From: Mike Dorworth,K4XM [EMAIL PROTECTED]
The total power pulled from power supply determines
effeciency. A low level and linear consumes less power for same carrier
power. See some KW mobile rigs from years ago.
also I remember WCKY had 500,000 watts modulated carrier ( 2 megawatts pep)
Donald Chester wrote:
Gary K4FMX said:
The best quality audio of all can be gotten from low level modulation
and a linear amplifier.
A linear amplifier has the same kind of distortion as a class-B modulator.
That's true except with a linear amp most of the distortion products
fall
[EMAIL PROTECTED] wrote:
I have a junker HW-100 with a good PA
section. How much power could I run as a linear amp using 2X6146 and what
rating power supply would I need? Thanks.
Ed K6UUZ
25 watts carrier with 100 watts pep output on the 6146's.
73
Gary K4FMX
Thanks, Gary.
Ed K6UUZ
On Mon, 11 Jul 2005 22:58:26 -0400 Gary Schafer [EMAIL PROTECTED]
writes:
[EMAIL PROTECTED] wrote:
I have a junker HW-100 with a good PA
section. How much power could I run as a linear amp using 2X6146
and what
rating power supply would I need? Thanks.
[EMAIL PROTECTED] wrote:
Thanks, Gary.
Ed K6UUZ
On Mon, 11 Jul 2005 22:58:26 -0400 Gary Schafer [EMAIL PROTECTED]
writes:
because of the class of service.
read here (http://www.qsl.net/wa5bxo/asyam/aam3.html) for a good explanation
of everything related.
73 = Best Regards,
The plate dissapation of the 6146's is the key. Your carrier steady on
should not exceed the dissapation rating. This is about 50 watts if I
remember right which would give you 200 watts PEP. So your power suppl;y
should be capable of about 150 watts continuous and it will handle the 200
watts on
do not cathode modulate well.
Healthfully yours,
DON W4BWS
- Original Message -
From: Byron Lichtenwalner [EMAIL PROTECTED]
To: Discussion of AM Radio amradio@mailman.qth.net
Sent: Monday, July 11, 2005 8:54 PM
Subject: Re: [AMRadio] power ratings
Ed
Shows you
Rev. Don Sanders wrote:
Ye3s but the cost of a good modulation transformer for 300 watts or more
would be as much as a SB200. Actually for a good rig you could run a pair of
813 or a high power triode similar tube at about 800 watts and cathode
modulate at 400 watts. This is cost effective and
The plate dissipation of the 6146's is the key. Your carrier steady on
should not exceed the dissipation rating. This is about 50 watts if I
remember right which would give you 200 watts PEP. So your power suppl;y
should be capable of about 150 watts continuous and it will handle the 200
watts
Donald Chester wrote:
The plate dissipation of the 6146's is the key. Your carrier steady on
should not exceed the dissipation rating. This is about 50 watts if I
remember right which would give you 200 watts PEP. So your power suppl;y
should be capable of about 150 watts continuous and it
@mailman.qth.net
Sent: Tuesday, July 12, 2005 2:39 PM
Subject: Re: [AMRadio] power ratings
I've been using linear amps in AM service for a few year now. With
current
band conditions, it seems to me that a goal should be at least 300 watts
of
carrier. Sure you can make contacts with 25-50 watts
Rev. Don Sanders wrote:
Ken, as I read the rules, we are only allowed to run 375 watts carrier.
this is wrong. There is -no- maximum carrier limit. The only maximum
power limit imposed on
Ham Radio operators is 1,500W PEP output, regardless of mode.
1,500W PEP output on AM, -would- be
In fact, since many people refuse (or just don't know how) to click on a
link, allow me to paste some of that here, that is germane to the
overall discussion of power levels, ratings, and class of operation of a
tube.
-Geoff/W5OMR
=
Ken, as I read the rules, we are only allowed to run 375 watts carrier.
With 100% modulation this will give us 1500 watts pep which is the max
output allowed.
