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KPA1500 PSU fan mod - Need resistor

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Dave wo2x

KPA1500 PSU fan mod - Need resistor

Hi

I emailed support over the weekend and have not heard back. Not sure if they
received the email or are backlogged in response due to COVID-19, so posting
here.

Looking for the resistor needed for mod to lower PSU fan speed on KPA1500
s/n 423

73

Dave wo2x

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exbpi

Re: KPA1500 PSU fan mod - Need resistor

So where in the world is this modification described? Can't find anything on
the Elecraft web site.

Mike
K7PI

-----Original Message-----
From: [hidden email] <[hidden email]> On
Behalf Of [hidden email]
Sent: Thursday, May 28, 2020 06:12
To: [hidden email]
Subject: [Elecraft] KPA1500 PSU fan mod - Need resistor

Hi

I emailed support over the weekend and have not heard back. Not sure if they
received the email or are backlogged in response due to COVID-19, so posting
here.

Looking for the resistor needed for mod to lower PSU fan speed on KPA1500
s/n 423

73

Dave wo2x

______________________________________________________________
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Dave wo2x

Re: KPA1500 PSU fan mod - Need resistor

It is not on their site or I would have done it already.

From what was posted on this reflector a few days ago the resistor value was changed at some point in production.

Dave wo2x

Sent from my waxed string and tin cans.

> On May 28, 2020, at 9:57 AM, [hidden email] wrote:
>
> So where in the world is this modification described? Can't find anything on
> the Elecraft web site.
>
> Mike
> K7PI
>
> -----Original Message-----
> From: [hidden email] <[hidden email]> On
> Behalf Of [hidden email]
> Sent: Thursday, May 28, 2020 06:12
> To: [hidden email]
> Subject: [Elecraft] KPA1500 PSU fan mod - Need resistor
>
> Hi
>
>
>
> I emailed support over the weekend and have not heard back. Not sure if they
> received the email or are backlogged in response due to COVID-19, so posting
> here.
>
>
>
> Looking for the resistor needed for mod to lower PSU fan speed on KPA1500
> s/n 423
>
>
>
> 73
>
> Dave wo2x
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html Message
> delivered to [hidden email]
>

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Lou W0FK

Re: KPA1500 PSU fan mod - Need resistor

It’s E850824, KPA1500 PS Minimum Load Kit

Email Bruce, N7TY, he has an extra one and listed it on here for sale last
week

73, Lou W0FK

--
Sent from: http://elecraft.365791.n2.nabble.com/
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Dave wo2x

Re: KPA1500 PSU fan mod - Need resistor

Hi Lou

I think the PS minimum load kit is different than the resistor change to slow down the PSU fans. I have already done the minimum load resistor which helps to reduce the birdies on 80 meters.

What I am referring to is a resistor change done in production which slows down the PSU fans when the amp is idle in standby. I have not had confirmation back from support on this yet. Support is sending me something today but I believe it is the load resistor which I have already done.

Dave wo2x

Sent from my waxed string and tin cans.

> On May 28, 2020, at 1:15 PM, Lou W0FK <[hidden email]> wrote:
>
> It’s E850824, KPA1500 PS Minimum Load Kit
>
>
> Email Bruce, N7TY, he has an extra one and listed it on here for sale last
> week
>
> 73, Lou W0FK
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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Eric Norris-2

Re: KPA1500 PSU fan mod - Need resistor

I am still a bit confused by this, as I thought I was installing both--it
consisted of two parts. Please share what you hear from Support.

73 Eric WD6DBM

On Thu, May 28, 2020, 1:21 PM Dave <[hidden email]> wrote:

> Hi Lou
>
> I think the PS minimum load kit is different than the resistor change to
> slow down the PSU fans. I have already done the minimum load resistor which
> helps to reduce the birdies on 80 meters.
>
> What I am referring to is a resistor change done in production which slows
> down the PSU fans when the amp is idle in standby. I have not had
> confirmation back from support on this yet. Support is sending me something
> today but I believe it is the load resistor which I have already done.
>
> Dave wo2x
>
>
> Sent from my waxed string and tin cans.
>
> > On May 28, 2020, at 1:15 PM, Lou W0FK <[hidden email]> wrote:
> >
> > It’s E850824, KPA1500 PS Minimum Load Kit
> >
> >
>

Dave wo2x

Re: KPA1500 PSU fan mod - Need resistor

They originally sent me a load resistor that looks like a TO220 style transistor. That connects to PSU 50 volt output to have some load on PSU when in standby, this reducing birdies on 80 meters.

They are sending me another parts (resistor?) to lower PSU fan speed which when idle PSU fans are loudest thing in shack

73
Dave wo2x

Sent from my waxed string and tin cans.

> On May 31, 2020, at 6:00 PM, Eric Norris <[hidden email]> wrote:
>
>
> I am still a bit confused by this, as I thought I was installing both--it consisted of two parts. Please share what you hear from Support.
>
> 73 Eric WD6DBM
>
>> On Thu, May 28, 2020, 1:21 PM Dave <[hidden email]> wrote:
>> Hi Lou
>>
>> I think the PS minimum load kit is different than the resistor change to slow down the PSU fans. I have already done the minimum load resistor which helps to reduce the birdies on 80 meters.
>>
>> What I am referring to is a resistor change done in production which slows down the PSU fans when the amp is idle in standby. I have not had confirmation back from support on this yet. Support is sending me something today but I believe it is the load resistor which I have already done.
>>
>> Dave wo2x
>>
>>
>> Sent from my waxed string and tin cans.
>>
>> > On May 28, 2020, at 1:15 PM, Lou W0FK <[hidden email]> wrote:
>> >
>> > It’s E850824, KPA1500 PS Minimum Load Kit
>> >
>> >