Assuming one plans to drive a linear with the rig in class A, current rigs on
the market are rated at 200 watts in B or AB, and 75 watts in class A.
Examples: FT-1000 Mk V or FT-2000D.
>>> k5nwa <[EMAIL PROTECTED]> 7/14/2008 6:33 AM >>>
At 12:45 AM 7/14/2008, Tom Thompson wrote:
>k5nwa wro
At 12:45 AM 7/14/2008, Tom Thompson wrote:
>k5nwa wrote:
>>
>>Curious, was the amplifier designed so it could handle Class A
>>operations? That is a lot of steady heat compared to AB class.
>>
>>
>>
>>Cecil
>>K5NWA
>Cecil,
>
>If the transistors are biased according to their data sheet, they
>shou
k5nwa wrote:
>At 07:30 PM 7/11/2008, you wrote:
>
>
>>If your going to run those tests how about biasing to class A and
>>measure What the heck you might as well blow the competition
>>completely out of the water while your at it.
>>
>>73 W9OY
>>
>>
>>
>
>Curious, was the amplifier desig
At 07:30 PM 7/11/2008, you wrote:
>If your going to run those tests how about biasing to class A and
>measure What the heck you might as well blow the competition
>completely out of the water while your at it.
>
>73 W9OY
>
Curious, was the amplifier designed so it could handle Class A
operati
If your going to run those tests how about biasing to class A and measure What
the heck you might as well blow the competition completely out of the water
while your at it.
73 W9OY
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Bruce,
Well I know through experience that the Kenwoood TS-2000 will start to
distort at 13 volts and motorboat at 12.5, much happier at 14.5 volts.
73,
Dudley
WA5QPZ
Bruce Mills - KL7JDR wrote:
> If the FLEX 5000a transmit audio distortion is caused by voltage sag ?
> Why is this radio more
At 11:33 AM 7/11/2008, Gerald Youngblood wrote:
>Jim,
>There are two levels of voltage regulation between the main supply and the
>DAC: 13.8V --> 5V --> 3.3V.
ooohh.. that's going to be pretty darn good, then. So much for that
wild speculation.
jim
_
Jim,
I seem to recall from earlier posts that the distortion is not preset at the
input to the PA. It is being generated in the PA itself.
73, Ray, K9DUR
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If the FLEX 5000a transmit audio distortion is caused by voltage sag ?
Why is this radio more prone to it than all the other 13v rigs, including the
SDR-1000 ?
73's , Bruce
KL7JDR
Bruce W. Mills
P.O. Box 1500
31490 Echo Lake Road
Soldotna , Alaska
99669
(907)262-4373
[EMAIL PROTECTED]
TECTED]
Sent: Friday, July 11, 2008 12:24 PM
To: [EMAIL PROTECTED]; 'Jerry'; FlexRadio@flex-radio.biz
Subject: RE: [Flexradio] Just how much DC Power Supply sag is acceptable?
At 09:34 AM 7/11/2008, Gerald Youngblood wrote:
>The 5000C power supply is external, just like the 5000A
At 09:34 AM 7/11/2008, Gerald Youngblood wrote:
>The 5000C power supply is external, just like the 5000A
>
>
>From: Jim Lux [mailto:[EMAIL PROTECTED]
>At 08:52 AM 7/11/2008, Gerald Youngblood wrote:
>
> >Hello all,
> >
> >Jerry's comments below are absolutely correct. Distortion should be
> >measu
PROTECTED]; 'Jerry'; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
At 08:52 AM 7/11/2008, Gerald Youngblood wrote:
>Hello all,
>
>Jerry's comments below are absolutely correct. Distortion should be
>measurable using
At 08:52 AM 7/11/2008, Gerald Youngblood wrote:
>Hello all,
>
>Jerry's comments below are absolutely correct. Distortion should be
>measurable using standard two tone lab tests. If you can't measure it, you
>can't quantitatively work on it.
>
>We have Jeff Anderson's (K6JCA) original radio in th
13.63
>
>All of this seems to point towards a voltage drop along the DC power
>chain starting with the power supply, a larger drop seen across the OEM
>supplied power cable, and another large drop where the built in voltage
>meter system in the 5000A is taking its reading.
>
&
At 08:04 AM 7/11/2008, Mike Schlamp wrote:
>Eric,
>
> Thank you very much for answering my question, and the
> explanation; saves me from conducting Jim's test ;) That makes
> perfect sense to me as I suspected something along those lines; a
> sanity check point.
>
> To the rest; yes, I und
dio'
Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
Gerald,
Yes, I understand the relationship between power, voltage, and impedance.
And I do not disagree that a small voltage drop can affect the radio during
transmit, even to the point of causing transmitted distortion.
