Can you share your order at Mouser so I can compare it with my list?
Are you planning on using boutique parts in your amp?
Regards
Are you planning on using boutique parts in your amp?
Regards
That's no problem, PM me your mail-address and I'll send it to you! 🙂
I just use the parts with the best price/performance ratio, you won't find parts like Black Gates in my amp! ;-)
Received my order from Mouser today.
Things I'm still waiting for now are four resistors and the 2SC5200 / 2SA1943 combo. Except Maros and myself, apparently not to many folks are busy with the amp?
Regards
Things I'm still waiting for now are four resistors and the 2SC5200 / 2SA1943 combo. Except Maros and myself, apparently not to many folks are busy with the amp?
Regards
I am just waiting for some backordered things from Digikey. Have some transformers and heatsinks waiting.
I'm also lurking in this thread. Just finishing a P3A mod then I"m starting on this amp. Got the transistors already, buying the resistors and caps this afternoon. I'll be using the single-sided pcb posted by joel (drowranger) somewhere on the early pages of this thread.
http://www.diyaudio.com/forums/solid-state/198500-symef-amplifier-30.html#post2923013
http://www.diyaudio.com/forums/solid-state/198500-symef-amplifier-30.html#post2923013
Today I've finally got my parts from Mouser. 🙂
Now I only have to find some time to build the amp.
Now I only have to find some time to build the amp.
Still waiting... output transistors on back order still. Don't want to start till I have everything I need. Grrrrr 😡
For Bias settings check post #822. Set the bias trimmer all the way back to counter clock wise, and rotate slowly clockwise until the voltage across R14 (any of the emitter resistors of outputs) to 23mv. Increase the bias slowly in steps of 5mv at a time monitoring the temperature of the heat sinks. You would like to wait around 2min for each step this gives some time for the amp the settle down the bias currents.
If you are powering up for the first time, set the bias trimmer to Counter Clock Wise and use a series light bulb in series with mains or 10ohm 1/4W resistors in series with DC power supplies to the amp. If there are any issues this will prevent the damage of output transistors.
Hope this helps.
If you are powering up for the first time, set the bias trimmer to Counter Clock Wise and use a series light bulb in series with mains or 10ohm 1/4W resistors in series with DC power supplies to the amp. If there are any issues this will prevent the damage of output transistors.
Hope this helps.
Thanks guys for the quick reply!
Harrison, you will be happy... After almost a year, I've finally managed to finish the amp modules completely! 😀😀😀
They're both playing music right now as burn in. Will test shortly.
Ciao!
Do
Harrison, you will be happy... After almost a year, I've finally managed to finish the amp modules completely! 😀😀😀
They're both playing music right now as burn in. Will test shortly.
Ciao!
Do
I finally did most of the burn in and decided to hook it up to my DCB1, Wolfson DAC and Astasia speakers. I'm really impressed by the musicality of this amp and the overal tonal balance. Female voice are really well rendered. Lots of breathing room between instrument and the soundstage has a very good width but maybe not as deep as my ML-2 or B24.
I might just go for the new version of the amp and see if there is improvement. Anyone can comment on the newest PCB design (sound signature)?
Thanks
Do
I might just go for the new version of the amp and see if there is improvement. Anyone can comment on the newest PCB design (sound signature)?
Thanks
Do
