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Post by shiner51 on Sept 6, 2019 5:41:43 GMT -7
I replaced the 6V6s in my Z lux with 5881s a while back and really like the sound of the amp much better, seems to have a lot more headroom. I was wondering if it is safe to put 5881s in my Z Plus? Also, same question regarding a Princeton Reissue, is safe to do and what results can I expect if its ok. Thanks!
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Post by purpletele on Sept 6, 2019 7:27:11 GMT -7
I replaced the 6V6s in my Z lux with 5881s a while back and really like the sound of the amp much better, seems to have a lot more headroom. I was wondering if it is safe to put 5881s in my Z Plus? Also, same question regarding a Princeton Reissue, is safe to do and what results can I expect if its ok. Thanks! I don't have your answer, but be very very careful with the information you receive. 5881's have a higher voltage requirement I believe, I tried them on an amp I had built and I caused some serious damage. I seriously doubt the Princeton Reissue will receive 5881's Keep searching, I'll look as well.
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Post by jhen86 (jordan) on Jul 1, 2020 12:46:13 GMT -7
You really should check with repairs@drzamps.com. No way of knowing without knowing the specs of the power transformers.
5881 will need to see considerably more heater current from the power transformer and ideally less plate voltage on the power tubes themselves. Not to mention the tubes needing to be rebiased.
As for a Princeton, I’ve been researching the same thing as I just built one. Two conflicting views:
1) Don’t do it. There’s not enough heater current available from the Power Transformer. Again, would need all the specs from Fender to make an educated decision. Could try it but it is possible you could fry your power transformer and output transformer. Likely? I’m not sure.
2) You can do 5881’s but you really need to use a plug in solid state rectifier (ready available online) and then run the amp into a 4 ohm load to (or two 8 ohm cabs through the two output jacks - for 4 ohm total).
Mind you. Biasing the 5881 hot enough in a Princeton will really diminish the intensity of the vibrato. Not a deal breaker if you don’t use it, but you’ll likely be pretty disappointed if you do use it. Solving one problem just to create another.
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