mje15030/15031
MJE340/350 in VAS, MJE15030/31 as drivers.
I love this project , it is like a old school but very high quality of basical Yamaha AX series HiEnd amplifiers , this is very good sound , precision & natural 100%
Congratulations for true power !
In post #1 I say this amp was made for testing speakers, sound is good, precision and natural, but there is another adventage sound not change much with all kind of speakers wires, x-overs, and box topology (bass reflex, TL...)
apex,MJE340/350 in VAS, MJE15030/31 as drivers.
i have an old amp with 2n3055 and its matched pair 2pcs. each
i want to modify it to ultimate fidelity
how much power can this go using ultimate fidelity board
what ideal voltage and how much kva(trafo)
thanks
apex,
i have an old amp with 2n3055 and its matched pair 2pcs. each
i want to modify it to ultimate fidelity
how much power can this go using ultimate fidelity board
what ideal voltage and how much kva(trafo)
thanks
Do you have BDX18 as matched pair with 2N3055, or you want use another 2N3055 in quasi output? Modify NX14 useing this schematic (not tested).
Rail voltage +/-30V is maximum, power 60W/4R with 100VA transformer (200VA for stereo)
Regards
Attachments
Last edited:
Do you have BDX18 as matched pair with 2N3055, or you want use another 2N3055 in quasi output? Modify NX14 useing this schematic (not tested).
Rail voltage +/-30V is maximum, power 60W/4R with 100VA transformer (200VA for stereo)
Regards
mj2955
mj2955
OK, for 2N3055/MJ2955 outputs use AX14 pcb with +/-30V rail voltage.
Regards
and this is for nx14 a bunch of irf,& 2skDo you have BDX18 as matched pair with 2N3055, or you want use another 2N3055 in quasi output? Modify NX14 useing this schematic (not tested).
Rail voltage +/-30V is maximum, power 60W/4R with 100VA transformer (200VA for stereo)
Regards
Attachments
and this is for nx14 a bunch of irf,& 2sk
Some 2SK mosfets can't be use for NX14 (2SK1058, 2SK135...)
apex,Speaker Termial with Zobel Network and DC Protect with Triac.
choke coil wire size & turns
does the +&- going to speaker?
apex,
choke coil wire size & turns
does the +&- going to speaker?
16 turns 1,5mm wire on 15mm coil.
+ & - going to speaker, out & gnd going to amp.
Last edited:
apex,
what is db3?
and triac replacement Amp?volt? equivalent
thanks
DB3 is DIAC, any TRIAC over 400V, 8A can be use,
Regards
Speaker Termial with Zobel Network and DC Protect with Triac.
Speaker Terminal can be add to any amp with rail voltage over +/-36V DC and rail fuses. I prefer this protect more than protect with relay.
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