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Hartke 3500 "hiss" with tube pre-amp?


Dm711

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Hi Everybody,

 

I am curious if there are any other Hartke 3500 owners out there that have experienced a "hiss" when using the head's tube pre-amp. I hear it when I have the solid state amp turned down to 0 and the tube pre-amp turned up to about 5 and master on 2 with the EQ flat. I was expecting more hiss with the solid state pre-amp than with the tube. However, the solid state pre-amp is quiet as a mouse! I was under the impression that, in general, tubes are quieter than solid state. (Granted that is a generalization.) Am I getting that wrong? Suggestions?

 

Thanks,

 

Dm7

http://www.paintedharmony.com

Dm7#11. It's a sad chord in "...the saddest of all keys, really."

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its not real tubes though. So it might be something with the tube emulator ciruit. (12AX7 right? lol thats all of em)
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Originally posted by phil6006:

its not real tubes though. So it might be something with the tube emulator ciruit. (12AX7 right? lol thats all of em)

:confused: The 3500 has a preamp tube unless I'm out of my mind.

 

Phil, a 12AX7 is a tube, albeit a preamp tube. It's nearly universal. These are VERY different than power tubes (and a lot smaller).

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Originally posted by Dm7#11:

I was under the impression that, in general, tubes are quieter than solid state. (Granted that is a generalization.) Am I getting that wrong? Suggestions?

It really depends on the way the circuit was designed. I'm not an engineer, but I enjoy noodling a bit.

 

Best bet for some cheap thrills is to swap the current 12AX7 (which is probably a VERY cheap Chinese tube) with something a little more posh. Try The Tube Store for some fun. I have no affiliation.

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It didn't click to me to try with tube / solid state settings, I had similar problem with tube / solid set to 12'O clock with my 3500. Note that your amp has a two-pin cable and the simplest solution is to change it to a three-pin.

You have a grounding problem and bf you do this, pulg in the bass to your hi-fi system,(if its a two pin -plug ) and see if it hisses. If the answer is yes, change the bass amp's cable end 2 to 3 pins. There'd be no more hiss. It worked for me.

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Originally posted by getz76:

Originally posted by phil6006:

its not real tubes though. So it might be something with the tube emulator ciruit. (12AX7 right? lol thats all of em)

:confused: The 3500 has a preamp tube unless I'm out of my mind.

 

Phil, a 12AX7 is a tube, albeit a preamp tube. It's nearly universal. These are VERY different than power tubes (and a lot smaller).

sorry. I thought I remember it saying it had a tube emulator circuit.
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Originally posted by Dm7#11:

...However, the solid state pre-amp is quiet as a mouse! I was under the impression that, in general, tubes are quieter than solid state. (Granted that is a generalization.) Am I getting that wrong?

My impression has always been that solid state is usually quieter than tubes.

spreadluv

 

Fanboy? Why, yes! Nordstrand Pickups and Guitars.

Messiaen knew how to parlay the funk.

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My guitarist got rid of any slight hiss I got out of my 3500. All he had to do was knock it over, so instead it made a horrible buzz. Then, after waiting for a few months for sam ash to fix it, they finally realized they lost it. Now its quiet, and gone.

 

Another Day Wasted

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