I know, but it would take four 10000uF 50V caps to equal one 10000uF 100V cap. Still cheaper though.
So, in order to have 50.0000uF per channel (x2) , will need roughly 40 pieces of 10000uF 50V caps...
P. S. +2 in the output, that means 42 (!) caps.Aha, I should have known the answer 😀
So, in order to have 50.0000uF per channel (x2) , will need roughly 40 pieces of 10000uF 50V caps...
P. S. +2 in the output, that means 42 (!) caps.Aha, I should have known the answer 😀
First try with De-Lite. Not ready yet, only testing DC currents and voltages, around 1.4A through mosfet, there is MTW20N50E, dont't know how it works here. Lamp is 'original' 300W / 120V.
Hey, I have that same voltmeter still. Bought it about 50 years ago. Works perfectly on a daily basis.
I love these lightbulbs! 🙂 If you don't connect the speakers, and play loud enough, you may even hear them sing! (No kidding, I could hear my halogen sticks sing) 😉
Yes, these old HP voltmeters are very high quality, bought it 'as is' from USA and it needed only two new power supply caps. Works like new now😎
With added volume pot and output cap this amp started to work and is much better than I was thinking, thanks Nelson 🍺 now listening some local FM radio with old Sansui tuner and Mission bookshelf speaker. Only one amp.
When testing with sine generator this light bulb sings if freq is more than 3kHz, but I can't hear 20kHz, a dog is needed for this and maybe they don't like high freq sine 🤣
With added volume pot and output cap this amp started to work and is much better than I was thinking, thanks Nelson 🍺 now listening some local FM radio with old Sansui tuner and Mission bookshelf speaker. Only one amp.
When testing with sine generator this light bulb sings if freq is more than 3kHz, but I can't hear 20kHz, a dog is needed for this and maybe they don't like high freq sine 🤣
The best engineers I've worked with seem to be fairly minimalist, resourceful people with little fancy equipment and an untidy workspace. However, many technicians seem to spend thousands on the best tools and test equipment. Most of which they rarely use.Hey, I have that same voltmeter still. Bought it about 50 years ago. Works perfectly on a daily basis.
Heatsink wasn't big enough, this one is better. Mosfet's case is around 60 degrees Celsius now, much better than 90 degrees before. This amp really heats up !
Thanks, this is next step. Also to drill some holes to wooden plate and some foots underside like this one.
Wooden base starts to be better, there is now aluminium L-brackets and place for 12V computer PS fan, if needed. Power supply is also upgraded with two more caps and 5A fuse.
It's nice to see that amps like this one still light up 🙂
Yesterday, while takling to a guy working on a different sort of thing (3d printing) I looked at the part box, and I saw a SMPS which could give 72V. Immediately, something lit up
! 😀
I see no reason why DeLite amp couldn't use a 72V SMPS? Except that..high frequency noise? How objectionable would that be? Add a small filter? Also, the PSU I saw that was in smallish metalic package with a small diamater fan, which I guess would be noisy, but it could be solved by a big diameter fan running at half-speed...
Anyone tried this?
Yesterday, while takling to a guy working on a different sort of thing (3d printing) I looked at the part box, and I saw a SMPS which could give 72V. Immediately, something lit up
! 😀 I see no reason why DeLite amp couldn't use a 72V SMPS? Except that..high frequency noise? How objectionable would that be? Add a small filter? Also, the PSU I saw that was in smallish metalic package with a small diamater fan, which I guess would be noisy, but it could be solved by a big diameter fan running at half-speed...
Anyone tried this?
Amp almost ready 😎 the other box have all caps & bridge rectifier and this needs also separate boxed CE marked trafo (230VAC//48VAC - 250VA) just enough for one De-lite.
