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Re: The First and Last Hallicrafters with Flywheel tuning?
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:
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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 |
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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 ? 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 :)
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Re: Hallicrafters S40-B Restoration Advice
Richard This 115 volt line voltage, back in the day, is a myth.? Just look at Riders Perpetual Troubleshooter Manual, Volume 1 circa 1931. See:???? This is mostly battery sets but it does include early Philco and RCA line powered sets as well.? The voltage range given for the early AC sets is 105 to 125 VAC.? The average of 105 and 125 is, of course, 115.? Resistors, capacitors and such have a tolerance, why not line voltage??? If the tube heaters are operating at 6.3 volts +/- 10% then all is well.? Pentodes don't care about a 10% increase in B+.? That is why the plate current curves are flat lines, plate voltage has little effect on plate current. Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Friday, April 18, 2025 at 04:38:00 PM CDT, Richard AG5M via groups.io <ag5m@...> wrote:
I had fun this morning. I started up my 1952 Hallicrafters S-40B receiver today, very carefully. I first cleaned the controls, then plugged in the receiver with my Variac and Dim-Bulb-Tester in line. Slowly brought the voltage up listening for hum, watching for smoke. There was a very slight 60 Hz hum at the beginning but that went away. It's working on 80 volts right now. I thought it best not to bring it up to 110 VAC, the standard household voltage that was common in the 1950s. Here at the house I have 122 VAC. I left it running for over an hour, nothing bad happened. So given that, I'll go ahead and replace all the capacitors (ordered Harbach) check for out of tolerance resistors, etc. Clean it up. It's really dirty, which is actually a good thing, tells you no one was inside messing around. It looks to all original. I'll bet this is the first time it has run in decades. Just goes to show you they built (made in the USA) really good stuff back then, built for the long haul, repairable, to last many generations. 73, Richard AG5M On Sunday, April 6, 2025 at 03:04:45 PM PDT, Richard AG5M via groups.io <ag5m@...> wrote: Hello all, this being my first post here.? I recently acquired a Hallicrafters S40-B receiver from a dear friend who went SK.? I had promised to restore it for him, so even though he is gone, I'll keep my promise.? From the looks of it it's all original with no one ever having been inside it, unused for unknown amount of time.? Manufactured Nov. 17, 1952.? Even had the original manual in it.? So what you see is 1952 dirt and a lot of old paper caps, etc.? I'm an old timer, licensed in 1963, so tube rigs are not new to me.? I have not plugged it in yet, and yes, I know all about Dim-Bulb-Testers, Variacs, etc.? I have analog and digital meters, AF and RF generators, O'Scope, tube testers, etc.? Just looking for some up front advice from anyone who has been down this path before with this or similar Hallicrafters receivers, what to watch out for, anything special to think about?? Thank you, 73, Richard AG5M |
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Re: Hallicrafters S40-B Restoration Advice
I only was listening to local AM radio on the bench, chunk of wire connected to antenna terminal. It sounds really nice. Band switch is a bit stiff, will work on that. All controls and switches silent, no scratchy stuff. Mine too has all the original stickers still on it. And the inrush limiter is a good idea. Next up, before I complete this project, is my Collins 516F-2 power supply. Then I'll get back to this. 73, Richard AG5M On Friday, April 18, 2025 at 02:53:41 PM PDT, don Root <drootofallevil@...> wrote: Very good Richard, but what all did you manage to receive, and how did it sound??? Good luck ? From: [email protected] [mailto:[email protected]] On Behalf Of Richard AG5M via groups.io
Sent: Friday, April 18, 2025 5:38 PM To: [email protected] Subject: Re: [HallicraftersRadios] Hallicrafters S40-B Restoration Advice ? I had fun this morning. I started up my 1952 Hallicrafters S-40B receiver today, very carefully. I first cleaned the controls, then plugged in the receiver with my Variac and Dim-Bulb-Tester in line. Slowly brought the voltage up listening for hum, watching for smoke. There was a very slight 60 Hz hum at the beginning but that went away. On Sunday, April 6, 2025 at 03:04:45 PM PDT, Richard AG5M via groups.io <ag5m@...> wrote: ? ? Hello all, this being my first post here.? I recently acquired a Hallicrafters S40-B receiver from a dear friend who went SK.? I had promised to restore it for him, so even though he is gone, I'll keep my promise.? From the looks of it it's all original with no one ever having been inside it, unused for unknown amount of time.? Manufactured Nov. 17, 1952.? Even had the original manual in it.? So what you see is 1952 dirt and a lot of old paper caps, etc.? I'm an old timer, licensed in 1963, so tube rigs are not new to me.? I have not plugged it in yet, and yes, I know all about Dim-Bulb-Testers, Variacs, etc.? I have analog and digital meters, AF and RF generators, O'Scope, tube testers, etc.? Just looking for some up front advice from anyone who has been down this path before with this or similar Hallicrafters receivers, what to watch out for, anything special to think about?? Thank you, 73, Richard AG5M
-- don??? va3drl |
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Re: Hallicrafters S40-B Restoration Advice
开云体育Very good Richard, but what all did you manage to receive, and how did it sound??? Good luck ? From: [email protected] [mailto:[email protected]] On Behalf Of Richard AG5M via groups.io
