abletec alc1000-1300

fransiscan · 6th October 2012, 08:53 PM

hope someone can help with a problem i have with these modules.i have sent messages to a couple of members but am waiting for a reply.
i have quite bad hum from the amps.this is my first attempt at assembling an amp, which is why i went for the abletec as they say it is almost plug and play.
i have wired for unbalanced rca connection but not sure if i need to connect pin 7 or 8 to negative input pin to ground the input.if so do i just jump across from pin 7 or 8 to the -input pin?
is this why i am getting the hum?
any help would be great.
thanks

rolls · 7th October 2012, 03:44 PM

Quote:

Originally Posted by fransiscan

hope someone can help with a problem i have with these modules.i have sent messages to a couple of members but am waiting for a reply.
i have quite bad hum from the amps.this is my first attempt at assembling an amp, which is why i went for the abletec as they say it is almost plug and play.
i have wired for unbalanced rca connection but not sure if i need to connect pin 7 or 8 to negative input pin to ground the input.if so do i just jump across from pin 7 or 8 to the -input pin?
is this why i am getting the hum?
any help would be great.
thanks

Indemini · 10:14 AM

Hi fransiscan

Sorry, i can't help you.
But for the other people this can be helpful.
Productsite
Datasheet look at site 4 and 5

rolls · 8th October 2012, 03:49 PM

Sorry, but my text vanished.
The amp has to be connected to ground:
- If the preamp is grounded, nothing has to be done.
- If not, connect 7 or 8 to ground
- If you have done both, there could be hum because of a ground loop

André

fransiscan · 11th October 2012, 07:47 AM

thanks for the help guys.sorted the hum by removing the mains earth.been told its fine as it is a double insulated product.

fransiscan · 29th December 2012, 04:48 AM

another question re the abletecs.for a first timer, how would i incorporate remote turn on from a pre-amp with 12volt trigger output.or how to enable standby from a signal sensing circuit.
thanks

6th October 2012, 08:53 PM	#1
fransiscan diyAudio Member Join Date: Oct 2011	abletec alc1000-1300 hope someone can help with a problem i have with these modules.i have sent messages to a couple of members but am waiting for a reply. i have quite bad hum from the amps.this is my first attempt at assembling an amp, which is why i went for the abletec as they say it is almost plug and play. i have wired for unbalanced rca connection but not sure if i need to connect pin 7 or 8 to negative input pin to ground the input.if so do i just jump across from pin 7 or 8 to the -input pin? is this why i am getting the hum? any help would be great. thanks

8th October 2012, 09:59 AM	#3
Indemini diyAudio Member Join Date: Jun 2012 Location: HSK, Germany	Hi fransiscan Sorry, i can't help you. But for the other people this can be helpful. Productsite Datasheet look at site 4 and 5 Last edited by Indemini; 8th October 2012 at 10:14 AM.

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8th October 2012, 03:49 PM	#4
rolls diyAudio Member Join Date: Aug 2007	Sorry, but my text vanished. The amp has to be connected to ground: - If the preamp is grounded, nothing has to be done. - If not, connect 7 or 8 to ground - If you have done both, there could be hum because of a ground loop André

11th October 2012, 07:47 AM	#5
fransiscan diyAudio Member Join Date: Oct 2011	thanks for the help guys.sorted the hum by removing the mains earth.been told its fine as it is a double insulated product.

29th December 2012, 04:48 AM	#6
fransiscan diyAudio Member Join Date: Oct 2011	another question re the abletecs.for a first timer, how would i incorporate remote turn on from a pre-amp with 12volt trigger output.or how to enable standby from a signal sensing circuit. thanks