On 2024-01-11, Jim W7RY via groups.io wrote: >> Sure glad I can leave this group with just one click.

Myself, I am enjoying reading people's stories. We sure do have some high-powered folks here.
- Jerry, KF6VB

Sure glad I can leave this group with just one click.

Airplanes, boats and yes, I have both the tube powered and the inline
6 powered TR-6’s!

My Elmer, an SK long ago, sold me his SP-600 receiver to pay for his
new 1970’s Yeasu. I got it at a steep discount, but I had to
promise to keep it running. I still have it, it still runs, had to
get rid of all the Sprague capacitors, etc! Hence my fascination with
all things that glow in the dark.
Bob Coffman, KJ7AJ
2drestoration@...

On Jan 11, 2024, at 5:34 PM, Steve Wedge, W1ES/4 via groups.io [1]
<w1es@...> wrote:
David, are you Acadian?
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent with Proton Mail [2] secure email.
On Thursday, January 11th, 2024 at 4:58 PM, Bob Coffman via
groups.io [1] <2drestoration@...> wrote:
David, Fascinating personal history! I flew F-4’s and F-15’s
in the Louisiana Air National Guard (NAS New Orleans) from
1980-1996, BS Physics, minored in math and geology, University of
Denver. Novice license was WN7VTF in 1970-ish, I was 12. Dad’s
old regenerative receiver and matching 2 tube x-tal transmitter was
about all I could afford in grade school/jr high!
Bob Coffman, KJ7AJ
2drestoration@...
On Jan 11, 2024, at 12:23 PM, David <david.w5xu@...> wrote:
Michael Smith:
I wish to thank you for your well crafted response. I am sorry to
you and to all if I overreacted. I was in the Mechanical and
electrical consultant field for 45 years and it is hard for me to
see blatant opposition for logic and order. I apologize to you and
to the like minded others.
Some background may help to soften the automatic critical answers I
get:
I started dabbling with radios before I was a ham. I think it
started when one of the family radios went out. I was a freshman in
high school then. My summer jobs varied, but with the newfound
interest, I directed it toward radio. My very first job was to
deliver the New Orleans Item afternoon newspaper. I was 9 years
old. The summers were spent with this. My first year of college
(1964) I was astounded at the cost of the education. It was at
Loyola Univ in New Orleans and it was $770 a semester!
I had worked at a radio and tv repair shop for two summers. Used
this to augment the radio repair hobby. After high school I went to
work (again, summer time vacation fill in work) at WDSU TV in New
Orleans. I did that for three years.
Cutting those years short: I graduated in 1967 with a degree in
Physics and minors in Math and Chemistry. It was at Loyola that in
a search for a quiet place to study, I found W5LJY, the Loyola HAm
Radio Station. It was there that members of the club got me
interested in Ham Radio. I was licensed in Dec 1964.
After Loyola and after a few divergent course maneuvers, I started
LSU in Baton Rouge for graduate school in Electrical engineering.
The summer after my first year I was drafted. The Army recruiter
told me that I wouldn't be going to Vietnam as I would likely think
before I pulled the trigger (a quote) and they wanted someone who
would just pull the trigger, so I ended up in the air force fixing
radios and radar in fighter aircraft.
In 1969, I married and moved to Baton Rouge to continue my
education. Since I was then married, I got a job at WAFB TV in
Baton Rouge essentially in the same role as before. Except this one
was how I financed my family. With work and with National Guard
Service, I finally graduated from LSU with a Masters in Electrical
Engineering. My growing family, work and a career start in the
Consulting Engineering field kept me busy. A typical day while
still in school: First was a class either at LSU or Southern where
I taught either Lab work at LSU or at Southern, teaching
communications using my experience in the TV industry. Then I
attended classes/ studied and at 5 PM or so, when the late night
shift started at the TV station, I went there and worked till sign
off. Home, rest and repeat.
When I got the fortunate opportunity to enter into the Consulting
field (I designed HVAC, lighting, plumbing, fire protection and
alarm systems for buildings: my work was from coast to coast, from
Aruba to Canada). THis job allowed me to give up the work of