Sent: Friday, April 18, 2025 5:38 PM To: [email protected] Subject: Re: [HallicraftersRadios] Hallicrafters S40-B Restoration Advice ? I had fun this morning. I started up my 1952 Hallicrafters S-40B receiver today, very carefully. I first cleaned the controls, then plugged in the receiver with my Variac and Dim-Bulb-Tester in line. Slowly brought the voltage up listening for hum, watching for smoke. There was a very slight 60 Hz hum at the beginning but that went away. On Sunday, April 6, 2025 at 03:04:45 PM PDT, Richard AG5M via groups.io <ag5m@...> wrote: ? ? Hello all, this being my first post here.? I recently acquired a Hallicrafters S40-B receiver from a dear friend who went SK.? I had promised to restore it for him, so even though he is gone, I'll keep my promise.? From the looks of it it's all original with no one ever having been inside it, unused for unknown amount of time.? Manufactured Nov. 17, 1952.? Even had the original manual in it.? So what you see is 1952 dirt and a lot of old paper caps, etc.? I'm an old timer, licensed in 1963, so tube rigs are not new to me.? I have not plugged it in yet, and yes, I know all about Dim-Bulb-Testers, Variacs, etc.? I have analog and digital meters, AF and RF generators, O'Scope, tube testers, etc.? Just looking for some up front advice from anyone who has been down this path before with this or similar Hallicrafters receivers, what to watch out for, anything special to think about?? Thank you, 73, Richard AG5M
-- don??? va3drl |
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Re: Hallicrafters S40-B Restoration Advice
I had fun this morning. I started up my 1952 Hallicrafters S-40B receiver today, very carefully. I first cleaned the controls, then plugged in the receiver with my Variac and Dim-Bulb-Tester in line. Slowly brought the voltage up listening for hum, watching for smoke. There was a very slight 60 Hz hum at the beginning but that went away. It's working on 80 volts right now. I thought it best not to bring it up to 110 VAC, the standard household voltage that was common in the 1950s. Here at the house I have 122 VAC. I left it running for over an hour, nothing bad happened. So given that, I'll go ahead and replace all the capacitors (ordered Harbach) check for out of tolerance resistors, etc. Clean it up. It's really dirty, which is actually a good thing, tells you no one was inside messing around. It looks to all original. I'll bet this is the first time it has run in decades. Just goes to show you they built (made in the USA) really good stuff back then, built for the long haul, repairable, to last many generations. 73, Richard AG5M On Sunday, April 6, 2025 at 03:04:45 PM PDT, Richard AG5M via groups.io <ag5m@...> wrote: Hello all, this being my first post here.? I recently acquired a Hallicrafters S40-B receiver from a dear friend who went SK.? I had promised to restore it for him, so even though he is gone, I'll keep my promise.? From the looks of it it's all original with no one ever having been inside it, unused for unknown amount of time.? Manufactured Nov. 17, 1952.? Even had the original manual in it.? So what you see is 1952 dirt and a lot of old paper caps, etc.? I'm an old timer, licensed in 1963, so tube rigs are not new to me.? I have not plugged it in yet, and yes, I know all about Dim-Bulb-Testers, Variacs, etc.? I have analog and digital meters, AF and RF generators, O'Scope, tube testers, etc.? Just looking for some up front advice from anyone who has been down this path before with this or similar Hallicrafters receivers, what to watch out for, anything special to think about?? Thank you, 73, Richard AG5M |
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Re: WTB/Info SX-23 S meter
开云体育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 |
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Re: WTB/Info SX-23 S meter
开云体育Nick, do you have any of the original meter ,or is it all gone? Other Hallicrafters meters of that vintage might be the best bet, but ?I know little[nothing] about the differences. Good luck, hope you manage to find something to make her smile! ? From: [email protected] [mailto:[email protected]] On Behalf Of Nick, W1NJC via groups.io
Sent: Thursday, April 17, 2025 3:53 PM To: [email protected] Subject: Re: [HallicraftersRadios] WTB/Info SX-23 S meter ? Thanks, guys.? Anyone know where to find one of these backward meters?? I've seen some posts around where people claim you can adjust a regular "left zero" meter to become a "right zero" using the internal or backside adjust.? Maybe better to start with a "center-zero" meter since it's only half the distance to the goal. ? I thought about the upside-down method, and it may work.? The angle of the needle will be wrong though. _._,_._,_ -- don??? va3drl |
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Re: WTB/Info SX-23 S meter
开云体育
With no power it should?be to the far right. After power up it should slowly move to the left.?
Walt Cates, WD0GOF
?
From: [email protected] <[email protected]> on behalf of Nick, W1NJC via groups.io <njc@...>
Sent: Thursday, April 17, 2025 11:24 AM To: [email protected] <[email protected]> Subject: [HallicraftersRadios] WTB/Info SX-23 S meter ?
This is a long shot, but I need the S meter for the SX-23 I've restored.? It looks like
maybe a fairly standard round meter could be made to work.? It's a 1mA full scale type, however I've discovered that the original seems to have mechanical zero on the right instead of the left.? That is, the maximum current through the meter is when
the RF signal is at minimum.? As the RF signal increases, the meter current goes
down.
?
Does anyone have any info on this meter, or better, have one laying around?? Barring that, how about any ideas on how I could get some kind of meter into this radio which looks decent and is functional?
?
Thanks,
Nick W1NJC
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Paul Christensen
Don Buska - The Radio Lab Works
Jim Whartenby
Richard AG5M
don Root
Bill (Group Owner)
Rick W7IMM
waltcates