so today what we've got is um we've got the coil on the rapide and what we're trying to do
is see how much power we can put into that coil before it heats up to unacceptable
levels i've got mike and tom operating under my instruction on my research development license
from ofcom in the office i've got the walkie-talkies here
let's see how we get on recording lovely okay uh stand by i'll just give you a uh
the coil is sitting at 33.6 degrees at the moment 33 6. right uh start transferring 400 please
just started 400 33
33.4
32.8 is
32.7
33
33 and a half
23.8
35.
36
40 at the top of the coil
34 at the bottom of the coil
46
seems to be hovering around 38 to 40.
roger we're still texting still transmit right um i'm not quite sure how that is
now reaching 69 degrees at the top of the coil
the last turn seems to be seems to be now at 78.
okay stop now please stop
very top of the coil the last turn is 103.7
after the coil is 39
roger centigrade yes
the 3m 10 flex tape seems to have held up very well
yeah that is quite hot though
i'm just gonna touch it
are you on fire not on fire no um yeah it's very hot to the touch i'll work that out afterwards
how long that was actually i could count the frames you know yeah that's easy
let's think about this if that was um ft
eight okay uh mike can you stop the camera okay good experiment i mean it must have been
a couple of minutes at 400 watts key down and yeah it just gets hotter and hotter and hotter
it seemed to settle down at about 90 degrees 100 degrees centigrade and just stop there so
if that's key down i reckon there with a coil you're good for ssb easily good for 1500 watts
you've got to remember though as soon as you start doing high power ssb other things start
going wrong like your pl259s and your coax and everything but um good for 400 watts 500 watts
ft8 for instance that would be fine i just wouldn't do any more he'd just get too hot
because he wouldn't have enough time to cool back down again but 15 seconds on 15 seconds
off at 500 watts i think you should be fine but you've seen the test make your own mind up