can anybody here explain the science behind transformer wraps?
what is the reason some 2879 amps using the same length transformer cores have different turns on the secondary of the output transformers, me and a friend are experimenting with these things measuring the different reactance with different wire diameter on the same core/turns and different turns but need some info, we have seen 2879 amps with 2 turns and 3 turns on the westgate large cores, and 4 turns on the 1/2" cores as in maine680's project build, now from what we have read the impedance stepup is the square of the turns so 2 turns is 4x impedance stepup 3 turns is 9x and 4 turns is 16x, what we want to know is what effect going from 2 turns to 4 turns has on the overall performance and how do you calculate the correct turns for a given core size/length,
we look at the data sheet for 2879's and see the series equivalent input/output impedance, is this the impedance we want to transform to 50ohms and if it is then how come theres big differences in the turns on different amps, does the optimal load impedance go up with supply voltage demanding less turns for an amp thats going to be used at 20v in a keydown or is there some other reason for the different turns ratio on different amps with the same cores and same number of transistors, finding info on this is proving difficult so any help would be appreciated or could anybody point us towards a source of info so we can make a calculated decision
what is the reason some 2879 amps using the same length transformer cores have different turns on the secondary of the output transformers, me and a friend are experimenting with these things measuring the different reactance with different wire diameter on the same core/turns and different turns but need some info, we have seen 2879 amps with 2 turns and 3 turns on the westgate large cores, and 4 turns on the 1/2" cores as in maine680's project build, now from what we have read the impedance stepup is the square of the turns so 2 turns is 4x impedance stepup 3 turns is 9x and 4 turns is 16x, what we want to know is what effect going from 2 turns to 4 turns has on the overall performance and how do you calculate the correct turns for a given core size/length,
we look at the data sheet for 2879's and see the series equivalent input/output impedance, is this the impedance we want to transform to 50ohms and if it is then how come theres big differences in the turns on different amps, does the optimal load impedance go up with supply voltage demanding less turns for an amp thats going to be used at 20v in a keydown or is there some other reason for the different turns ratio on different amps with the same cores and same number of transistors, finding info on this is proving difficult so any help would be appreciated or could anybody point us towards a source of info so we can make a calculated decision
