Not bad shape at all Al! Not nearly as dirty as I though it might
have been from your description. Congrats on saving one of the great
old AM broadcast Tx's out there. Sad to hear about the demise of the
old AM station however.
73 & good luck!
Brian / wa5am
On Sat, Nov 22, 2008 at 8:44 PM, R
Nice set of pictures, Al.
Someone elected to use the JAN version of the Eimac 4-400, at least a couple of
examples out of the four in there. So what if the tubes are 20+ years old.
Did you catch any other loot out of there? Nice that they sent along some
spare tube stock, that's always helpful
It was a sad day when the Kingfish died in July 1971. I was SWL'ing in those
days.7295 was the holdout against the ssb crowd. Sally was in Waynesville,
N.C. Sid was in East Point, GA and I can't remember the town in SC where Jim
W4DXW was in.I heard Sid mobile several times running a Gonset G-76
I talk to Boyd, W4ZWE regularly. He is in a little town called
Channing, TX which in adjacent to Boy's Town of movie fame. He has
some AM gear but is not as active as years past on AM. His signal
into the South of Oklahoma is very good. In fact I helped him
locate the mounting hardware for
I volunteer to be one of the mass heterodyne generators. :>)
Say when and where.
Charlie, K0NG
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L
Next question.
Many of us have low powered AM transmitters like the small Heath DX series with
some form of screen modulation.
These transmitters previously did OK on 40M and up. 15M and 10M don't really
require high power.
But what about 20M. It seems to me that to play on 20M a GOOD linear i
The DX Series do "okay". But an amplifier does wonders whether on 40M,
80M, or any other band.
We are experiencing a VERY low sunspot cycle. Conditions are horrible.
Even KW stations don't reach much.
Bob - N0DGN
Bob Macklin wrote:
Next question.
Many of us have low powered AM transmit
I personally would not even try to get on 14286 unless I had the legal limit
or close to it.Too many slopbuckets to deal with on 20.Low power with a lot
of antenna might work. But I understand your situation with the antenna
part. If I ever put the DX-60 back on, I am going to build an external
speaking of the DX series, at reduced power whats the max key down time say
with rtty on these or other rigs like the DX-100 or Apaches??
George WA8SCO
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How about the AM operators of the past on 75m? Anyone remember WA5FHP, Paul,
in DeQuincy, LA? He used to have running battles with the slopbuckets on
3950 back in the 1960's and 1970's, maybe even early 1980's.
Joe W4
George,
Good question! There is NO mention of RTTY operation ANYWHERE in the
Apache Manual.
I'm also not sure how you can safely reduce the power out put following
the tuning procedures, WITHOUT doing some damage to some components.
It does just fine on AM and CW. Mixed results on SSB wit
Can't you just run at reduced input by reducing the loading? Then run the
tube(s) at the CCS rating. The power transformer should take that.
Bob
K5MYJ
- Original Message -
From: "rbethman" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amateur Service"
Sent: Sunday, November 23,
I've had several complete and quite enjoyable 20 meter AM contacts running
only my TS570, which is my only functioning AM rig at present.
Granted, most of the other stations were running full power, or at least a
Viking II power level.
But, if you can get into a qso on 20 with a reasonably good
While we're talking about activity, or the lack thereof, I'll go ahead and
toss out my usual reminder to make lots of noise on 15 meters if you hear
strong SSB signals there over the holiday weekend.
I'm not hearing anything there this afternoon, but during the contest last
weekend, signals wer
This coming weekend is the CQWW CW contest so that should give us some idea
of the propagation conditions assuming you can read the IDs!
Bob
K5MYJ
- Original Message -
From: "Mike Duke, K5XU" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio"
Sent: Sunday, November 23, 2008 12:27 PM
Subjec
Can't you just run at reduced input by reducing the loading? Then run the
tube(s) at the CCS rating. The power transformer should take that.
Bob
K5MYJ
- Original Message -
From: "rbethman" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amateur Service"
Sent: Sunday, November 23,
Never ran more then 100 to 120 watts on 20M and made lots of AM contacts
with the Apache or the 756 PRO II into a SB-200. Of course, a tri-bander
helps a lot too.
