Re: [Elecraft] Regarding 40 meter SSB net.

[Dave Erickson]

On 7/22/2021 8:01 PM, Steve Hall wrote:

Dave,
Thanks for checking into the 40 meter SSB net.   Hope to hear you regularly
on the net.
Eric, WB9JNZ relayed you in, as the conditions were very difficult and I
could not hear you directly.
Steve, WM6P


Thanks Steve,

And thanks Eric for the relay. Hopefully the band will be better this 
weekend.


Take care.

--
Dave Erickson
AB0R
73
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[Elecraft] Regarding 40 meter SSB net.

[Steve Hall]

Dave,
Thanks for checking into the 40 meter SSB net.   Hope to hear you regularly
on the net.
Eric, WB9JNZ relayed you in, as the conditions were very difficult and I
could not hear you directly.
Steve, WM6P
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[Elecraft] I Keep Getting Kicked Out

[kg6mzs]

Hi,

I keep getting kicked off the reflector for the stated reason of too 
many bounces.  How come no other list seems to have this problem?


I'd love to stay subscribed to the list but re-applying is becoming too 
onerous.


Is there anything we can do to remedy this problem?

Sincerely,

Eric Fitzgerald, KG6MZS

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[Elecraft] K3 DVR comes and goes?

[Jeff Kinzli N6GQ]

Hey y'all, I have an old K3 that we upgraded to K3S a few years back. It
also has a DVR unit in it. All firmware is current.

Today upon powerup the DVR didn't work - showed as not installed and
obviously didn't work.

I powered off the radio and back on again, and there was the DVR, working
again as usual.

I'm thinking the contacts may need cleaning on the DVR/pins - but also
wondering if there's other things that I should check. I'm taking the radio
on a dxpedition soon and want everything to work properly.

Thanks,

Jeff N6GQ
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Re: [Elecraft] In Line Power Pole Fuses

[Bill Frantz]

I'm in general agreement with Bob, but there are some details.

(1) You don't want to melt you power supply wires. If you trust 
the power supply device to properly current limit, then you 
don't need a fuse. If you are using something like my old 
solar/deep cycle battery supply, you definitely need a fuse.


(2) The important thing about voltage drop is getting enough 
voltage to the final amp in the radio to avoid producing all 
kinds of distortion in the output signal. This distortion 
results in a bad signal that causes interference with neighbors 
on the band. If you are running 14.5 volts receive load, you can 
afford a bigger voltage drop than if you are running off of 
batteries at 12 volts receive load.


In this latter case, you probably can't afford any voltage drop 
at all and should throttle back to a maximum of 50 watts or so 
to clean up your signal.


Our real-life experience was one Field Day with our QRP digital 
K3 station. The deep cycle lead/acid battery was getting tired. 
The people in the CW tent were complaining of interference from 
the digital station. A fresh battery fixed the problem.


73 Bill AE6JV

On 7/22/21 at 6:27 AM, rmcg...@benlomand.net (Bob McGraw) wrote:

With that power supply, which has both good over voltage 
protection and current limiting, adding fuses in the DC line 
will add resistance to the line.  Even being a small amount, 
it will affect voltage regulation from no load to rated load at 
the radio.    For this reason I do not recommend adding 
fuses to the DC power cables.


I agree that all 100 watt transceivers should have their DC 
power leads connected direct to the power supply terminals and 
not through any DC distribution device.    As a rule, 
receive load to 100 watt CW/key closed transmit load, the 
voltage drop at the radio should be less than 0.5 volts.


Bill Frantz| Art is how we decorate space,
408-348-7900   | music is how we decorate time.
www.pwpconsult.com |  -Jean-Michel Basquiat

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[Elecraft] Birthday Assistance to ask

[Craig Wissman]

Hi

How are you doing, I want to ask you for an assistance
Do you normally order from amazon?

Thanks.
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Re: [Elecraft] KX2 not remembering Mic gain setting on ADATA

[Gareth M5KVK]

It appears the problem is more deep-seated.

I’m away /P right now and decided to do some FT8 using a Raspberry Pi. I set up 
the Tx drive (seemingly) OK, by pressing Tune on WSJT-X and adjusting Tx level 
and Mic gain to get the right amount of ALC.
However, when I then try to Tx again, TX LED lights but there is no drive. A 
Very slight nudge of the MIC gain causes 5-bars on the display, but next time I 
Tx it’s back to no drive.

Has anybody else experienced this?

Gareth

From: Gareth M5KVK 
Date: Saturday, 10 July 2021 at 14:53
To: "elecraft@mailman.qth.net" 
Subject: Trouble using MH3 microphone with KX2

Hi all
I’ve typically been using my MH3 with a KX3 for /P operating from my campervan. 
This last week I’ve been doing some SOTA activations, so I’ve been using my KX2 
instead.

I noticed a couple of issues when setting the Mic gain.

