[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,
Anyone else picking up interference from 3810 khz to 3910 khz ?
It sounds like a swept buzzsaw.
10:15 EST QTH is NE Ohio.
de KA4JVY
Mark
__
Do you Yahoo!?
Read only the mail you want - Yahoo! Mail SpamGuard.
For Sale: Heathkit Manuals, E-200-C, etc.
Precision E-200-C Signal Generator. Nice looking shape in every respect.
Leather handle intact. $19
Military AN/PSM-2 ZM-14A Megohmeter with snap-on lid. Cool meter for 0-1000
meghohms with built-in hand-crank generator for test voltage. $19
Heathkit
Mark,
I have something similar here in Round Rock, Texas.
I discovered that my DVD / VCR combo squirts out RF
like crazy whenever it is turned off. Whenever I want
to listen to 75 meters, I need to unplug the POS.
Maybe the interference your seeing is in your own
house, or maybe not. Time
Don, I'm interested in the Megohmeter. Let me know
with shipping to 78681.
Jim
--- Merz Donald S [EMAIL PROTECTED] wrote:
For Sale: Heathkit Manuals, E-200-C, etc.
Precision E-200-C Signal Generator. Nice looking
shape in every respect. Leather handle intact. $19
Military AN/PSM-2
Jim Candela wrote:
Mark,
I have something similar here in Round Rock, Texas.
I discovered that my DVD / VCR combo squirts out RF
like crazy whenever it is turned off. Whenever I want
to listen to 75 meters, I need to unplug the POS.
Maybe the interference your seeing is in your own
house,
Mark Foltarz wrote:
Anyone else picking up interference from 3810 khz to 3910 khz ?
It sounds like a swept buzzsaw.
10:15 EST QTH is NE Ohio.
It's interesting to note, however, that this morning on 75m, a station
15miles away
and running 300w was S-7, while a 175w station 300 Miles away
For Sale. All prices are plus shipping.
GP-7/ARB pair. Both units are reworked and mostly ready to put on the air. Both
units are accessorized out the wazoo with mounts, tuning units, control boxes
and all. The ARB works well (on the original dynamotor) but the wiring to the
control boxes has
Anyone else picking up interference from 3810 khz to 3910 khz ? It sounds
like a swept buzzsaw
***I work the 3870 to 3890 portion of the band and every once in a
while, I hear it slide through the frequency like a slow VFO. Others on
frequency from NJ to Maine also hear it. It's not on
kenw2dtc wrote:
Anyone else picking up interference from 3810 khz to 3910 khz ? It
sounds like a swept buzzsaw
***I work the 3870 to 3890 portion of the band and every once in a
while, I hear it slide through the frequency like a slow VFO. Others
on frequency from NJ to Maine also
I have heard that some consumer electronics that use microcontrollers
operate with FM'ed clocks to reduce the Part 15 emmissions by spreading it
out. And many appernetly use clocks in the 75M range.
Bob Macklin
K5MYJ/7
Seattle, Wa.
REAL RADIOS GLOW IN THE DARK
- Original Message -
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
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 works well. Tetrode tubes
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
Anyone have a (better??) replacement for the doorknob cap in the tank
circuit of a Valiant?
I'm doing an overall re-cap prior to getting on the AM air - I can order
a capacitor that exceeds the specs, but there is the structural question
in that the doorknob is also a spacer.
It's
I would not change it because doorknobs aren't susceptible to age.
Bob
- Original Message -
From: John Lawson [EMAIL PROTECTED]
To: Discussion of AM Radio amradio@mailman.qth.net
Sent: Tuesday, July 12, 2005 4:28 PM
Subject: [AMRadio] Valiant doorknob cap
Anyone have a
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.
I agree 300 watts carrier is almost necessary, however smaller linears wont
handle that and if funds are limited, 150 watts with 600 pep
On Tue, 12 Jul 2005, Bob Maser wrote:
I would not change it because doorknobs aren't susceptible to age.
Shows 420 pF on an LCD cap meter - Sprague Tel-Ohmike (at 600V) shows
220 pF. Cross-testing other (similar) caps shows a very small variation in
readings.
Someday when I'm rich
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%
A comment about AM transmitters. A plate modulated AM transmitter requires a
modulator of 50% of the power of the final to produce 100% modulation. These
transmitters like the Johnson Ranger produce better audo than the screen
modulation units like the small Heaths. Only the Heath DX-100 and TX-1
The best quality audio of all can be gotten from low level modulation
and a linear amplifier.
73
Gary K4FMX
Bob Macklin wrote:
A comment about AM transmitters. A plate modulated AM transmitter requires a
modulator of 50% of the power of the final to produce 100% modulation. These
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
I would like the WA-P2 manual if still available.
Paul
- Original Message -
From: Jim Candela [EMAIL PROTECTED]
To: Discussion of AM Radio amradio@mailman.qth.net
Sent: Tuesday, July 12, 2005 11:27 AM
Subject: Re: [AMRadio] FS: Heath Manuals, E-200-C, etc.
Don, I'm interested in
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
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