Pete, wa2cwa
On Sun, 23 Nov 2008 14:54:59 -0600 "Joe Crawford" <[EMAIL PROTECTED]>
writes:
> I personally would not even try to get o
Why would RTTY operation be any different then AM operation? And with
rigs like the Viking II, DX-100, Apache, etc., you can probably key down
for many many minutes. i.e. "old buzzard transmission" which are quite
common.
Pete, wa2cwa
On Sun, 23 Nov 2008 15:14:09 -0500 rbethman <[EMAIL PROTECTED]
Bob,
While the plate transformer may well handle that, you are tuning off
resonance of the PI network. That results in tuning off the Plate dip.
I would NOT imagine that this concept would do the 6146s any good at all.
I would suspect that a reduction of Drive would be wiser.
Bob - NoDGN
But what about PW power of the small DX series units?
How much AM carrier power to the current RICEBOX transceivers generate?
Bob
K5MYJ
- Original Message -
From: "Peter Markavage" <[EMAIL PROTECTED]>
To:
Sent: Sunday, November 23, 2008 12:42 PM
Subject: Re: [AMRadio] Low Power AM?
>
Pete - I wholeheartedly agree, EXCEPT that MANY RTTY transmissions are
are images. Those CAN be very long - way beyond "old buzzard
transmissions". Hence my surmise that reducing drive would be the
wisest method.
Bob - N0DGN
Peter Markavage wrote:
Why would RTTY operation be any different
Yes, I remember Paul, Wa5FHP very well.
He once told me that he lived in my home town of Newton, Mississippi for a
brief time doing pipeline work, but that was long before I knew anything
about ham radio, and I think even before he was licensed.
I'm not sure if he is still living or not. I heard
I would think most AM transmitters would not mind running RTTY, after all
most of the ww2 military tx's ran RTTY most of the time anyway, esp in the
RAF here, like the Marconi T1509, 350w mainly RTTY. 2x 813 modulating 2x
813 in the PA.
Running the 6146 off resonance or underloaded will damage
The current RICEBOX transceivers generate WITHOUT major distortion is
about 20W.
That is why:
1) use of SM-220 with BP-8 (ensuring clean signal)
2) Feeding my Amp Supply LK-500Z the output.
The DX-60 is about the same output as the ricebox. I feed BOTH in the
LK-500Z.
Otherwise, the old B
No Pete,
I am saying to reduce the load capacitor and maintain the dip on the plate
capacitor.
It's the same as reducing the coupling on a link coupled final.
Bob
K5MYJ
- Original Message -
From: "rbethman" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amateur Service"
Sent: S
Bob,
That is a FAR better idea... 'Otherwise the old BC-610 girl gets warmed
up' I have a BC-375 an ART-13 and a BC-610E to play with, not to mention
the Marconi T1509.
73 Max M0GHQ
- Original Message -
From: "rbethman" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amate
Bob,
I'm NOT Pete. He may feel insulted. LOL
You're using a PI network, NOT a link tuned system. If you reduce
loading, AND maintain plate dip, You will indeed reduse output AND go
NON-RESONANT.
This opens a whole other can of worms.
Bob - N0DGN
Bob Macklin wrote:
No Pete,
I am saying
I don't have room for a BC-610 but I am considering trying to find a Ranger
I can afford. But that will be a few months down the road!
I probably should look for a DX-100!
Bob
K5MYJ
- Original Message -
From: "rbethman" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amateur Servi
The Heath instructions for the DX-60 specifically state that for Novice
operation to only increase the loading to 100ma for Novice operation (75W)
or to 150ma for normal (full power) operation.
Bob
K5MYJ
- Original Message -
From: "rbethman" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio
I remember hearing a guy from Kansas whose call was W0MAE. I think his name
was Doug. He had a Viking 500, and he had the audio really hot.
There was another guy in Hannibal, Mo who I think also ran a 500, but I
don't remember his call.
I usually heard these guys on 40 meters.
On 75, there was
Actually, it reads 125ma for 75W input.
