hum in fisher 800c phono section

slhoward · 3rd March 2007, 08:34 PM

I have a fisher 800c reciever and since the day I got it it has had a hum in the phono and tape hd circuit. It is only in one channel, and does not show up in the Auxilary or radio functions. Which tells me that it is probably not the power supply or it would be across the board??? Help Help Help. Capacitor, bad ground??

Steve

Netlist · 3rd March 2007, 08:43 PM

Steve
I suspect bad grounding in the first place if the hum occurs only whith connected sources.
Check for bad solderings at the input connectors.

/Hugo

Netlist · 3rd March 2007, 08:53 PM

Isn't the 800c a tube receiver? Let us know and I'll move your topic to the tubes forum.

/Hugo

slhoward · 4th March 2007, 03:41 PM

Sorry, I am new to this thread yes the 800c is a tube receiver.

Netlist · 4th March 2007, 03:43 PM

So, now you are among the real tube guys.

/Hugo

3rd March 2007, 08:34 PM	#1
slhoward diyAudio Member Join Date: Mar 2007	hum in fisher 800c phono section I have a fisher 800c reciever and since the day I got it it has had a hum in the phono and tape hd circuit. It is only in one channel, and does not show up in the Auxilary or radio functions. Which tells me that it is probably not the power supply or it would be across the board??? Help Help Help. Capacitor, bad ground?? Steve

4th March 2007, 03:41 PM	#4
slhoward diyAudio Member Join Date: Mar 2007	fisher 800c Sorry, I am new to this thread yes the 800c is a tube receiver.

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3rd March 2007, 08:43 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Steve I suspect bad grounding in the first place if the hum occurs only whith connected sources. Check for bad solderings at the input connectors. /Hugo

3rd March 2007, 08:53 PM	#3
Netlist diyAudio Moderator Join Date: Jan 2003	Isn't the 800c a tube receiver? Let us know and I'll move your topic to the tubes forum. /Hugo

4th March 2007, 03:43 PM	#5
Netlist diyAudio Moderator Join Date: Jan 2003	So, now you are among the real tube guys. /Hugo

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