-
You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
HUAGAO SEMICONDUCTOR CO., LTD.
- Thread starter unit_399
- Start date
Yeah the Bird watt meter and a floating power supply are all that's needed....Haha not!
Here's a piece of test equipment that no amplifier Builder should be without but very few even have a clue about the purpose.
https://en.m.wikipedia.org/wiki/Semiconductor_curve_tracer
https://en.m.wikipedia.org/wiki/Semiconductor_curve_tracer
It wasn't that long ago that he was a mud duck desperately trying for his first Contact on the West Coast.
That's a fact jack! I use the curve tracer to test new transistors before I install them.
The results can be pretty surprising. I have photos of some sample traces for brand new MS-1051's I received a company. Over 60% of those transistors were defective before they were ever installed. And yes, strict ESD measures were being used.
Last edited:
BLF188XR type devices might be more efficient in the long run. Hard to kill these with high SWR.
Look into some of the LDMosfet devices, like the BLF188XR, you can produce more power using less current (yes it runs @ 50 volts) I don't personally know of any candidates that would be acceptable to use at 14 V.
I just saw tallman's post.
I think the biggest barrier is going to be the power supply in mobile applications, that is going to require more work than previously. You can't just add an extra alternator and battery & get 50 Volts. Once a charging scheme and battery bank are easily thrown together, I think we will see more these devices in mobile applications. Perhaps a golf cart charger and a similar style battery bank as used in golf carts. I don't know if golf carts even run at 50 V so I need to check into that... 73
Last edited:
http://www.ebay.com/itm/DC-DC-600W-...179064?hash=item419c6bb6b8:g:A-AAAOSw4SlV8uDp
600 Watts of 50 volts from 12 volts.
600 Watts of 50 volts from 12 volts.
Just how many of these would be needed, not to nitpick or anything but many of these Chinese devices are rated at much higher values than they can actually perform safely. Nothing about this device tells me that it's rated for high current draw. I thought about a boost converter but I haven't looked into it, there might be reasons why one would want to avoid a boost converter.http://www.ebay.com/itm/DC-DC-600W-...179064?hash=item419c6bb6b8:g:A-AAAOSw4SlV8uDp
600 Watts of 50 volts from 12 volts.
Last edited:
Test
Testing in progress! I have done a preliminary test as to whether or not the ones I bought even function. Just started testing on the first one and the second is up next. Then I have to build a load bank that can handle the volts and watts.
Boost converters do generate some RFI and might need extra filtering and shielding.
Testing in progress! I have done a preliminary test as to whether or not the ones I bought even function. Just started testing on the first one and the second is up next. Then I have to build a load bank that can handle the volts and watts.
Boost converters do generate some RFI and might need extra filtering and shielding.
Please post your results, even if it isn't numbers, just what you find out would be appreciated.
Thanks!
I'm a bit leery of that until I see it proven. Looking closer at the specs:
Features:
100% Brand New & High Quality
NEW DC-DC 600W 10-60V to 12-80V Boost Converter Step-up Module Car Power Supply
Specifications:
Input voltage : 10V -60V
Input Current: Maximum input current of 15A
Output voltage : 12V -80V continuously adjustable
Output current: maximum output current of 10A ( adjustable )
Output power: the effective power P = input voltage V * 10A
Conversion efficiency: up to 95% ( input voltage, current; output voltage and current impact of conversion efficiency )
Short circuit protection : Fuse
Net Weight :272g
Size: 82*61*60mm
Color:Black& Green
Package Included:
1 x Boost Converter Step-up Module
Note the RED lines. Would this not mean a maximum power available would be 120 watts or perhaps as much as only 145 watts at 14.5 volts INPUT?
I could see 600 watts if you were driving it with 60 volts and asking it to make 70-80 volts out but not 600 watts at 12 volts INPUT.