Original Message-
> From: Jim Lux [mailto:[EMAIL PROTECTED]
> Sent: Thursday, July 10, 2008 10:24 PM
> To: W5CUL
> Cc: [EMAIL PROTECTED]; 'Flexradio'
> Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
>
> Quoting W5CUL <[EMAIL PROTECT
73
>>> 50W: 13.68
>>> 75W: 13.66
>>> 100W: 13.63
>>>
>>> All of this seems to point towards a voltage drop along the DC power chain
>>> starting with the power supply, a larger drop seen across the OEM supplied
>>> power c
Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of W5CUL
Sent: Thursday, July 10, 2008 9:30 PM
To: [EMAIL PROTECTED]
Cc: 'Flexradio'
Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
Gerald,
Yes, I understand the relationship between powe
W5CUL wrote:
> Below are the measurements:
>
> Idle: 13.8
> 5W: 13.7
> 10W: 13.6
> 20W: 13.6
> 50W: 13.5
> 75W: 13.5
> 100W: 13.4
>
> The above measurements were taken using the built in metering system
> (CTRL-SHIFT-I), using the Tune function, output power monitored and adjusted
> using a
power chain
>starting with the power supply, a larger drop seen across the OEM supplied
>power cable, and another large drop where the built in voltage meter system
>in the 5000A is taking its reading.
>
>Thank you,
>
>Mike
>W5CUL
>
>
>-Original Message-
&
PROTECTED]; 'Flexradio'
Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
Quoting W5CUL <[EMAIL PROTECTED]>, on Thu 10 Jul 2008 07:29:59 PM PDT:
> Gerald,
>
> Yes, I understand the relationship between power, voltage, and impedance.
> And I do not d
: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
thats probably wire loss, not your power supply... it needs bigger
cables...
Measure voltage at the power supply for a true reading...
Carl Vangsness wrote:
> The
> RS35M will drop from 14.2 t
75W: 13.66
>> 100W: 13.63
>>
>> All of this seems to point towards a voltage drop along the DC power chain
>> starting with the power supply, a larger drop seen across the OEM supplied
>> power cable, and another large drop where the built in voltage meter system
&g
ower cable, and another large drop where the built in voltage meter system
> in the 5000A is taking its reading.
>
> Thank you,
>
> Mike
> W5CUL
>
>
> -Original Message-
> From: Gerald Youngblood [mailto:[EMAIL PROTECTED]
> Sent: Thursday, July 10, 2008 4:2
Quoting W5CUL <[EMAIL PROTECTED]>, on Thu 10 Jul 2008 07:29:59 PM PDT:
> Gerald,
>
> Yes, I understand the relationship between power, voltage, and impedance.
> And I do not disagree that a small voltage drop can affect the radio during
> transmit, even to the point of causing transmitted distorti
m: Gerald Youngblood [mailto:[EMAIL PROTECTED]
Sent: Thursday, July 10, 2008 4:22 PM
To: 'Flexradio'; 'Mike Schlamp'
Subject: RE: [Flexradio] Just how much DC Power Supply sag is acceptable?
Remember that power is the ratio of voltage squared over impedance. At
13.8V a small voltag
Hi Guys;
The only problem I see with this approach to eliminating sag form the
PSYou MUST now add a Variac to soft start the PS, hi hi
Regards & GL, Darrell
At 06:19 PM 7/10/2008, [EMAIL PROTECTED] wrote:
>This may sound nuts, but if the problem is on the power supply side, as far
>as not be
At 02:56 PM 7/10/2008, you wrote:
>I use an Astron RS-50M DC supply with my 5000A. With 100 watts tune carrier
>into a dummy load the supply voltage drops from 13.7 to 13.3 DC Volts as
>seen using the radio's cntrl-shift-I window. The Astron's Amp meter shows 7
>amps under the 100 watt load and t
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rob Sherwood
Sent: Thursday, July 10, 2008 4:08 PM
To: Robert Cleve; Flexradio; Mike Schlamp
Subject: Re: [Flexradio] Just how much DC Power Supply sag is acceptable?
I don't know how the 5000 is affected by a
This may sound nuts, but if the problem is on the power supply side, as far
as not being able to keep steady voltage during the large current draws, why
not take a tip from these nuts that run 6 gazillion watts of power in their
car audio systems: put a whopping 1 farad cap between the power supply
I don't know how the 5000 is affected by a small drop in Vcc, but the K3 3rd
order IMD degrades significantly with 1/2 volt drop in the cable.
>>> Mike Schlamp <[EMAIL PROTECTED]> 7/10/2008 2:15 PM >>>
Does anyone know, when using the built in voltage meter on the 5000A, where in
the DC powe
Does anyone know, when using the built in voltage meter on the 5000A, where in
the DC power chain is it taking the reading, and how it is doing that function?
That may have some significance in what you see. But using an O-Scope right
where the DC power comes into the radio will tell all.
I use an Astron RS-50M DC supply with my 5000A. With 100 watts tune carrier
into a dummy load the supply voltage drops from 13.7 to 13.3 DC Volts as
seen using the radio's cntrl-shift-I window. The Astron's Amp meter shows 7
amps under the 100 watt load and the Astron's Volt meter doesn't budge a
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