Final stage resuscitation CB PRESIDENT JACKSON IRF520N FQP13N10
I was forced to do this by the price of the original transistors and the ubiquitous coloring.
So, after analyzing a multitude of diagrams, I came to the conclusion why not to use easily available and commonly used mosfets in new radios.
I went to work and it worked, so I wanted to share it with you.
I apologize in advance for the quality of the photos as I was taking a webcam.
I started with dismantling the old elements.
Next, the diagram of the new stage was created and the necessary components were assembled.
Transistors.
IRF520N better IRF510 but I didn't. The price is around PLN 2.
FQP13N10 price around PLN 5.
LEDs.
Zener 5.6V two pieces. Price 2 PLN.
Resistors.
1k-10k-100k-47k-47k0.5w. I had.
Peerki.
100k two pieces. Price: PLN 3.5.
Capacitors.
390pF two pieces. Jackson disassembly.
47pF. Jackson disassembly
150pF. I had.
1.5nF. I had.
10nF. I had.
100nF. I had.
Two ferrite beads. Jackson disassembly.
Coil twice 3.5 ZW on fi 7mm DNE 1mm. I did.
The price for the elements is negligible in my opinion.
Assembly time approx. 3 hours.
Then I started editing.
After assembly, it was the turn of the quiescent currents: driver 70mA, tip 50mA.
And now test the power AM 14W SSB 30W.
And this is a link to Transistors.
http://www.conrad.pl/Tranzystor-MOSFET-Fairch...uctor-FQP13N10.htm?websale8=conrad&pi=1264181
Maybe someone will need it. Regards Adamcall.
Adamcall wrote 156 posts with
rating 75 , helped 21 times.
Live in city Radomyśl Wielki.
Been with us since 2006 year.
Comments
Great article :) It will definitely be useful. Neighbors do not complain after the modifications? [Read more]
After testing, they perform no worse than 2SC2166 and MRF477. [Read more]
Great respect for stuffing it into the original PCB without any additional one. The very new scheme was different from the old one? Tell me, buddy, how did the work of this radio improve or worsen? the... [Read more]
buddy pawlik722, except that the power consumption jumped up slightly, the radio works one hundred percent correctly. As for the question about the difference in the schema, compare yourself with the... [Read more]
It wasn't easier to use 2SC1945 ?? https://www.youtube.com/watch?v=jJNzOv4shbk [Read more]
Maxxim. If you have access to a reliable source, post a link. With the area of Adamcall. [Read more]
Adamcall 2SC1945 You can get it from Chinese for about $ 9 ;) [Read more]
Which you can wear ... in shoes, but not in the system being repaired. Because they don't keep parameters and they burn or don't work properly. Fakes and coloring books. https://www.youtube.c... [Read more]
The original 2SC1945 was from Mitsubishi and all the others, unfortunately, are paint jobs that, even if they "work", are a different transistor. [Read more]
For 10 years I worked in the CB radio service and I will say that sometimes we dismantled the amplifiers to put the client on the MRF, and the 2SC1945 is actually a lame. It's better to use Russian... [Read more]
Hello, my colleague This is how I look and look at this colleague's diagram and I do not know too much what and how is drawn there. I draw the diagrams after making the layout and redraw them from... [Read more]
You certainly do not have 100% modulation in AM, because the modulator will not do that ... So slide down with power, because you are not domodulated on the bank. The PA current is 100mA in the original,... [Read more]
Yes, "Kwazor" at IRF 510 in PP I have about 0.5A in full HF (up to 30MHz :-) ). So probably at my friend's place there is not enough 27MHz, the higher the more :) In fact, a colleague checked the output... [Read more]
I was also wondering what their function is and I am not able to comprehend it for anything ... Was the output signal observed with an oscilloscope or (which would be great but who has one at home) with... [Read more]
The guy in the movie describes in the description how to buy transistors (he sells them himself). I always use its elements - always good quality, paired, price acceptable. When you buy crap from... [Read more]
My friend, however, the price of these transistors is knocking down. It knocks because they are used in Linkolanch and other radios and only because. The strike price is not much different than an IRF.... [Read more]
With all due respect to Cebie, but if you're talking about these transistors from the ebay photo, they're not the originals. There is no need for unnecessary comments, they stopped producing these... [Read more]
As for your correction, first see the original diagram and then incorrectly correct it. These diodes do not act as stabilizers in this system. http://www.cbtricks.com/radios/galaxy/dx98vhp/index.htm ... [Read more]
In your schematic, they don't act as stabilizers. Well, they don't work at all. However, in the original, their role is completely different and very ingenious - the polarization of the gates... [Read more]