DIY Dodd Buffer

TrungT · « **Reply #120 on:** 12 Apr 2010, 04:34 am »

Nicely done.
http://doddaudio.com/DIYINSTRUCTION.aspx

jkelly · « **Reply #121 on:** 12 Apr 2010, 11:48 am »

Is there a top down picture of a completed DIY unit available?

Jeff

jtwrace · « **Reply #122 on:** 12 Apr 2010, 11:57 am »

Quote from: jkelly on 12 Apr 2010, 11:48 am

Is there a top down picture of a completed DIY unit available?

Jeff

see the links that I posted on reply #58. I've taken some close ups of my buffer.

or use these
http://www.audiocircle.com/index.php?topic=75028.0
http://www.audiocircle.com/index.php?topic=74866.0

Big Red Machine · « **Reply #123 on:** 12 Apr 2010, 12:00 pm »

If using a wooden box, how many devices need some sort of grounding scheme that the metal box would provide (electrically)?

Any thermal issues needing heatsinks on any devices with a wooden box?

gld · « **Reply #124 on:** 12 Apr 2010, 02:45 pm »

Actually the way I have it built there is nothing that is in direct contact with the chassis. There is a ground buss that all the grounds connect to.
Nothing gets hot, so no heatsinking needed. Also the tube just gets warm, not hot to the touch so it's not even a problem inside a closed enclosure with little venting.
In the next couple of days I will show a pic of how it would look inside an enclosure. That way you can get an idea of the wire routing and such.

Gary

ebag4 · « **Reply #125 on:** 12 Apr 2010, 02:47 pm »

Gary,
What about the voltage regulator on your Main Wiring sheet that you note "Mount To Chassis For Heatsinking", should we come up with a heatsink if using a wooden enclosure?

Thanks,
Ed

praedet · « **Reply #126 on:** 12 Apr 2010, 02:57 pm »

Would a set-up like this from redwine.com work for power?

jtwrace · « **Reply #127 on:** 12 Apr 2010, 03:10 pm »

Quote from: praedet on 12 Apr 2010, 02:57 pm

Would a set-up like this from redwine.com work for power?

Of course but why spend that much on the power? Look at what you'll be spending on the item that actually makes the sound. I don't think the BL will make the buffer sound any better then a 12V battery hooked up to the buffer.

gld · « **Reply #128 on:** 12 Apr 2010, 04:00 pm »

Ed, Thanks DUH I forgot about the reg! Heck just a small piece of aluminum about 2" square and 1/8" thick would be plenty, or a small heatsink.

Gary

gld · « **Reply #129 on:** 12 Apr 2010, 04:04 pm »

You could use a Red Wine battery supply if you wanted to. There will be no difference sonically.

I would prefer you use a good AGM type battery and a good quality smart charger. Doing so you can connect the charger and leave it connected and plugged in all the time. Sonically you can not hear it and you never have to worry about your battery going dead.

Gary

jtwrace · « **Reply #130 on:** 12 Apr 2010, 04:10 pm »

Like what I did?

dBe · « **Reply #131 on:** 12 Apr 2010, 08:53 pm »

Quote from: gld on 12 Apr 2010, 04:04 pm

You could use a Red Wine battery supply if you wanted to. There will be no difference sonically. I would prefer you use a good AGM type battery and a good quality smart charger. Doing so you can connect the charger and leave it connected and plugged in all the time. Sonically you can not hear it and you never have to worry about your battery going dead.
Gary

I have a 100AH AGM battery and a C-TEK charger set up and it is sweet! Just sits there, making no noise, making everybody happy

Here I am, the guy with the A/C solution to noise and I'm a Dodd Battery Dood. Who knew?

High quality audio reproduction is ALL about the elimination of noise in the power supply.

Gary, you TOTALLY ROCK!!!

Dave

praedet · « **Reply #132 on:** 12 Apr 2010, 09:07 pm »

Where is everyone getting their battery from?

Robert F. · « **Reply #133 on:** 12 Apr 2010, 10:07 pm »

How do you think two 6 volt lanteren batteries would work and how long do you believe they would last?

Robert

Mariusz · « **Reply #134 on:** 12 Apr 2010, 10:19 pm »

Quote from: jtwrace on 12 Apr 2010, 04:10 pm

Like what I did?

I've ordered a similar charger. Should be here tomorrow.
Got some extra batteries - 12V 17AH and some golf cart replacements to test the kit.
But I would also like to know a reliable brand and source for batteries as well.
There seems to be a big difference in quality between brands and some sources that sells those batteries, keeps them on shelves way to long.

Mariusz

gld · « **Reply #135 on:** 12 Apr 2010, 10:23 pm »

I get all my batteries from a place called batteryplex.com. They have nearly all of the brands and their service is really good!

I have been using them for well over 2 years and have had NO bad batteries.
Gary

gld · « **Reply #136 on:** 12 Apr 2010, 11:48 pm »

Robert
2 6 volt lantern batteries in series would actually work, but depending on the tube used I don't think you should expect more than 3-4 hours on them, maybe less
Gary

HAL · « **Reply #137 on:** 12 Apr 2010, 11:49 pm »

+1 for Batteryplex. Gary told me about them when I needed new units for my Dodd battery preamp. Fast service and great prices!

Robert F. · « **Reply #138 on:** 13 Apr 2010, 09:23 am »

Quote from: gld on 12 Apr 2010, 11:48 pm

Robert
2 6 volt lantern batteries in series would actually work, but depending on the tube used I don't think you should expect more than 3-4 hours on them, maybe less
Gary

Thank you for the info. What amp hour rating would you recomend to get good battery life?

Robert

gld · « **Reply #139 on:** 13 Apr 2010, 02:25 pm »

For powering the buffer alone I recommend a 12 volt 26AH battery and a good quality smart charger like the C-Tek that is available from many sources.
gary