SECA KITS Diy

[Colin Wonfor]

Hi Clive,

Sorry mate it is a SECA a DC coupled SECA, 1 amp pcb/channel or 1 amp pcb + 1 psu pcb/channel.

Not P-P like other amps, but clive the clue is in the title.

SECA KITS Diy

The 2 power device you see are 1 FET this is the Amp and 1 Darlington this is the constant current source for the FET, not PP, it was all on Hi-fi Answer a few days ago. So you can catch up there Clive.

Is that OK?

Col

[Puffin]

Cant see the screen printing from the pic, the TIP are the output transistors?

[Clive]

Thanks Colin, even though I have Class A SE solidstate and valve amps I wasn't familiar with the term SECA.

[Colin Wonfor]

Cant see the screen printing from the pic, the TIP are the output transistors?

The TIP142 Darlington is the constant current for the FET N Channel.

[Colin Wonfor]

Is the valve OTL or transistor output?? and what valves?

Col

[Clive]

Is the valve OTL or transistor output?? and what valves?

Col

It's a 300B TX coupled.

The solidstate amp has a cap at the input so not DC coupled.

[Colin Wonfor]

It's a 300B TX coupled.

The solidstate amp has a cap at the input so not DC coupled.

Nice , the solid state output is the DC coupled ? is it a Nelson beasty? or JLH or your own? tell us more.

[Clive]

Nice , the solid state output is the DC coupled ? is it a Nelson beasty? or JLH or your own? tell us more.

Unusually for me it's not one I built. It's a Valvet E1r. Valvet is a one man-band from Germany, Knut Cornills is designer. Here's the inside, the Mcap is the input DC blocker:

[Colin Wonfor]

Unusually for me it's not one I built. It's a Valvet E1r. Valvet is a one man-band from Germany, Knut Cornills is designer. Here's the inside, the Mcap is the input DC blocker:

Has it got a op-amp class B type input, and complementary fet output?
How may Watts is it and how big is the heatsink can,t see from PIC

[Clive]

Has it got a op-amp class B type input, and complementary fet output?
How may Watts is it and how big is the heatsink can,t see from PIC

I can't comment on the opamp, I just don't know.

Size: 120 x 60 x 350 (WxHxD in mm)

10W into 8R, 18W in 4 R and 32W into 2R. 20,000uF filtering, 80VA PTX. It's a bipolar output transistor. Quiescent current is floating so it gets away with a smaller heatsink than otherwise.