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Best Valve pre-amp match for ME 550 amp
Best Valve pre-amp match for ME 550 amp
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Old 14th January 2013, 05:17 AM   #91
TigerScent is offline TigerScent  Australia
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Im certain - If we apply ourselves Zaph, we can do it - that is the challenge, it must be possible...

...and yes, when I rewire the output channel wires with silver wire, I will listen to the pre-amp from you as well...

Last edited by TigerScent; 14th January 2013 at 05:34 AM.
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Old 14th January 2013, 05:28 AM   #92
Zaphod Beeblebrox is offline Zaphod Beeblebrox  Australia
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Silver wire is merely fiddling with the edges. Why do you imagine silver wire will make any difference? I would suggest that the high cost of silver wire could be put into something more meaningful (like a nice, second hand ME preamp).
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Old 14th January 2013, 09:32 AM   #93
TigerScent is offline TigerScent  Australia
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Yes, I agree - using the silver wire in a second hand ME preamp would certainly be a significant and meaningful venture - but I also believe it would be meaningful using it in the ME 550 amp

Last edited by TigerScent; 14th January 2013 at 09:57 AM.
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Old 14th January 2013, 10:07 AM   #94
Zaphod Beeblebrox is offline Zaphod Beeblebrox  Australia
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Why?
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Old 14th January 2013, 11:15 AM   #95
lordearl is offline lordearl  Australia
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Start with rod elliott's P88 circuit - it is less than $100 to build, sounds far better than any cheap tube preamp.
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Old 14th January 2013, 01:12 PM   #96
TigerScent is offline TigerScent  Australia
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Thanks for that - appreciate it, however if (actually when) I use a SS pre-amp, I will clearly go with ME preamps - as far as SS goes, however, I have a fascination with experimenting with a valve preamp at present...., if this one does not work well, then might try another ie: aikido etc...but I am going to get one to work well....
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Old 14th January 2013, 10:44 PM   #97
TigerScent is offline TigerScent  Australia
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Which cheap tube preamps have you compared this circuit with?
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Old 14th January 2013, 11:49 PM   #98
Zaphod Beeblebrox is offline Zaphod Beeblebrox  Australia
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Rod Elliot's preamp is competent, but uninspired. It exhibits a 100 Ohm output impedance and will, accordingly, perform much better than any of the valve preamps you are considering. Like 99.9999% of all preamps (valve and SS), it uses a large amount of global NFB. Your ME550 uses no global NFB, as do all the ME preamps.

Take my offer. Try an ME preamp. You will quickly dispense with your time-wasting exercise.
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Old 14th January 2013, 11:50 PM   #99
lordearl is offline lordearl  Australia
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Quote:
Originally Posted by TigerScent View Post
Yes, I agree - using the silver wire in a second hand ME preamp would certainly be a significant and meaningful venture - but I also believe it would be meaningful using it in the ME 550 amp
Why?

Quote:
Originally Posted by TigerScent View Post
Which cheap tube preamps have you compared this circuit with?
Many.

If you want quite a good one, try Arjen helder's valve preamp - it is hybrid so has a quite a low output impedance and you can play with any number of different valves.

Btw - keep the silver wire for when you acquire a girlfriend. You won't notice it in your amp, but she will love it around her wrist.

Quote:
Originally Posted by Zaphod Beeblebrox View Post
Rod Elliot's preamp is competent, but uninspired.
Have you listened to it with AD825?
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Old 15th January 2013, 03:19 AM   #100
TigerScent is offline TigerScent  Australia
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I had a look at it. How is it better than this one?:

JP-200 JP200 Valve Tube Preamplifier Amplifier Bare PCB (Stereo), based on Jadis | eBay

This one looks like it would fit the bill, just need audio trans (or maybe 2nd cathode follower?) to lower impedance...

Why do you believe Arjen Helders preamp is better?
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