AA1800 bias resistors

eds65gto · 15th December 2004, 10:28 PM

Does anyone know which bias resistors go bad in the Heath AA1800 amp? This makes the channel output level vary. It looks like the two 3.3k 2w resistors. Are there any others that go bad?
Thanks Ed

destroyer X · 16th December 2004, 07:56 AM

Try to put, at least a partial schematic, in special the bias portion.

regards,

Carlos

rrcrain · 20th January 2005, 03:21 PM

Any of the carbon resistors can go bad, but none have to date in the two amps I own. Perhaps I'm just luck so far. I do need to start searching for replacement electrolytics in the amsp in any event. Those puppies have a limited lifetime at best and it's best to replace them before they fail.

15th December 2004, 10:28 PM	#1
eds65gto diyAudio Member Join Date: Dec 2004 Location: Mt Pleasant Sc	AA1800 bias resistors Does anyone know which bias resistors go bad in the Heath AA1800 amp? This makes the channel output level vary. It looks like the two 3.3k 2w resistors. Are there any others that go bad? Thanks Ed

16th December 2004, 07:56 AM	#2
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	If you have the schematic, will be easier to help you Try to put, at least a partial schematic, in special the bias portion. regards, Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!.. when not work first time, then becomes a nice challenge...and we usually overcome the trouble... and we feel very well to be mastering the machine.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Bias Protection Resistors in DC Coupled Amp	dsavitsk	Tubes / Valves	6	23rd August 2009 01:53 AM
Bias Supply resistors	AmpBuilder225	Tubes / Valves	14	19th April 2009 12:34 AM
400A, emitter resistors and bias: I would learn	Mywing	Pass Labs	6	5th June 2008 04:19 PM
Push-Pull Cathode Bias Resistors	Kashmire	Tubes / Valves	5	6th January 2008 07:38 PM
quick bias tolerance question...across source resistors	Mattyo5	Solid State	6	12th October 2003 11:09 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

20th January 2005, 03:21 PM	#3
rrcrain diyAudio Member Join Date: Jan 2005 Location: Illinois	Any of the carbon resistors can go bad, but none have to date in the two amps I own. Perhaps I'm just luck so far. I do need to start searching for replacement electrolytics in the amsp in any event. Those puppies have a limited lifetime at best and it's best to replace them before they fail.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)