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Re: WTB/Info SX-23 S meter

 

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With no power it should?be to the far right. After power up it should slowly move to the left.?


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


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
Re: WTB/Info SX-23 S meter

 

Mount the replacement meter upside down?
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy


On Thursday, April 17, 2025 at 11:25:01 AM CDT, Nick, W1NJC via groups.io <njc@...> wrote:


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
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
Wanted Halli Spinner Knob

 

I'd like to buy a Halli main tuning spinner knob like those used on the SR150, 400, HT-44, SX-117.? I want to use it on my SR-500.? Thanks.? 73, Scott WA9WFA
Re: BRAIN BELCH

 

That's great, Walt. I have encountered a couple of? noisy sockets in this SR-150 but have yet to get such good results.

Did the voltage checks around the Driver and Finals finding that with 120VAC from my line the supply voltages are all running higher than what's given in the chart. 270 instead of 250 for example. The HI B+ is 657 no load, 625 in MOX and 600 under key down. With 140 ma indicated that translates to around 84 watts. Still below spec I believe.

Don't currently have a scope that I am used to working with right now. My old ones died and have not really learned the latest replacement yet to make the measurement you suggested.

At least getting consistent responses now.

73 ... Ed



On Tuesday, April 15, 2025 at 03:07:28 PM CDT, waltcates via groups.io <cateswa@...> wrote:


You know, sometimes a fellow needs?to follow his own advice.?

I have been working on an SR-160. As of this morning I had put 12 hours into it. I was getting nowhere. I spent considerable time ensuring that all alignment was perfect. Every time I turned it on it acted differently. I don't know why, but?I started wiggling tubes. Almost every tube brought forth loud crashes from the speaker. I said to myself "Well dummy clean the tube sockets and pins".?

Guess what, I now have the sweetest running SR-160. The receiver is running 22 to 26 db s+n:n. The transmitter runs 120 to 135 watts across all three bands.

Well, that was my last rig on the shelf. So now I am looking for another project. I have not had a HT-40 on my bench for 15 or 20?years. So, I am looking for a complete unit. It doesn't need to function as long as it has not been butchered inside and has a readable front panel. So anyone with one that has been on the back shelf for years and is willing to part with it contact me off forum.

?73


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


Re: BRAIN BELCH

 

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Walt ??that obvious simple test, should be near the top of everybody’s routine? test list; but get some asbestos gloves first, it is one test that can bite back. I know I don’t have to tell you that, DO I??? do you really count time. It would be depressing for me; so put the clock out the window.

Oh I just wanted to say good going again.

?

From: [email protected] [mailto:[email protected]] On Behalf Of waltcates via groups.io
Sent: Tuesday, April 15, 2025 4:07 PM
To: HALLI IO GROUP
Subject: [HallicraftersRadios] BRAIN BELCH

?

You know, sometimes a fellow needs?to follow his own advice.?

?

I have been working on an SR-160. As of this morning I had put 12 hours into it. I was getting nowhere. I spent considerable time ensuring that all alignment was perfect. Every time I turned it on it acted differently. I don't know why, but?I started wiggling tubes. Almost every tube brought forth loud crashes from the speaker. I said to myself "Well dummy clean the tube sockets and pins".?

?

Guess what, I now have the sweetest running SR-160. The receiver is running 22 to 26 db s+n:n. The transmitter runs 120 to 135 watts across all three bands.

?

Well, that was my last rig on the shelf. So now I am looking for another project. I have not had a HT-40 on my bench for 15 or 20?years. So, I am looking for a complete unit. It doesn't need to function as long as it has not been butchered inside and has a readable front panel. So anyone with one that has been on the back shelf for years and is willing to part with it contact me off forum.

?

?73

?

?

Walt Cates, WD0GOF

?

A majority of acceptance is not proof of correctness.

?

_._,_._,_


--
don??? va3drl
BRAIN BELCH

 

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You know, sometimes a fellow needs?to follow his own advice.?

I have been working on an SR-160. As of this morning I had put 12 hours into it. I was getting nowhere. I spent considerable time ensuring that all alignment was perfect. Every time I turned it on it acted differently. I don't know why, but?I started wiggling tubes. Almost every tube brought forth loud crashes from the speaker. I said to myself "Well dummy clean the tube sockets and pins".?

