After building a few diy versions of the Boozhound Labs / Le Pacific JFET RIAA phono preamps, Mark decided to try the actual $79US Boozhound Laboratories (BHL) JFET RIAA phono preamplifier kit. In Mark's diy versions of the phono preamp he used polypropylene capacitors.
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| DIY JFET Phono Preamp on Stripboard |
On the other hand, the BHL phono preamp kit comes with fabulous looking vintage new old stock (NOS) Russian military paper-in-oil (PIO) capacitors. PIO capacitors made in this fashion are quite respected and sought after for their sonic qualities. The BHL phono preamp kit comes with a PCB, the circuit parts and detailed building instructions. The kit builder will need to supply a 24VDC power supply (linear, regulated or battery will work), a chassis to house the preamp and various miscellaneous hardware items like connectors and switches.
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| Finished JFET Phono Preamplifier Kit PCB with PIO Capacitors |
For his kit build, Mark used AA cell batteries for a noise free power supply and he housed the preamplifier circuit and battery power supply in the 19-inch 1U chassis shown below.
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| Inside View - JFET Phono Preamp |
Mark reports that this is his best phono preamplifier build so far. For full details about this project, see Mark's review of the Boozhound Laboratories JFET RIAA phono preamplifier kit.
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Looks like a great kit. I agree with using battery power for a phono pre. Nice and quiet. I will give this a try.
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Great blog, i certainly learnt something new
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