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Discussion in 'General CB Services Discussion' started by Low_Boy, May 26, 2018.
I have a few ideas but I may be wrong. What would be a good replacement part for a 2SB824?
2SB817 is a little more robust .....
Palomar MAX MOD is even better ....... a little bigger in physical size, but is a drop in replacement. Will have to drill a new mounting hole 1/4" ~ 5/16" higher in the chassis, but is very good upgrade ......
Thanks guys. I need something in a TO220 size.
You know people are making a killing off of us...
People have known about the darlington for a while now.
2SB817 is TO3 P - flat pack package - all listed above are size equivalents.
Else 2SA1012 converts to 2SB826 PNP 12A
The TO-220 has the power wattage dissipation limitation.
BD912 than. 100V 15A, plenty of room
Thanks mike that sounds better. This is a part I never delt with before. And my choises would have been wrong. Glad I asked.
Andy the smaller replacements are a lot less robust.
I hear ya!
Was just saying the TO-220 types have only so much wattage they can dissipate - the TO-3P and the 247 styles have the bigger die surface area to drain off the heat.
The problem is with the radio - not the part = the size needed to upgrade versus the amount of room the radio actually has for that.
A TO3-P Flat pack is a big transistor - can't squeeze them in too well on a PC-122. At least not without several extensions ...
Hey, as long as you got room!
:+> Andy <+:
Yes Andy this is a Realistic TRC-485 almost the same as a PC-122
TRC-485 - you sly devil you...
I hope you can get it to fit...
(Why not run the RWOB)
:+> Andy <+:
Hopefully you can make it fit without drilling an additional mounting hole. I hate the process of cleaning up all the metal debris scattered about the radio. If it’s steel, try placing a powerful magnet close to the drill bit. My favorite magnet for that purpose can be found inside a bad hard drive. Those extremely powerful flat magnets are also great for finding embedded stud screws in your drywall.
We use type TIP42C. The suffix letter "C" only indicates the circuit voltage it will handle. Any version from "TIP42" without a suffix letter, the "A" and "B" versions should perform the same in a 12-Volt radio.
Sunbulls... A saw a video today how a guy used the same magnet under a roof panel to mount a magnetic antenna on a ford aluminum cab pick up.
I use a whitney punch. but am putting in a BD912 in this.
Nomad I knew there was a TIP number that would fit. I used one once before and was sure I had notes on it in my Realistic file but somehow could not find the notes. Thank You.