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Mores code

 

开云体育

Did you know this is officially, Mores Code day?


Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.


Re: The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

Thanks Kevin.? You may be correct since that receiver was made up until 1969.? How does the tuning feel on that receiver?? Do you get some sustained spin movement with a flick of the wrist?

73
Don N9OO

On 4/27/25 12:33 AM, Kevin W9CF via groups.io wrote:

The sx-146 has flywheel tuning. It might not be the last, but must be close.?
?
73 Kevin w9cf
Re: The First and Last Hallicrafters with Flywheel tuning?

 

The sx-146 has flywheel tuning. It might not be the last, but must be close.?
?
73 Kevin w9cf
Re: The First and Last Hallicrafters with Flywheel tuning?

 
Edited

That sure is a nice looking SX42! Thanks for the pic!

John K5MO


On Sat, Apr 26, 2025 at 9:49?AM Arthur Smith via <arthurredsox=[email protected]> wrote:
Not the first, or the last, but my SX-42 sure has it.?



On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:

? Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO

Re: The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

Richard, it seems to me for older receivers, while tuning across a ham band the weight is not helpful, but when tuning from end to end or the whole dial, it is helpful. So what weight is the best ? zero or 100 ?

PS? is “direct drive” always DIRECT on the cap rotor shaft, or is it geared usually?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Richard Knoppow via groups.io
Sent: Saturday, April 26, 2025 4:09 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] The First and Last Hallicrafters with Flywheel tuning?

?

My S-20r and S-40A? have flywheels on the band spread. It's possible that some receivers have flywheels on the main tuning but I can't think of any hallicrafters that? do. Also, flywheels are found on some direct drive dials, not just strring drive.?

? An interesting? i think flywheels were more more sales gimmicks than practical? devices.

?

ters that do.

?

?

-------- Original message --------

From: "John Watkins via groups.io" <jpwatkins9@...>

Date: 4/26/25 9:28 AM (GMT-08:00)

Subject: Re: [HallicraftersRadios] The First and Last Hallicrafters with Flywheel tuning?

?

My S 20R has one also, made in 1942, was at Camp Pendelton at the NCO club.

?

On Sat, Apr 26, 2025 at 08:49 Arthur Smith via <arthurredsox=[email protected]> wrote:

Not the first, or the last, but my SX-42 sure has it.?

………pic removed….

On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:

? Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO

_._,_._,_

_,_


--
don??? va3drl
Re: The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

Good afternoon
The SX-96 has a flywheel also
Bruce

On Apr 26, 2025, at 2:08 PM, Richard Knoppow via <1oldlens1@...> wrote:

My S-20r and S-40A? have flywheels on the band spread. It's possible that some receivers have flywheels on the main tuning but I can't think of any hallicrafters that? do. Also, flywheels are found on some direct drive dials, not just strring drive.?
? An interesting? i think flywheels were more more sales gimmicks than practical? devices.

ters that do.


-------- Original message --------
From: "John Watkins via " <jpwatkins9@...>
Date: 4/26/25 9:28 AM (GMT-08:00)
Subject: Re: [HallicraftersRadios] The First and Last Hallicrafters with Flywheel tuning?

My S 20R has one also, made in 1942, was at Camp Pendelton at the NCO club.

On Sat, Apr 26, 2025 at 08:49 Arthur Smith via <arthurredsox=[email protected]> wrote:
Not the first, or the last, but my SX-42 sure has it.?

<image0.jpeg>

On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:

? Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO



Re: The First and Last Hallicrafters with Flywheel tuning?

 

Humphrey Bogart as an exec with an SX 42 in his office. Movie title Sabrina co-starring Audrey Hepburn.?



On Sat, Apr 26, 2025 at 5:37?AM Don Buska - The Radio Lab Works via <don=[email protected]> wrote:

Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO


--
AF6IM
www.parachutemobile.com
Re: The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

My S-20r and S-40A? have flywheels on the band spread. It's possible that some receivers have flywheels on the main tuning but I can't think of any hallicrafters that? do. Also, flywheels are found on some direct drive dials, not just strring drive.?
? An interesting? i think flywheels were more more sales gimmicks than practical? devices.

ters that do.


-------- Original message --------
From: "John Watkins via groups.io" <jpwatkins9@...>
Date: 4/26/25 9:28 AM (GMT-08:00)
Subject: Re: [HallicraftersRadios] The First and Last Hallicrafters with Flywheel tuning?

My S 20R has one also, made in 1942, was at Camp Pendelton at the NCO club.

On Sat, Apr 26, 2025 at 08:49 Arthur Smith via <arthurredsox=[email protected]> wrote:
Not the first, or the last, but my SX-42 sure has it.?

image0.jpeg

On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:

? Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO

Re: The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

Good point Ed, thanks.

73 Don N9OO

On 4/26/25 11:22, edward schumacher wrote:

Also consider the SR series were billed as mobile rigs and you would not want a weighted free wheeling tuning in that application.

