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outtek 21st February 2020 12:58 PM

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

jwilhelm 21st February 2020 01:02 PM

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 21st February 2020 03:22 PM

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 21st February 2020 03:41 PM

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 21st February 2020 03:47 PM

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

jwilhelm 22nd February 2020 10:38 AM

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 22nd February 2020 11:20 AM

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 22nd February 2020 11:28 AM

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

jwilhelm 27th February 2020 12:44 AM

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 27th February 2020 01:11 AM

Great prices Jeff!


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