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Date
Re: Off-the-wall question

 

You also can get a cheap fm transmitter that plus into your sirius's unit, and transmits to the fm band. ?Again, very cheap and Amazon likely has them.
Re: Off-the-wall question

 

Google it! Then go to Amazon and buy it.?

73
dave
wa3gin

On Tue, Apr 8, 2025 at 3:32?PM Waldo Magnuson via <magnuson=[email protected]> wrote:
I would like to add SiriusXM to the radio in my 1999 Chevy Tahoe. It doesn’t have an Aux radio input. Does anyone know of a way to input the Sirius audio through the cassette input (some sort of an adapter)?
Sorry for the non-Hallicrafters question.
Skip Magnuson W7WGM

Re: Off-the-wall question

 

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You can get a device that is a casette-shaped interface that you put in the casette deck, and that has an aux input. ?Since it is a bit dated, look for a used one on eBay perhaps. ?Cheap.

On Apr 8, 2025, at 1:32?PM, Waldo Magnuson via groups.io <magnuson@...> wrote:

I would like to add SiriusXM to the radio in my 1999 Chevy Tahoe. It doesn’t have an Aux radio input. Does anyone know of a way to input the Sirius audio through the cassette input (some sort of an adapter)?
Sorry for the non-Hallicrafters question.
Skip Magnuson W7WGM

Off-the-wall question

 

I would like to add SiriusXM to the radio in my 1999 Chevy Tahoe. It doesn’t have an Aux radio input. Does anyone know of a way to input the Sirius audio through the cassette input (some sort of an adapter)?
Sorry for the non-Hallicrafters question.
Skip Magnuson W7WGM
Re: SX-111 Crystal Calibrator

 

Ed and Walt, thanks for that input. ?I will take your advice and will report back.
73
Re: SX-111 Crystal Calibrator

 

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As Ed stated the most common cause for the calibrator failure is the function switch.?

I would clean the switch, clean the pins and sockets of SO2 if still not working check the voltage at the pin 2 of plug SO2. It should be 150v when the calibrator is turned on.

Next connect a scope to the antenna terminal turn the calibrator on and check for any signal. Adjust C301 both ways to see if the oscillator will snap on.

That is all of the easy ones.?

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


From: [email protected] <[email protected]> on behalf of Bruce Kirkpatrick via groups.io <bkirkpatrick5@...>
Sent: Tuesday, April 8, 2025 9:44 AM
To: [email protected] <[email protected]>
Subject: [HallicraftersRadios] SX-111 Crystal Calibrator
?
Greetings
I am restoring an SX-111. ?The Crystal Calibrator does not work. ?The 6AU6 tube tests good, ?I will be tracing the circuit. ?Has anyone seen this problem and its solution?
Bruce?
KE?VR
Re: SX-111 Crystal Calibrator

 

Have only worked on a couple of those and one did have a faulty calibrator with an obvious problem. A previous tinkerer had broken the plastic envelope of the crystal and then tried to repair it with some red rubbery gunk. Crystal operation was then intermittent.

Don't remember now exactly how I got it going again but think I eventually did. The crystal is housed in what looks like a standard octal tube but with a plastic envelope rather than glass. If it is not damaged, you could try carefully pulling it and cleaning the socket pins with de-oxit. When removing it only hold the base and not the envelope itself.

Could also lift the entire calibrator unit and cleaning the socket pins for that may help. Otherwise there is not too much to the circuit except for the CAL switch itself.

Hope this helps.

73 ... Ed, WA9GQK

On Tuesday, April 8, 2025 at 10:18:46 AM CDT, Bruce Kirkpatrick via groups.io <bkirkpatrick5@...> wrote:


Greetings
I am restoring an SX-111. ?The Crystal Calibrator does not work. ?The 6AU6 tube tests good, ?I will be tracing the circuit. ?Has anyone seen this problem and its solution?
Bruce?
KE?VR
SX-111 Crystal Calibrator

 

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Greetings
I am restoring an SX-111. ?The Crystal Calibrator does not work. ?The 6AU6 tube tests good, ?I will be tracing the circuit. ?Has anyone seen this problem and its solution?
Bruce?
KE?VR
Re: Hallicrafters S40-B Restoration Advice

 

Bob
Thank you for that tip, I might have missed it, now I won't. Gathering parts right now, beginning to clean it up, lots of dirt, but no corrosion, thank to it having lived its life in a dry climate. No humidity where here in the EWA desert where I live.
73, Richard AG5M


On Monday, April 7, 2025 at 08:03:34 PM PDT, Robert Eckweiler <af6c@...> wrote:


When you get around to alignment, remember that the heterodyne oscillator tracks above the received frequency by 455 Kc on all band EXCEPT the top band (15.5 to 44 Mc). There it tracks below the received frequency. ?I don't think that was made clear in the manual.
?
On the S-40B receiver I recently worked on, the person who last aligned it didn't know this, and the slug was half out of the top of the coil and that band just wouldn't track.?
?
Bob, AF6C
?
Re: Hallicrafters S40-B Restoration Advice

 

When you get around to alignment, remember that the heterodyne oscillator tracks above the received frequency by 455 Kc on all band EXCEPT the top band (15.5 to 44 Mc). There it tracks below the received frequency. ?I don't think that was made clear in the manual.
?
On the S-40B receiver I recently worked on, the person who last aligned it didn't know this, and the slug was half out of the top of the coil and that band just wouldn't track.?
?
Bob, AF6C
?
Re: Hallicrafters S40-B Restoration Advice

 

Thank you Bob,

73.
Joe? AB1YO


On Monday, April 7, 2025 at 05:11:11 PM EDT, Dexter via groups.io <dexterdxer@...> wrote:


Joe, complete plans for a similar model loop antenna covering approximately 2.6 to 12.3 MHz is pictured below and described at
?
The model shown previously with the S-40B covers 3.4 to 15 MHz.? Each is essentially a transformer.? The primary is an LC resonant circuit.? The secondary is coaxial in the center and provides low-impedance output to a twisted pair, which is connected to the receiver.? The secondary size is switch-selectable to provide best impedance match across the tunable spectrum.
?
I have several models using the same principles which cover 150 kHz through 23 MHz.? A detailed theory, construction and operation of a medium-wave loop is at
?
For optimum peaks and nulls, the loop should really be adjustable 90-degrees vertically in addition to 360 degrees horizontally (the one pictured is not).? For complete rotation and elevation I have a wooden tripod, and each antenna assembly is mechanically balanced and fitted with a universal, fork.? At shortwave frequencies, signal nulls are problematic, but the loops are exceptional for cancelling local noise.
?
Further questions?
?
Bob C.
?
Re: Hallicrafters S40-B Restoration Advice

 

Joe, complete plans for a similar model loop antenna covering approximately 2.6 to 12.3 MHz is pictured below and described at
?
The model shown previously with the S-40B covers 3.4 to 15 MHz.? Each is essentially a transformer.? The primary is an LC resonant circuit.? The secondary is coaxial in the center and provides low-impedance output to a twisted pair, which is connected to the receiver.? The secondary size is switch-selectable to provide best impedance match across the tunable spectrum.
?
I have several models using the same principles which cover 150 kHz through 23 MHz.? A detailed theory, construction and operation of a medium-wave loop is at
?
For optimum peaks and nulls, the loop should really be adjustable 90-degrees vertically in addition to 360 degrees horizontally (the one pictured is not).? For complete rotation and elevation I have a wooden tripod, and each antenna assembly is mechanically balanced and fitted with a universal, fork.? At shortwave frequencies, signal nulls are problematic, but the loops are exceptional for cancelling local noise.
?
Further questions?
?
Bob C.
?
Re: power/tone switch 60A225

 

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Jim,?

Thanks for the tip, I am going to try that first chance I get.

Emil

On 07-Apr-25 13:49, Jim Whartenby via groups.io wrote:

Emil
If the switch still sounds good and you hear a crisp snap when the switch closes then the problem might be corrosion around the rivets that connect the solder tab plates to the internal switch contacts.??

Easy to test, just ohm out the switch using the rivets, not the solder tabs.? With the switch closed, if the rivets ohm out as a short then just wire brush the rivets and use an active flux like Nokorode?and solder the rive tops to to the surrounding solder tab plates.??

I once had a Philco cathedral radio with this same problem where the dreaded previous owner had added a toggle switch to the side of the wood cabinet.? I did the above fix and removed the replacement switch then patched the hole in the cabinet with wood filler.? I used a scratch pen to match the color.? Hard to see the repair after the work was done.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
Re: power/tone switch 60A225

 

Emil
If the switch still sounds good and you hear a crisp snap when the switch closes then the problem might be corrosion around the rivets that connect the solder tab plates to the internal switch contacts.??

Easy to test, just ohm out the switch using the rivets, not the solder tabs.? With the switch closed, if the rivets ohm out as a short then just wire brush the rivets and use an active flux like Nokorode?and solder the rive tops to to the surrounding solder tab plates.??

