DIY Phono Preamp

Wayne1 · « **on:** 22 May 2003, 03:52 pm »

I had some time last night so I finished up the wiring on my "half-kit" Hagerman Bugle phono preamp and power supply.

The circuit boards for the preamp and the power supply are $25.00 each.

http://www.hagtech.com/bugle.html

They come with a very nice manual that includes all the part numbers for the parts you need to order from Digi-Key.

I decided to use Dale/Vishay 1/8 watt resistors and I upped the capacitor values for the power supply. I also used matched WIMA caps in the phono section.

The power cable is a NITRO hard wired to the PS board. I used NITRO interconnect cable for input and ouput to the phono section. I also installed a pair of Bybee purifiers on the inputs to the board

It worked just fine the first time I powered it up. I also bought Mr. Hagerman's inverse RIAA filter http://www.hagtech.com/iriaa.html and I am using that with the output from my DI/O to break the preamp in.

I took a very quick listen to it when I first powered it on through a used MMF-5 I recently picked up. It is VERY dynamic already. It does need break-in time, but I am VERY pleased with the sound for a just built piece.

Now I need to work on the MMF-5, doing the tweaks Mike Galusha has written about and I HAVE to do something about the power cable and interconnects that come with it

Brad · « **Reply #1 on:** 22 May 2003, 04:40 pm »

Wayne,

Are you going to be offering the Hagtech product as a "Bolderized" kit or complete product?
I'd be interested in it - and the MMF5 changes you make.

Wayne1 · « **Reply #2 on:** 22 May 2003, 04:43 pm »

At this point, it is a fun project for my own use.

If there is interest in it and Mr. Hagerman approves, maybe

Brad · « **Reply #3 on:** 22 May 2003, 04:48 pm »

How about making one for your old buddy Brad in Houston then?

I'm going to need to get a decent phono stage to use with the Sony Avd-C70ES.

Wayne1 · « **Reply #4 on:** 22 May 2003, 05:17 pm »

Come on Brad,

You KNOW you want some more tubes!!

The Cornet really looks like another fun project.

http://www.hagtech.com/cornet.html

I MIGHT be willing to build that one for you, for a goodly amount of cash-ola

Brad · « **Reply #5 on:** 22 May 2003, 06:28 pm »

I'm going to try to be good and live with the Sony as both HT and 2 channel for a year or two.

I would be interested in an M80 style Bugle kit to use with my MMF-5.
Looking at the hagtech page, the Cornet IS pretty interesting. $300 or less for d.i.y.

Any details on the changes Mike made to the MMF-5?

Wayne1 · « **Reply #6 on:** 22 May 2003, 07:02 pm »

Try this link for Mike's MMF Mods

http://www.audiocircle.com/index.php?topic=157

Let me add up what I spent building this wee beastie and I will get in touch with you about making another one.