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Did a Google on this company and it comes up as a security company. Do you have a .com for them?

Any sources for these in the US? 73 W2LPL

I couldn't agree more. Thank you Ashhar! Allard PE1NWL

Jack Purdum via Groups.Io wrote:

*I just want to say thank you, you made a kit affordable to everyone.* *You undertook the design, giving woman work by winding toroids and other parts of the kit.* *You took your own personal time to

What about a constant current control? On several voltage regulator data sheets, I have seen many circuit recommendations including one for constant current control. Look at a data sheet for any

I juszt received my new Arduino Nano board from China and tried to upload the sketch and it worked without any problems. So it is for sure now, that the Nano on the Raduino died during the calibration

Hi Guys, I downloaded the very latest IDE and after a bit of driver uploading the Nano is now up and running on my Windows XP based Netbook ....It has to be said my programming skills are basic, But

My SMPS used to auto trip above 3 amp... Alternative, inductive circuit-breaker switch ( like those found below mixer-grinder ) can also be used in case if drain & gate gets short... 'Repair & Reuse

A fraction of an ohm resistor in the source lead would provide a negative bias with increasing device current. There will be a small drop in output power I guess. The resister can be bypassed with a

My plan is to build the circuit and plug it into the PA connector. I need to see where I can connect the bias part, so it feeds the bias regulator. Nothing fancy and nothing permanent, just in case it

Monitoring temperature in a PA (usually with a diode) works by regulating the drive voltage as temperature varies. It has little to do with SWR. It reduces the drive as the finals get hotter. Speaking

That G0KLA circuit could be quite cheap to mass produce, right in there with the cost of a fuse. Some RF amps monitor temperature at the final, though that would be even slower than a fuse. My guess

You will really need a fast blow fuse if this is to work. Semiconductor devices blow faster than fuses. Fuses work well to protect equipment from shorts that may result in fire. Raj

Thanks for the links. I will probably build it with junk box parts, all through-hole. I plan on using a larger heatsink, so I could mount the TIP transistor on there. I just need the radio to get

Here's small and cheap, appropriate for 2A and 0.7V: ??http://www.mouser.com/ProductDetail/KOA-Speer/WK73S3ATTER330F ( http://www.mouser.com/ProductDetail/KOA-Speer/WK73S3ATTER330F ) Smaller and

No insult taken. A fuse is fine. I just like the idea that I can't blow it up, no matter how much I try. I also will not have to keep spare fuses. If it truly prevents the transistor from blowing with

For BITX40

FYI .... Larger heatsink - H0669 ?$AUD3.95, fits perfectly, small nut and bolt needed - Altronics Plastic grey case with black front and rear panels - H0482 ?$AUD18.50, everything fits including

For the Bitx 40 final PA IRF510 voltage input, I would just use a 1.5A or 2A in-line fuse. Remember what KISS means?? I really don't mean to be insulting. Just pointing out the effectiveness of