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Author Topic: HF Radios on AM  (Read 2997 times)
W0BKR
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Posts: 1976




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« on: August 29, 2018, 04:23:00 AM »

Anyone have any first hand experience how well and how do they sound, rice boxes on AM?  I never really tried a 20 year old radio on the AM mode. I use to run an AM transmitter but got too big and heavy.  Some folks poo poo the use of the more current (last 30 or so year) solid state radios on AM.  Just curious as to some experiences.  May try mine someone on AM but haven't yet.
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SWMAN
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Posts: 1298




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« Reply #1 on: August 29, 2018, 04:47:12 AM »

 I have been told many times that my Kenwood TS 570 sounds very good on AM. I use it often on 10 meters when the band is open and it works well there. Give it a try, may be good for you also.
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SOFAR
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Posts: 1381




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« Reply #2 on: August 29, 2018, 04:47:45 AM »

From what I've read, there's specific menu settings to optimize performance.

I would look up your rig of choice, and give it a try.
http://amfone.net/Amforum/index.php
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W0BKR
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Posts: 1976




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« Reply #3 on: August 29, 2018, 07:44:07 AM »

Will try it out.  Some folks whine that the current radios don't do AM very well, but dunno about that.  I know they don't run much output as compared to the older tube AM only radios but for casual fun, would think one could get over the issue with the audio....LOL  Never heard bad audio yet, just some really widddddddddddddde stuff sometimes...
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N8YX
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Posts: 1309




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« Reply #4 on: August 29, 2018, 07:49:39 AM »

rice boxes
Dat's rayciss.

One design I would avoid like the plague - unless modified - is AME (Exalted Carrier AM). Barring high-level modulation options, look for something which employs RF pre-driver modulation. My FT-90x's, FL-101 and a couple others around the shack sound very nice when run on the mode. Setup is crucial, though.
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K4JJL
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Posts: 1094




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« Reply #5 on: August 29, 2018, 07:58:32 AM »

If I'm itching to do any AM, I just break out the old National NCX-3.  Audio always sounds better on tubes, although there's a tradeoff with drift but gets better as it warms up.
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KC8KTN
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Posts: 1852


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« Reply #6 on: August 29, 2018, 11:10:40 AM »

Be careful of using AM on 10 meters. Some out here will make a CB complaint. Some might even claim you will have a compulsion to clip a diode. Or even end up on the triple nickel.Keeping it real. Nuff said. Everyone please be safe and Enjoy the hobby. 73s or might i say it 10-4.

https://youtu.be/QFZSlm5d_FEIf
« Last Edit: August 29, 2018, 11:13:20 AM by KC8KTN » Logged
N0YXB
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Posts: 1515




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« Reply #7 on: August 29, 2018, 12:24:17 PM »

Only if they don't understand basic things like frequency allocations.
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KC8KTN
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« Reply #8 on: August 29, 2018, 04:10:38 PM »

Exactly...
Everyone be safe. Have a Joyous and Blessed day.73s
P.S. With Nuff said and Keeping it real there is not much left to say. Wow
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K5LXP
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« Reply #9 on: August 29, 2018, 04:37:48 PM »

how well and how do they sound, rice boxes on AM? 

https://www.eham.net/ehamforum/smf/index.php?topic=25586.0

Aside from the above thread I would offer there's one rig I played with that wasn't great on AM, and that was an Icom 735.  It doesn't have DSB AM with carrier, just SSB with carrier.  Basically I think they're just unbalancing the carrier balance on SSB to get SSB AM. 

Mark K5LXP
Albuquerque, NM
 
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WA2ISE
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Posts: 1254




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« Reply #10 on: August 29, 2018, 04:58:36 PM »

Be careful of using AM on 10 meters. Some out here will make a CB complaint. Some might even claim you will have a compulsion to clip a diode.

It's perfectly fine to use a modified CB set on 10 meters if you're a general, advanced or extra ham.  The AM region starts at and above 29MHz.  That modified rig can never be used on  CB again, though. 
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WZ7U
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Posts: 1073




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« Reply #11 on: August 29, 2018, 05:17:51 PM »

Exactly...
Everyone be safe. Have a Joyous and Blessed day.73s
P.S. With Nuff said and Keeping it real there is not much left to say. Wow

Then there is the waste of bandwidth issue..... ^^
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AC7CW
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Posts: 1310




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« Reply #12 on: August 29, 2018, 06:20:06 PM »

Exactly...
Everyone be safe. Have a Joyous and Blessed day.73s
P.S. With Nuff said and Keeping it real there is not much left to say. Wow

Then there is the waste of bandwidth issue..... ^^

Oh the humanity!
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Novice 1958, 20WPM Extra now... (and get off my lawn)
KM1H
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Posts: 4722




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« Reply #13 on: August 29, 2018, 07:05:10 PM »

I use a TS-940 and TS-950SD and get decent reports especially into an amp at ~1200W. Only 20-25W carrier drive is needed.

The 950SD can be modified to TX thru the LC 12 kHz filter plus audio bandwidth is selectable to at least 3 kHz as built.

FLEX rigs can sound like a BC station when set up well.

Carl
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N8YX
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Posts: 1309




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« Reply #14 on: August 30, 2018, 07:06:51 AM »

Aside from the above thread I would offer there's one rig I played with that wasn't great on AM, and that was an Icom 735.  It doesn't have DSB AM with carrier, just SSB with carrier.  Basically I think they're just unbalancing the carrier balance on SSB to get SSB AM
This is known as AME, and if the carrier level doesn't remain proportional to the sideband (audio) component it'll sound like shift. Not FM, either.
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