I once had a Philco cathedral radio with this same problem where the dreaded previous owner had added a toggle switch to the side of the wood cabinet.? I did the above fix and removed the replacement switch then patched the hole in the cabinet with wood filler.? I used a scratch pen to match the color.? Hard to see the repair after the work was done.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy


On Monday, April 7, 2025 at 08:40:15 AM CDT, Emil via groups.io <wd4scz@...> wrote:


The power/ tone control switch on my S-40B has failed.?
The Hallicrafters part number for power/tone switch is 60A225. That is
the same part number for the power/tone switch in the S-40, S-40A,
S-40B, S-85, SX-99 and probably several other Hallicrafters sets using
a similar tube lineup. ?I could bypass the switch with a
jumper and turn the set on and off with a power strip. I could wire in mini toggle in parallel and hide it in the back
still allowing the tone control to work. ?I could replace it with a
switched audio pot but that just seems cheesy. Anyone robbed a switch from a pot and successfully grafted it or have a better solution?
?
Emil WD4SZ
Re: Hallicrafters S40-B Restoration Advice

 

Hi Dexter,

Can you send a close-up photo(s) of your loop antenna?? Is it tunable?

73.
Joe? AB1YO

On Monday, April 7, 2025 at 10:28:59 AM EDT, Emanuele Girlando via groups.io <emanuele_girlando@...> wrote:


Hello Richard!
I've just done an S85.. very similar rig. Just search the group...for more info.
Here are some of choices I made.
Be aware of C56. It is an hazard to your life! It's also called the "death capacitor".
I replaced it with a modern CM main filter pulled from on old printer:
?
I didn't want to mess with desoldering the original components to avoid stressing the original terminal too much.
In particular the IF cans terminals are internally bonded with very heat sensitive plastic frame that melts very easily (not sure for the S40).
I used the "spring terminal" approach with very satisfactory result:
?
? ?
?
About the two 6.3V-0.3A filament bulbs: I had to replace both, but had to buy 100!! So I have 98 left for selling.
--
Emanuele (IU1KNR).
Re: Need help with HT-40 MK 1 troubleshooting

 

I guess this was factory wired...it is gray and light gray.
?
Thanks Again.
?
Larry
Re: Hallicrafters S40-B Restoration Advice

 

Hello Richard!
I've just done an S85.. very similar rig. Just search the group...for more info.
Here are some of choices I made.
Be aware of C56. It is an hazard to your life! It's also called the "death capacitor".
I replaced it with a modern CM main filter pulled from on old printer:
?
I didn't want to mess with desoldering the original components to avoid stressing the original terminal too much.
In particular the IF cans terminals are internally bonded with very heat sensitive plastic frame that melts very easily (not sure for the S40).
I used the "spring terminal" approach with very satisfactory result:
?
? ?
?
About the two 6.3V-0.3A filament bulbs: I had to replace both, but had to buy 100!! So I have 98 left for selling.
--
Emanuele (IU1KNR).
Re: Need help with HT-40 MK 1 troubleshooting

 

I see you fixed the metering switch connections.? One more thing. The
kit versions of the HT40/SX140 front panel is dark gray with a light
greenish/blue(?) color.? The factory wired radio panel is gray and light
gray.

Joe Hutchens
AJ8MH - Radio
Marquette, MI
power/tone switch 60A225

 

The power/ tone control switch on my S-40B has failed.?
The Hallicrafters part number for power/tone switch is 60A225. That is
the same part number for the power/tone switch in the S-40, S-40A,
S-40B, S-85, SX-99 and probably several other Hallicrafters sets using
a similar tube lineup. ?I could bypass the switch with a
jumper and turn the set on and off with a power strip. I could wire in mini toggle in parallel and hide it in the back
still allowing the tone control to work. ?I could replace it with a
switched audio pot but that just seems cheesy. Anyone robbed a switch from a pot and successfully grafted it or have a better solution?
?
Emil WD4SZ
Re: Need help with HT-40 MK 1 troubleshooting

 

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Unbelievable!!! ?Good work. It could be just a bad output/drive meter switch… with the VFO, I only get one bar on the drive meter.

Joe (AJ8MH-Radio)
Sent by Wireless!


On Apr 6, 2025, at 11:40?PM, Larry - WA2DGD via groups.io <wa2dgd@...> wrote:

?

[Edited Message Follows]

Joe,
Thanks for the info from the mods. Had a break through early this morning.
?
I kept staring at the function switch and something didn't look right, so I enlarged the photo of the function switch for the Mark 1, which is different than the standard HT40.
?
I thought this was a factory assembled unit, all the tube sockets and terminal strips are riveted with lock washers. But in it's 60 year life someone else was in there. The function switch had one wire about 3 terminals off in the wrong direction. At 2 am this morning I fixed that wire and all the voltages fell into place.? I went to sleep.
?
Just got back from days activites. I put a new 6CX8 and new 6DQ5 in the rig. Oddly it still shows no grid current in tune but when I went to AM or CW I have power out. On CW I get about 55 watts out and can modulate the rig and hear myself on AM. The Drive control does function to peak the output, just have to figure out why it's not showing on the meter.
?
Thank you for all your help.?
Larry
WA2DGD
?
PS:? found a ground missing on the meter switch, now I can read Grid Current. Now to get it on the air.
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