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6P15P - matched tubes, same factory and different dates

178.39.93.56
Posted on May 11, 2022 at 07:19:04
Yoshimitsu
Audiophile

Posts: 12
Location: Ticino
Joined: February 27, 2020
 Hi

I was looking for some 6P15P tubes from the Orzep factory. I found a matched quartet that measure the same but are from different dates. Can they be paired with each other?

If I am reading it correctly they are from 1980, 1991, 1977, 1982.

https://imgur.com/a/Nz5Ge1X

 

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RE: 6P15P - matched tubes, same factory and different dates, posted on May 11, 2022 at 14:03:20
Spantou
Audiophile

Posts: 115
Location: Central Illinois
Joined: October 5, 2016
 I agree with 6bq5 that the manufacturing dates should not have much effect on sound quality over the 14 year period these tube were made. Personally, I would not hesitate to use them. More important that the matching was performed correctly.

Out of curiosity, why are you specifically looking for Orzep factory tubes. 6P15P tubes in general (also -ev military version) still seem plentiful and perhaps you could buy well match tubes of the same/similar date code. What amplifier are you using the tubes in?

 

RE: 6P15P - matched tubes, same factory and different dates, posted on May 12, 2022 at 08:38:06
Yoshimitsu
Audiophile

Posts: 12
Location: Ticino
Joined: February 27, 2020
 I am using a custom made amplifier using it for headphones, it's similar to the Decware Zen.

Someone reported that these 6p15p tubes for Orzep sound much better than the 6p15p-ev. I wanna see that for myself.

I will try the Hazen mod in my amp.

 

RE: 6P15P - matched tubes, same factory and different dates, posted on May 12, 2022 at 11:52:09
Spantou
Audiophile

Posts: 115
Location: Central Illinois
Joined: October 5, 2016
 Thanks. That makes sense why you want to try the Orzep tubes. Good luck. Let us know what you found out.

 

RE: 6P15P - matched tubes, same factory and different dates, posted on May 11, 2022 at 11:47:43
6bq5
Audiophile

Posts: 4385
Location: SF Bay
Joined: August 16, 2001
 ostensibly the date of manufacture should not affect the operation of the tube-
Presuming that the tubes have low hours of usage, and the matching is relevant- you should be good to go
Happy Listening

 

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