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Message |
    
Mcurrier001
New member
Username: Mcurrier001
Post Number: 6
Registered: 4-2007
| | Posted on Thursday, April 12, 2007 - 9:16 pm: | 
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i know the pills are round white and have on them say sd1446 but they also say N top left and underneath 1446 they say 519j 0332. whats all that mean? any one? next quest, whats a driver look like as for i am looking at my boomer 250 HD and just wondering if it has one. i like to take things apart to see how they tick so to speak. |
Romstar
Member
Username: Romstar
Post Number: 90
Registered: 3-2007
| | Posted on Friday, April 13, 2007 - 12:30 am: |
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Not all "pills" are round and white. The 1446s are of course, but they are just a transistor. Different case.
The average IF mixer stage produces a signal that is aproximately 0.35 watt. This generally requires a low power transistor to amplify the signal, and then feed it into another transistor. This "second to last" transistor is commonly called a driver. In low power CB radios, this stage is almost never present as most stock CB finals use that 0.35 watt at 12v to produce an output of 4-6 watts.
In linear amplifiers, the "drivers" are commonly lower power transistors that take the radio output of 4-40 watts and ramp it up to 40-120 watts so that it can drive a heavier transistor(s).
Good luck,
Romstar |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 2487
Registered: 9-2004
| | Posted on Saturday, April 14, 2007 - 11:02 pm: |
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the extra numbers are just counting and sorting numbers just like any other product.
they tell where and when it was made, etc...
really of no concern to us.
your boomer does not have a "driver" built into it.
a "driver" or "exciter" is any device that inputs a certain ammount of RF signal into another device that amplifies it.
basically, the driver is the preceding stage of the amplifier.
in your case, your radio is the driver.
if you were to look inside an amp, and see one "pill" in one area, and a pair of them together in another area, the one would be the driver for the two.
this type of amp would be referred to as a "1 driving 2".
other common examples are "2 driving 4" or "1 driving 4" (also called a 5 pill sometimes)
wanna start learning about CB's FAST?!
get a copy of lou franklins book, "the screwdriver experts guide to CB repair".
best beginners book on the subject.
you'll thank me later,
have fun, and always remember the first rule of repair: DO NO HARM! LOL
matt
anyone wanting a "clean signal", just look to the left and build one of these!!!
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Mcurrier001
New member
Username: Mcurrier001
Post Number: 8
Registered: 4-2007
| | Posted on Sunday, April 15, 2007 - 7:06 am: |
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thanks kid vicious for explaining that and clearing that up for me.
i take things apart that i own and i believe if you dont ask questions you'll never know. i like to take things apart just to see how they are made. |
Mcurrier001
New member
Username: Mcurrier001
Post Number: 9
Registered: 4-2007
| | Posted on Sunday, April 15, 2007 - 7:06 am: |
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where do i get this book? |
Tech808
Moderator
Username: Tech808
Post Number: 13497
Registered: 8-2002
| | Posted on Sunday, April 15, 2007 - 7:55 am: |
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Mcurrier001,
CLICK HERE > The Screwdriver Expert's Guide
For another GREAT book from Lou Franklin CLICK HERE > Understanding and Repairing CB Radios
Hope this help's,
Lon ~ Tech808 ~ N9CEF
CEF#808 ~ CEF HAM#33 ~ CVC#002
10-10 #61493 ~ 10-10 VP#2688
Tech808@copperelectronics.com
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