Ed, WA9GQK

On Saturday, April 26, 2025 at 09:41:46 AM CDT, Don Buska - The Radio Lab Works <don@...> wrote:


Thanks Paul,? I was wondering about the last of the SR-line.? So I guess once Hallicrafters went to the 'lighter' rig trend in the 1960's, no more Battle Ships, the flywheel was probably cast away.? I assume they went to clutch friction driving of the Kc, 100Kc and VFO capacitor on the SR-400A.? I've been working on the restoration of my SR-150 this past month and was kind of disappointed in the smoothness of slow tuning of the VFO, due to the friction clutch drive.? It tunes smoothly at the fast rate, but when your slowly working your way up or down you can feel the extra drag.? And I have cleaned the friction plates and drive disks.? I also lubed the brass bushing and VFO cap bearing as well.? Outside of completely removing the front panel and disassembling everything, I'm not to sure how good it can get.?? I'll need to test drive a few SR-400's and their lessor brothers to get a better feel I guess.

Thanks es 73
Don N9OO

On 4/26/25 9:01 AM, Paul Christensen via groups.io wrote:
Weighted flywheel tuning on my SX-25 and S-40a main tuning but not bandspread. ?SX-100 has weighted flywheel tuning on both main and bandspread. ?

No weighted tuning on my SR-400A, nor the matching VFO.?

Paul, W9AC.?
Re: The First and Last Hallicrafters with Flywheel tuning?

 
Edited

My S 20R has one also, made in 1942, was at Camp Pendelton at the NCO club.

On Sat, Apr 26, 2025 at 08:49 Arthur Smith via <arthurredsox=[email protected]> wrote:
Not the first, or the last, but my SX-42 sure has it.?



On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:

? Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO

Re: The First and Last Hallicrafters with Flywheel tuning?

 

Also consider the SR series were billed as mobile rigs and you would not want a weighted free wheeling tuning in that application.

Ed, WA9GQK

On Saturday, April 26, 2025 at 09:41:46 AM CDT, Don Buska - The Radio Lab Works <don@...> wrote:


Thanks Paul,? I was wondering about the last of the SR-line.? So I guess once Hallicrafters went to the 'lighter' rig trend in the 1960's, no more Battle Ships, the flywheel was probably cast away.? I assume they went to clutch friction driving of the Kc, 100Kc and VFO capacitor on the SR-400A.? I've been working on the restoration of my SR-150 this past month and was kind of disappointed in the smoothness of slow tuning of the VFO, due to the friction clutch drive.? It tunes smoothly at the fast rate, but when your slowly working your way up or down you can feel the extra drag.? And I have cleaned the friction plates and drive disks.? I also lubed the brass bushing and VFO cap bearing as well.? Outside of completely removing the front panel and disassembling everything, I'm not to sure how good it can get.?? I'll need to test drive a few SR-400's and their lessor brothers to get a better feel I guess.

Thanks es 73
Don N9OO

On 4/26/25 9:01 AM, Paul Christensen via groups.io wrote:
Weighted flywheel tuning on my SX-25 and S-40a main tuning but not bandspread. ?SX-100 has weighted flywheel tuning on both main and bandspread. ?

No weighted tuning on my SR-400A, nor the matching VFO.?

Paul, W9AC.?
Re: The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

The SR series did not use cord drive. It is direct drive. The ht-44 and the SX-117 and others were also direct drive.


Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.


From: [email protected] <[email protected]> on behalf of Don Buska - The Radio Lab Works <don@...>
Sent: Saturday, April 26, 2025 9:41 AM
To: [email protected] <[email protected]>
Subject: Re: [HallicraftersRadios] The First and Last Hallicrafters with Flywheel tuning?
?
Thanks Paul,? I was wondering about the last of the SR-line.? So I guess once Hallicrafters went to the 'lighter' rig trend in the 1960's, no more Battle Ships, the flywheel was probably cast away.? I assume they went to clutch friction driving of the Kc, 100Kc and VFO capacitor on the SR-400A.? I've been working on the restoration of my SR-150 this past month and was kind of disappointed in the smoothness of slow tuning of the VFO, due to the friction clutch drive.? It tunes smoothly at the fast rate, but when your slowly working your way up or down you can feel the extra drag.? And I have cleaned the friction plates and drive disks.? I also lubed the brass bushing and VFO cap bearing as well.? Outside of completely removing the front panel and disassembling everything, I'm not to sure how good it can get.?? I'll need to test drive a few SR-400's and their lessor brothers to get a better feel I guess.

Thanks es 73
Don N9OO

On 4/26/25 9:01 AM, Paul Christensen via groups.io wrote:
Weighted flywheel tuning on my SX-25 and S-40a main tuning but not bandspread. ?SX-100 has weighted flywheel tuning on both main and bandspread. ?

No weighted tuning on my SR-400A, nor the matching VFO.?