The recheck and set grid drive.
This is a WHOLLY different animal than a Plate Modulated AM rig for RTTY
use. That is what the Apache TX-1 is.
Screen modulation is a horse of a different color.
Not to mention that Novices did NOT have AM privileges.
At 02:46 PM 11/23/2008 -0600, Peter Markavage wrote:
Why would RTTY operation be any different then AM operation? And with
rigs like the Viking II, DX-100, Apache, etc., you can probably key down
for many many minutes. i.e. "old buzzard transmission" which are quite
common.
Pete, wa2cwa
You ar
I hope you have access to a nice strong youthful helper I hired the local
Boy Scouts to move my boat anchors including the Apache, DX-100, the linears
etc etc. Naturally I supervised closely to prevent any "testosterone" moments.
Of all the rigs only one was damaged and that could have happened
I've read the posts, thank-you all. From my aging memory I believe Bob is
right on target, and yes, rtty can go and go and go. I try to keep the
finals happy. I worked at one am station where the finals were so bad we
tuned up by color...management was a bit "thrifty"ok,CHEAP!
George wa8sco
My memory says that you tuned up an 813 until the plate glowed RED! We did
that with 807s also!
Bob
K5MYJ
- Original Message -
From: "George Brand" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amateur Service"
Sent: Sunday, November 23, 2008 1:47 PM
Subject: RE: [AMRadio] Low
At 03:29 PM 11/23/2008, Mike Duke, K5XU wrote:
Speaking of 160, and sometimes 75, whatever became of Steve, N9FOY?
Steve is still among us... but I don't know how often he gets on the
air anymore.
Both of us are still slaving away for Wisconsin Public Broadcasting;
these days that
doesn'
Mike,
You're not alone in using a ricebox for AM. A fair amount of us do. I save
my Viking II for 160 & 75m. On 40 & above, I use a 30 year old Yaesu
FT-301SD, which does about 30W of carrier (I run it at 25, to keep the
finals happy). I usually have pretty decent results with the '301 on
I must be missing something in your words Bob (DGN). If, after operating
at some plate current and RF output using a PI network, and now you want
to reduce output, why would reducing the loading and re-dipping the plate
capacitor (to return to resonance), become "non-resonant" unless the
words that
When I say "maintain the dip" I mean I recheck the dip changing the load
capacitor.
Bob
K5MYJ
- Original Message -
From: "Peter Markavage" <[EMAIL PROTECTED]>
To:
Sent: Sunday, November 23, 2008 2:34 PM
Subject: Re: [AMRadio] Low Power AM?
> I must be missing something in your words Bo
On 11/23/08, Mike Duke, K5XU <[EMAIL PROTECTED]> wrote:
> Yes, I remember Paul, Wa5FHP very well.
>
.
Mike,
The QRZ.com listing still shows Paul as active with a
General Class Licenseborn in 1922 it is showing
so it should be him.
http://www.qrz.com/detail/WA5FHP
73Walter - K5EST - Mi
Pete,
The specific reference he provided was for the DX-60.
The reduction in loading is followed by checking the grid drive NOT
dipping the plate.
I have the complete condensed copy of the manual from Heath which
includes the HG-10.
I agree with check the dip of the final.
Hence my commen
Okay,
Please explain:
Bob Macklin wrote:
No Pete,
I am saying to reduce the load capacitor and maintain the dip on
the plate
capacitor.
Now you say maintain dip with load capacitor. I am indeed Polish, BUT
you seem too JUST have contradicted what you said.
Bob - N0DGN
Bob Ma
I really did not say to maintain the dip with the load capacitor.
When I tune the final of any Pi-network Tx I first set the dip with the
PLATE capacitor. Then I adjust the coupling with the LOAD capacitor. And I
always recheck the dip with the PLATE capacitor after making any adjustment
to the LO
Ok I will ask the stupid question(s). What is the purpose of a
output (Pi, Balanced) network? Is it not to transform the plate
load impedance (everyone knows how to calculate this right?) to
whatever the antenna presents to the output of the transmitter. Is
not the rated power calculated at
Tuning into a good sharp dip would almost by definition show being in resonance.
