Hi J-P,
No, the connector housings were sold individually. I ordered 10 of each type so I have some to experiment with. The pins are sold in rows of 100 (cut from a reel I think), but they were rediculously cheap.
Even though I also bought some class II mains inlets, the shipping was still more expensive than the sum of the parts. 😱
Mind you, the pins are crimp on (I'm going to use pliers and solder in lack of crimp tools), but they're basically not re-usable.
If I recall correctly, you'll need 13 small pins (8+3+2) and 4 large pins (mains in + speaker out) for each board, provided that you don't connect anything to the board's DC power output.
SO, if you want to experiment, and don't count on always getting the final set-up in the first attempt, you might as well order plenty. The parts are cheap.
Log on to www.digikey.co.uk and find your nearest country (if it really differs, which I doubt).
Jennice
No, the connector housings were sold individually. I ordered 10 of each type so I have some to experiment with. The pins are sold in rows of 100 (cut from a reel I think), but they were rediculously cheap.
Even though I also bought some class II mains inlets, the shipping was still more expensive than the sum of the parts. 😱
Mind you, the pins are crimp on (I'm going to use pliers and solder in lack of crimp tools), but they're basically not re-usable.
If I recall correctly, you'll need 13 small pins (8+3+2) and 4 large pins (mains in + speaker out) for each board, provided that you don't connect anything to the board's DC power output.
SO, if you want to experiment, and don't count on always getting the final set-up in the first attempt, you might as well order plenty. The parts are cheap.
Log on to www.digikey.co.uk and find your nearest country (if it really differs, which I doubt).
Jennice
"provided that you don't connect anything to the board's DC power output. "
let me know if someone heads to that direction , as with 200ac in the datasheet.
let me know if someone heads to that direction , as with 200ac in the datasheet.
According to the data sheet the DC output is:
"±12V (max.200mA) DC output for powering external circuitry"
"±12V (max.200mA) DC output for powering external circuitry"
john65b said:
Given that the module is only rated at 40W continuous @ 25C ambient, I would say ~1-2A. It can probably do a lot more than that short term, but it will heat up fast.
MashBill
The 12 V isn't the only DC output.
There's also a 47V DC power output, but I can't see it's power rating. I think it's called terminal "J1"
The 12 V isn't the only DC output.
There's also a 47V DC power output, but I can't see it's power rating. I think it's called terminal "J1"
The first module is playing! 😀
So far I've only tested it on a cheap speaker, to make sure I got it wired up correctly, but it's playing.
A little advise: Remember to consider the J4 (auto-on) jumper.
So far I've only tested it on a cheap speaker, to make sure I got it wired up correctly, but it's playing.
A little advise: Remember to consider the J4 (auto-on) jumper.
Got them !
Hi, I received the modules today. Packed to survive a nuclear attack. All modules carry the same datecodes.
Now I have to order the connectors to make them sing.
Thanks Yf.
Hi, I received the modules today. Packed to survive a nuclear attack. All modules carry the same datecodes.
Now I have to order the connectors to make them sing.
Thanks Yf.
grounding the B&O ASC200 ICEPOWER modules
Can anyone give advise how to ground 2 B&O ASC200 boards in one metal housing. The datasheet does not say anything about this. Other B&O modules are connected directly ground-to-housing. Other B&O modules are connected through 10K//30nF or even 10K//10nF to ground. Hope anyone could give advise in this.
I ordered also 2 B&O ASC200 boards at Ebay; guess they will arrive this week.
Wim
Can anyone give advise how to ground 2 B&O ASC200 boards in one metal housing. The datasheet does not say anything about this. Other B&O modules are connected directly ground-to-housing. Other B&O modules are connected through 10K//30nF or even 10K//10nF to ground. Hope anyone could give advise in this.
I ordered also 2 B&O ASC200 boards at Ebay; guess they will arrive this week.
Wim
Hello Wim,
I am having the same thoughts.
Since the boards just have a Line & Neutral mains input, and no safety earth terminal, this indicates that they are class II units, consequently having complete isolation (except possibly for a small capacitance).
Therefore, it should be safe to tie the two mains "neutral" pins of the two boards together for the mains inlet, and only have the signal ground terminals connected to the enclosure at one point.
(Your mains inlet will paobably not have a ground pin).
Any other views or suggestions welcome.
Jennice
I am having the same thoughts.
Since the boards just have a Line & Neutral mains input, and no safety earth terminal, this indicates that they are class II units, consequently having complete isolation (except possibly for a small capacitance).
Therefore, it should be safe to tie the two mains "neutral" pins of the two boards together for the mains inlet, and only have the signal ground terminals connected to the enclosure at one point.
(Your mains inlet will paobably not have a ground pin).
Any other views or suggestions welcome.
Jennice
I can agree on this and will try this at first. I will post my experiences with these boards on this forum.
Dan Fraser (senior engineer at a famous professional audio company who worked with the B&O modules) wrote the following: "I keep my audio circuits totally isolated from the housing, pre-amp and everything and then make one and only one connection to the housing usually with a zero ohm jumper. But you could try a resistor as well if you get noise."
use of ASC200 boards in US made amplifiers
The ASC200 board is used in the following US amde amplifiers:
Jeff Rowland Model 102 - 2 boards
Cary Audio CAA1 - 2 boards
Bel Canto - M300 - 1 board
Bel Canto - S300 - 2 boards
I included a compilation photo with some insde overviews of the above mentioned amps.
Wim
The ASC200 board is used in the following US amde amplifiers:
Jeff Rowland Model 102 - 2 boards
Cary Audio CAA1 - 2 boards
Bel Canto - M300 - 1 board
Bel Canto - S300 - 2 boards
I included a compilation photo with some insde overviews of the above mentioned amps.
Wim
Attachments
The PCBs have a cap and a resistor connected to the center hole. I suppose that is the one that can be connected to safety earth/ground. However, one of those parts is shorted with a jumper.
BTW Wim, Dan Fraser probably is a good engineer but connecting the (signal) ground of audio electronics wit zero Ohm to a case which is connected to safety ground/earth is not good engineering. That is if I understood correctly what he does. RF can creep in that way and so it can pollute (signal) ground. That is one of the reasons a resistor and cap in parallel are used most of the time.
Does anyone know what the solder blobs on the PCB are ? I guess they are for offset trimming ?!
BTW Wim, Dan Fraser probably is a good engineer but connecting the (signal) ground of audio electronics wit zero Ohm to a case which is connected to safety ground/earth is not good engineering. That is if I understood correctly what he does. RF can creep in that way and so it can pollute (signal) ground. That is one of the reasons a resistor and cap in parallel are used most of the time.
Does anyone know what the solder blobs on the PCB are ? I guess they are for offset trimming ?!
Re: use of ASC200 boards in US made amplifiers
It could be fun (for us wierdos anyway) if these amps received very different reviews. 😀
Jennice
wimdehaan said:
It could be fun (for us wierdos anyway) if these amps received very different reviews. 😀
Jennice
jean-paul said:
I'm not sure I understand this reasoning.
In some industaial amps the resistor / cap combination is supposed to do the opposite.
At LF, the cap is high resistance. This way, the resistor dominates, providing some reference, but not enough to cause LF ground loops or mains frequency humming.
At RF, the cap is virtually shortening the resistor (if the cap is good), thereby connecting the signal ground to the enclosure. This gives an effective shielding against radiated RF.
These units are class II supplies, so they need not (not intended to) be connected to safety ground.
- Status
- Not open for further replies.