teaching and TV work. While I tried to continue with a PhD program,
I could not find a University that would hire me for teaching while
working toward a degree, so I was most fortunate to be given an
opportunity to change paths.
All of this meant I had to give up HAm Radio for a while and I was
off the air for 19 years. When I was more or less settled (in Baton
Rouge), I erected a small 40 ft. tower, a tribander and pulled out
my original radios, a Drake R4B, Heathkit SB400 and a homebrew
linear using a pair of 4-400 tubes. I was on the air.
I attended a Dayton hamvention in the mid 1990's for the specific
reason to find a Sherwood modified R4C and T4XC. At the convention
I found 2 of them, bought one and then (in those days) hand carried
both boxes on board the airplane and brought them home. I
completely restored both boxes and for the next WWDX CW contest, put
them on the air, barefoot with the tribander. That weekend I worked
DXCC (all CW) and took advantage of the wonderful band conditions.
To shorten further, this rewarding restoring experience caused me to
start a collection of various ham stuff, mostly Drake. Now the
Drake pieces number around 35, most needing restoration, with
several Johnson and Central Electronics boxes in the mix. The peak
of this menagerie is the TR7B (my nomenclature for the TR8 proof of
concept radio), a TR8 (perhaps one of several) and the only L85
amplifier. I plan to get these working but am severely hampered
with a zero count of any documentation. I have the radios, they
appear complete, but have no paperwork. The radios that I restore
are then "loaned " to new hams to get them started. None of these
have ever come back, but they have served to launch several hams.
And so, it will continue.
So, thank you for your patience but I had hoped that with my love of
teaching, the experience of restoring old radios and the willingness
to share that experience would have been rewarded with a more open
and friendly atmosphere. Simply put, I have been there and for the
most part done that. If what I have to say does not fit the formula
and the wording that is acceptable to those with the questions, then
my teaching skills have withered. Again, Sorry. But I will
continue to monitor, but will likely limit my participation in these
realms.
Thank you again for your kind comments and for your patience. I
feel better already.
David Assaf III
W5XU, VP8RXU
On Sat, Jan 6, 2024 at 2:21?PM Michael Smith via groups.io [3]
<tw8kcabpilot@...> wrote:
David,
Consider everyone’s response, so not to be offended —_ no one_
ignored you; it may seem that way, though. We all learn from all
the posts, no matter how much experience we have or training, etc.
My estimate, one way or another, most on this group are very
knowledgeable, but keep in mind that no one is perfect, and
sometimes circumstances get in the way of complete communication.
Expressions to the nth degree (as n goes to infinity) that Steve
mentioned sums to form a well-bounded series: in other words, the
composite is a well defined meaningful answer. I am planning on
starting restoration/repair or restart of some Drake tube radios I
have, and have been contemplating just how to go about this. The
composite of this topic posting, including your comments, have
helped me to conclude on a process or plan to bring up radios that
have sitting dormant a long time. So, the only part about your
message that is erroneous from my perspective is as follows: your
experience appears to be high, your knowledge is significant, and
for the “baloney” quotient, as the baloney increases in the
denominator without bound (goes to infinity) in the limit, the
quotient goes to zero.
Secondary, many of us have been in this situation, saying “I’ve
tried everything. What is wrong?” My entire day working as a
medical-imaging systems field engineer for many years as a young man
was spent with, “What is wrong?” Sometimes the problem was
baffling, sometimes just irritating. I say this because it is
refreshing for me to get a good chuckle (as intended) from
introductory comments like Steve’s, amidst dealing with a
frustrating problem. As I have a good laugh at the comment, because
I’ve been there, my pride factor diminishes greatly — a good
thing.
Accept my suggestion, and of others, to keep reading and
contributing when you can.
Peace,
73, Michael, N4KZO

