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CAP Talk  |  Operations  |  Tools of the trade  |  Topic: Radio Power Supply
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SarDragon
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Posts: 10,505
Unit: NAVAIRPAC

« Reply #20 on: January 21, 2008, 04:17:41 AM »

Link to photos and description of a Kenwood TK-730 installed in a Ford pickup.  The owner says it draws over 20 amps.
http://www.eurekaboy.com/f250/kenwood.htm

He has scanned the schematics and other documents here:
http://www.eurekaboy.com/tk730/

Also, one of us CAPTalkers (floridacyclist/Gene Floyd) owns one, according to this thread:
http://captalk.net/index.php?topic=140.msg12446

Mike


I just looked at the skizmo, and it shows a 15 A input fuse, so a 15 A PS will do fine.
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Dave Bowles
Maj, CAP
AT1, USN Retired
Mitchell Award (unnumbered)
C/WO, CAP, Ret
♠SARKID♠
Salty & Seasoned Contributor

Posts: 1,838
Unit: GLR-WI-204

Timmerman Composite Squadron - WIWG - CAP
« Reply #21 on: January 21, 2008, 04:30:01 AM »

Is amperage the only thing I need to worry about besides duty cycle?  (Components and circuitry are not my strong suit)
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           Capt. Dan Turkal
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                WI-204/CC
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SarDragon
Global Moderator

Posts: 10,505
Unit: NAVAIRPAC

« Reply #22 on: January 21, 2008, 05:12:14 AM »

Duty cycle is more of a concern for the radio than the PS. A hung key will toast the radio before it will hurt most good power supplies. As an aside, good ventilation does add to component life.
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Dave Bowles
Maj, CAP
AT1, USN Retired
Mitchell Award (unnumbered)
C/WO, CAP, Ret
♠SARKID♠
Salty & Seasoned Contributor

Posts: 1,838
Unit: GLR-WI-204

Timmerman Composite Squadron - WIWG - CAP
« Reply #23 on: January 22, 2008, 01:00:43 AM »

Okay, my commander told me which PS to get.  Its an Astron RS-35A (I'll get the 35 amp for when I eventually get into HF).  $75 to $100 so not too bad.
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           Capt. Dan Turkal
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SarDragon
Global Moderator

Posts: 10,505
Unit: NAVAIRPAC

« Reply #24 on: January 22, 2008, 03:50:17 AM »

Okay, my commander told me which PS to get.  Its an Astron RS-35A (I'll get the 35 amp for when I eventually get into HF).  $75 to $100 so not too bad.

That's apparently a price for a used unit. Most new ones run in the $150 range on the 'Net. Be careful - that's an easily and frequently abused item. I think the coin for a brand new one would be well spent.

As an aside, why do you need 25 A for HF?
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Dave Bowles
Maj, CAP
AT1, USN Retired
Mitchell Award (unnumbered)
C/WO, CAP, Ret
♠SARKID♠
Salty & Seasoned Contributor

Posts: 1,838
Unit: GLR-WI-204

Timmerman Composite Squadron - WIWG - CAP
« Reply #25 on: January 22, 2008, 04:30:19 AM »

Quote
As an aside, why do you need 25 A for HF?

Well I'd eventually like to get into some serious DXing and although the solar cycle is on the wax, it will be a few years before propagation is decently better than now.  I'd like to get a higher power radio to compensate  so for the moment, more juice is to my advantage.
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           Capt. Dan Turkal
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CAP Talk  |  Operations  |  Tools of the trade  |  Topic: Radio Power Supply
 


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