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Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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Dynaco-Doctor Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: Re: United Electron EL34 tubes? (in ST-70) posted by GlassJukie on May 21, 2006 at 08:16:13:
Mullard was a prime manufacturer for GZ34/5AR4 rectifiers. MANY American companies bought their tubes from Mullard and simply re-branded them as RCA or GE tubes (as did Dynaco). Later in the game, some US manufacturers made their own 5AR4's. There is absolutley NO difference between an RCA or GE 5AR4 that started life as a Mullard tube, and an actual Mullard branded tube. The critical thing when buying tubes on eBay is to know your seller. Feedback helps, but actually knowing that the seller is someone you can trust is MUCH more important.The order of preference for GZ34/5AR4 rectifiers is basically this:
1. NOS Mullard, or Mullard manufactured tubes from other makers.
2. American NOS 5AR4 rectifiers (NOT Mullard manufactured)Anything else is questionable. If you MUST use a current-production tube, avoid ANY Chinese sourced tubes. They tend to fail catastrophically. Russian tubes are only *slightly* less suspect. For longevity and reliability, NOTHING beats a NOS Mullard manufactured tube.
So-called "NEW Mullard" tubes have absolutely NOTHING in common with the old Mullard tubes. The Russians simply bought the name, just as they recently did with Tung-Sol. AVOID, AVOID, AVOID.
Of course, these are my own silly, personal opinions and are generally unencumbered by the thought process.
Bill
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Follow Ups
- Re: Mullard-based rectifiers - Bill Thomas 09:11:42 05/21/06 (1)
- I had my JJ arc - Paully 17:33:15 05/21/06 (0)
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