Reddit:Electronics

By day I'm a micro HW/SW guy, but by night I build tube stuff such as one-tube CW transmitters. Here's one putting out about 12W from a 6DB5 audio tube and looking very October.

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https://preview.redd.it/jl360d03mnwb1.jpg?width=2747&format=pjpg&auto=webp&s=483fd4ac7b1453d02380077b548d129428cea274

I’m looking at getting some festoon lights made from a factory in China as there’s nothing on the market with what I’m looking for (and potentially sell in the future)

For context in an electrician by trade.

Basically I want to copy some of the current solar festoon lights there are on with also usb charging but a lot brighter than anything on the market.

I’m looking at 20 metres with 20 bulbs and roughly 130 lumens per bulb. A lot of the manufacturers are finding hard to produce. Is the problem the voltage or current of the battery?

Roughly what size solar panel and battery and wattage of the globes would I need to hit these specs

Any advice welcome

I saw a bulge in the case and thought it was just melted, but found this exciting scenario inside!

Hi there,

I’m working on a SMA Sunnyboy 7.7kw ( SB7.7-1SP-US-40)

I bought it knowing there was a issue, I have repaired a few of these in the past when there just basic component failure.

I’m trying to locate this blown out component but am basically unable to find ANYTHING online with these numbers to figure out the part number or even manufacturer.

I believe this is the H-Bridge of the inverter because it’s downstream of the DC-DC booster (it looks exactly the same as this one but is connected to the DC feeds from the solar panels, while the blown up one is connected to the AC side of things.

Is there anyone on her that’s familiar with this type of part or inverters in general?

Thank You in advance

I believe from the mid 1950s, still powered on!

Scored this beauty at a hamfest this weekend for $2. Was grungy a dirty. Cleaned up amazingly well.