Links:
------
[1]
[2]
[3]
[4] /g/DRAKE-RADIO/message/75495
[5] /mt/103544827/243852
[6] /g/DRAKE-RADIO/post
[7] /g/DRAKE-RADIO/editsub/243852
[8] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy

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Retired American Airlines captain, retired ANG (I was only a major, I had some enlisted time in the late 70’s). ?Worked as a physicist/project engineer at Hughes Aircraft Co in the Space and Comm division. ?Now I tinker with boat anchors and some hybrids. ?Airplanes, boats and yes, I have both the tube powered and the inline 6 powered TR-6’s! ?

My Elmer, an SK long ago, sold me his SP-600 receiver to pay for his new 1970’s Yeasu. ?I got it at a steep discount, but I had to promise to keep it running. ?I still have it, it still runs, had to get rid of all the Sprague capacitors, etc! ?Hence my fascination with all things that glow in the dark.

Bob ?Coffman, KJ7AJ

2drestoration@...

On Jan 11, 2024, at 5:34 PM, Steve Wedge, W1ES/4 via <w1es@...> wrote:

David, are you Acadian?

Steve Wedge, W1ES/4

Time flies like an arrow.? Fruit flies like a banana.

Sent with secure email.

On Thursday, January 11th, 2024 at 4:58 PM, Bob Coffman via <2drestoration@...> wrote:

David, Fascinating personal history! ?I flew F-4’s and F-15’s in the Louisiana Air National Guard (NAS New Orleans) from 1980-1996, BS Physics, minored in math and geology, University of Denver. ?Novice license was WN7VTF in 1970-ish, I was 12. ?Dad’s old regenerative receiver and matching 2 tube x-tal transmitter was about all I could afford in grade school/jr high!

Bob ?Coffman, KJ7AJ

2drestoration@...

On Jan 11, 2024, at 12:23 PM, David <david.w5xu@...> wrote:

Michael Smith:

I wish to thank you for your well crafted response.? I am sorry to you and to all if I overreacted.? I was in the Mechanical?and electrical?consultant?field for 45 years and it is hard for me to see blatant opposition for logic and order.? I apologize?to you and to the like minded others.

Some background may help?to soften?the automatic critical answers?I get:

I started dabbling with radios before I was a ham.? I think it started when one of the family radios went out.? I was a freshman?in high school then.? My summer jobs varied, but with the newfound interest, I directed it toward radio.? My very first job was to deliver the New Orleans Item afternoon newspaper.? I was 9 years old.? The summers were spent with this.? My first year of college (1964) I was astounded?at the cost of the education.? It was at Loyola Univ in New Orleans and it was $770 a semester!

I had worked at?a radio and tv repair shop for two summers.? Used this to augment the radio repair hobby.? After high school I went to work (again, summer time vacation fill in work) at WDSU TV in New Orleans.? I did that for three years.

?

Cutting those years short:? I graduated in 1967 with a degree in Physics and minors in Math and Chemistry.? It was at Loyola that in a search for a quiet place to study, I found W5LJY, the?Loyola HAm Radio Station.? It was there that members?of the club got me interested in Ham Radio.? I was licensed in Dec 1964.??

After Loyola and after a few divergent course?maneuvers, I started LSU in Baton Rouge for graduate school in Electrical engineering.? The summer after my first?year I was drafted.? The Army recruiter?told me that I wouldn't be?going to Vietnam as I would likely think before I pulled the trigger (a quote) and they wanted someone who would just pull the trigger, so I ended up in the air force?fixing radios and radar in fighter aircraft.

In 1969, I married and moved to Baton Rouge to continue my education.? Since I was then married, I got a job at WAFB TV in Baton Rouge essentially in the same role as before.? Except this one was how I financed my family.? With work and with National Guard Service, I finally graduated from LSU with a Masters?in Electrical?Engineering.? My growing family, work and a career?start in the Consulting Engineering field kept me busy.? A typical day while still in school:? First was a class either at LSU or Southern where I taught either Lab work at LSU or at Southern, teaching communications using my experience in the TV industry.? Then I attended classes/ studied and at 5 PM or so, when the late night shift started at the TV station, I went there and worked till sign off.? Home, rest and repeat.

When I got the fortunate opportunity to enter into the Consulting field (I designed HVAC, lighting, plumbing, fire protection and alarm?systems for buildings:? my work was from coast to coast, from Aruba to Canada).? THis job allowed me to give up the?work of teaching and TV work.? While I tried to continue with a PhD program, I could not find?a University that would?hire me for teaching while working toward a degree, so I was most fortunate to be given an opportunity to change paths.

All of this meant I had to give up HAm Radio for a while and I was off the air for 19 years.? When I was more or less settled?(in Baton Rouge), I erected a small 40 ft. tower, a tribander and pulled out my original radios, a Drake R4B, Heathkit SB400 and a homebrew linear using a pair of 4-400 tubes.? I was on the air.

I attended a Dayton hamvention in the mid 1990's for the specific?reason to find a Sherwood modified R4C and T4XC.? At the convention I found 2 of them, bought one and then (in those days) hand carried both boxes on board the airplane and brought them home.? I completely restored both boxes and for the next WWDX?CW contest, put them on the air, barefoot with the tribander.? That weekend I worked DXCC (all CW) and took advantage of the wonderful band conditions.

To shorten further, this rewarding restoring experience caused me to start a collection of various ham stuff, mostly Drake.? Now the Drake pieces number around 35, most needing restoration, with several Johnson and Central Electronics boxes in the mix.? The peak of this menagerie?is the TR7B (my nomenclature?for the TR8 proof of concept radio), a TR8 (perhaps one of several) and the only L85 amplifier.? I plan to get these working but am severely?hampered with a zero count of any documentation.? I have the radios, they appear complete, but have no paperwork.? The radios that I restore are then "loaned " to new hams to get them started.? None of these have ever come back, but they have served to launch several hams.? And so, it will continue.

