Hi George, yes i had a good one. Since making the video i have upgraded the driver (2SC2166) from the original Mitsubishi to a eleflow which has more gain and now it's managing 45watts PEP! All the best , Mark.
Hi John, the IRF510 is also used as a RF device and is now being used to replace the now discontinued 2SC2078 used in many newer AM/FM CB's. The IRF510 is not a direct replacement for the 2078 and they have adapted the newer AM/FM radios to use it.
Excellent video as always mate :) Wouldn't mind replacing the 1969 in my 148 MK2 with a IRF520N. Where would you recommend I get one (plus the appropriate parts) from?
Ah ok no worries. That's strange. The final that is in my MK2 is a 1969 not a 2312. It must have been replaced at some point. The board number on mine is PB-010AA.
Tricky really, if it's just driver/finals then then the radio should still TX enough power to be heard on another radio close by which will indicate the rest is OK or should be. I change any burned parts in the PA stage as routine otherwise you can have all kinds of problems, i would also check the bias voltages on the driver/finals as if the bias diodes/resistors have gone bad then this can push up the bias voltages and destroy any new transistors you install.
Nice work Mark.. Have you ever tried different International Rectifier MOSFET's for finals? The IRF530 is similar but more powerful device. It would be interesting to see if they work as a final and if there is any improvement in power. Keep up the good work.. Best Regards John M0XFX
I have all the parts, i have converted a few Mk2's (PB-010) and normally get around 25watts PEP. The original final in the Mk2 should be a 2312. The Mk1 (PC-879) uses a 1969 from the factory but also runs at 25watts PEP with a IRF520N, likewise the STALKER 9, PRESIDENT McKINLEY (PC-893) also - i have converted all these...
Hi George, yes i had a good one.
Since making the video i have upgraded the driver (2SC2166) from the original Mitsubishi to a eleflow which has more gain and now it's managing 45watts PEP!
All the best , Mark.
Hi John, the IRF510 is also used as a RF device and is now being used to replace the now discontinued 2SC2078 used in many newer AM/FM CB's.
The IRF510 is not a direct replacement for the 2078 and they have adapted the newer AM/FM radios to use it.
Nice job Mark. Great vid as always. Hope you had a nice christmas.
George
Excellent video as always mate :)
Wouldn't mind replacing the 1969 in my 148 MK2 with a IRF520N.
Where would you recommend I get one (plus the appropriate parts) from?
Ah ok no worries. That's strange. The final that is in my MK2 is a 1969 not a 2312. It must have been replaced at some point. The board number on mine is PB-010AA.
good job mark
did you have (pb-042) President Jackson IRF520 project ?
Tricky really, if it's just driver/finals then then the radio should still TX enough power to be heard on another radio close by which will indicate the rest is OK or should be.
I change any burned parts in the PA stage as routine otherwise you can have all kinds of problems, i would also check the bias voltages on the driver/finals as if the bias diodes/resistors have gone bad then this can push up the bias voltages and destroy any new transistors you install.
Nice work Mark..
Have you ever tried different International Rectifier MOSFET's for finals?
The IRF530 is similar but more powerful device. It would be interesting to see if they work as a final and if there is any improvement in power. Keep up the good work.. Best Regards John M0XFX
Yes Mica insulators should be fine.
I have all the parts, i have converted a few Mk2's (PB-010) and normally get around 25watts PEP. The original final in the Mk2 should be a 2312.
The Mk1 (PC-879) uses a 1969 from the factory but also runs at 25watts PEP with a IRF520N, likewise the STALKER 9, PRESIDENT McKINLEY (PC-893) also - i have converted all these...