100W Ultimate Fidelity Amplifier

[Rick G]

Terry,
Thanks again. are they all 1206 size?
I need to get to eye doc before i attempt this one, due to A.M.D.

 

[still4given]

I used 0805. 1/8W

 

[Rick G]

OK. Thanks again.

 

[thimios]

Prasi it is your layout ,I was changing r12 to 3k9 and trimer to 10k. The bias is now 1300 mA. and it sound very good ,strong bass and nice mids and highs.

Roly the schematic is in post# 9551, the transistors are 2N5551 and 2N5401 SMD.
Layout in pdf in attached .

Did you found the problem with flickering?

 

[roly3055]

no, I have not had time, and yours work well?

 

[thimios]

no, I have not had time, and yours work well?

My board is the original Apex version and yes works well.

 

[roly3055]

withs 4 leds, 3 signal and 1 power? my is 7 leds, 6 leds for signal an 1 power

 

[thimios]

withs 4 leds, 3 signal and 1 power? my is 7 leds, 6 leds for signal an 1 power

Yes 3 leds for signal plus one for power indication

 

[zoky2]

Thimios,yes the power led is flickering .


Regards
Zoky2

 

[Kokanee]

A2 pre amp: Thanks to Apex, Terry, and Olaf, for very simple designs.

Forgive my inexperience: are the PCB showing a complete pre-amp for stereo, or just one channel.

What PS are people using, linear, laptop bricks, can it be used with 12V or 18V supplies.

Thanks for the help,

Myles

 

[wiljj78]

Mr. Miles,
Good Day!

Just a newbie question, how many max. output pairs recommended for AX-14 as per attached schematic without changes? Thanks for the reply.

Regards,
Willy

 

[olafk]

A2 pre amp: Thanks to Apex, Terry, and Olaf, for very simple designs.

Forgive my inexperience: are the PCB showing a complete pre-amp for stereo, or just one channel.

What PS are people using, linear, laptop bricks, can it be used with 12V or 18V supplies.

Thanks for the help,

Myles

- all preamps are for stereo
- you need a power supply with positive and negative voltage from + -9V to + -15V
- linear devices are nice, do not use any switching power supplies without additional filtering

regards Olaf

 

[apexaudio]

Mr. Miles,
Good Day!

Just a newbie question, how many max. output pairs recommended for AX-14 as per attached schematic without changes? Thanks for the reply.

Regards,
Willy

Go to post #915

 

[wiljj78]

Go to post #915

Thank you..

Regards,
Willy

 

[Kokanee]

Thank you Olaf.

 

[Aatto]

interested to buy a set of FH9 boards, any available for sale ? 🙂

 

[wiljj78]

I suggest use TEF for 2 pairs or more, and bias 30-50mA per pair.

Just try only..

 

[apexaudio]

Just try only..

Nice work... I suggest AX20R or AX22...
Regards

 

[thimios]

Just try only..

Go on, this is wonderful!🙂

 

[wiljj78]

Nice work... I suggest AX20R or AX22...
Regards

Thanks.. But I think i missed those AX20R & AX22 I'll search them but if you or anyone can assist which post# would be highly appreciated.

Go on, this is wonderful!🙂

Sure.. Thanks.