Check out Dan's Small Parts RF Transistors
.
Some possibilities are:
RCA-4013 ...TO-39 METAL CAN..LONG LEADS..
NPN , RF POWER AMP/DRIVER
Po 3.5 WATTS MIN., 50 MHZ, 12 VOLT
COLLECTOR/BASE VOLTS 70
COLLECTOR/EMITTER VOLTS 70
BASE/EMITTER VOLTS 4
MAX COLLECTOR CURRENT 1.5 AMPS
MAX, DEVICE DISSIPATION 8 WATTS
FT 150 MHZ
THESE MAKE NICE QRP FINALS AND THESE WERE USED BY JOHNSON I THINK YEARS AGO IN CB'S
SPECIAL DEAL.....PRICE...$3.60 EA.
MOTOROLA MRF8004 TO-39 3.5 WATT AT 27MHZ..PRICE...
$3.75 EA.
MRF8004 DATA SHEET HERE
These make nice little QRP RF final Transistors..get some while available.
Mike N2MS
toggle quoted message
Show quoted text
On 03/30/2025 2:23 PM EDT davidgeorgerichards via groups.io <djdaverichards@...> wrote:
I notice that Kits and Parts have a good quantity of the through-hole version of the 2SC5706. I think the through-hole version of this transistor is now obsolete, which is why I'm interested. I'm attempting a scratch-build of a 2N2 for 20M, and wondering if this transistor would be a suitable replacement for the 2SC5739 final? Either way, it looks as if it could be useful for QRP PA's.
Dave
AA7EE