I followed the advised procedure and reduced PWR=0, TX CMP=0, squeezed the PTT 
and spoke normally into the MH3. I found that there was no indication at all on 
the ALC meter until at about MIC=65, ALC jumped to 6-7. Mic bias is on.

I also noticed on a few occasions that when operating, pressing PTT had no 
effect until I slightly increased the MIC gain.

The MH3 works fine on my KX3, so I’m assuming the MH3 is OK, but I can’t figure 
where the problem lies.

73

Gareth – M5KVK
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Re: [Elecraft] KIO3B Board

[w1rm]

The board is definitely not happy.  I plugged the aux cable into my KPA500
and as I cycle through the bands I keep getting invalid on the KPA500 screen
when it comes to band.  I have a call into Elecraft support.


Pete Chamalian, W1RM
w...@comcast.net

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of John Simmons
Sent: Wednesday, July 21, 2021 9:13 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] KIO3B Board

Pete,

You might try one of these:
https://www.amazon.com/CableMax-RS-232-link-Tester-Female/dp/B004OT995U/ref=
sr_1_3?dchild=1=serial+port+tester=1626916237=8-3

It will tell you if the serial output of the KIO3B is working.

73,
-de John NI0K rural Debs, MN

w...@comcast.net wrote on 7/21/2021 7:59 PM:
> Is there a way to test this board?  I suspect mine has bitten the dust 
> because it's no longer sending frequency data via cat line to my amp.
>
>   
>
>   
>
> Pete Chamalian, W1RM
>
> w...@comcast.net
>
>   
>
> __
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> list: http://www.qsl.net/donate.html Message delivered to 
> jasimm...@pinewooddata.com

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delivered to w...@comcast.net 

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[Elecraft] In Line Power Pole Fuses

[Bob McGraw]

With that power supply, which has both good over voltage protection and 
current limiting, adding fuses in the DC line will add resistance to the 
line.  Even being a small amount, it will affect voltage regulation from 
no load to rated load at the radio.    For this reason I do not 
recommend adding fuses to the DC power cables.


I agree that all 100 watt transceivers should have their DC power leads 
connected direct to the power supply terminals and not through any DC 
distribution device.    As a rule, receive load to 100 watt CW/key 
closed transmit load, the voltage drop at the radio should be less than 
0.5 volts.


73

Bob, K4TAX


Message: 19
Date: Wed, 21 Jul 2021 19:18:48 -0700
From: Peder Kittelson
To:Elecraft@mailman.qth.net
Subject: [Elecraft] In Line Power Pole Fuses
Message-ID:

Content-Type: text/plain; charset="UTF-8"

I have fused my Elecraft radio equipment with inline power pole positive
and negative ATC car standard blade fuses.
I am now doing an audit of the fuses in my system to make sure they are
appropriate for the equipment they protect.  I realize there are internal
fuses in many cases, I prefer doubling my protection with inline external
fuses as well.

I have not read or heard anyone discuss the appropriate amperage ratings of
fuses for my equipment or equipment in general.  I would appreciate your
recommendations on fuse sizes for these, as well as general approaches.

Equipment and Specifications from Elecraft Manuals:

1.  Elecraft K3s with 100 watt amp: Specs are 17-22 amps typical on
transmit, recommended 25 amp power supply.

2.  Elecraft KPA 500: Specs are PA Current 20 amp maximum.

3.  Elecraft KX3: Specs are 1-2 amp typical current in transmit.

One other important question.  I have conquered much of the RFI in my radio
room using power poles with extended thick Red and Black wiring wound
around toroids.  In this case the leads go from the Astron RS-35A to the
K3s.  I want to make sure there isn't too much drop in voltage over the
extended toroid wiring.  How can I best gauge what the K3s receives in this
setup? The manual says it should receive 13.8 volts nominal, 11 volts
minimum and 15 volts maximum. I think I am beyond the provided and
recommended 5' power cable.  I have not had any problems (that I know of).

I do not have a desk full of electronic devices for evaluating this, so is
there a simple way to be reasonably sure?

73 and thanks for your help,

W7RPK, Peder


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Re: [Elecraft] In Line Power Pole Fuses

[Dave]

Hi Ray,

Are you currently using a 25 amp?  If so, have you had any issues with 
that, and are you running P3/SVGA, etc?


25 amps seems quite close to the rated current draw of the K3.  I 
believe the K3 can draw 22 amps on full power, and as Jim said, other 
items all add up.


I also mentioned that the fuse is not there to protect the radio, but to 
stop other issues, and that I place the fuse as close to the PS as 
possible to protect the most part of my power wiring.


So for me 30 amps, seems OK.  If I get a PS short, a 30 amp fuse will 
blow almost as quickly as a 25 amp fuse, and that is what my main 
worries are, shorts caused by stupid mistakes on my part, or problems 
within the equipment connected to the radio.


As I mentioned, if the fuse is blowing, and it is a result of radio 
current overdraw, chances are the radio is already broken.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 7/21/21 10:31 PM, Ray wrote:

30 Amp   --- A little too High for me !

I would use 25 Amp.

