Yes Clemens I am using m-delt4 sound card , with opera to one channel and wspr to the other , the soundcard is mixing the two data streams ...making a better job, than using the same sound card ... R
It wouild appear that if one is txing WSPR and OPERA parallel on one TX,the TX and (a possible) power amp wouild have to be linear, i.e. at least in class AB ? 73 Clemens DL4RAJ -- Original Message -
Of course you're right,Albert. I did a wrong calculation,perhaps because it was before coffee. :-) 73 Clemens DL4RAJ -- Original Message -- From: [email protected] Albert To: rsgb_lf_group@blackshee
I squared the wrong number (15+15)^2. The correct rule is: If you have a certain number of carriers you have to multiply them by the *square of their number* to calculate the necessary PEP. E.g., if
Graham, 500 , but with the 50% efficiency , for single carrier modes , >its not very cost effective ! On the other hand,if you would use one single linear amp to TX two 15W carriers (tones in USB) it
Clemens, To my knowledge the PEP of two tones (carriers) is only 6 dB higher than one tone. So a (real) linear amplifier suitable for delivering 60 - 100 watts output can deal with the two 15W carrie
Well , I call it the E-Bay special , im not sure , which is more credible , building your own equipment or keeping this old military equipment running ! The 15 watts was set to give signals just at t
Compliments on your impressive setup operated extremely conservatively for linearity reasons. I hope to get on air this weekend with about 30mW ERP in CW and WSPR. Maybe I try later OPERA as well. 73
