Re: [IRCA] DC Power for DX rigs

[Charles A & Leonor L Taylor <calltaylor@xxxxxxx>]

Patrick,

My SPR-4 loses a lot of gain at 13.8 V (nominal full charge voltage of car 
batteries). So when I used it with power from the car,
it needed the gain of the (internally amplified) Space Magnet II.

To try to use the SPR-4 with an unamplified loop would have made it near 
worthless. Sad but true.

My SPR-4's power supply ran closer to 16 volts, regulated.

Since I had an SM-2, I was OK. But later, I built an inverter to convert 12 
V to 120V and then powered the set off the 120 V from the inverter.

An inverter can make a lot of RFI, but I filtered mine for RF and ran an 
extensin cord from the inverter to the SPR-4. Left the RFI behind in the car.

By the way, I'd set up DX shop in the little road-side parks around 
Indiana. They had a picnic table. Set up the SPR-4, the SM-2 and a cassette 
recorder and let 'er rip. Simple and fun.

Bring along some Lysol wipes to clean off the picnic table if some of you 
readers do that. Some of the picnic tables had all sort of gunk on them. Or 
towels to cover the wood surface.

73 de Charlie

At 01:01 AM 1/26/2006, you wrote:

>Tom,
>
>Wow! At 11v the R8 starts to go. That does make it difficult to use a
>storage battery very long. The battery is at 12v when charged, so at
>losing a volt, it gets in trouble. That is too bad. I have an SPR4. I
>wonder if it would react the same way?
>
>73,
>
>Patrick
>
>Patrick Martin
>
>Come to Seaside Oregon for the 2006 IRCA Convention! It will be held at
>the Comfort Inn on September 22-24,2006.
>
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