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B1 Buffer Preamp
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Old 18th June 2017, 05:24 PM   #4301
brucew268 is offline brucew268  United Kingdom
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Originally Posted by vdi_nenna View Post
At least a1 amp rating.
??
Did you read 4297 & 4298 and still say this?
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Old 18th June 2017, 06:20 PM   #4302
prasi is offline prasi  India
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B1 Buffer Preamp
20mA in ckt +some loss in PSU,... 500mA trafo are very cheap and common in India. would that be sufficient?
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Old 18th June 2017, 06:40 PM   #4303
JPS64 is offline JPS64  Germany
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Two batteries, switch and cheap Meanwell external charger?

JP
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Old 18th June 2017, 07:41 PM   #4304
vdi_nenna is offline vdi_nenna  United States
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Originally Posted by brucew268 View Post
??
Did you read 4297 & 4298 and still say this?

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Yes, because a larger VA has a natural regulation.

The other way is fine too. If you feel better using just enough that's ok.
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Old 18th June 2017, 07:46 PM   #4305
brucew268 is offline brucew268  United Kingdom
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Originally Posted by vdi_nenna View Post
Yes, because a larger VA has a natural regulation.

The other way is fine too. If you feel better using just enough that's ok.
Fair enough. Thanks for the clarification.

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Old 28th June 2017, 11:38 AM   #4306
stefan66 is offline stefan66
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I have a B1, no amp as yet, I'm considering either of these two to build, hackernap or twisted pear's sympatico, right now I'm leaning towards the sympatico, which requires a balanced input, which the B1 doesn't have.
How would the following solution work out? It'll add a little gain as far as I can tell, Assembled DRV134PA dual-channel single-ended balance board | eBay

Please advise
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Old 5th July 2017, 02:22 PM   #4307
kpsthakur is offline kpsthakur  India
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Originally Posted by JPS64 View Post
Two batteries, switch and cheap Meanwell external charger?

JP


I agree, mines work like a charm...dead quiet...


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Old 5th July 2017, 02:53 PM   #4308
Alfetta87 is offline Alfetta87  France
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Quote:
Originally Posted by stefan66 View Post
I have a B1, no amp as yet, I'm considering either of these two to build, hackernap or twisted pear's sympatico, right now I'm leaning towards the sympatico, which requires a balanced input, which the B1 doesn't have.
How would the following solution work out? It'll add a little gain as far as I can tell, Assembled DRV134PA dual-channel single-ended balance board | eBay

Please advise
This will work...
But you'll kill the advantage of the simplicity of the B1, which has only one semiconductor in the signal path (that explains the great sound).

I'm in the same situation with my B1 (using a Hypex Ncore amp), and I use a Lundahl LL1527 to symmetries the signal, works fine and sounds great.
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Old 5th July 2017, 03:02 PM   #4309
Bare is offline Bare  Canada
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Quote:
Originally Posted by stefan66 View Post
I have a B1, no amp as yet, I'm considering either of these two to build, hackernap or twisted pear's sympatico, right now I'm leaning towards the sympatico, which requires a balanced input, which the B1 doesn't have.

Please advise
You could build an F6 pass amp which has an inbuilt buffer.
Balanced is for Bragging rights Or heavy RF studio uses.
Otherwise it will give little if any in your home advantage.
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Old 5th July 2017, 06:16 PM   #4310
stefan66 is offline stefan66
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Quote:
Originally Posted by Alfetta87 View Post
This will work...
But you'll kill the advantage of the simplicity of the B1, which has only one semiconductor in the signal path (that explains the great sound).

I'm in the same situation with my B1 (using a Hypex Ncore amp), and I use a Lundahl LL1527 to symmetries the signal, works fine and sounds great.
Quote:
Originally Posted by Bare View Post
You could build an F6 pass amp which has an inbuilt buffer.
Balanced is for Bragging rights Or heavy RF studio uses.
Otherwise it will give little if any in your home advantage.
Well I have decided to go with my original plan of building the HackerNap, I should work great with the B1, though I'm also eyeing these ready made modules HYPA 17 they look pretty good, I had also considered the F5 turbo V3, though I live in the tropics and really don't need a heater.
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