I'm sure this isn't what you want to hear but I'll say it anyway.
12 to 13.8V+ is a dead issue. That ship has sailed.
There is no such thing as a 2SC2879 today or even in the last 3 years. Okay there is HG...
Even if it wasn't a dead issue , the 2x8 is equally a non starter.
Even a pair of the venerable 2SC2290's or a pair of MRF455's are going to be capable of nearly 80 watts. Would you really want to drive a hypothetical (read here imaginary) 2SC2879 with 10 watts AND keep it linear for SSB use?
Now if all you wanted was a Class C maul then have at it .
Again, 12V (or wtf ever) is a dead issue, get over it .
MRF101A(B)
https://www.nxp.com/products/radio-...mrf101an-rf-essentials-kit:MRF101AN-START-KIT
MRF300A(B)
https://qrpblog.com/
or the art for my unfinished amp
MRFX1K80H
https://www.ebay.com/itm/174819992492
https://www.ebay.com/itm/313493736321
So here's the deal. Get over 12V.
Mobile
Take 4 batteries and charge in parallel , discharge in series.
This isn't optimum by any means but it's an option.
Use the China Bay boost converters. You'll need about 12 of the so called 600 watt bricks. and they make a bunch of RF noise so it's a keying sequence puzzle.
Run a secondary 50V charging system. This is probably the best alternative. just find a place to put a second alternator.
Couple of things that go largely unmentioned here.
Five times the voltage , one fifth the current.
Many radios have a keyup overshoot issue even if the output has been turned down.
The gates (input) in these devices are fragile. It's best to drive them with an input that is running flat out at it's maximum output.
Okay, the NXP data sheets are available online. You may have to register but ...
I have a few industry contacts for the active devices that won't overcharge the crap out of you so if you get serious just ask.
And last but not least the bang for the buck is
Razvan @ https://qrpblog.com/. accessories like the LPF board and others are there as well.
One last time. 12V is a dead issue.
Gee I hope I offended someone
12 to 13.8V+ is a dead issue. That ship has sailed.
There is no such thing as a 2SC2879 today or even in the last 3 years. Okay there is HG...
Even if it wasn't a dead issue , the 2x8 is equally a non starter.
Even a pair of the venerable 2SC2290's or a pair of MRF455's are going to be capable of nearly 80 watts. Would you really want to drive a hypothetical (read here imaginary) 2SC2879 with 10 watts AND keep it linear for SSB use?
Now if all you wanted was a Class C maul then have at it .
Again, 12V (or wtf ever) is a dead issue, get over it .
MRF101A(B)
https://www.nxp.com/products/radio-...mrf101an-rf-essentials-kit:MRF101AN-START-KIT
MRF300A(B)
https://qrpblog.com/
or the art for my unfinished amp
MRFX1K80H
https://www.ebay.com/itm/174819992492
https://www.ebay.com/itm/313493736321
So here's the deal. Get over 12V.
Mobile
Take 4 batteries and charge in parallel , discharge in series.
This isn't optimum by any means but it's an option.
Use the China Bay boost converters. You'll need about 12 of the so called 600 watt bricks. and they make a bunch of RF noise so it's a keying sequence puzzle.
Run a secondary 50V charging system. This is probably the best alternative. just find a place to put a second alternator.
Couple of things that go largely unmentioned here.
Five times the voltage , one fifth the current.
Many radios have a keyup overshoot issue even if the output has been turned down.
The gates (input) in these devices are fragile. It's best to drive them with an input that is running flat out at it's maximum output.
Okay, the NXP data sheets are available online. You may have to register but ...
I have a few industry contacts for the active devices that won't overcharge the crap out of you so if you get serious just ask.
And last but not least the bang for the buck is
Razvan @ https://qrpblog.com/. accessories like the LPF board and others are there as well.
One last time. 12V is a dead issue.
Gee I hope I offended someone
