Vintage Mullard 5ar4 tube

Ern Dog
Ern Dog Posts: 2,237
edited May 2012 in Wanted (WTB) Classifieds
Hi Everyone,
I'm looking for a good deal on a single vintage Mullard 5ar4 NOS (or used but with lots of life left).

I'll be using this rectifier tube in the power supply of my Modwright tube Oppo 83. My current Mullard is slowly dying :sad: so I want to be ready with the back up.

Thanks,
Ernie
Post edited by Ern Dog on
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Comments

  • heiney9
    heiney9 Posts: 25,165
    edited May 2012
    Really, it's dying? These last forever. I might have one for you, let me check when I get home. They are used and I don't have a tester. I am on the fence about selling the amp I use these in so I won't have a need in the future. How do you know it's dying?

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • Fongolio
    Fongolio Posts: 3,516
    edited May 2012
    Just for information, I was using a Mullard 5AR4 in my Eico ST-70 integrated until a mod I did toasted one side of it (since fixed) I picked up an old Amperex Bugle Boy 5AR4 and I can't tell the difference. I would say it performs as an equal to the Mullard. I also used a new Shuguang 5AR4 and it was good but didn't seem as good at holding bias voltages.
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  • Ern Dog
    Ern Dog Posts: 2,237
    edited May 2012
    heiney9 wrote: »
    Really, it's dying? These last forever. I might have one for you, let me check when I get home. They are used and I don't have a tester. I am on the fence about selling the amp I use these in so I won't have a need in the future. How do you know it's dying?

    H9

    Lately I've been hearing static and small pops and distortion for about the first 20 minutes after firing up the tube. It never used to do that before. After it is warmed up, it sounds great. I take this to mean the tube is dying. I bought it used in 2010 and listen to music several hours every day. I thought it would have lasted longer.

    Fongolio wrote: »
    Just for information, I was using a Mullard 5AR4 in my Eico ST-70 integrated until a mod I did toasted one side of it (since fixed) I picked up an old Amperex Bugle Boy 5AR4 and I can't tell the difference. I would say it performs as an equal to the Mullard. I also used a new Shuguang 5AR4 and it was good but didn't seem as good at holding bias voltages.

    That's good to know about alternate tubes. thanks
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