TSSA - The Simplest Symmetrical Amplifier

[sonnya]

They where sent from denmark yesterday, so i would expect 2 - 3 days before you have them.

 

[Edmond Stuart]

Thx Sonny.
edit: I will use the trannies for the 'SuperTIS', see my website (@ new).
Cheers,
E.

 

[sonnya]

Progress.

 

[igor0203]

Sexy

 

[sonnya]

First measurement. The 12K series resistor to the input was substituted by 18K (I did not have the 12K in stock).

The cascode BJT has a vce drop of 3.3V versus 3.15V. So the PMBFJ112 and PMBFJ175 tracks very good even they are not complementary.

I think i will just short the 2SK216 and 2SJ79 and hook them up with ALF16N16W and ALF16P16W.

 

[sonnya]

Okay.

2amp idle and stable. So 128Watt into a heatsink. Should be less than 0.4 degrees/watt.

offset can be trimmed and stable at 0mV +/- 5mV drift.

I will maybe connect to my speakers tonight.

 

[Lazy Cat]

I see four very nice PCBs, gladly it went so fast from assembly to stable conditions. Congratulations Sonny and please inform us about listening impressions. Regards, Andrej

 

[Lazy Cat]

5 minutes ago I received one looong package.

Thanks Sonny

 

[buzzforb]

Sonnya,
are you considering selling boards?

 

[Edmond Stuart]

They where sent from denmark yesterday, so i would expect 2 - 3 days before you have them.

Hi Sonny,

Today they arrived in good shape.
Manny thanks,

Cheers,
E.

 

[sonnya]

Sonnya,
are you considering selling boards?

Yes i do.

The boards are 75mu copper, and NiAu plated.

The boards without SMT Will cost 21€ each.
With SMT They Will cost 39€ each.
With All parts They Will cost 103€ each and it is without heatsink.

I Can also deliver Them assembled and testet on a heatsink.

This is for the TSSA board only.

The psu board needs to be calculated.

It May Sound expensive but there is No cheap parts in this one. Only good quality parts.

 

[igor0203]

Sorry if it was asked before...about what power are we talking here about? I mean how many watts does it put out?

 

[Joachim Gerhard]

Sonnya, that looks very good.

 

[Idefixes]

Hi sonny,

KSA/KSC package arrived today. Thanks a lot for all.

Best regards Marc

 

[brianco]

....and mine also have arrived...Many thanks,

Brian

 

[mikelm]

mine to - thx Sonny

 

[buzzforb]

Sonny. would like to order some PCB's to go with my transistors. Hae o shipped the transistors?

 

[kimon]

Hello Sonny,
how much for two PCBs assembled and tested with heatsinks?

 

[rellum]

Just found a package in my box. Thanks

Francis

 

[sonnya]

Ok. I have had the modules running for 12hours each. (please remember that this is without the renesas mosfet)

The do not drift a lot ... Delta 15mV

The idle current is stable. I am running 1.2A.

At +/-25V (18vac) the temp on a sk56 100mm from Fischer is 60 degreess

For +/-32V it is 68 degreess

For +/-36V we are hitting 72.

So the heatsink should be <0.4K/W og 2 heatsinks Per Channel.

In the first test i am a bit surprised as i was expecting tube sound, and this is true for the highs. A bit to soft or to sweet in my opinion... But it is not bad at All!!!

The bass does not suffer under the relatively High output impedance. The bottom and mids is really High class. No softie basguitar and it is easy to distinguese the instruments on Katie Melua - just like heaven.