Paul, W9AC.?
Re: The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

Thanks Paul,? I was wondering about the last of the SR-line.? So I guess once Hallicrafters went to the 'lighter' rig trend in the 1960's, no more Battle Ships, the flywheel was probably cast away.? I assume they went to clutch friction driving of the Kc, 100Kc and VFO capacitor on the SR-400A.? I've been working on the restoration of my SR-150 this past month and was kind of disappointed in the smoothness of slow tuning of the VFO, due to the friction clutch drive.? It tunes smoothly at the fast rate, but when your slowly working your way up or down you can feel the extra drag.? And I have cleaned the friction plates and drive disks.? I also lubed the brass bushing and VFO cap bearing as well.? Outside of completely removing the front panel and disassembling everything, I'm not to sure how good it can get.?? I'll need to test drive a few SR-400's and their lessor brothers to get a better feel I guess.

Thanks es 73
Don N9OO

On 4/26/25 9:01 AM, Paul Christensen via groups.io wrote:

Weighted flywheel tuning on my SX-25 and S-40a main tuning but not bandspread. ?SX-100 has weighted flywheel tuning on both main and bandspread. ?

No weighted tuning on my SR-400A, nor the matching VFO.?

Paul, W9AC.?
Re: The First and Last Hallicrafters with Flywheel tuning?

 
Edited

开云体育

Weighted flywheel tuning on my SX-25 and S-40a main tuning but not bandspread. ?SX-100 has weighted flywheel tuning on both main and bandspread. ?

No weighted tuning on my SR-400A, nor the matching VFO.?

Paul, W9AC.?

Sent from ?for iOS

From: [email protected] <[email protected]> on behalf of Arthur Smith via groups.io <arthurredsox@...>
Sent: Saturday, April 26, 2025 8:49:33 AM
To: [email protected] <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: [HallicraftersRadios] The First and Last Hallicrafters with Flywheel tuning?
?
Not the first, or the last, but my SX-42 sure has it.?



On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:

? Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO
Re: The First and Last Hallicrafters with Flywheel tuning?

 
Edited

开云体育

Not the first, or the last, but my SX-42 sure has it.?



On Apr 26, 2025, at 8:37?AM, Don Buska - The Radio Lab Works <don@...> wrote:

? Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO

The First and Last Hallicrafters with Flywheel tuning?

 

开云体育

Here's a question that is of general interest to me.? What was the first and last Hallicrafters radio (Receiver or Transceiver) that had a flywheel incorporated into the main frequency tuning?? I do recall in High school our SX-28 indeed had it.? My SX-115 has it (matching HT-32B too).? Did any of the SR series transceivers or later SX-receivers have a flywheel hidden inside?

73
Don N9OO

Re: For Sale - Hallicrafters R-274/FRR with speaker

 

Hi Dwight,
I may be leaving for New Mexico as early as Friday so should be there all next week. I need contact information or an address for the R-274 pickup. I may be able to make the pickup on the way over or arrange to drive up from Pie Town during the week (which gives you a bit more flexibility on timing).
Thanks,
Tom N5AMA?
Re: For Sale - Hallicrafters R-274/FRR with speaker

 

Hi Dwight,
Thanks for the wake up call. As recently as today, Pie Town still had snow/sleet in the forecast. Normally the snow melts off or evaporates in a day or two. There is nothing but dirt roads going to the observatory it makes driving in or out once you get there very difficult if you don’t have 4 wheel drive. Temps aren’t bad but I don’t make the trip if it’s wet and slippery. I’ll have to wait and let the weather settle a bit.
?
Tom
N5AMA
Re: WTB/Info SX-23 S meter

 

开云体育

Hope the picture of the s-meter helps?

?

I'm having a problem with mine too. Unfortunately,

I'm missing the entire range indicator (right side of the main scale), drive pulley, and pointer, along with the complete mounting unit.

?

Von: [email protected] <[email protected]> Im Auftrag von don Root
Gesendet: Freitag, 18. April 2025 21:49
An: [email protected]
Betreff: Re: [HallicraftersRadios] WTB/Info SX-23 S meter

?

Nick, well maybe you can ask some SX-23 owner to take some pictures for you. Other than that, any reasonable meter is better than none at least for now .

If you go to swaps, with a picture you might have a lucky day while going thru odds and sods .. “one man’s junk…”

Good ludk

From: [email protected] [mailto:[email protected]] On Behalf Of Nick, W1NJC via groups.io
Sent: Friday, April 18, 2025 12:33 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] WTB/Info SX-23 S meter

?

Don,

The original is completely absent.? All I have are some pictures that I found online and one from a guy at ARF.?

?

I did verify that the meter drive circuit works by wiring up the meter from a Johnson Matchbox.? I adjusted no signal = full scale and as I tune a strong signal, the needle moves to the left...

?

I'm also chasing down a distortion issue with (I think) the 6SQ7 detector circuit, so the radio is open and on its side again :)


--
don??? va3drl

20250419_085314.jpg
Sx-23_1.jpg

Re: For Sale - Hallicrafters R-274/FRR with speaker

 

Hello Tom, Just checking in to see if you still plan on taking a trip to the observatory.?
?
?
Dwight
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