So, thank you for your patience but I had hoped that with my love of teaching, the experience?of restoring old radios and the willingness to share that experience would have been rewarded with a more open and friendly atmosphere.? Simply put, I have been there and for the most part done that.? If what I have to say does not fit the formula and the wording that is acceptable to those with the questions, then my teaching?skills have withered.? Again, Sorry.? But I will continue to monitor, but will likely?limit my participation in these realms.

Thank?you again for your kind?comments and for your patience.? I feel better already.

David Assaf III

W5XU, VP8RXU

?

On Sat, Jan 6, 2024 at 2:21?PM Michael Smith via??<tw8kcabpilot=[email protected]> wrote:

David,
Consider everyone’s response, so not to be offended —?no one?ignored you; it may seem that way, though. ? We all learn from all the posts, no matter how much experience we have or training, etc.? My estimate, one way or another, most on this group are very knowledgeable, but keep in mind that no one is perfect, and sometimes circumstances get in the way of complete communication.? Expressions to the nth degree (as n goes to infinity) that Steve mentioned sums to form a well-bounded series: in other words, the composite is a well defined meaningful answer.? I am planning on starting restoration/repair or restart of some Drake tube radios I have, and have been contemplating just how to go about this.? The composite of this topic posting, including your comments, have helped me to conclude on a process or plan to bring up radios that have sitting dormant a long time.? So, the only part about your message that is erroneous from my perspective is as follows: your experience appears to be high, your knowledge is significant, and for the “baloney” quotient, as the baloney increases in the denominator without bound (goes to infinity) in the limit, the quotient goes to zero.

Secondary, many of us have been in this situation, saying “I’ve tried everything.? What is wrong?” ?My entire day working as a medical-imaging systems field engineer for many years as a young man was spent with, “What is wrong?” ?Sometimes the problem was baffling, sometimes just irritating.? I say this because it is refreshing for me to get a good chuckle (as intended) from introductory comments like Steve’s, amidst dealing with a frustrating problem.? As I have a good laugh at the comment, because I’ve been there, my pride factor diminishes greatly — a good thing.

Accept my suggestion, and of others, to keep reading and contributing when you can.

Peace,

73, Michael, N4KZO

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Richard your AM Analysis was very good.
I would add AM distortion is in the ears of the
beholder.
Many

On Wed, Jan 10, 2024 at 4:32?PM Richard Knoppow <1oldlens1@...>
wrote:

It is surprising to me (shouldn't be) how much confusion there is
about AM. For one thing the term "distortion" means different things to
different people. In almost prehistoric times, like the 1930s,
distortion could mean any difference between the original signal and
what comes out of the receiver, this included frequency response
distortion. I think that is what was meant in the recent thread.
However, more frequently "distortion" means a change in the waveform
shape due to harmonics or intermodulation. The effect of a narrow
bandpass on AM is to affect the frequency response. Simply, for a given
signal bandwidth AM requires twice the bandwidth of SSB. By tuning to
one side its possible to extend the bandwidth, however, the carrier is
affected by the shape of the filter. If the filter does not have a flat
pass band the carrier will be reduced resulting in harmonic and IM
distortion. The effect is similar to overmodulation. So, how much
bandwidth does one need? For intelligible speech probably at least six
Khz and for music considerably more.
Now, there are other sources of distortion, for instance
intermodulation of the higher frequencies by the low frequencies due to
to the AVC modulating the signal. If the AVC speed is high this will
happen. You can hear the difference by turning off the AVC. There are
other sources. Getting clean AM demodulation is not trivial.
Anyway, one must be careful of terms to make sure everyone
understands what one is talking about.

On 1/10/2024 1:01 PM, Rick W4XA wrote:

Rob, don't put too much effort measuring the sensitivity of your TR-4C
and R-4C .

If you hear an obvious increase in the noise level when connecting the
antenna to the TR-4C in the AM position, while it may not be as
sensitive as the R-4C, it will still be "enough"!

Cheers!

Rick

//

On Wed, Jan 10, 2024 at 12:33 PM, Rob PA9Z wrote:

Thanks folks,

Indeed, the TR-4C doesn't seem to be the ideal rig for AM. Luckily I
also have the 4C twins, and the R-4C does AM very well. I could
accept the 'distortion' caused by squeezing AM through the SSB
filter, but I also have the impression that the sensitivity of the
TR-4C receiver in AM is significantly less then SSB. I will compare
that with the R-4C. Meanwhile I think I need to accept the limited
AM functionality of the TR-4C.

'73 de Rob PA9Z



--


/*73/Rick*/

//*W4XA
**///Every post is created using Linux *
*/

--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998