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Re: [RFI] Report on 12V 750W server supplies

To: "rfi@contesting.com" <rfi@contesting.com>, Brian Moran <brianmo@yahoo.com>
Subject: Re: [RFI] Report on 12V 750W server supplies
From: Grant Saviers <grants2@pacbell.net>
Date: Fri, 5 Jun 2020 16:22:03 -0700
List-post: <mailto:rfi@contesting.com>
62.5a with power on/off control and 2.5a always on

One youtube states the crowbar is set at 13.8v & did not recommend setting output above 13.6 I haven't seen any advice for adjusting crowbar setpoint.

Grant KZ1W

On 6/5/2020 09:05, D C _Mac_ Macdonald wrote:
What is the output current rating?

73 de Mac, K2GKK/5
Since 30 Nov 1953
Oklahoma City, OK
USAF, Retired ('61-'81)
FAA, Retired ('94-'10)

________________________________
From: RFI <rfi-bounces+k2gkk=hotmail.com@contesting.com> on behalf of Brian Moran via 
RFI <rfi@contesting.com>
Sent: Friday, June 5, 2020 10:58
To: rfi@contesting.com <rfi@contesting.com>; Jim Brown 
<jim@audiosystemsgroup.com>
Subject: Re: [RFI] Report on 12V 750W server supplies

I recently purchased the DPS-750RB A model, which is also shown as a 
HSTNS-PD18. Using the instructions on YouTube, I easily changed the voltage to 
13.9v. I haven't had time to look for RFI using an SDR, and certainly won't 
have as extensive a test setup as Gary does.

I did not try to adjust higher than 14v, though that might be a good 
experiment. If I had any confidence I wouldn't damage something by doing so, 
I'd be willing to try higher voltages :-)

-Brian N9ADG


     On Thursday, June 4, 2020, 10:41:17 PM PDT, Jim Brown 
<jim@audiosystemsgroup.com> wrote:

  On 6/4/2020 2:49 PM, Gary Johnson wrote:
Output is fixed right at 12V but there are notes on the web about how to change 
an internal feedback resistor to tweak that up a bit.

Thanks Gary. Do you know how high V+ can be set? Some radios, notably
Elecraft rigs, have lower IMD at higher supply voltages, with 15V max.

73, Jim K9YC

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