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Re: Eico HF85... "persistent hum" [message #26628 is a reply to message #26624]

Mon, 25 June 2007 17:18

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

Disconnect the output from the HF85. Is the hum still there? If so, it's the amp, not the preamp.

Now disconnect the input to the HF85. Is the hum still there? If so, then it may be power supply hum or something else internal to the HF85. If not, it's the source. Check your ground, cables and source equipment.

Grounding problems are very common, so make sure your ground is good.

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[Message index]

		Eico HF85... "persistent hum" By: kraken on Sat, 23 June 2007 08:47
		Re: Eico HF85... "persistent hum" By: Wayne Parham on Mon, 25 June 2007 17:18
		Re: Eico HF85... "persistent hum" By: kraken on Fri, 29 June 2007 12:14
		Re: Eico HF85... "persistent hum" By: Wayne Parham on Sun, 01 July 2007 13:33
		Re: Eico HF85... "persistent hum" By: kraken on Sun, 01 July 2007 14:26
		Re: Eico HF85... "persistent hum" By: Wayne Parham on Thu, 05 July 2007 22:16

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