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Old 20th September 2017, 01:32 AM   #1
HarryY is offline HarryY  United States
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Default Questions about TU-8500 Preamp

I just ordered a TU-8500 Pre-amp

If I recall correctly I read that some prefer a 12AT7 over the 12AU7.

Anything I should know about it?
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Old 20th September 2017, 07:01 AM   #2
vkung is offline vkung  Canada
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12AT7 has the lowest impedance
You can use 12AT7/!2AU7/5965A..
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Old 20th September 2017, 12:59 PM   #3
HarryY is offline HarryY  United States
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Quote:
Originally Posted by vkung View Post
12AT7 has the lowest impedance
You can use 12AT7/!2AU7/5965A..
Thank you
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Old 4th October 2017, 05:10 AM   #4
Wansmith is offline Wansmith  Australia
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Hi there - I have a question about upgrading the coupling caps of the TU8500. What is the recommended coupling caps to upgrade to?
I recall mention somewhere that the mundorf silver/gold ones are too large to fit, so I want to ensure I get the model of the caps exactly correct.

Also - is there a difference between the TI OPA2227p and the BB OPA2227p?
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Old 29th October 2017, 03:58 AM   #5
HarryY is offline HarryY  United States
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I used Sprague orange drops 716p a tight fit but they fit.
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