Anyone one know much about these amps?
A friend of mine was given one of these.
10/15/20/40 meter switches on it.
A friend of mine was given one of these.
10/15/20/40 meter switches on it.
Thanks Robb, & Merry Christmas!Nope; it wasn't my amp anyway.
Belongs to a local op.
The mods to an amp like this goes beyond the matching coils; some caps and resistors may also need changing to make the match work
Example:
http://www.cbtricks.com/Amp/txstar/dx250_dx350/graphics/ts_dx250_dx350_sch.pdf
So to make the 2SC2879 transistors work, I shouldn't have to gut the box and copy the schematic I could just change the "matching network" (I don't know what this means) and some resistors/capacitors?The Texas Star schematic was just an example. You will notice that on it it showed boxes for certain caps that change vales because they used different finals and therefore different capacitances - is all.
Didn't mean to rebuild your amp to that schematic.
That board may have different traces/schematic than the TS.So to make the 2SC2879 transistors work, I shouldn't have to gut the box and copy the schematic I could just change the "matching network" (i.d.k.) and some resistors/capacitors?
Thanks
I am waiting this little mobile to show up in the mail, I will find out if they are stud mount. Thank You nomadradio. 73Is this a mobile amplifier?
I'm pretty sure you'll find that the transistors are the dreaded stud-mount type.
Adapting it to accept flange-mount transistors will be a mechanical PITA.
73
I am waiting this little mobile to show up in the mail, I will find out if they are stud mount. Thank You nomadradio. 73
And it's made in Florida, like me!AMCOMM
730 WEST McNAB ROAD
FORT LAUDERDALE, FLORIDA
33309
FCC Part 97.307 Emission standards
*(d)* For transmitters installed after January 1, 2003, the mean power of any
spurious emission from a station transmitter or external RF power amplifier
transmitting on a frequency below 30 MHz must be at least 43 dB below the
mean power of the fundamental emission. For transmitters installed on or
before January 1, 2003, the mean power of any spurious emission from a
station transmitter or external RF power amplifier transmitting on a
frequency below 30 MHz must not exceed 50 mW and must be at least 40 dB
below the mean power of the fundamental emission. For a transmitter of mean
power less than 5 W installed on or before January 1, 2003, the attenuation
must be at least 30 dB. A transmitter built before April 15, 1977, or first
marketed before January 1, 1978, is exempt from this requirement.
*(e)* The mean power of any spurious emission from a station transmitter or
external RF power amplifier transmitting on a frequency between 30–225 MHz
must be at least 60 dB below the mean power of the fundamental. For a
transmitter having a mean power of 25 W or less, the mean power of any
spurious emission supplied to the antenna transmission line must not exceed
25 µW and must be at least 40 dB below the mean power of the fundamental
emission, but need not be reduced below the power of 10 µW. A transmitter
built before April 15, 1977, or first marketed before January 1, 1978, is
exempt from this requirement.