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eHam Forums / Amplifiers / RE: Ameritron AL 800HF or AL800H 3CX800A7
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on: June 01, 2012, 01:01:16 PM
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Let me ask what the difference is in him buying a tube from China and you buying an Amateur Radio that is made in Japan?
Seems to be wrong to attack him while you operate your radio that was not made in the USA.
John W3ML
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eHam Forums / Misc / RE: What is the obsession with "great audio" when transmitting?
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on: January 30, 2011, 09:55:17 AM
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The IF filter in a modern SSB transmitter will intentionally limit the audio frequency response to about 300 - 3000 Hz. The filter response however is not perfect and the edges reduce the signal level gradually.
That doesn't really apply to rigs that do all their modulation/demodulation using DSP, as many rigs do today. I can set my upper and lower TX bandwidth limits, and overall bandwidth (resulting from that), to almost anything I want them to be and when they roll off, it's like throwing a switch. I usually set "low" to 300 Hz, and "high" to 2700 Hz or 3000 Hz and have a resulting BW of 2.4 to 2.7 kHz. But if I switch to AM and we have a clear frequency, I'll set "high" to 3900 Hz and have resulting 3.6 kHz BW. It sounds way better. But if the band's all jammed up with QRM, nobody will appreciate that.  If this true with these units, then why do most guys that use one splatter up and over 5 KHZ each way? There was one on 20 meters yesterday that was over 6 Khz and God forbid someone tell him that he is over-modulating. John, W3ML |
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eHam Forums / DXing / RE: QRX for South Orkney fun
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on: January 29, 2011, 08:10:07 PM
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Not very good signals coming in to Northern Indiana. Barely could them on 40 meters tonight and have not heard them at all on any other band.
73
John, W3ML
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eHam Forums / Contesting / RE: contesting credits
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on: September 25, 2010, 08:03:41 PM
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All of your contacts will count. You have to be a member to get the certificate, just like all the other awards ARRL has to offer.
You don't need to be a member to collect the stations to qualify for the award.
73
John, W3ML
Indiana ARRL Section Manager
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eHam Forums / CW / RE: New ham enjoying CW
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on: August 10, 2010, 09:01:21 AM
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Hello Chad and welcome to Amateur Radio. Now that you are into CW maybe you would like to try one of the CW Traffic Nets. They will slow down to your speed. They meet at these times and frequencies: Net Name Frequency Local Day Year Round UTC Time Local Time when Indiana on EST EDT Indiana Section CW Net (QIN) 3.535 Daily 09:30 14:30 13:30 Indiana Section CW Net (QIN)* 3.535 Daily 00:00 19:00 20:00 You can see the entire list of nets on http://www/inarrl.orgHave fun and enjoy CW. 73 John, W3ML ARRL Indiana Section Manager |
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eHam Forums / DXing / RE: E4X Palestine May-June 2010
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on: May 30, 2010, 11:32:23 AM
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Glad I got them on 30 meters with my 40 meter dipole.
Now I can sit back and wait for a SSB contact and if I don't get it, won't worry about it..
73
John
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eHam Forums / DXing / RE: E4X
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on: May 29, 2010, 08:28:34 PM
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I was able to work them on 30 meters last night. They had a nice loud signal.
73
John, W3ML
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eHam Forums / Digital / RE: FLDigi problems
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on: April 30, 2010, 05:37:14 PM
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Mine would not decode and I found that I had to turn off the Firewall for it to work. Try that and see if it helps you.
73
John
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eHam Forums / Elmers / RE: 20 Meter Dipole Construction
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on: April 25, 2010, 07:21:52 AM
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There is nothing wrong with making it a little longer to wrap the wire. The thing to remember is you can always shorten it easily, but it is harder to add to it.
You can also go without a balun in the middle, if you want to do so.
73
John, W3ML
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eHam Forums / Station Building / RE: Battery Operation
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on: March 29, 2010, 07:48:09 PM
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Do they sell those new batteries for boats that look like tubes?
I know Advance Auto sells them.
They hold a charge really well and be can be recharged quite a lot.
John
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