The transformer it's done and working great! Part 3
Here you can purchase the kit
https://www.aliexpress.com/item/33028230465.html?spm=a2g0o.productlist.main.1.1b7a7a5f3uF89k&algo_pvid=cd5cc4e7-01fd-430c-af5c-ba4c88421ab7&algo_exp_id=cd5cc4e7-01fd-430c-af5c-ba4c88421ab7-0&pdp_ext_f=%7B%22sku_id%22%3A%2267205747500%22%7D&pdp_npi=3%40dis%21EUR%212.51%212.51%21%21%21%21%21%40211bd7d616802737387703019d0718%2167205747500%21sea%21RO%211675461357&curPageLogUid=2Hx1ZUC9dk06
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https://www.youtube.com/watch?v=V5dFgEW1jqQ
Last day of a week of testing a cheap SPF5198Z amplifier between a RAK 8dB and Heltec miner..interesting results.So far I can say that is working like 30% from the beacons..not clear if is right or wrong, the Network is very temperamental..ups and downs even in the same hour..probably after next week of testing bare antenna to the miner we can have a clear compare.So, stay tuned for more...
BTW, if you are in a need of a very useful Smart multimeter check here..nice discounts! https://kaiweets.com?sca_ref=1585756.RPFARYWfnv
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https://www.youtube.com/watch?v=F0W32a3D0Nw
Let's test a NE5532 tone control
00:01 Intro
00:58 How to check for linear potentiometers
01:44 How to check NE5532 for fakes
02:54 Check for transformer AC voltages..not enough..
04:00 I have to use lab power supply instead
04:50 Let's do the connections
05:11 Funny ...potetiometers metal case it's not grounded! HUMmmmm
07:56 It's alive !!!
08:23 Sound check
14:16 Outro and don't forget like and subscribe
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https://www.youtube.com/watch?v=gSVZTJ32Pas
How to use Vegas Pro 18 tutorial about doing your own videos, how to edit video and audio dubbing, easy and fast.
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https://www.youtube.com/watch?v=Lq098zny0zs
Part 2 about a simple MOD transform an active crossover like Super X-over Beringher in a 3 band tone control EQ. It will change dramatically single amplifier driving a subwoofer and full range cabinets. It connects between a mixer and power amplifier lets you change overall audio spectrum into a new dimension.
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https://www.youtube.com/watch?v=KGgVxlOww1k
A simple MOD to internal power supply modification in order to obtain low noise. Internal DC to DC convertor is prone to RF interference.
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https://www.youtube.com/watch?v=9uV6Bx0o8aA
Part 3. Fixing the hammers for molding with silicon rubber.
Thomann SP5500 with broken keyboard attempt to fix. Beautiful mechanism fully weight piano keys. This model's keys are similar Medeli: DP-680, Clifton SP-5500, Thomann DP-85, SP-5500, Kurzweil KA110
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https://www.youtube.com/watch?v=p88eOMqYaZM