UCD180 questions - Page 89

audiorasp · 2nd November 2004, 01:44 AM

Hello,

If you want to switch your amps on and off only by a front panel power switch, just connect /ON to the amp power supply ground.

George

ewildgoose · 2nd November 2004, 07:34 AM

Just to clarify. You connect the "ON" line to ground to make the amps switch on... In the case of the Zappulse units you connect a similar connection to ground to turn them off (well into standby).

On a related note: Can anyone describe what they might do to have remote start and stop of these two types of amp? ie, I have a homebuilt pre-amp which has some spare outputs that I could use to do remote switching on/off all my amps.

Since they each flip in different directions, and also that connecting all the amp grounds together is unlikely to be clever, anyone got any clever ideas for using a relay to remotely flip em on and off?

Is it best to have a design where power needs to be applied continuously to some input line to switch the amps on? If the connection is removed then power goes away. Or perhaps it's better to have a three line input and pull one switch each way to make it flip-flop (with the default perhaps being "on").

Any thoughts on a nice design for this (preferably quite simple since it's going to have to be retro fitted in my case...)

wytco0 · 2nd November 2004, 03:56 PM

Ed, what is the latch supply on the preditor? I put a link from my UCD modules to the Power GND and the blue light came on after a couple of seconds. How have you wired your?

Cherhit, thanks.

Jan-Peter · 2nd November 2004, 06:32 PM

[QUOTE] Maxlorenz;
Would you be kind and tell us, humble beginners, if we need smaller caps after these large cans?[?QUOTE]

No not necessary, better use one good cap.

Quote:

Wytco;
Hi I am just about to connect up my UCD180's but I am a bit confused about how to connect the /ON (internal pull-up) pin?
I want to switch my amp on via a mains switch on the front panel. What should I do?

You can put the /ON always on the GND line, but you can have some noises when you switch the amp off. Because the capacitors are discharging quit slow so you don't have a fast/sharp moment when the amps switch off. Please use the circuit in the attachment, every small NPN transistor will work. AC1 and AC2 are the secondairy voltages.

Regards,

Jan-Peter

wytco0 · 2nd November 2004, 06:42 PM

Jan Peter, thanks for that, I watched the capacitor discharge on my DMM and as you suggest it takes several seconds, however I want to get my amp running so for the moment I will just do it from the gnd.

Jan-Peter · 2nd November 2004, 07:36 PM

OK.

And what about the sound of the UcD?

Regards,

Jan-Peter

wytco0 · 2nd November 2004, 08:41 PM

Well its up and running first impressions after about 30 minutes of listening, very dynamic and clear, slightly sibilant but that may be my speakers. Overall very very nice sound.

Modules are running very cool and so far no problems at all.

The switch on and off thump is minor less that the Music Fidelity I was using before.

wytco0 · 3rd November 2004, 02:21 AM

Here is a picture of my amp, its built into an old Music Fidelity case but this is temporary.

The picture is over a Meg so its a link :-

wytco0 amp

mac · 3rd November 2004, 08:08 AM

How does the UdC180 do with highly capacitive loads? Has anyone used these modules to drive full range electrostatic speakers or high-capacitance speaker wire, like Polk Cobra Cable? TIA, mac.

ewildgoose · 3rd November 2004, 09:30 AM

wytco0: Have you thought about using shorter wires...? Probably you could turn the PS around and make those wires extremely direct. Also, I'm sure the source and speaker wires would prefer to be a little shorter?

Anyone: is there any point seperating the modules? Do they interfere in any respect?

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2nd November 2004, 01:44 AM	#881
audiorasp diyAudio Member Join Date: Feb 2001 Location: Sacramento, CA	Hello, If you want to switch your amps on and off only by a front panel power switch, just connect /ON to the amp power supply ground. George

2nd November 2004, 07:34 AM	#882
ewildgoose diyAudio Member Join Date: Jan 2004 Location: London	Just to clarify. You connect the "ON" line to ground to make the amps switch on... In the case of the Zappulse units you connect a similar connection to ground to turn them off (well into standby). On a related note: Can anyone describe what they might do to have remote start and stop of these two types of amp? ie, I have a homebuilt pre-amp which has some spare outputs that I could use to do remote switching on/off all my amps. Since they each flip in different directions, and also that connecting all the amp grounds together is unlikely to be clever, anyone got any clever ideas for using a relay to remotely flip em on and off? Is it best to have a design where power needs to be applied continuously to some input line to switch the amps on? If the connection is removed then power goes away. Or perhaps it's better to have a three line input and pull one switch each way to make it flip-flop (with the default perhaps being "on"). Any thoughts on a nice design for this (preferably quite simple since it's going to have to be retro fitted in my case...)

2nd November 2004, 03:56 PM	#883
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	Ed, what is the latch supply on the preditor? I put a link from my UCD modules to the Power GND and the blue light came on after a couple of seconds. How have you wired your? Cherhit, thanks.

2nd November 2004, 06:42 PM	#885
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	Jan Peter, thanks for that, I watched the capacitor discharge on my DMM and as you suggest it takes several seconds, however I want to get my amp running so for the moment I will just do it from the gnd.

2nd November 2004, 07:36 PM	#886
Jan-Peter diyAudio Member Join Date: Sep 2003 Location: -	OK. And what about the sound of the UcD? Regards, Jan-Peter

2nd November 2004, 08:41 PM	#887
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	Well its up and running first impressions after about 30 minutes of listening, very dynamic and clear, slightly sibilant but that may be my speakers. Overall very very nice sound. Modules are running very cool and so far no problems at all. The switch on and off thump is minor less that the Music Fidelity I was using before.

3rd November 2004, 02:21 AM	#888
wytco0 diyAudio Member Join Date: Apr 2004 Location: Hastings	Here is a picture of my amp, its built into an old Music Fidelity case but this is temporary. The picture is over a Meg so its a link :- wytco0 amp

3rd November 2004, 08:08 AM	#889
mac diyAudio Member Join Date: May 2003 Location: Puget Sound	How does the UdC180 do with highly capacitive loads? Has anyone used these modules to drive full range electrostatic speakers or high-capacitance speaker wire, like Polk Cobra Cable? TIA, mac.

3rd November 2004, 09:30 AM	#890
ewildgoose diyAudio Member Join Date: Jan 2004 Location: London	wytco0: Have you thought about using shorter wires...? Probably you could turn the PS around and make those wires extremely direct. Also, I'm sure the source and speaker wires would prefer to be a little shorter? Anyone: is there any point seperating the modules? Do they interfere in any respect?

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