I have always admired what Don has done with his modulation system. That
3400 hertz brick wall filter is a rarity unless one uses high technology
active circuitry such as active op-amps, switched capacitor filters, dsp,
etc. I believe Don has a passive module that does a great job. I wonder
What about bandwidth? +/- 5kc would be a 10 kc band width. I thought we
were supposed to limit our band width to 6kc. Please correct me if I am
wrong.
That is a popular urban myth. There is NOTHING in the US regulations that
specifically limits bandwidth. The regulations specify good
Hey gang,
I am looking for a Heathkit SB-220 to run about 300 watts on AM using the
Viking II to drive it. Does anyone have a decent amp that they want to sell? I
would like pics if possible.
Thanks,
Cory/AD5QP
-
Do you Yahoo!?
Thank you Don... this needs to be repeated every so often because these 'Urban
Myths' seem to never die in spite of the facts...
The way I've got it figured is the FCC doesn't want to do much of anything to
limit bandwidth... not so much for the sake of AM but to leave the doors
open for
Cory,
I have a Gonset GSB201 linear amplifier (GG 4-572B) where I use it on 75
/ 40 meters as an AM Linear. My GSB-201 only puts out about 800 - 900 watts
key down depending on drive and line voltage. I use an AM exciter that can
produce a clean 10 watt carrier, and this carrier if any
If your Viking II runs 100 watts, 400 watts will give you about 1 s-unit
gain. Not even detectable unless you look at the meter.
Could be helpful during the winter months as a supplemental room heater.
bob...w2ami
- Original Message -
From: Cory Hine [EMAIL PROTECTED]
To:
Bob,
It seems that the plate modulator type hams look down at those running AM
Linears! It would be interesting to run the numbers to look at heat radiated
into the hamshack for say a globe king 500 pumping out 350 watts carrier, and
a SB-220 putting out the same, and driven from
I've always found more RF power, at least in significant iterations of
~100watts, can make a big difference on the air in cutting thru noise
and band conditions. But what's more important is full modulation.
One potential benefit of running a -modified- Viking or Ranger, etc.
into an amp
If you can't get out consistantly with a Viking II, you need an antenna -
not an amp.
bob...w2ami
www.qrz.com/callsign/w2ami
- Original Message -
From: Gary Blau [EMAIL PROTECTED]
To: Discussion of AM Radio amradio@mailman.qth.net
Sent: Sunday, September 26, 2004 9:22 PM
Subject: Re:
No argument there.
g
RJ Mattson wrote:
If you can't get out consistantly with a Viking II, you need an antenna -
not an amp.
bob...w2ami
Hmmm, the boys on 3878 are running 1500 watts pep plus
on USB, and there is a 100 watt AM'er calling CQ on
3880. How much of an antenna would the AM'er need to
overcome the S/N ratio? I think Astabula Bill, W8VYZ
says it all:
http://www.amwindow.org/audio/mov/w8vyz.mov
Ever hear Bill
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