Very impressive indeed. Pre-distortion will hopefully be made available as a
option for the K3 in the future.
That would be a superb option if it does become available.
What these results however do confirm is that pre-distortrion is worth
implimenting and that it does work very well.
de 2015 10:19 a.m.
Para: elecraft@mailman.qth.net
Asunto: Re: [Elecraft] SS30DV feedback
> If higher voltages are needed to clean up the amp, how about a DC to
> DC converter.
How about a higher voltage battery system rather than added complexity in
the transceiver?
73,
... Joe
If higher voltages are needed to clean up the amp, how about a DC to
DC converter.
How about a higher voltage battery system rather than added complexity
in the transceiver?
73,
... Joe, W4TV
On 10/3/2015 12:54 AM, Bill Frantz wrote:
As I run my K3 from batteries at home, and am about
With predistortion coming sooner or later to mainstream radios, higher PA
voltage for 100W is dead issue.
Ignacy
--
View this message in context:
http://elecraft.365791.n2.nabble.com/Re-SS30DV-feedback-OT-tp7608653p7608665.html
Sent from the Elecraft mailing list archive at Nabble.com.
With bias, 12V transistors are class B or AB, not C.
See http://flarc.net/eme-info/PDF/N1JEZ-2.pdf.
He describes an amp changed to Class B (very low bias for little heating).
Regular IMD3 -22db. After predistortion -55db. Plus extra db in additional
power power. All for a cost of feedback +
On 10/3/2015 10:14 AM, Ignacy wrote:
With predistortion coming sooner or later to mainstream radios, higher PA
voltage for 100W is dead issue.
Ignacy
Higher voltage PA and predistortion are completely separate items. Even
with predistortion, good engineering principles mean higher voltage
, October 02, 2015 8:19 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] SS30DV feedback
Hello
I will appreciate feedback from users of the SS30DV power supply with a K3
Are you happy with it? With full power on the K3, the SS30DV is running
comfortable? IS noisy?
If you compare
Hello
I will appreciate feedback from users of the SS30DV power supply with a K3
Are you happy with it? With full power on the K3, the SS30DV is running
comfortable? IS noisy?
If you compare for example with a Samlex SEC-1235M, what do you think?
Thanks very much
73,
Jorge
/CW5W
-Mensaje original-
De: Matt Zilmer [mailto:mzil...@roadrunner.com]
Enviado el: viernes, 02 de octubre de 2015 12:13 p.m.
Para: Jorge Diez - CX6VM
CC: elecraft@mailman.qth.net
Asunto: Re: [Elecraft] SS30DV feedback
Hi Jorge,
I have both power supplies here - SS30DV and the Samlex
I have similar spur issues, approx 30khz apart, with the SS30DV on 40 & 80
meters as well. I do not get any noise from my Samlex 1235M using the same
power cabling and same installation location. I will try the suggested toroid
solution to see if I can get rid of the spurs. I do prefer the
.com]
>Enviado el: viernes, 02 de octubre de 2015 12:13 p.m.
>Para: Jorge Diez - CX6VM
>CC: elecraft@mailman.qth.net
>Asunto: Re: [Elecraft] SS30DV feedback
>
>Hi Jorge,
>
>I have both power supplies here - SS30DV and the Samlex SEC1235M.
>
>Except for the 1235
Hi Jorge,
I have both power supplies here - SS30DV and the Samlex SEC1235M.
Except for the 1235 having voltage and current meters (the SS30 does
not), there is little difference in performance. One thing that might
affect your decision is that the 1235 has an (internally) adjustable
output
We had spurs all over the 80 meter band here on the K3S station that is being
run as a remote, approximately 30 khz apart. The main station 50 ft away (but
on different antennas spaced 100 feet) had no noise. At first we suspected the
OCF dipole, then the networking boxes, then the laptop.
Jorge Diez - CX6VM
CC: elecraft@mailman.qth.net
Asunto: Re: [Elecraft] SS30DV feedback
Hi Jorge,
I have both power supplies here - SS30DV and the Samlex SEC1235M.
Except for the 1235 having voltage and current meters (the SS30 does not),
there is little difference in performance. One thing that mi
m]
Enviado el: viernes, 02 de octubre de 2015 12:13 p.m.
Para: Jorge Diez - CX6VM
CC: elecraft@mailman.qth.net
Asunto: Re: [Elecraft] SS30DV feedback
Hi Jorge,
I have both power supplies here - SS30DV and the Samlex SEC1235M.
Except for the 1235 having voltage and current meters (the
@mailman.qth.net
Asunto: Re: [Elecraft] SS30DV feedback
The SS30DV has +/- bolt terminals on the rear. The K3S is supplied with a power
cable using ring lugs for these bolts on one end, and an APP connector for the
K3S on the other.
One other note, at the 100W operating level, we do not see any
any
cable and
don´t worry about connectors.
Thanks!
Jorge
CX6VM/CW5W
-Mensaje original-
De: Matt Zilmer [mailto:mzil...@roadrunner.com]
Enviado el: viernes, 02 de octubre de 2015 12:13 p.m.
Para: Jorge Diez - CX6VM
CC: elecraft@mailman.qth.net
Asunto: Re: [Elecraft] SS30DV feedback
Hi Jorg
6QL
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Subich, W4TV
Sent: Friday, October 2, 2015 12:33 PM
To: Eric Swartz - WA6HHQ, Elecraft; elecraft@mailman.qth.net
Subject: Re: [Elecraft] SS30DV feedback
On 10/2/2015 12:33
alf Of Joe Subich, W4TV
Sent: Friday, October 2, 2015 12:33 PM
To: Eric Swartz - WA6HHQ, Elecraft; elecraft@mailman.qth.net
Subject: Re: [Elecraft] SS30DV feedback
On 10/2/2015 12:33 PM, Eric Swartz - WA6HHQ, Elecraft wrote:
The SS30DV has +/- bolt terminals on the rear. The K3S is supplied
with a po
Fred et al:
I would agree. When used with decent power cables, good connectors
properly applied and overall length of 4 ft or so, remote sensing will
likely bring more issues to the table than necessary. Additional wiring,
additional connectors and filtering required to keep RF out and the
To me the real solution is to incorporate an internal power supply. I
agree that higher PA voltages will produce cleaner transmitters.
Therefore multiple voltages, no problem, minimized ground loop issues,
reduce number of cables. Only one box to transport as opposed to two.
No extra cables
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of brian
Sent: Friday, October 2, 2015 1:12 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] SS30DV feedback
Fred,
I'm a fan of higher voltage -- perhaps 24 or 40 volts so that PA
We're hitting the posting limit on this one. Let's wind it down in the next 3-4
posts at most. Then thread closed for now.
Eric
/elecraft.com/
On 10/2/2015 4:32 PM, Joe Subich, W4TV wrote:
Doing so reduces any IR drop on power supply wiring by a factor of 2
or 3.
Higher voltage - 24 or 40
Doing so reduces any IR drop on power supply wiring by a factor of 2
or 3.
Higher voltage - 24 or 40 V results in decreasing the voltage drop by a
factor or 4 or 9. The voltage drop is a function of current *squared*.
24 or 48 volt finals certainly produce much cleaner signals as the
active
As I run my K3 from batteries at home, and am about to run in
from batteries in Sierra county for the California QSO party --
no generators permitted where we are. I need battery power for
my normal operations. If higher voltages are needed to clean up
the amp, how about a DC to DC converter.
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