Restoring a Threshold FET 10e - a few questions - Page 3 - diyAudio
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Old 1st October 2011, 01:09 AM   #21
Lavcat is offline Lavcat  United States
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Quote:
Originally Posted by john curl View Post
Sounds like a good start. We have found that this particular preamp really benefits from a strong power supply, meaning big caps, big transformer and high speed diodes. Sold one to Gordon Holt once, just from an A-B listening test.
I bought my FET ten/hl based on Gordon Holt's review. At the time I could not afford an upgraded supply as Gordon recommended, and I still can't. But a new supply is possibly my next project after I finish what I'm working on.

The previous FET 9/10 thread had some power supply ideas. Are there any others?

On a related subject, can anyone tell me what the proper tool is for removing the top cover screws of the FET ten/hl?
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Old 1st October 2011, 04:01 AM   #22
GaryB is offline GaryB  United States
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Originally Posted by Lavcat View Post
On a related subject, can anyone tell me what the proper tool is for removing the top cover screws of the FET ten/hl?
1/16" allen wrench is the size you want. In a pinch you can use a 1.5mm wrench - it's a bit undersized but will work.

---Gary
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Old 1st October 2011, 04:03 PM   #23
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Why not run a battery power supply and be done with it. Cheaper too!
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Old 3rd October 2011, 04:58 AM   #24
GaryB is offline GaryB  United States
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Originally Posted by bigfishe View Post
Why not run a battery power supply and be done with it. Cheaper too!
Have you compared a battery supply to a really well built conventional supply?
I confess that I haven't but I have learned that making a really good conventional AC supply isn't easy. Bigger transformers, good quality diodes, snubbers, good electrolytic caps and film bypass caps, all seem to make a difference.
Somehow, the idea of batteries never appealed to me. But I'd be interested in hearing from anyone who's done a comparison of over the top battery power to over the top AC supplies.

---Gary
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Old 3rd October 2011, 07:33 PM   #25
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My SL-10 is battery powered.I talked to MrPass about it and he said it's as good as it gets.Think about it. Zero noise and all the current you need. Preamps do not need alot of battery and mine last a month before needing a charge.
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Old 3rd October 2011, 11:46 PM   #26
Lavcat is offline Lavcat  United States
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Originally Posted by bigfishe View Post
My SL-10 is battery powered.I talked to MrPass about it and he said it's as good as it gets.Think about it. Zero noise and all the current you need. Preamps do not need alot of battery and mine last a month before needing a charge.
Any more details on how you are doing this?
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Old 4th October 2011, 01:34 AM   #27
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Take four 12 volt battery's .Run two pair in series.
Take the 24 volt positive and the 24 volt neg and find a xlr plug
And some good 16 agw wire and your set
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Old 4th October 2011, 01:40 AM   #28
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Oh run ground from wall.
Hey come to think of it this is a duel
mono power supply
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Old 4th October 2011, 01:57 AM   #29
Lavcat is offline Lavcat  United States
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Quote:
Originally Posted by bigfishe View Post
Take four 12 volt battery's .Run two pair in series.
Take the 24 volt positive and the 24 volt neg and find a xlr plug
And some good 16 agw wire and your set
Could you say which batteries you are using?
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Old 4th October 2011, 03:26 PM   #30
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Small rectangle 3 amp hour 12 volts
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