"if you're using just input RCA, you connect IN+ pad to RCA hot, input GND pad to RCA sleeve, then you solder small SJ1 shorting field to practically short IN- to GND permanently"
Glad I didn't fire up last night! Thoroughly confused now.
step aside, forget everything you were thinking in last few days
in a day or two, go back with fresh head
you're making a problem where problem is nonexistent
differentiate two different things:
1.proper input arrangement when using RCA vs. when using XLR, which is same as with amps you're familiar with - Aleph J, for instance
2. need to connect all existing inputs to GND, during setup procedure, to prevent any garbage ( mishap) to reach amp's inputs
I did explain both of those things in recent postings and you'll understand just if you relax, seeing that there isn't anything which can't be understood
During the setting up procedure (described at post #1) I connected both IN+ and IN- to GND, but once everything is stable I left only IN- shorted to GND, connected my preamp using RCA and started playing some music
We should start a club... The fraternal order of Dodoseses has a nice ring to it...
I am likely a charter member.....We should start a club... The fraternal order of Dodoseses has a nice ring to it...
I still need to attach ground wires from power supply, cl-60 to ground....very close, at work now.
Before this week end, this thing is either going to make music or smoke....unless it just sits there and does nothing....smart azz amplifier trying to drive me nutz.During the setting up procedure (described at post #1) I connected both IN+ and IN- to GND, but once everything is stable I left only IN- shorted to GND, connected my preamp using RCA and started playing some music
I'd like to use a CLC PSU for the XA252.
@Zen Mod has said https://www.diyaudio.com/community/threads/clc-vs-crc.337738/page-5#post-7006451:
Are there alternatives to Hammond?
Several Hammond chokes match those requirements:
Single-coil
What about the choice between mH and mΩ?
Thanks!
John
@Zen Mod has said https://www.diyaudio.com/community/threads/clc-vs-crc.337738/page-5#post-7006451:
and more recently:
Are there alternatives to Hammond?
Several Hammond chokes match those requirements:
Single-coil
- 157E 6mH, 133mΩ, 4A maximum current
- 159ZJ 10mH, 160mΩ, 6A - a popular choice
- 196K6 in series 12mH, 56mΩ resistance per coil, and 6A - presumably 6mH if run separately
- 196M4 in series 20mH, 110mΩ, 4A -> 10mH separately
What about the choice between mH and mΩ?
Thanks!
John
dual coils - , best used in "bucking" arrangement - one coil in positive rail, second in negative rail, phased so DC flux is nulled in core
now, speaking of full mos iteration, good approach
didn't tried so I can't exactly tell how much of a problem it can be, but with Schade and especially SIT implemented in OS, loading of two rails is very unequal, so that could - hypothetically - cause some problems with "bucking" choke arrangement
best bet is to go for separate chokes in rails
can't write much more than I already did
mentioned types- also can't comment from experience, simply not so often to see them in my neck of wood; and why should I when I can get custom ones
yeah, nice example of bucking coils choke is finding NEM AI-50 thread around
or, if lazy, just looking at this
*take care of choke phases, find fun in overall schm......... and note that PSU filter here is choke input type
not for faint of heart, to devise
now, speaking of full mos iteration, good approach
didn't tried so I can't exactly tell how much of a problem it can be, but with Schade and especially SIT implemented in OS, loading of two rails is very unequal, so that could - hypothetically - cause some problems with "bucking" choke arrangement
best bet is to go for separate chokes in rails
can't write much more than I already did
mentioned types- also can't comment from experience, simply not so often to see them in my neck of wood; and why should I when I can get custom ones
yeah, nice example of bucking coils choke is finding NEM AI-50 thread around
or, if lazy, just looking at this
*take care of choke phases, find fun in overall schm......... and note that PSU filter here is choke input type
not for faint of heart, to devise
Attachments
Had a little hiccup today, was trying my new build of a miro dac and I did something and the left channel of my amp is now outputting 40 volts of dc. I have the channel pulled out of the chassis. I can see q1 and q2 are both blown. Anything else anyone can think of that might be a problem. ZD1,2,3 measure ok, M2 and Q9 measure fine. This was a SET build as well.
I built a dandy cap recharging wand. Copper rod, 3 watt 100 ohm resistor soldered to copper rod, other end with lead to ground to chassis, the entire thing insulated triple thick.
How long does this wand (or any resistor) to uncharge the caps. Other than hook it up and see what happens, 😀 not sure when it is discharged. A dmm seems to run all over the place, how to tell if dead besides sticking tongue on it! I'm stupid, but not that stupid.
Russellc
How long does this wand (or any resistor) to uncharge the caps. Other than hook it up and see what happens, 😀 not sure when it is discharged. A dmm seems to run all over the place, how to tell if dead besides sticking tongue on it! I'm stupid, but not that stupid.
Russellc
