Any key differences in 5AR4 tubes in a PRRI?

Discussion in 'Glowing Bottle Tube Amp Forum' started by OzShadow, Nov 7, 2019 at 7:13 AM.

  1. slider313

    slider313 Tele-Afflicted Silver Supporter

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    The Tung Sol and Mullard brands are now owned by New Sensor Corp. They were never made in the Shuguang factory. However, Marshall branded tubes may be.
     
  2. Dacious

    Dacious Poster Extraordinaire

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    On the EL34s in a cathode biased amp, within a ma. I didn't measure the tubes that came out but I get a touch over 20 watts calculated. I think the Mini Jubilee is rated very conservatively for power wise. They've been in there a year and working fine. They looked identical to the ones that came out which were in a year, I think I cooked them on a 40 deg C day by tilting the amp back too far.

    Here's an eBay listing for this vendor.

    https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/232442076369

    Edit : actually this is not the vendor. I have to find one of my earlier purchases.
     
    Last edited: Nov 8, 2019 at 3:41 AM
  3. OzShadow

    OzShadow Tele-Meister Silver Supporter

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    I sent an email to the seller but I may also pickup a Sovtek locally. They're only $20 and I can tap on them to make sure they don't rattle.
     
    uriah1 likes this.
  4. Axis29

    Axis29 Poster Extraordinaire Ad Free Member

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    This was my solution for my old Twin (when the Ruby failed). But, I actually went with a WR4 to lower the B+ (and it works beautifully). But, I do have some W34's in case I want to push it back up again, or need one for a different amp. I've been really happy with my Copper Caps. I find they respond exactly like their tube counterparts.
     
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  5. OzShadow

    OzShadow Tele-Meister Silver Supporter

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    Whatever the Fender branded one was, it was a tiny bit taller than the Sovtek. The Sovtek may glow a bit more.
     
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