The upper 100 ohm resistor dissipates about a watt in low-power mode.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Yep, the plot thickens. The output part was labeled K2. I had several recommendations as a cross, but the best came from here, from Jorge? He had a K2 part in an Icom, the manual listed that part as a RD01MUS1. I don't know if it is a P channel or an N channel, because google has pages showing the arrow going in both directions. Here's a spec sheet, see page 4 for a symbol of the device I am using.
On Friday, August 18, 2017 at 2:28:57 PM UTC-7, amdx wrote: ...
...
You would think they would say N or P-channel, very unclear datasheet.
I don't think I've ever seen a P-channel RF transistor. Mobility is higher in N-channel so they are usually better for a given cost.
I would think N-channel. That fits with the circuit.
kevin
So what does the direction of the arrow signify? Thanks, Mikek
After more googling, I see many more N channel Mosfes with the arrow pointing in. So I agree that I have an N channel Mosfet. I also think I have it drawn as an N channel Mosfet. So I'm not sure were P channel started.
Thanks, Mikek
Corrected updated schematic,
or,
FM
or
tnsmitter
.voltage across
Whenever I've looked at power resistor specs the stated Pdiss has been for
1,000hr life. I've even seens power Rs where the rated diss is for operatio n at -100C!!NT
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