Guess what, I now have the sweetest running SR-160. The receiver is running 22 to 26 db s+n:n. The transmitter runs 120 to 135 watts across all three bands.

Well, that was my last rig on the shelf. So now I am looking for another project. I have not had a HT-40 on my bench for 15 or 20?years. So, I am looking for a complete unit. It doesn't need to function as long as it has not been butchered inside and has a readable front panel. So anyone with one that has been on the back shelf for years and is willing to part with it contact me off forum.

?73


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


Re: S-38B Power Consumption

 

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Ron that scheme sounds like ?as is here , but the source transformer is also grounded.

I asked about the switch location for the usual reason?? and in your case where it might see 230 volts, rather than the expected 115 as designed. who knows the switch rating? I mention that in caution, so you can plan one way or the other.

P.S. Those resistors were intended to be run on the top side of the world, they don’t work well so far below sea level.

Good luck

?

From: [email protected] [mailto:[email protected]] On Behalf Of Ron Sharp via groups.io
Sent: Saturday, April 12, 2025 9:04 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] S-38B Power Consumption

?

Don,

Australia runs 230VAC 50 Hz but typically measures around 240VAC. The arrangement you described sounds like our wiring. The system we use is called MEN or Multiple Earth Neutral system in that the cold (or neutral) line is grounded at the point of entry to the house (at the fuse/meter box) via a copper stake into the ground. The hot, neutral and ground wires are extended to all outlets. I believe the multiple earth neutral terminology comes from the fact that there are lots of points along the distribution route where the the neutral is grounded, not just at the source.

?

I intend to use a three prong plug and ground the chassis. As far as the ON/OFF goes I will probably rewire it so that it is in the primary of the transformer if I install it in the cabinet.

?

As an aside, so far, every resistor? I measured (except R20) has been way out of tolerance (high) to the point that I double checked my meter against some known values. Also, R20, the 1000 ohm 1/2W resistor in the B+ line has been replaced at some stage with a 1 Watt resistor and it is showing severe signs of burning, but still measures 1000 ohms.

?

Cheers


--
don??? va3drl
Re: S-38B Power Consumption

 

Don,
Australia runs 230VAC 50 Hz but typically measures around 240VAC. The arrangement you described sounds like our wiring. The system we use is called MEN or Multiple Earth Neutral system in that the cold (or neutral) line is grounded at the point of entry to the house (at the fuse/meter box) via a copper stake into the ground. The hot, neutral and ground wires are extended to all outlets. I believe the multiple earth neutral terminology comes from the fact that there are lots of points along the distribution route where the the neutral is grounded, not just at the source.
?
I intend to use a three prong plug and ground the chassis. As far as the ON/OFF goes I will probably rewire it so that it is in the primary of the transformer if I install it in the cabinet.
?
As an aside, so far, every resistor? I measured (except R20) has been way out of tolerance (high) to the point that I double checked my meter against some known values. Also, R20, the 1000 ohm 1/2W resistor in the B+ line has been replaced at some stage with a 1 Watt resistor and it is showing severe signs of burning, but still measures 1000 ohms.
?
Cheers
Re: Hallicrafters S-107 Very First version...Not the MK1

 

Digging in more on this S107. Finding more and more that have been done wrong. For some reason when it was recapped, the person used a .02 mfd electrolytic cap (C53..I think it is on the schematic) where a film cap should have been used. This may be the culprit of the 1k ohm resistor heating up that goes off the 6k6gt audio tube. Will be reworking the can cap and remove the mess underneath the radio. And instead of using a 680 ohm and 1.2k ohm 2 watt resistor off the 6k6, they used 2 680 ohm 2 watt resistors. I am sure this is not helping either.?
Re: S-38B Power Consumption

 

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Ron,

Do Australia houses use a hot wire, + a grounded neutral, + a safety ground [three prong plugs] so will you use a three prong ?plug.

an auto-transformer ?should be more efficient.

How do you intend to handle the ON/OFF switching?

?

From: [email protected] [mailto:[email protected]] On Behalf Of Ron Sharp via groups.io
Sent: Friday, April 11, 2025 7:02 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] S-38B Power Consumption

?

