[corndog71]

I was looking at this...




http://www.optimabatteries.com/optima_products/yellowtop/index.php

[srb]

I was looking at this...




http://www.optimabatteries.com/optima_products/yellowtop/index.php

Yes, the Optima Yellow Top is their deep-cycle battery.  The T suffix models have 3/8" threaded stud connectors versus the SAE automotive posts (there are also models with both).  Although they are one of the more expensive AGM batteries, these are considered by many to be the state of the art with their Spiracell construction.
 
Steve

[Danny Richie]

[waltsok]

Hi Danny This is my first attempt at posting, delete if inappropriate.

             Are these the batteries you are selling, and how many would I need to achieve what Gary suggested?

[mikeeastman]

I agree, you should only use sealed batteries in a house. I have a situation were I have an outside room that is designed to house my solar equipment and my 1350 amph @ 24V battery bank that I run my house off of. So I made battery box a little bigger to house the audio batteries.

[gld]

Good morning everyone! First off let me say that I am not going to be selling a chassis or a batt kit, or power suppply for the class D stuff. I am starting work on a completely new product that will be absolutley awsome! I am not going to give any info on it or say what it is until it's finished. It may even be offered as a kit!
Now as for the power supply chioces for the classD stuff this is my opinion of course: If you expect the amp you are using to perform at it's best it must be fed a good dose of power supply! I mean that a 500 watt amp with a 300watt power supply will work but it aint gonna provide you with all it's capabilities! If you want to get the full 500 watts you must feed it MORE than 500 watts because the amps are NOT 100%+ effiecient! I have built several of these things and I have never used less than 800 va of transformer! These particular amps perform very well and will make their rated power easily.
I like the battery power supplies for the quietness and their ability to deliver plenty of current when needed. Linear power supplies can be very good if properly designed.A good example would be A friend of mine has the 254 amp with a 300 va power supply and fairly large 22KUF caps on it, no other changes. I have a 254 amp with 800 va transformer and 2 68Kuf caps and ther is NO competitionn between the 2 amps. The amp with the robust power supply easily outperforms the other amp. You would think they were 2 different amps! Even though the amps are fairly effiecient they still need to be fed a good dose of clean power to perform.
Oh yea, never never use a car battery in your home, the gasses will build up and you never know when it could go boom! Definately a do not do. Use SLA or even better AGM type batteries, those are perfectly safe in the home.

[Danny Richie]

Hi Danny This is my first attempt at posting, delete if inappropriate.

             Are these the batteries you are selling, and how many would I need to achieve what Gary suggested?

First, WELCOME!

I don't sell them. That is the battery (2 in this case) that I used with my buffer and 15 watt tube amp.

That charger is great too. You can leave it on all the time and in its first stage of charging, it is dead quiet.

[corndog71]

I'm looking at the ctek chargers and while the cheap side of me is looking at the US800 model I'm wondering if it would be adequate vs. the US3300 model.

The differences I see in the specs are:

US800
Charging current: 0.8A max
Battery capacity: 1.2–32Ah (charging) 1.2–100Ah (maintenance)

US3300
Charging Current: 0.8/3.3A max
Battery Capacity: 1.2–75Ah (charging) 1.2–120Ah (maintenance)

It's not like I listen constantly for hours on end.  At the most in a single session it's maybe an hour or two.  So I think the bigger one may be more than I need.

I'm just in the planning stages for building the buffer with the class d amp and running them both on a battery.

Any thoughts on this?

[HT cOz]

Gary thanks for that post.

It takes me forever to finish a project because I collect parts slowley over time.

I have started collecting parts for a class D amp and thankfully I started with a 1kva transformer.  Here is a link for anyone looking for a good deal.  ..www.diycable.com/main/product_info.php?products_id=597 

Cheers Robert

[HAL]

Other batteries to look at are the Interstate 100Ah AGM battery and the Optima Blue Top 75Ah AGM.  The Blue Top has wing nut terminals for connection along with the car style posts.   

[Rclark]

Can someone suggest a beefy, high quality power supply that performs as Gary suggested?

I'd like to buy the 254 kit with larger transformer,and whichever power supply you guys think has the balls needed.

I'd also like to try battery and charger, in addition to first starting with a power supply, but later, after up and running.

[wushuliu]

Can someone suggest a beefy, high quality power supply that performs as Gary suggested?

I'd like to buy the 254 kit with larger transformer,and whichever power supply you guys think has the balls needed.

