Please send me the frequencies for SAMSON SR33 channel 3, 7 and 10.

PLEASE VISIT A LOCAL TELEVISION OR ELECTRONICS STORE.
THEY CAN HELP YOU DECIDE IF YOU WANT A $50 CONVERTER OR A NEW LARGE TV.
TV STATIONS CONTINUED TO SEND OUT SIGNALS ON BOTH FREQUENCIES FOR A WHILE, EVENTUALLY SWITHCHING TO LATEST FREQUENCY COMPLETELY.

It depends on what you are trying to connect. The XLR would be a professional type microphone, it does not have phantom so a condenser mic will not work. The other inputs should match your stereo equipment. The output goes to your amp.
The Samson S-Mix is a miniature, rugged 5-channel audio mixer with 4-line inputs and a single XLR microphone input. The line inputs are comprised of two 1/4" phone and stereo RCA phono connections. Each input channel has a rotary volume control and the outputs include stereo RCA phono connectors and 1/4" TRS phone headphone output. The S-Mix is powered with an 18 volt AC adapter.

Is there some reason you can't use one of you're aux sends for the compressor? You can then dial up as much compression as you want on each individual instrument. If you're determined to get the 4 mics into one compressor input.... Only thing I can think of is use TRS insert cables on the 4 mic channels - tie them all into one compressor input through a small patch bay or similar. Then bring your return from your comp to a 5th channel. Impedance matching is completely out the window so no promises on results.

The manual isn't online to my knowledge however I did find a guide on how to program it.
"Turn it on. Push the "MANUAL" button to stop it from scanning.

Push number 1, then push "MANUAL" again. This should leave you on
channel one.

Using the keypad enter the frequency you want to monitor, then push
"E." Press "REVIEW" at anytime to see what frequency is programmed
there. If the review button flashes 000.0000 on the LED readout
display, you might be entering an invalid frequency. Refer to the list
of acceptable frequencies in the Frequency Range Bands below.

Push "MANUAL" to step to channel number two. Enter the frequency. Push
"E." Push "MANUAL" to step to channel three. Repeat this process until
all the (10) channels are full, or you've run out of frequencies to
enter.

Push "SCAN" to start automatically scanning the frequencies. The
radio will stop when it hears someone talking, and resume scanning two
seconds after the conversation has stopped.

Frequency Range Bands:

20 to 29.7 MHz (10 Meter "Ham" Band)
29.7 to 50 MHz (VHF Low Band)
50 to 54 MHz (6 Meter Amateur Band)
136 to 144 MHz (Military Land Mobile)
144 to 148 MHz (2 Meter "Ham" Band)
406 to 420 MHz (Federal Government Land Mobile)
420 to 450 MHz (70cm "Ham" Band)
450 to 470 MHz (UHF Standard Band)
470 to 512 MHz (UHF "T" Band)"

http://newsgroups.derkeiler.com/Archive/Rec/rec.radio.scanner/2006-01/msg00174.html
Hope this helps.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Samson-Servo-300-Amps-manual/id/19175dj683/t/2/

Bridged Mode maybe?

It's not because of the FCC. Call Samson. They can help you troubleshoot the problem.

No, the Stage 5 series are fixed-frequency units. They come in a variety of channels (the new 200Mhz range model has 28 different ones) but they're factory-set, and not programmable, so the frequency you pick when you buy one is the frequency you're stuck with.

check see if youy have some coving the vent or the speak connect right

http://www.soundonsound.com/forum/showflat.php?Cat=&Number=403253&Main=351397