Hi folks,

Thanks for the good information on the current drain of the S-38B.

?

My intention is/was to use a Triad Magnetics TR6-120 transformer that has a 230VAC or 115VAC input and an output of 120VAC at 0.25A, which is available from Element14. Also, I was intending to place the transformer inside the radio and also use a ground connection to overcome the hot chassis issue. Australian 240V?mains supply provides for a ground connection at the wall socket.

?

I want to avoid using an external transformer, so will see what else is available.

?

Cheers

Ron

VK2IRS

_._,_._,_


--
don??? va3drl
Re: S-38B Power Consumption

 

Hi folks,
Thanks for the good information on the current drain of the S-38B.
?
My intention is/was to use a Triad Magnetics TR6-120 transformer that has a 230VAC or 115VAC input and an output of 120VAC at 0.25A, which is available from Element14. Also, I was intending to place the transformer inside the radio and also use a ground connection to overcome the hot chassis issue. Australian 240V?mains supply provides for a ground connection at the wall socket.
?
I want to avoid using an external transformer, so will see what else is available.
?
Cheers
Ron
VK2IRS
Re: Hallicrafters net

 

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Thanks, guys, for all the replies. That is what I thought, just wanted to check to see if some one had started it back up.

73 and happy weekend!!!!!


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



From:[email protected] <[email protected]> on behalf of Peter A Markavage via groups.io <pmarkavage@...>
Sent:?Friday, April 11, 2025 4:26 PM
To:[email protected] <[email protected]>
Subject:?Re: [HallicraftersRadios] Hallicrafters net
?
we had one when Duane was alive but haven't heard a specific one in years.
20 meter vintage SSB net usually met around 14.293 MHz; heathkit net generally followed it.
40 meters:
?
Pete, wa2cwa
?
On Fri, 11 Apr 2025 18:51:24 +0000 "waltcates via groups.io" <cateswa@...> writes:
Does a Hallicrafters HF net exist.?


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

Re: S-38B Power Consumption

 

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Ron, Perhaps you are ?wanting a 240-120 nominal step-down transformer? for use in Australia? And want it to be isolating

Perhaps it will be located nearby the radio in open air? Or within the radio where mutual heating should be considered?

Have you decided on grounding for the radio, which in the original incarnation has a possible “hot chassis” ?


--
don??? va3drl
Re: Hallicrafters net

 

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we had one when Duane was alive but haven't heard a specific one in years.
20 meter vintage SSB net usually met around 14.293 MHz; heathkit net generally followed it.
40 meters:
?
Pete, wa2cwa
?
On Fri, 11 Apr 2025 18:51:24 +0000 "waltcates via groups.io" <cateswa@...> writes:

Does a Hallicrafters HF net exist.?


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


Re: S-38B Power Consumption

 

Not sure that a higher VA rating is really necessary for this small of an isolation transformer.

"It is possible to estimate the output voltage at intermediate loads since load regulation varies in an almost linear manner. For example, the 241-8-16 has a full-load rating of 16 V @ 6.25 A and a regulation of 10%. Its no-load output would be 10% more than 16 or 17.6 V. At half-load (3.12 A) its output would be 5% more than 16 or 16.8 V. Similar estimates can be made for any % load.

Another factor to bear in mind is that it is possible to safely exceed the VA rating of many small power transformers. If the added regulation (drop in output voltage) is acceptable, an “overload” may be permissible because the design is regulation-limited rather than heat rise-limited."? This is from:?

In other words, if a lower output voltage is tolerable say 95% worse case of 120 vac or some 114 vac then a 25 VA transformer operated at 100% of it's VA rating does no harm.? I doubt that the isolation transformer will be too warm to touch.
Jim


Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy


On Friday, April 11, 2025 at 01:14:48 PM CDT, Don VE3IDS via groups.io <ve3ids.don@...> wrote:


Ron,?

I just measured my s38b and it draws 208 mA with a supply voltage of 121 VAC. I think I would use a transformer with a good safety headroom. Maybe 50 VA so it doesn't get hot.?

