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booangler 7th August 2009 03:03 PM

Tubelab Simple P-P

Can you provide an update on the status of the Tubelab Simple P-P PCB?



SigloOne 7th August 2009 03:27 PM

The following was posted last week by George in another thread regarding the Simple P-P. He's really swamped right now testing some IC's (or something like that) at his job.


The boards are scheduled to ship in about 2 weeks. Advanced has been known to ship early. I have a skeleton of the manual written but the time frame for completion is really up in the air.

The boards should arrive at about the same time we get our next pass IC chips back at work. The last chip led to 60+ hour work weeks for almost two months. If the boards arrive one weekend before the chips it could make a months difference in the time to get everything done.

I usually want to build at least one amp, and get a beginner to build one with the instruction manual before I start selling them. It really cuts down on the questions.

I already have two Simple P-P prototype boards up and running. I have not tried my usual mono block experiments with them yet. There are usually 3 ways to make a mono block out of a stereo amp. The eaisest way is simply to leave out one channel. I have done this with the Tubelab SE and the Simple SE, and I am sure that it would work on the Simple P-P. Another option is to parallel both channels for twice the power output. Some circuit changes could be used like wiring all 4 tubes up to one OPT. Another option is to use the amp as a two channel amp for bi-amping a single speaker.

booangler 7th August 2009 03:58 PM

Thanks for the update. What is the thread name where you found that info?


SigloOne 7th August 2009 04:40 PM

Here it is:

Tubelab_com 7th August 2009 05:29 PM

Now that someone has started this thread I will post all updates here.

The chips arrived very early at work (10 days ago) which led to a panic to test all 900 of them. I have completed that. Now I am involved in the verification effort which requires a lot of time, but not like this week. If the boards showed up last Monday, they would still be unpacked.

The boards are ordered. They should be shipped next Friday (8-14) and in my hands early the next week. It is possible that they ship early.

I must then shoot all of the pictures for the manual which usually involves building two boards and one complete amp. The construction manual needs to be completed using the skeleton that I have already made from the Simple SE manual. The time for this is highly dependent on my work schedule. I then have at least one amp built by a third party "beta tester" to verify the manual. All or the parts for these three boards are on order and should be here before the boards.

Sherri has gone back up north to assist her mother, so I don't have the use of her organizational skills, but I have more free time. ;)

I am guessing that the Simple P-P goes live in about 3 or 4 weeks, but that is a guess since much of my time is beyond my control.

SigloOne 7th August 2009 06:19 PM

If you need a true novice to do a build to test the manual I would be happy to volunteer.

I am very motivated to give this a try.


Ty_Bower 7th August 2009 06:27 PM

I don't think I've seen a photo since this thread:

Has the layout changed since the prototype?

booangler 7th August 2009 06:45 PM


I'd beta test for you. I am drooling to get my hands on a board and get started. I'd be curious to know if you stuck with the LED's or not?


Tubelab_com 7th August 2009 06:59 PM


Has the layout changed since the prototype?
The general layout of all of the components is similar to that amp, but the board layout has changed. I moved several parts around to make assembly easier. I rerouted most of the traces to make the amp a little quieter.

I have a new prototype that exactly matches the board that was sent out for duplication. I will post a photo when I have some time at home. That's likely Saturday evening or Sunday morning.


If you need a true novice to do a build to test the manual I would be happy to volunteer.
I usually get Sherri to build one, but she is not here. I have already identified a local builder for Beta 1.

Tubelab_com 9th August 2009 02:22 AM

2 Attachment(s)
Picture of proto board.

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