One passing remark I wondered about while reading this essay is whether it
was feasible to stick with the stock 10 Henry choke, and resonate it to
120
hz with a suitable oil type capacitor with a value somewhere around 0.15
uf
@ 5 KV. (10H || with 0.15 uf = ~ 130 Hz resonance). I have limited
experience with this approach, but the one time I tried it, it seemed that
the critical inductance need dropped leaving everything else constant, and
the AC ripple coming out of the filter was far less than a normal choke
input filter. I did not do dynamic load variation tests however, so who
knows..
The main problem with the resonant choke is getting a suitable resonating
capacitor. It has to be rated at high voltage, and usually is well under 1
mfd, and the value is critical, dependent on the inductance of the choke at
full load. A resonant choke works as well as or better than a regular choke
input filter that uses a choke of optimum inductance.
Is it just me, or is the AM activity in the new voice territory
declining
already?
Mike Duke, K5XU
Kc5mip I think A.M. is well and everyone seem to be
hanging on 3880 around 7.30 a.m. in the mornings
That's exactly what I predicted the day the band opened. There would be an
initial rush to the new frequencies, but as soon as the new would wear off,
everyone would migrate back to the old frequencies and same old QRM.
I make it a point to call CQ in the new segment if I don't hear any AM
activity. Look for me around 3650, 3685, 3725, or wherever there is a
clear spot, anywhere between 3600 and 3775. Some SSB "dead air" groups are
already trying to claim certain frequencies and run anyone else off who
comes near, even if no-one in their group has transmitted within the past
half-hour.
Don k4kyv
______________________________________________________________
AMRadio mailing list
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Partner Website: http://www.amfone.net
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:[email protected]
To unsubscribe, send an email to [EMAIL PROTECTED] with
the word unsubscribe in the message body.
