I've shorted my power supply once, complete mistake, as have a couple people
I know with the RS-35 Astron supplies and it didn't hurt them, I've heard
the RS-20 is weak though in that department, I heard they get very hot too,
or come components that don't on the 35 do so that all might be related.
----- Original Message -----
From: "Louis Kim Kline" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, January 08, 2005 3:01 PM
Subject: Re: accessible VHF equipment
> Hi.
>
> I had a situation where I hooked up a power cord backwards and the radio
> was protected by the diode, but the Astron RS20A belew the SCR, the
> voltage
> regulator and the pass transistors when presented with a shorted load. Be
> wary of this if you use Astron power supplies--I have had two of them take
> this failure mode. Their current limiting circuitry is insufficient to
> protect the supply from an accidental short circuit, and they do blow
> their
> cool very quickly. To my way of thinking, a blown power supply is only
> slightly better than a blown radio. Either way, you are off the air until
> you can either get someone to repair it or the friendly brown truck brings
> you a new one!
>
> 73, de Lou K2LKK
>
> At 08:18 AM 1/7/2005 -0500, you wrote:
>>I'd never depend on that diode to protect against hook it up backward,
>>lost
>>a radio that way that was supposedly protected and that was with sighted
>>help, kid forgot black was negative and red was positive. I don't let him
>>forget it either.
>>----- Original Message -----
>>From: "Howard Kaufman" <[log in to unmask]>
>>To: <[log in to unmask]>
>>Sent: Friday, January 07, 2005 7:29 AM
>>Subject: Re: accessible VHF equipment
>>
>>
>> > Eric, their are two wires that go from a power supply to the radio.
>> > One is positive and 1 is ground. The radio is protected by a diode to
>> > protect against reversing the wires.
>> > The way it works is the right one. The other is the wrong. On the
>> > choice
>> > of radios, how much power do you need to accomplish what you want to
>> > do? How intense is the RFI in your area?
>> > What are your antenna options? How many bands and which ones do you
>> > need
>> > in your area?
>> > What else do you want to do with the radio?
>> >
>
> Louis Kim Kline
> A.R.S. K2LKK
> Home e-mail: [log in to unmask]
> Work e-mail: [log in to unmask]
> Work Telephone: (585) 697-5753
>
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