but have only had it working on protoboard so far. Listening to it probably this weekend.
Oh, I have been using a 1k audio pot
to control the LDRs.We could talk more but email is better than a major threadjack
Uriah
Fugly
Hi Zen,
What means fugly? FeryUgly or something like that? Ha ha...
This afternoon I did the first serious listening sessions. My good old Aleph5 is the reference.
The Aleph 5 sounds a little bit softer but both amps have lots of space and depts.
The idling current of the BA2 is 1A per fet at 20V so the dissipation is 120W/channel so comparing both amps is really a hot issue at my small attic room.
The pre amp is cheffs UGS.
A question for the component specialists...
What is a good choice for drain resistor of the VAS (750R/3w)?
I ordered some wire wound precision resistors but I'm a little affraid of the induction. In fact I'm looking for something with a low temp coefficent/low noise but couldn't find anything.
Suggestions?
Thx
Johan
Hi Zen,
What means fugly? FeryUgly or something like that? Ha ha...
This afternoon I did the first serious listening sessions. My good old Aleph5 is the reference.
The Aleph 5 sounds a little bit softer but both amps have lots of space and depts.
The idling current of the BA2 is 1A per fet at 20V so the dissipation is 120W/channel so comparing both amps is really a hot issue at my small attic room.
The pre amp is cheffs UGS.
A question for the component specialists...
What is a good choice for drain resistor of the VAS (750R/3w)?
I ordered some wire wound precision resistors but I'm a little affraid of the induction. In fact I'm looking for something with a low temp coefficent/low noise but couldn't find anything.
Suggestions?
Thx
Johan
Hi Zen,
What means fugly? FeryUgly or something like that? Ha ha...
This afternoon I did the first serious listening sessions. My good old Aleph5 is the reference.
The Aleph 5 sounds a little bit softer but both amps have lots of space and depts.
The idling current of the BA2 is 1A per fet at 20V so the dissipation is 120W/channel so comparing both amps is really a hot issue at my small attic room.
The pre amp is cheffs UGS.
A question for the component specialists...
What is a good choice for drain resistor of the VAS (750R/3w)?
I ordered some wire wound precision resistors but I'm a little affraid of the induction. In fact I'm looking for something with a low temp coefficent/low noise but couldn't find anything.
Suggestions?
Thx
Johan
everyone around are commenting ( when someone posted something good ) how's nice , awesome blahblah
from several reasons I'm always posting Fugly! as fookin' ugly ...... take it as " that's really ugly , I don't wanna to have something like this , I can make something like that with one hand behind my back etc. "
shortly - that's just expression of my envy
(for critical places you can use MOX resistors - there 3 pcs 2K2/1W in parallel )
mox resistors
(for critical places you can use MOX resistors - there 3 pcs 2K2/1W in parallel )
Hi Zen,
My 0.47R resistors are Mox series too but it's difficult to get the higher values. Above 47R is a problem here in the Netherlands.
I checked Farnell,RS, Digikey etc. but couldn't find what I want.
Any suggestions again?
(for critical places you can use MOX resistors - there 3 pcs 2K2/1W in parallel )
Hi Zen,
My 0.47R resistors are Mox series too but it's difficult to get the higher values. Above 47R is a problem here in the Netherlands.
I checked Farnell,RS, Digikey etc. but couldn't find what I want.
Any suggestions again?
Back in the previous century MOX meant a resistor by Visaton for loudspeaker filters, either the MOX-4 or the MOX-10 series.
Nowadays MOX just means a Metal-OXide resistor, and can be from Mundorf, Visaton, all the way up to let's get really plebish KOA Speer MOX1/2-MOX1-MOX2-MOX3.
Fugly!
I take "fugly" as a Trade mark of Quality. Not necessary a beautiful build. But of great quality.
everyone around are commenting ( when someone posted something good ) how's nice , awesome blahblah
from several reasons I'm always posting Fugly! as fookin' ugly ...... take it as " that's really ugly , I don't wanna to have something like this , I can make something like that with one hand behind my back etc. "
shortly - that's just expression of my envy
(for critical places you can use MOX resistors - there 3 pcs 2K2/1W in parallel )
I take "fugly" as a Trade mark of Quality. Not necessary a beautiful build. But of great quality.
Fugly in English dictionary 2010?
We can make a suggestion for the new English dictionairy 2010 but our English friends are quite conservative so I'm afraid ...
I take "fugly" as a Trade mark of Quality. Not necessary a beautiful build. But of great quality.
We can make a suggestion for the new English dictionairy 2010 but our English friends are quite conservative so I'm afraid ...
Thx Jacco,
I'll have a look again.
I have seen very beautiful "mini mox" from Ohmite (medical/space quality) but couldn't find a supplier.
I may be on the list or not. I have a chassis from BAF 2008 with
4 complimentary pairs of IFP230's per side. I expect I would need
the front end and bias boards, but not the outputs. From earlier
in the BA2 thread, there was mention of matched jfets for the
front end being available. Is that still a possibility?
thanks,
Skip Pack
4 complimentary pairs of IFP230's per side. I expect I would need
the front end and bias boards, but not the outputs. From earlier
in the BA2 thread, there was mention of matched jfets for the
front end being available. Is that still a possibility?
thanks,
Skip Pack
Hi Variac, thx for the response.
The big advance of the BA2 is it's flexability. I don't want to repeat the details as you can read in Nelson's document but for me it was the reason to give it a try. Also the modulare setup is a point. It's easy for me to change the VAS.
I'm 100% sure it sounds very good. Does it sound better than p.e. an Aleph5 or the well known AX? I don't know. I have an excellent sounding A5 but it has a different supply(dual mono),other main caps, other filter coils, other wiring etc. so it's very difficult to compare.
Both amps sound very good but slight different. Some tracks I like best playing on the A5 others on the BA2.
This afternoon I changed my digital source(Rotel RCD990)to a Cyrus CD8SE and I was so impressed by the sound of the system that I couldn't hit the stop button. I was complete "in the music". The power amp was the Aleph5 and I had no time left to change to the BA2. That's life.
It take a lot of time to do serious and objective listening sessions so after a few weeks I can tell more.