73 Don ve3ids?


On Fri., Apr. 11, 2025, 2:31 a.m. Ron Sharp via , <vk2irs=[email protected]> wrote:
Hi folks,
I am restoring a Hallicrafters S38-B receiver and want to add an isolation transformer. So that I can select the correct transformer, I need to know the actual current the S38-B draws. I note in a PhotoFact Folder on the first model (the S-38) the current drain is shown 0.245 Amps @ 117V AC. This is cutting it fine with the transformer that I have (30VA), but as there is no BFO tube in the S-38B, I figure there may be less current drain overall. I recognise that the heater chain will still draw 150mA, but there should be a reduction in the DC (B supply) due to one less tube.
?
Would someone please advise the actual current drawn by the S38-B operating with an AC input?
?
Cheers
Ron
VK2IRS
Re: Hallicrafters net

 

The Vintage SSB Roundtable meets every Tuesday night at 7:00 PM CA time.

Early check-ins start at 6:30 PM.

Frequency is 3895.

It would be wonderful to hear some of you on from the Halli group!

Bob C.
WA9JIB

= = = = =

On Friday, April 11, 2025 at 12:52:01 PM PDT, edward schumacher <eddiewa9gqk@...> wrote:


There is a vintage ssb net I ran across a few months back and it is not brand specific. Have to page back through my scratch sheets to find the info. Think they were followed by a Heath net. Someone on one? of those might know if there is one for Hallicrafters.

When I get back down to my station I will check and send the? info.

Ed, WA9GQK

On Friday, April 11, 2025 at 01:51:31 PM CDT, waltcates via groups.io <cateswa@...> wrote:


Does a Hallicrafters HF net exist.?


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



























            

        




            

        

				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
			
				
	
		
	

		
			

			
			

			
			
				
				

					

						
							
							

							Re: Hallicrafters net
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				

        
There is a vintage ssb net I ran across a few months back and it is not brand specific. Have to page back through my scratch sheets to find the info. Think they were followed by a Heath net. Someone on one? of those might know if there is one for Hallicrafters.

When I get back down to my station I will check and send the? info.

Ed, WA9GQK


        
        

            

                
                

                        On Friday, April 11, 2025 at 01:51:31 PM CDT, waltcates via groups.io <cateswa@...> wrote:
                    

                    


                    


                
                
                


 






Does a Hallicrafters HF net exist.?



















Walt Cates, WD0GOF



?


A majority of acceptance is not proof of correctness.



























            

        

				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
			
				
	
		
	

		
			

			
			

			
			
				
				

					

						
							
							

							Re: Hallicrafters net
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				

  
  




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Walt 

    

    
there use to be a net but sadly i have not heard it in years.
      hope they just moved freq

    
73

    
Tony WA4JQS 

    

    


    

    


    

    
On 4/11/2025 2:51 PM, waltcates via
      groups.io wrote:

    

    

      
      
      

        Does a Hallicrafters HF net exist.?

      

        

        

      

        

          

          

        

          

            Walt Cates, WD0GOF

          

            ?

          
A majority of acceptance is not proof of correctness.


          

            

              

          

            

          

        

      

      
    

    
-- 

      Anthony W.DePrato WA4JQS
      CQ DX HALL OF FAME #39
      DXCC HONOR ROLL CW PHONE RTTY
      CALLS HELD VP8SSI VP8BZL V31SS 3Y0PI ZS8JQS WA4JQS/KC4 WA4JQS/ZS1

  

Virus-free.
 



				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
			
				
	
		
	

		
			

			
			

			
			
				
				

					

						
							
							

							Hallicrafters net
							
						
					

				

				

			
			

				

					


						
							

								
								
							

						
					

					

						
							


						
						 
						
							
							
						
						
					

				

			

			

			

				








开云体育



Does a Hallicrafters HF net exist.?



















Walt Cates, WD0GOF



?


A majority of acceptance is not proof of correctness.





















				
				
				
			

			
			

	

	
			

			

				
					

				
				
			

			

				

					

				

			

			
			
			

			


				
	



		
			
		
	

	
	
	
	


	

		
		
		
		
		
	

	

		
		
		
		
		
	

	
	

		
		
		
		
	



	

		

			
	
		

			
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