DIY Dodd Buffer

rtate · « **Reply #820 on:** 10 Feb 2011, 03:24 pm »

So I could assume that the $199 tube would sound better that the $79 tube??

I know what they say about when you "ass u me"

but if I thought that the more expensive tube would sound better I just might spring for it but I don't want to waste $100....
I do appreciate fine wine but within limits...

TrungT · « **Reply #821 on:** 10 Feb 2011, 03:36 pm »

^^^^^
Well ... I tried Sotek $25 tube ... then Electro-Harmonix $35 tube ... Now DR $50 tube ... sound best so far.

$100 DR tube ... have to wait

jtwrace · « **Reply #822 on:** 10 Feb 2011, 03:39 pm »

Trung

What amp and speakers do you use?

TrungT · « **Reply #823 on:** 10 Feb 2011, 04:00 pm »

^^^^^
Right now.

Class D Battery Powered
Dunlavy SCIV

Atlplasma · « **Reply #824 on:** 10 Feb 2011, 06:50 pm »

Here are three photos of my build in progress. Comments and suggestions are welcome.

TrungT · « **Reply #825 on:** 10 Feb 2011, 06:59 pm »

^^^^^
Looking good.

Atlplasma · « **Reply #826 on:** 11 Feb 2011, 03:56 pm »

Another quick update. Only a few more wires to shorten and then we should be ready for a test run.

usp1 · « **Reply #827 on:** 11 Feb 2011, 04:05 pm »

Quote from: TrungT on 10 Feb 2011, 03:36 pm

^^^^^
Well ... I tried Sotek $25 tube ... then Electro-Harmonix $35 tube ... Now DR $50 tube ... sound best so far.
$100 DR tube ... have to wait

TrungT,

I am at the $25 Sovtek tube right now. I tried the stock tube Gary send, an old RCA 12AX7 tube and the $25 6h30 tube. The 12AX7 was a clear and easy to hear improvement over the stock tube. The 6H30 was a smaller improvement. I am tempted to try a DR tube from fleabay but hesitate to buy from unknown foreign suppliers, and not sure how much of an improvement the DR tube will be. How would you describe the improvement with the DR tube? More detail? more bass control?

rtate · « **Reply #828 on:** 11 Feb 2011, 08:45 pm »

Here are some photos of my buffer...

TrungT · « **Reply #829 on:** 11 Feb 2011, 09:25 pm »

^^^^^
Looking good.

To me: DR tube improve on everything, specially at low volume.
Few people got the $50 DR tube from Russia without problem.

Atlplasma · « **Reply #830 on:** 11 Feb 2011, 09:48 pm »

Looks good, Rtate.

A general question for the group on the Neutrik plug. I'm assuming a two conductor wire is fine for this application.

TrungT · « **Reply #831 on:** 11 Feb 2011, 09:51 pm »

^^^^^
L (+)
N (-)
That's all

What's battery are you going to be use?

Atlplasma · « **Reply #832 on:** 11 Feb 2011, 10:14 pm »

I have three 7 ah batteries. If this thing actually works after everything I've done to it, I'll probably wire the batteries in parallel.

Atlplasma · « **Reply #833 on:** 11 Feb 2011, 10:51 pm »

I put the buffer into my test system and have MUSIC!

I'll have to get it into my main system ASAP!

sl_1800 · « **Reply #834 on:** 12 Feb 2011, 02:40 pm »

Atlplasma, congratulations, you will enjoy I'm sure.

Atlplasma · « **Reply #835 on:** 12 Feb 2011, 05:57 pm »

Thanks. I moved the buffer to my main system last night, and it was killer. Can't wait until the DR tube arrives.

Atlplasma · « **Reply #836 on:** 16 Feb 2011, 07:13 pm »

Just got the Parts Connexion tube (6H30-P DR 8086). It sounds really good, but I can tell that it's a real heater.

rtate · « **Reply #837 on:** 16 Feb 2011, 07:20 pm »

Atlplasma, Do you know what the date code is on your DR tube ?

TrungT · « **Reply #838 on:** 16 Feb 2011, 07:24 pm »

^^^^^

I'm going to ask the same question.

Atlplasma · « **Reply #839 on:** 16 Feb 2011, 09:44 pm »

I have a query into Parts Connexion to see if they can clarify. I can vouch for the tube's robustness. I just realized that I've been playing it for half a day at 12 volts.

That's what happens when you're too quick on the trigger.

My dyslexia is in fine form today. I rechecked the tube and the print is actually 8606 (not 8086), which I suspect means June 1986.

Ever have one of those days...