Tubes Asylum

Replacement of 5Z4P tube

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Tubers

I recently took the delivery of a cheap Chinese SE amplifier. It has two 6L6G tubes, two 6N8P tubes (which I subsequently replaced with 6SN7WGT tubes) and one 5Z4P rectifier.

I believe it would be unreasonable to pay $350-$400 for a pair of RCA 6L6GC tubes when the amplifier costs $300.0 incl. shipment, but is there any reason in replacing the 5Z4P tube with its vintage equivalent? Does it influence the sound?

Follow Ups:

RE: Replacement of 5Z4P tube - Eli Duttman 11:11:27 06/03/12 (2)
The 6L6s are the easy part. Get some Russian 6П3С-E (6p3s-e3) stock from a reliable vendor, like AA sponsor Jim McShane.

The rectifier is indirectly heated, but seems to resemble the 5Y3. U.S. made types of that character are the 6087/5Y3WGTB and the 6106.

Eli D.
- Chinese 5Z4P Data Sheet (Open in New Window)
- RE: Replacement of 5Z4P tube - Tubers 11:58:44 06/03/12 (1)
  Other sources suggest that GZ30 is the closest analog.
  - RE: Replacement of 5Z4P tube - Eli Duttman 15:44:42 06/03/12 (0)
    IIRC, a GZ30 is mighty close to the U.S. 5Z4. Mullard made GZ30s will carry hefty price tags.
    
    Be very careful with Chinese types. For instance, the 5Z3P is a 5U4 "equivalent", with an Octal base. A U.S. made 5Z3 is electrically equivalent to the 5U4G, BUT the base is (sic) UX4.
    
    Eli D.

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