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PostPosted: 09 May 2011, 06:59 
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Ernst wrote:
Hi Mark,
I see that you are using the Boozhoundlab phono preamp and that you are quite impressed by the preamp. I s this the unit as ordered from e-bay or did you do some modifications to the circuit. I want to add a phono stage to the ForeWatt preamplifier and the Boozhoundlab phono preamp looks as if it could the job. Regards, Ernst

This was purchased for me to assemble and write a review about. It is dead stock, straight out of the box.
It comes with the Russian military PIO) caps. I run mine on batteries and use WWW for hook-up wire and and use silver based solder that's about it. I would like to mod it though.

I was asked to review it against my other similar builds and though the gold chocolate box comes very close I do think it is the best. The BHL version runs a little dark and chocokate box brighter in the upper-mids. It gets down to taste and how it works with the rest of your system.

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PostPosted: 15 May 2011, 01:05 
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mwhouston wrote:
I run mine on batteries and use WWW for hook-up wire and and use silver based solder that's about it.

What is WWW hook-up wire?

Sorry for the noob question.

eis


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PostPosted: 20 May 2011, 17:40 
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Location: Winnipeg, CANADA
eis wrote:
What is WWW hook-up wire?

WWW = Wire Wrap Wire: http://en.wikipedia.org/wiki/Wire_wrap

Cheers

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PostPosted: 04 Jun 2011, 16:44 
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Got mine assembled but there is an oscillating noise coming from both channels. Kind of a 60hz sound maybe higher freq than that. It can't be heard while playing music through it until the quiet passages. Anyone have any ideas?


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PostPosted: 06 Jun 2011, 20:30 
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eis wrote:
Got mine assembled but there is an oscillating noise coming from both channels. Kind of a 60hz sound maybe higher freq than that. It can't be heard while playing music through it until the quiet passages. Anyone have any ideas?

Is it 60 Hz hum? That would most likely be from the power supply or poor wiring - inside or outside of the phono amp.

If it is hum, check that your RCA are not near a power cord. What are you using for a PS?

Cheers

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PostPosted: 06 Jun 2011, 21:09 
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Gio wrote:
eis wrote:
Got mine assembled but there is an oscillating noise coming from both channels. Kind of a 60hz sound maybe higher freq than that. It can't be heard while playing music through it until the quiet passages. Anyone have any ideas?

Is it 60 Hz hum? That would most likely be from the power supply or poor wiring - inside or outside of the phono amp.

If it is hum, check that your RCA are not near a power cord. What are you using for a PS?

Thank you for the response. It is actually higher pitched and warbling - the best way for me to describe it. Music plays over the top of it and can be heard between tracks and quiet passages. I'm using the 24v dc supply purchased from BHL. Jason has offered to send new jfets.


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PostPosted: 27 Jun 2011, 08:02 
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I need a little more gain out of the booxhoundlabs phono preamp. If I bypass the last FET source R with a cap will I get a little more gain? I think it should.

Cap size anyone??

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PostPosted: 10 Jul 2011, 22:34 
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Mark's review of this phono preamp kit has just been added to the project pages - Boozhound Laboratories JFET RIAA Phono Preamp Kit Review. Check it out for more info and photos of this kit.

There is also a project page for his DIY versions of the Boozhound Labs / Le Pacific JFET Phono Preamps.

Cheers

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PostPosted: 29 Jul 2011, 10:41 
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Accidently saw the diagram and rushed to have a look at "thread".
The design is extremely simpel, the component cost is low and I happen to have 10 NiMH cells left from an electric screwdriver. 8-)

Of course I have some thoughts:
As the amp is very small it could be housed in a metal subchassis even in a troublesome amp like a tube amp.
I guess I can lay my hands on a handful of caps for analogue filters from RIFA - they are extremely stable and precise.
But I am not in favour of the huge output caps so is there any way to make the amplifier bi-polar?

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PostPosted: 29 Jul 2011, 12:44 
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Soundbrigade wrote:
But I am not in favour of the huge output caps so is there any way to make the amplifier bi-polar?

Hi Magnus, The 1uF output cap does not need to be huge - you could use 50V Wima caps for the output and riaa capacitors.

Cheers

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