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Post subject: Fender Hot Rod Deluxe Constant Hum
Posted: Tue Jul 05, 2011 2:04 pm
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Joined: Tue Jul 05, 2011 1:59 pm
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Hi

I have a Hot Rod Deluxe and there seems to be a constant hum coming from the amp that gets louder when I turn up the volume but not much. I have changed out the stock tubes (both preamp and power) since I found that preamp tube 1 was microphonic however which ever tube I put into slot 1 and tap with a pencil I get a loud tapping sound that comes through the speaker. Could this be a dry solder joint with the connectors for the preamp tube socket?

The hum is there with nothing plugged in and although I have changed the speaker to a celestion vintage 30 the sound is still slightly muddy at high volumes. When I sustain a note I can hear a fuzzy sound that distorts the note even with the reverb off.

Any help would be appreciated

Adam


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Post subject: Re: Fender Hot Rod Deluxe Constant Hum
Posted: Tue Jul 05, 2011 2:17 pm
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Joined: Wed Mar 31, 2010 12:48 am
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Location: Tombstone Territory
Power supply filter and bias caps are likely the cause of that beautiful hum.

The OEM IL's are crap......period, end of story, nothing follows.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Fender Hot Rod Deluxe Constant Hum
Posted: Tue Jul 05, 2011 6:10 pm
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Retroverbial wrote:
Power supply filter...caps...


+1, That was my first thought also. :idea:

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Post subject: Re: Fender Hot Rod Deluxe Constant Hum
Posted: Wed Jul 06, 2011 4:23 am
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Bad solders on power supply , on filter caps circuit ?


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