Simpelstark+ ODNF amplifier boards GB

[outtek]

I would be interested in 2 kits 3xcept the small signal FET's, also for the control board how much would it be?
Thanks.

 

[jwilhelm]

Our prices aren't great due to the taxes and dollar exchange we pay here in Canada but I'll see what kind of prices I can come up with. I do buy with some volume normally so I do get a bit of a break in cost.

 

[daanve]

This is what I asked in the no global feedback amplifier thread, but no reply there....:
Are the lateral mosfets replaced?
I still have a nice stash of 2sk1058/2sj162.

 

[jwilhelm]

Version 1.3 doesn't use the 2sk1058/2sj162. Earlier versions used them for drivers. I still have some boards around for version 1.2.

 

[daanve]

Thanks.
Is the circuit with the lateral fets the same (and so the BOM)?

 

[jwilhelm]

There were some changes to the circuit to run with BJTs. The V1.3 layout output stage isn't compatible with the LatFet version of the circuit.

 

[daanve]

Well I'd go with either of both output stages.
Has the switch to BJT drivers to do with the 2SK1058/2SJ162 becoming less available, or are there other benefits maybe (sound wise)?

 

[jwilhelm]

Both the LatFets and the Output BJTs have gone extinct. I still have a stash of both though.

 

[jwilhelm]

I managed to put together some prices for parts kits. For parts to assemble two Simpelstark boards less the input fets would be $175. For the complete Amp Control system (control board, two speaker relays and two temp sensor boards) $150. This is with the Tamura control transformer option, not the toroidal version.

 

[pinnocchio]

Great prices Jeff!

Do

 

[vzaichenko]

Well I'd go with either of both output stages.
Has the switch to BJT drivers to do with the 2SK1058/2SJ162 becoming less available, or are there other benefits maybe (sound wise)?

The main reason for OPS update was the 2SK1058/2SJ162 becoming less available. Soundwise, both v1.2 and v1.3 are excellent.

 

[TerraMonkey]

I managed to put together some prices for parts kits. For parts to assemble two Simpelstark boards less the input fets would be $175. For the complete Amp Control system (control board, two speaker relays and two temp sensor boards) $150. This is with the Tamura control transformer option, not the toroidal version.

Thats great Jeff, I would be interested in two complete sets of both (I bought 2x Option 3 initially, and the Jfets already)

If it's not too much trouble could you PM me the combined price and how to proceed?

cheers my friend!

 

[vasillis]

Any reliable source for input jfets?

 

[jwilhelm]

We have some jfets in stock. the

 

[jwilhelm]

Thats great Jeff, I would be interested in two complete sets of both (I bought 2x Option 3 initially, and the Jfets already)

If it's not too much trouble could you PM me the combined price and how to proceed?

cheers my friend!

Valery is going to add a buying option to our website to make things easier.

 

[vzaichenko]

OK, the part kits are arranged in the store.
Please go to "Simpelstark family" in the main menu - you will see 2 kits at the bottom.
One kit is for the amp modules (2 channels, excluding the boards and the input jFETs).
The other kit is for the Amp Control System v6.2.2 (excluding the boards).
Those are available to the GB members only.
Please let me know if some GB member has got a problem accessing those kits - I had to tag the customer records manually, so it just could happen I have missed somebody.

 

[outtek]

Hi, the control board kit has all the parts just for the actual board or does include the parts for the temp. sensor, the speaker boards? Does it has also the ribon cable and all the connectors ? Thanks again.

 

[jwilhelm]

The protection parts kit contains everything for all 5 boards plus connectors and ribbon cable.

 

[outtek]

Hi, I just placed the order for the control board set and a few other things. Can you point me to a decent programming interface for the controller? I found some but I do not want to spend the money and waiting for shipping and find out that it doesnt work properly. Thanks.

 

[vzaichenko]

Hi, I just placed the order for the control board set and a few other things. Can you point me to a decent programming interface for the controller? I found some but I do not want to spend the money and waiting for shipping and find out that it doesnt work properly. Thanks.

Hi Outtek, we use the standard Arduino IDE for writing, testing, debugging and uploading the code. You can download it here:
Arduino - Software

You just need a "programming cable" - basically a USB <-> RS232 interface converter for communicating directly with the chip on Amp Control Board.
Jeff will give you more details on the right configuration of that cable.

Cheers,
Valery