@TheAnaesthetist: glad to hear you finished your amp 😎 and it's now up and running! I'm sure you'll enjoy it 😉
Hannes
Hannes
Can the LighterNote be used directly with my f5??
I'm sure this must have been discussed at some point but I am buggered if I can find the posts.....
Cheers
Dean
I'm sure this must have been discussed at some point but I am buggered if I can find the posts.....
Cheers
Dean
F5 has input impedance of 100K and should be fine with passive attenuators for the most part, IINM.
I used to use mine directly from the DAC outputs. The amp was not at all fussy or problematic when used this way.
I used to use mine directly from the DAC outputs. The amp was not at all fussy or problematic when used this way.
Hi samaloko. Yes Hifi2000 4u 300 plus pierced base. Fits perfect.
Amplimo: 2x18V 225VA ringkerntransformator - Prim. spanning : 2x 115V
The tranformers are completely silent. Bias is now set at 0,6V ~1,3A. Temp of heatsink is appr. 48 degr. C but I am not sure about the thermometer. At least I can put my hand for more than 5 sec. on the heatsink which is a reliable test according to pappa N.🙂
Thanks for that. PSU pcb's aren't available at the diyaudio store, can they be bought anywhere else?
I have a few psu pcb's left (you can order them here: cviller order site ) and I think Peter Daniel also still has some left.
Br,
Christian
Thanks Hannes,
I am enjoying it. I was intentionally worried about the combination DCB1 (no gain)-F5 and my 8 yr. old Dynaudio S25 but luckily there is a lot of emotion, subtility, nice stereoimage and enough dynamics to make me smile and enjoy the music. So I am satisfied.🙂
Joffrey
have you tried to hook F5 with pre Instead of buffer
I think that F5 having 100K Input does not need buffer
I was wondering Nelson if you had looked at this nearly comp pair from Fairchild:
FQA36P15/FQA28N15 in TO3P package and with gms of 19.5/20S, power 294/227W
Probably overkill for an F5 but I was thinking of a more powerfull design. The gm's
are significantly higher than other favorites on here.
FQA36P15/FQA28N15 in TO3P package and with gms of 19.5/20S, power 294/227W
Probably overkill for an F5 but I was thinking of a more powerfull design. The gm's
are significantly higher than other favorites on here.
> FQA36P15/FQA28N15 in TO3P package and with gms of 19.5/20S, power 294/227W
Those gm values are at 18A. I guess you are not going to bias at 18A.
So at around 2A, gm would still be like 3S or so.
Patrick
.
Those gm values are at 18A. I guess you are not going to bias at 18A.
So at around 2A, gm would still be like 3S or so.
Patrick
.
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Would anyone be able to advise the total approximate parts cost of a standard F5, using decent quality parts?
Hi Wixy,
a single channel F5 amplifier will cost ~£20 to £30.
The transformer + PSU + Heatsink + Chassis + Hardware could cost from a low of £20, if salvaged, to £1000 for new components. Using super quality parts expect >£2000 per channel.
a single channel F5 amplifier will cost ~£20 to £30.
The transformer + PSU + Heatsink + Chassis + Hardware could cost from a low of £20, if salvaged, to £1000 for new components. Using super quality parts expect >£2000 per channel.
wixy - I figure about $600-700 USD is what I have in mine. Your biggest variable is the chassis.