***Don, You are correct about the 1500 watts PEP. It could also be
derived by 600 watts of carrier with much less than 100%
Seattle, Wa.
REAL RADIOS GLOW IN THE DARK
- Original Message -
From: kenw2dtc [EMAIL PROTECTED]
To: Discussion of AM Radio amradio@mailman.qth.net
Sent: Tuesday, July 12, 2005 5:30 PM
Subject: Re: [AMRadio] power ratings
Ken, as I read the rules, we are only allowed to run 375 watts carrier
, July 12, 2005 5:30 PM
Subject: Re: [AMRadio] power ratings
Ken, as I read the rules, we are only allowed to run 375 watts carrier.
With 100% modulation this will give us 1500 watts pep which is the max
output allowed.
***Don, You are correct about the 1500 watts PEP. It could also
Gary Schafer wrote:
The best quality audio of all can be gotten from low level modulation
and a linear amplifier.
73
Gary K4FMX
However, highly non-efficient.
---
73 = Best Regards,
-Geoff/W5OMR
But if you want broadcast quality audio you need a real plate modulated
rig
The best quality audio of all can be gotten from low level modulation and a
linear amplifier.
***I disagree with both statements above. If properly set up and fixed
with the proper audio chain, a plate
However, highly non-efficient.
Actually not TRUE. The total power pulled from power supply determines
effeciency. A low level and linear consumes less power for same carrier
power. See some KW mobile rigs from years ago.
also I remember WCKY had 50 watts modulated carrier ( 2 megawatts
kenw2dtc wrote:
But if you want broadcast quality audio you need a real plate modulated
rig
The best quality audio of all can be gotten from low level modulation
and a linear amplifier.
***I disagree with both statements above. If properly set up and
fixed with the proper audio
Geoff wrote:
Gary Schafer wrote:
The best quality audio of all can be gotten from low level modulation
and a linear amplifier.
73
Gary K4FMX
However, highly non-efficient.
---
73 = Best Regards,
-Geoff/W5OMR
Efficiency doesn't matter anymore for hams. Output power is the
Gary Schafer wrote:
Geoff wrote:
Gary Schafer wrote:
The best quality audio of all can be gotten from low level
modulation and a linear amplifier.
However, highly non-efficient.
Efficiency doesn't matter anymore for hams. Output power is the
limiting factor not input power.
I
Didn't this subject get beat to death back in January of this year?
Dennis D. W7QHO
Glendale, CA
Sorry about this. I must have hit a wrong key and sent the message before
I was done.
Ed K6UUZ
On Mon, 11 Jul 2005 08:42:39 -0700 [EMAIL PROTECTED] writes:
I thought I understood these things, But I have confused me little
self.
I need some clear thinking here. I have a rice box rated for
You will get lots of answers. the short and correct answer is 100 watts
carrier with peaks to 400 watts. I run a similar one at 150 watts carrier
for short periods. The reason the ricebox drops to 25 watts is because it is
100 pep am under those conditions about 17 watts is what I use to drive my
SSB amps make poor AM amps, partly because they are built for the very small
average
power output/duty cycle.
I would say AL-811 is good for about 100 watts carrier output tube wise,
but the power supply may not be up for it.
Many amps of that type use voltage doubler or tripler circuits,
and
[EMAIL PROTECTED] wrote:
I thought I understood these things, But I have confused me little self.
I need some clear thinking here. I have a rice box rated for 100 watts
SSB or 25 Watts AM. I believe the 100 watts is PEP while the 25 watts is
RMS (continuous carrier). I want to add a linear
Your statement sounds pretty close to me. For instance, I set my TS-430S
carrier level for about 1/3 of full carrier (Ip)capability, then adjust
the mic gain control until it sounds OK on my monitor or to a live contact.
Do not use a compressor at all. IMHO. Good luck. 73 K0NG .
Quoting
Ed
Shows you what high level modulation can do, with finals running in Class C
vs. the amp running in linear mode.
Byron, W3WKR
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