DIY Dodd Buffer

jtwrace · « **Reply #200 on:** 19 Apr 2010, 02:29 pm »

Quote from: mikeeastman on 19 Apr 2010, 02:26 pm

I ordered tube buffer kit and wanted know what tube others have tried and their opinions

http://www.audiocircle.com/index.php?topic=74866.0

mikeeastman · « **Reply #201 on:** 21 Apr 2010, 01:20 pm »

Thanks for link, just what I was looking for.

jtwrace · « **Reply #202 on:** 21 Apr 2010, 01:39 pm »

Quote from: mikeeastman on 21 Apr 2010, 01:20 pm

Thanks for link, just what I was looking for.

praedet · « **Reply #203 on:** 21 Apr 2010, 03:53 pm »

Did anyone download the instructions before the website went down? I can't see then currently.

TrungT · « **Reply #204 on:** 21 Apr 2010, 04:09 pm »

I do not have any problem right now.
Went through every page and everything working ok.

www.doddaudio.com

jtwrace · « **Reply #205 on:** 21 Apr 2010, 04:11 pm »

Quote from: TrungT on 21 Apr 2010, 04:09 pm

I do not have any problem right now.
Went through every page and everything working ok.

www.doddaudio.com

yep. Works fine here.

TrungT · « **Reply #206 on:** 21 Apr 2010, 08:29 pm »

Do not forget the little washer go between the RCA jack and the board

luckly me, I reallize ... but ... one RCA jack soldered on .... could be very bad

I should went to sleep then.

humm... sleep... naa... who need sleep

sl_1800 · « **Reply #207 on:** 22 Apr 2010, 01:18 am »

Hey Gary,

My Buffer Kit arrived today, thanks.

Steve

sl_1800 · « **Reply #208 on:** 22 Apr 2010, 03:13 am »

This Buffer Kit is easier to assemble than I had thought. I soldered the input board the selector switch board and the power switch board in a very short amount of time, maybe an hour and a half.

Mariusz · « **Reply #209 on:** 22 Apr 2010, 03:54 pm »

Hi Gary

quick question:

- I copied this list of tubes from Virtue ICE mono block thread. These monos use your buffer which looks very similar to this kit. If that is the case, these tubes should be comparable with your buffer kit right?

Here is the list:

12ax7
ecc83
5751
6057
6681
7025
7382
7494
cv4004
e83cc
ecc803
ecc81
12at7
6060
6201
6679
7492
7728
e81cc
ecc801
cv4003
ecc82
12au7 5814
5063
5965
6067
6189
6680
7489
7730
e82cc
ecc802
6072
12ay7
12az7

Mariusz

ebag4 · « **Reply #210 on:** 22 Apr 2010, 04:59 pm »

I was able to finish soldering all of the PC board's components including the remote transmitter and receiver in under 3 hours. Gary's instructions are excellent and easy enough even a beginner could do it. I still have to mount everything in a box and wire it together but I would say this is one of the easiest electronic components I have ever built. Two BIG THUMBS UP Gary, nice job!

Can't wait to get it running!

Best,
Ed

jtwrace · « **Reply #211 on:** 22 Apr 2010, 05:33 pm »

What about pics Ed?

Super V's and Buffer? You're a busy man...

ebag4 · « **Reply #212 on:** 22 Apr 2010, 05:49 pm »

Quote from: jtwrace on 22 Apr 2010, 05:33 pm

What about pics Ed?

Super V's and Buffer? You're a busy man...

Yes, a little too busy with my projects, I am starting to get a little grief from the boss

.

Here is a pic of what I have done on the buffer so far:

Best,
Ed

gld · « **Reply #213 on:** 22 Apr 2010, 05:52 pm »

Mariusz and everyone, all of the tubes listed will work in the buffer.

it doesn't even matter what the filament voltage is because you have the option to switch between 6 or 12 volts. In fact any tube with the same pinout as the 12AX7 tube will work in the circuit. The difference is will it work well in your system as a whole? Each tube will have a different output impedance and therefore some will not work well in your system. The first tube list provided for the buffer pretty much covers the range of output impedances. 88 ohms for a 6DJ8 and 505 ohms for a 12AX7. If you have a tube in mind and would like to know the output impedance, let me know the tube number and I'll calculate it for you. Note that in my system both the 6DJ8 and the 12AX7 work well, so the impedance difference isn't a problem.

Gary

jtwrace · « **Reply #214 on:** 22 Apr 2010, 05:53 pm »

Ed,

You're going to love the buffer. I LOVE mine!

It replaced a preamp that was 10x the cost.

ebag4 · « **Reply #215 on:** 22 Apr 2010, 05:56 pm »

Quote from: jtwrace on 22 Apr 2010, 05:53 pm

Ed,

You're going to love the buffer. I LOVE mine!

It replaced a preamp that was 10x the cost.

I believe I will. For what Gary is asking for the kit it is a bit of a no brainer, you can hardly get a volume control for the cost, as long as you are willing to roll up your sleeves!

Best,
Ed

jtwrace · « **Reply #216 on:** 22 Apr 2010, 05:59 pm »

Quote from: ebag4 on 22 Apr 2010, 05:56 pm

I believe I will. For what Gary is asking for the kit it is a bit of a no brainer, you can hardly get a volume control for the cost, as long as you are willing to roll up your sleeves!

Best,
Ed

I agree 1,000,000%!

I also see that you did the Sonic Platinum bypass upgrade. Good idea as I was shocked at the difference. I purchased mine when they first came out (assembled) and then did the bypass upgrade. I have even more

I HIGHLY recommend this to all.

dBe · « **Reply #217 on:** 22 Apr 2010, 06:49 pm »

Quote from: ebag4 on 22 Apr 2010, 05:49 pm

Yes, a little too busy with my projects, I am starting to get a little grief from the boss .

Here is a pic of what I have done on the buffer so far:

Best,
Ed

Ed,

I feel like such a slacker

I've had my Super V kits for a few months and All I have done so far is to get the main baffle construction done.

You do very nice work.

The Platinum upgrade was a good one, just like Jason said.

You go.....

Dave

Mariusz · « **Reply #218 on:** 22 Apr 2010, 06:59 pm »

Quote from: ebag4 on 22 Apr 2010, 04:59 pm

I was able to finish soldering all of the PC board's components including the remote transmitter and receiver in under 3 hours. Gary's instructions are excellent and easy enough even a beginner could do it. I still have to mount everything in a box and wire it together but I would say this is one of the easiest electronic components I have ever built. Two BIG THUMBS UP Gary, nice job!

Can't wait to get it running!

Best,
Ed

Looking good.

Wish I had a bit more extra time.

•••••••

Thanks Gary and that is pretty amazing gamma of tubes that work with
the design. Awesome.

P.S
all parts are in.
One more package to go.

•••••••

Quote

I have even more

More of what jtwrace??? mods? ideas? Secrets?

Do tell my friend

jtwrace · « **Reply #219 on:** 22 Apr 2010, 07:01 pm »

No secrets...just more drool

with the bypass caps.