WA6VAB  Ray  K3

*From: *Dave 
*Sent: *Wednesday, July 21, 2021 7:43 PM
*To: *elecraft@mailman.qth.net 
*Subject: *Re: [Elecraft] In Line Power Pole Fuses

Hi,

I am unsure what you are asking...  If you are asking about fuse values,

I select values a bit above the max peak current I expect.  For my K3 I

use a 30 amp fuse.

If you are asking about voltage drop, and want to know what the K3 sees,

there is a built in volt meter in the K3, (see the manual), which will

show you the voltage at the K3, after all your fusing, and wiring.

I always take my voltage readings at full output.  I try and stay within

the limits Elecraft sets for voltage.  If I am running low voltage on

transmit, I goose the power supply slightly, staying below the max

voltage rating Elecraft recommends when not transmitting at full power.

The fuse(s) is/are probably not going to protect my radio-- if something

happens, (i.e., current draw in excess of 30 amps), the radio is

probably already broken.

I use the fuse to reduce runaway thermal effects, (read that as fire),

on my power supply wiring in the event of a short to ground.  I place

the fuse(s) as close to the power supply as my wiring will allow.

73, and thanks,

Dave (NK7Z)

https://www.nk7z.net

ARRL Volunteer Examiner

ARRL Technical Specialist, RFI

ARRL Asst. Director, NW Division, Technical Resources

On 7/21/21 7:18 PM, Peder Kittelson wrote:

 > I have fused my Elecraft radio equipment with inline power pole positive

 > and negative ATC car standard blade fuses.

 > I am now doing an audit of the fuses in my system to make sure they are

 > appropriate for the equipment they protect.  I realize there are internal

 > fuses in many cases, I prefer doubling my protection with inline external

 > fuses as well.

 >

 > I have not read or heard anyone discuss the appropriate amperage 
ratings of


 > fuses for my equipment or equipment in general.  I would appreciate your

 > recommendations on fuse sizes for these, as well as general approaches.

 >

 > Equipment and Specifications from Elecraft Manuals:

 >

 > 1.  Elecraft K3s with 100 watt amp: Specs are 17-22 amps typical on

 > transmit, recommended 25 amp power supply.

 >

 > 2.  Elecraft KPA 500: Specs are PA Current 20 amp maximum.

 >

 > 3.  Elecraft KX3: Specs are 1-2 amp typical current in transmit.

 >

 > One other important question.  I have conquered much of the RFI in my 
radio


 > room using power poles with extended thick Red and Black wiring wound

 > around toroids.  In this case the leads go from the Astron RS-35A to the

 > K3s.  I want to make sure there isn't too much drop in voltage over the

 > extended toroid wiring.  How can I best gauge what the K3s receives 
in this


 > setup? The manual says it should receive 13.8 volts nominal, 11 volts

 > minimum and 15 volts maximum. I think I am beyond the provided and

 > recommended 5' power cable.  I have not had any problems (that I know 
of).


 >

 > I do not have a desk full of electronic devices for evaluating this, 
so is


 > there a simple way to be reasonably sure?

 >

 > 73 and thanks for your help,

 >

 > W7RPK, Peder

 > __

 > Elecraft mailing list

 > Home: http://mailman.qth.net/mailman/listinfo/elecraft

 > Help: http://mailman.qth.net/mmfaq.htm

 > Post: mailto:Elecraft@mailman.qth.net

 >

 > This list hosted by: http://www.qsl.net

 > Please help support this email list: http://www.qsl.net/donate.html

 > Message delivered to d...@nk7z.net

 >

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[Elecraft] K3/10 sold

[Douglas Zwiebel]

Thanks guys.

de Doug KR2Q
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Re: [Elecraft] Nabble

[Bill Tippett]

Down here also John (several days now).

73,  Bill  W4ZV
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Re: [Elecraft] In Line Power Pole Fuses

[Jim Brown]

On 7/21/2021 10:49 PM, Rick NK7I wrote:

25 amp fusing isn’t a lot over overhead for a K3 with KRX3, KIO3a, P3 with the 
SVGA board and the PR6-10 preamp in play.


A study of fuse (and breaker) specs is worthwhile. In general, fuses are 
rated by average current, with considerable allowance for spikes and 
surges above that. A standard fuse (not a Slo-Blo) will not blow on 
spikes 25% higher than it's nominal rating, and fuses have time 
responses. We want fuses and breakers to pop when something breaks, not 
when there's an unusual spike that doesn't persist.


My most personal experience with fuses blowing on my gear has been with 
TenTec Titans that I ran for years. Generally quite reliable, but mains 
fuses would blow on crap on the AC line, not on equipment failure, which 
is what they are intended to prevent. Both sides of the line are fused, 
and if equal ratings, both will blow. I soon realized that a 20A fuse on 
one side and 30A on the other was a very good idea.


73, Jim K9YC
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