I'd also like to try battery and charger, in addition to first starting with a power supply, but later, after up and running.

Some options:

http://www.antekinc.com/details.php?p=126

http://connexelectronic.com/product_info.php/products_id/89

or you can buy the basic PS board from Tom and replace the caps w/ higher values.

[wushuliu]

Good morning everyone! First off let me say that I am not going to be selling a chassis or a batt kit, or power suppply for the class D stuff. I am starting work on a completely new product that will be absolutley awsome! I am not going to give any info on it or say what it is until it's finished. It may even be offered as a kit!
Now as for the power supply chioces for the classD stuff this is my opinion of course: If you expect the amp you are using to perform at it's best it must be fed a good dose of power supply! I mean that a 500 watt amp with a 300watt power supply will work but it aint gonna provide you with all it's capabilities! If you want to get the full 500 watts you must feed it MORE than 500 watts because the amps are NOT 100%+ effiecient! I have built several of these things and I have never used less than 800 va of transformer! These particular amps perform very well and will make their rated power easily.
I like the battery power supplies for the quietness and their ability to deliver plenty of current when needed. Linear power supplies can be very good if properly designed.A good example would be A friend of mine has the 254 amp with a 300 va power supply and fairly large 22KUF caps on it, no other changes. I have a 254 amp with 800 va transformer and 2 68Kuf caps and ther is NO competitionn between the 2 amps. The amp with the robust power supply easily outperforms the other amp. You would think they were 2 different amps! Even though the amps are fairly effiecient they still need to be fed a good dose of clean power to perform.
Oh yea, never never use a car battery in your home, the gasses will build up and you never know when it could go boom! Definately a do not do. Use SLA or even better AGM type batteries, those are perfectly safe in the home.

What I want to know is if it's worth getting that beefy a supply if you're only listening at low to moderate volumes...

[ebag4]

What I want to know is if it's worth getting that beefy a supply if you're only listening at low to moderate volumes...

x2

Best,
Ed

[Rclark]

'I started building these amps for a few people a while back. I have now totally revamped the design using my own power supply.I use Jensen 4-pole capacitors ($90 each) and BYV-27s to make the rectifier. The power supply alone costs me over $1000. Pure copper binding posts, cryo-treated XLR inputs, A star grounding system using Goertz Boa wire, internal wiring is Goertz and the same wire used in Mojo Audio power cords for power signals. I also use an anti-resonant shrink fabric over all the cabling to minimize distortion caused by resonance. I then shield and damp the entire chassis. The normal class D amps are great. This "upgrade" to the kit makes the amp competitive with just about anything on the market. I recently sold this amp to a gentleman and he replaced a Gryphon dual mono amp. So there's A LOT of performance to be had out of these suckers! '

- Mintzar.

[wushuliu]

'I started building these amps for a few people a while back. I have now totally revamped the design using my own power supply.I use Jensen 4-pole capacitors ($90 each) and BYV-27s to make the rectifier. The power supply alone costs me over $1000. Pure copper binding posts, cryo-treated XLR inputs, A star grounding system using Goertz Boa wire, internal wiring is Goertz and the same wire used in Mojo Audio power cords for power signals. I also use an anti-resonant shrink fabric over all the cabling to minimize distortion caused by resonance. I then shield and damp the entire chassis. The normal class D amps are great. This "upgrade" to the kit makes the amp competitive with just about anything on the market. I recently sold this amp to a gentleman and he replaced a Gryphon dual mono amp. So there's A LOT of performance to be had out of these suckers! '

- Mintzar.

Hmm: I got the copper binding posts, so I got *that* goin' for me! 

[wushuliu]

x2

Best,
Ed

*sigh*

just when i try to get out, they pull me back in...

EDIT: So if I want to upgrade things one step at a time, I'm guessing I should start with getting an 800va transformer first, before moving on to caps, yes? (I currently have 40kuf PS).

[corndog71]

*sigh*

just when i try to get out, they pull me back in...

I've been saying that for over a decade.

[Rclark]

Hey I just discovered we've got a power supply specialist here. I can't make heads or tails of his site, but what's up with Paul Hynes? Would that be a good supply for this amp?

[HT cOz]

Hey I just discovered we've got a power supply specialist here. I can't make heads or tails of his site, but what's up with Paul Hynes? Would that be a good supply for this amp?

I've wondered the same???