Re: [Elecraft] KPA500 270V Failure

[Bruce Forsberg]

Thanks to the 2 people who replied. Thanks to Keith VE7KW who had R16 (100
Ohm) SMD resistor fail on his PS board in his KPA500. I had the same
problem here. R16 tested open. It does not appear to be cracked or burnt,
just a failure. R16 appears to be a resistor that feeds the voltage
multiplier circuit for the 270V line.

Bottom line is my KPA500 is back in service.

Bruce, WB6IZG

On Sun, Jul 25, 2021 at 2:30 AM Bruce Forsberg 
wrote:

> Today when using my KPA500 I switched it into operate mode from standby
> and received an error message of 270V ERR. This is the first time I have
> seen this error. I partially disassembled the amplifier and measured the
> 270V voltage and it is 70V, which is close to what the HV voltage measured
> on the front panel says. After finding some old outdated schematics on the
> internet it looks like there is a diode capacitor voltage
> multiplier circuit that takes the HV voltage of approx 70V and brings it up
> to 270V. I am assuming I have lost one of the diodes in the chain.
> Unfortunately Elecraft has used tiny diode packs and even put 2 of the 3
> packs between electrolytic capacitors on the board, which I will have to
> remove. Has anyone else seen this problem with their KPA500? And how did
> you go about fixing this?
>
> Thanks,
> Bruce, WB6IZG
>
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Re: [Elecraft] Frequency shifts of KX3 when selecting CW?

[Don Wilhelm]

Tom,

As an experiment, try tuning the KX3 to a valid ham band like 160 meters 
in AM mode, then switch to CW.

What happens?

1.000 MHz is in the middle of the AM broadcast band, so that is not a 
good example.  I am thinking perhaps this is built into the KX3 firmware 
to prevent transmitting CW on the AM broadcast band - but that is just a 
guess.


73,
Don W3FPR

On 7/26/2021 2:05 PM, Tom wrote:

Hi
I don't recall this happening before, but if I am tuned to a signal lets say
at 1.000 MHz in AM and then I switch to CW, the frequency display on the
radio changes to 1.600 MHz.
My K3 and KX2 do not do this.  Is there a setting somewhere?
I did drop my KX3 at one point recently so I am wondering if a button or
worse was pressed.
Thanks, Tom




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Re: [Elecraft] NABBLE

[Keith Trinity WE6R]

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[Elecraft] Frequency shifts of KX3 when selecting CW?

[Tom]

Hi
I don't recall this happening before, but if I am tuned to a signal lets say
at 1.000 MHz in AM and then I switch to CW, the frequency display on the
radio changes to 1.600 MHz.
My K3 and KX2 do not do this.  Is there a setting somewhere?
I did drop my KX3 at one point recently so I am wondering if a button or
worse was pressed.
Thanks, Tom


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[Elecraft] XV-144

[Ken Roberson via Elecraft]

Hello all,
Anyone have a XV-144 for sale contact my via email - my email is good on 

QRZ - Thanks Ken K5DNL
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Re: [Elecraft] Off topic - musical composition

[Eric Swartz]

Folks, we've drifted way off the core focus of this list with this OT
thread.  In the interest of keeping the SNR high here and relieving email
overload fatigue for others, please take this thread off-list.

Thread closed.

73,
Eric
List moderator etc..
*elecraft.com *


On Sun, Jul 25, 2021 at 7:53 AM Richard Lawn  wrote:

> I think the answer to that joke is “vibrato” though I heard it as the
> difference between the saxophone and a chain saw! Though I hate to
> disrespect my own instrument (Sax not chain saw )
>
> 73
> Rick, W2JAZ
> --
> Sent from Gmail Mobile
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Re: [Elecraft] Off topic - musical composition

[Alan - G4GNX]

I fear we're going to get out of control but

How many folk singers does it take to change a light bulb?

10 - One to change the light bulb and the other 9 to sing about how good 
the old one was.


and just to take it completely off-topic:

How many software engineers does it take to change a light bulb?

NONE - It's a hardware problem.

73,

Alan. G4GNX


-- Original Message --
From: "John Payne" 
To: Elecraft@mailman.qth.net
Sent: 26/07/2021 14:18:13
Subject: Re: [Elecraft] Off topic - musical composition


How many guitar players does it take to change a light bulb?

12!!  One to change the bulb and the other 11 to sit around saying "I can do 
that".

73 de John W4CWZ



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Re: [Elecraft] Off topic - musical composition

[John Payne]

How many guitar players does it take to change a light bulb?

12!!  One to change the bulb and the other 11 to sit around saying "I 
can do that".


73 de John W4CWZ

On 7/25/2021 12:14 PM, l...@ka7ftp.com wrote:

Now you are just picking on the old banjo...

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of n4kd
Sent: Sunday, July 25, 2021 9:37 AM
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] Off topic - musical composition

Since you brought up chainsaws, I can compare it to my favorite instrument.

What’s the difference between a banjo and a chainsaw?

A chainsaw has a dynamic range!

- 73,
Dave N4KD


On Jul 25, 2021, at 09:54, Richard Lawn  wrote:

I think the answer to that joke is “vibrato” though I heard it as the
difference between the saxophone and a chain saw! Though I hate to
disrespect my own instrument (Sax not chain saw )

73
Rick, W2JAZ
--
Sent from Gmail Mobile
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delivered to l...@ka7ftp.com


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[Elecraft] ARR SP 144 VDG for sale

[Howard Sherer]

I have a like new 2M Advanced Receiver Research receive pre amp for sale.
Great for the K3 and transverter. This is the RF switched high gain low NF
unit. I will take $120. including USPS shipping within the US.

Howard AE3T
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