Now if impedances are matched... don't know.
What happens to the Q of the tank...
and your sidebands.
That's a whole 'nother question.
__
Our Main We
Typical ricebox should run 25-30 Watts (1/4 to 1/3 of the input power) in
order to sound good and remain linear. (assumes 100 Watt radio).
The sound good part depends on the microphone, rig audio capability and last
but not least, the operators voice characteristics. No amount of processing
wil
How does a SEX CHANGE operation effect the operators voice?
Bob
K5MYJ
- Original Message -
From: <[EMAIL PROTECTED]>
To:
Sent: Sunday, November 23, 2008 3:49 PM
Subject: Re: [AMRadio] Low Power AM?
>
> Typical ricebox should run 25-30 Watts (1/4 to 1/3 of the input power) in
> order t
Jim,
I addressed this earlier with my statement that when doing this
"reduction of antenna loading" that THIS puts things into a NON-RESONANT
state.
The only way to do this AND stay resonant would be SOMETHING outside the
radio that DOES resonate.
The 35 ohm antenna you refer to is typical
At 09:21 PM 11/23/2008, you wrote:
How about the AM operators of the past on 75m?
yes I ran AM up till 1969 when mom and dad need SSB to stay in
contact with me as i sailed the sea's and humped the delta.. they
stayed on 3960 and held a net on weekends . Blue Grass Hoot Owl Net..
ran from 6
anyone coming thru southcentral kentucy and looking for a couple
vallants i have two in the shack not being used..
73 Tony
QBE ZUT DE WA4JQS
ANTHONY W. (Tony) DePrato WA4JQS EXTRA - HEAVY
Since 1962
CQ DX HALL OF FAME # 35
DXCC HONOR ROLL - 340
A1-OP FISTS # 10573 SKCC #1227 F.O
More pictures of my project
http://www.dxham.com/2008-11-23/
73,
Al K3TKJ
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List Rules (must read!
>Speaking of 160, and sometimes 75, whatever became of Steve, N9FOY?
I talked to him on 1985 kHz AM a couple weeks ago. He sounded great.
Steve WD8DAS
[EMAIL PROTECTED]
http://www.wd8das.net/
-
Radio is your best entertainment value.
---
Yes, of course you can reduce the loading and redip the tuning to get
lower output. You can also choose various settings of the loading
capacitor to match various load impedances for higher output power.
Another way to think of the loading adjustment is to imagine if varies
how much of th
Why does AM operation seem to be limited to 75M only.
Lots and lots of AM on 160m every night and weekends during the day as
well. Activity centers on 1885 and 1985 kHz, but there is action on
other frequencies as well.
I was working from Wisconsin down to Alabama the other night with >2
Great pictures, Al. Looks like a fun project!
Rick/k5iar
More pictures of my project
http://www.dxham.com/2008-11-23/
73,
Al K3TKJ
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Unless you are talking about some particular rig, this is not so.
I run tubes well under their maximum plate dissipation ratings all the time,
and they last longer that way.
With some setups, you have to watch the screen current, but otherwise, there
is no problem at all.
Triodes surely don'
Al Waller wrote:
More pictures of my project
Looks great Al. Mine's still "in the queue"...like a lot of other projects!
If you're looking for a way to move that 1300 pounds around, take a look
at my low-profile mobile base:
http://smg.photobucket.com/albums/v652/ranickel/Mobile%20Base%
I remember tuning up until the 813´s glowed yellowish-white.
73 Jim SM2EKM
--
Bob Macklin wrote:
My memory says that you tuned up an 813 until the plate glowed RED! We did
that with 807s also!
Bob
K5MYJ
- Original Message -
From: "George Brand" <[EMAIL PROTECTED]>
To
Yes sometimes I use my FT-1000D on AM, if you set it right
it sounds pritty good, I would rate it as a pritty good
ricebox on AM, however it doesn´t give me any good feelings
like the DX-100 does.
/ Jim SM2EKM
--
Ellen Rugowski wrote:
Mike,
You're not alone in using a ri
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