can i use BU407 instead of MJE340
For VAS use 2SB649/2SD669 instead MJE340/MJE350 or
2N3440/2N5415, MPSU10/MPSU60 (not same pin out as MJE or 2SA/2SC)
For drivers you can use 2SA968/2SC2238 instead MJE15031/MJE15030
Your amplifier is getting more distortion.
i have used BF871/2 instead of MJE340/350 and for drivers BD243C/BD244C
i have used only one pair of 2N3773
sound quality is too poor that we could not hear for long time as we get irritated to it.
why its happening like this?????
I am waiting for your suggestions
i have used BF871/2 instead of MJE340/350 and for drivers BD243C/BD244C
i have used only one pair of 2N3773
sound quality is too poor that we could not hear for long time as we get irritated to it.
why its happening like this?????
I am waiting for your suggestions
Your amplifier is getting more distortion.
i have used BF871/2 instead of MJE340/350 and for drivers BD243C/BD244C
i have used only one pair of 2N3773
sound quality is too poor that we could not hear for long time as we get irritated to it.
why its happening like this?????
I am waiting for your suggestions
What is kind of distortion, can you describe? Do you measurment DC offset? For start you must have 0,6V on resistors 270R and 56R in CCS.
Can you post some photos?
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Your amplifier is getting more distortion.
i have used BF871/2 instead of MJE340/350 and for drivers BD243C/BD244C
i have used only one pair of 2N3773
sound quality is too poor that we could not hear for long time as we get irritated to it.
why its happening like this?????
I am waiting for your suggestions
http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-begginers-14.html#post2272562
Wahab, go to post #129
http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-begginers-13.html
Regards
http://www.diyaudio.com/forums/solid-state/167394-quasi-amplifier-begginers-13.html
Regards
prefer the cooked fish
I prefer the cooked one in the restaurant, much more easier!🙂
Best regard
Albert
Fisherman told me fishing isn't cost effective hoby, better buy fish 🙂
I prefer the cooked one in the restaurant, much more easier!🙂
Best regard
Albert
I prefer the cooked one in the restaurant, much more easier!🙂
Best regard
Albert
Me too, but some people just love to fishing and evan don't like eat the fish 🙂
Please do help kind Sir
Do you have schematic for that? I can't figure out the diodes and some of the transistors! Please do help kind Sir!
Best regard
Albert B.
I find paper with circuit of this amplifier with single pair 2N3773 and added VI limiter.
Do you have schematic for that? I can't figure out the diodes and some of the transistors! Please do help kind Sir!
Best regard
Albert B.
Hello sir
can i use this amplifier for keyboard and guitar (100watt 8ohms load)
does it work for continues program with two 2n3773
i have 35-0-35 transformer can i use for this amplifier
i found a circuit in the web but it did not worked to me output transistors are getting very hot even at medium sound (see attachment) hope yours will run cool
please attach a fresh schematic with bias adjusting with modifications as per my requirement
sorry for my bad English
Dis you mean that this amp doesn't work at all? I almost gathered all the parts needed for this amp untill I read your post!
Best regard
Albert B.
Malaysia
P.S Happy Aidilfitri
Do you have schematic for that? I can't figure out the diodes and some of the transistors! Please do help kind Sir!
Best regard
Albert B.
No, I lost schematic for BOS100, but you can use pcb design as start point for simillar amps.
Amplifier from post #1 is fully worked design.
Regards
a bit skeptical about the schematics
I am a bit skeptical about the schematics that you had pointed to me (post #1), because the schematic itself doesn’t coexisted with the PCB design that you had posted. Components are different and events the circuit board design are mismatched. Please help kind Sir! If you happened to have power amp with 2N3055/2N2955 please send over.
Thanks
Best regard
Albert
No, I lost schematic for BOS100, but you can use pcb design as start point for simillar amps.
Amplifier from post #1 is fully worked design.
Regards
I am a bit skeptical about the schematics that you had pointed to me (post #1), because the schematic itself doesn’t coexisted with the PCB design that you had posted. Components are different and events the circuit board design are mismatched. Please help kind Sir! If you happened to have power amp with 2N3055/2N2955 please send over.
Thanks
Best regard
Albert
I am a bit skeptical about the schematics that you had pointed to me (post #1), because the schematic itself doesn’t coexisted with the PCB design that you had posted. Components are different and events the circuit board design are mismatched. Please help kind Sir! If you happened to have power amp with 2N3055/2N2955 please send over.
Thanks
Best regard
Albert
Circuit is simple as possible, but if you still confused, you can go to 100W Ultimate Fidelity Amp and use 2N3055/2N2955 with +/-30V DC rail voltage. I can explane to you anything about QUASI amp. This amp can be used for many powers and many diff part can be use for this amp, and it's for beginers to get expirience in buiding and have funtional amp at the end. Any sound from this amp will be better than no sound from not funktional amp.
Regards
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Hello Apex, can u suggest me a PSU as I wanna build it using two 2N3055 on +/-30V DC ? Would I hv to use 30V 10A transformer?
Thanks.
Thanks.
Hello Apex, can u suggest me a PSU as I wanna build it using two 2N3055 on +/-30V DC ? Would I hv to use 30V 10A transformer?
Thanks.
Transformer must have 2x22v AC max 5A for stereo if you wanna use 2N3055 (60V CE).
Regards
I'll use it Mono as my bass guitar amp. Please give me a PSU schematic if u have. I am a beginner in DIY.
Thanks.
Thanks.
I'll use it Mono as my bass guitar amp. Please give me a PSU schematic if u have. I am a beginner in DIY.
Thanks.
For mono use 100VA transformer 2x22vac, 2,5A. PSU is bridge rectifier 8A and two caps 4700uF/35V see post #1.
Regards
Simple limiter if you use amp for PA or as powered subwoower amp.
apex sir,
how does this limiter works???...how do i know that the limiter limiting????...how do i modify the circuit if use to another amp???...
tnx...
ees...
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