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Re: 60A225 power/tone switch
开云体育Emile, a little brighter for my eyes ? From: [email protected] [mailto:[email protected]] On Behalf Of Emil via groups.io
Sent: Wednesday, May 21, 2025 8:11 PM To: [email protected] Subject: Re: [HallicraftersRadios] 60A225 power/tone switch ? Jim,? you are about half right. Imagine a single wafer switch with fixed resistors at various points, that is the TONE half of the? switchan the same shaft is an SPST switch like on the back half of a pot/switch unit.? Here is the best picture I have. You see the front wafer clearly. It is the back hafl, indicated in red that has failed. It is not like a function switch in a DX-60 where the AC is switched through the wafers.? The TONE part works fine. The simplest solution would be to jump the SPST contacts making the power cord hot all the time and plug the radio into a power strip. Emil de WD4SCZ -- don??? va3drl |
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Re: 60A225 power/tone switch
开云体育Jim,? you are about half right. Imagine a single wafer switch
with fixed resistors at various points, that is the TONE half of
the? switchan the same shaft is an SPST switch like on the back
half of a pot/switch unit.? Here is the best picture I have. You
see the front wafer clearly. It is the back hafl, indicated in red
that has failed. It is not like a function switch in a DX-60 where
the AC is switched through the wafers.? The TONE part works fine.
The simplest solution would be to jump the SPST contacts making
the power cord hot all the time and plug the radio into a power
strip. Emil de WD4SCZ
On 21-May-25 17:08, Jim Whartenby via
groups.io wrote:
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Re: 60A225 power/tone switch
Don - Not a very good one but here is a pic of the front panel and another showing the switch.? This had a toggle switch wired in for power since the original switch was busted.? I think I removed the toggle and fixed the switch but I have slept many times since then.? The pic of the back of the switch was before I wired it back up...
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Justin B. KI5GKD |
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Re: 60A225 power/tone switch
In a previous post, I mentioned that the ground ring on some tube sockets have a high impedance connection to the chassis even though there are two rivets fixing the tube socket to the chassis.? This high impedance will cause a number of weird problems that will cause additional head scratching.? I have been down this road before and was trying to save someone from more headaches. Now I most likely misunderstood that the tone control with a power switch is not a normal volume control pot and switch combination.? My bad.? I would suggest acquiring a NOS switch as opposed to one form an organ donor chassis.? Chances are that the OD has had as many ON/OFF cycles as the switch you are trying to replace.? It is a reliability issue. If that switch cannot be found, there is still the possibility of finding a four position wafer switch with several wafers on it,? You could parallel a few wafers to be the ON/OFF power function.? There should be several solutions to this problem that does not require one to look for unobtanium replacements.?? Contact arcing is an issue with any switch.? One tried and true solution is to beef up the switch contacts to withstand the arcing.? Another is to place a capacitor across the open contacts.? When the power switch is turned OFF the capacitor will prevent switch contact arcing.? It is just a mater of the cap value to reduce or eliminate the arc. Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Wednesday, May 21, 2025 at 01:45:12 PM CDT, don Root <drootofallevil@...> wrote:
Jim, Im just talking out loud re riveted connections.MY guess is that Cu-Cu ?would work fairly well. But in general, what material are being riveted? And how??? Loking at this switch, it appears that the visible terminal connects to the rivet, and the rivet conducts thru the insulation to something inside; so the rivet has two pressure connection places. If the inner contact is bad, soldering the outside probably wont work. Maybe I’ll have to open some old parts boxes. ? I have never read about how a rivet maintains pressure, or how much is needed to ensure a good contact.. a black art? ? From: [email protected] [mailto:[email protected]] On Behalf Of Jim Whartenby via groups.io
Sent: Wednesday, May 21, 2025 1:01 PM To: [email protected] Subject: Re: [HallicraftersRadios] 60A225 power/tone switch ? Those are the rivets, previously mentioned, that connect the external solder lugs to the internal switch contacts.? Notice the tarnish on the rivets, they are not as bright as the finish on the solder lugs.? Once the interface resistance between the rivet and the lug reaches a?sufficiently high value, the switch is permanently open.? A little wire brushing, bit of solder paste and a touch of solder will restore a low resistance contact. Jim ? -- don??? va3drl |
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Re: 60A225 power/tone switch
开云体育Yes Emil, I guess, when I saw the image, I just decided to be sure about the appearance of a rivet . The ones on your wafer switch won’t be the same. ? From: [email protected] [mailto:[email protected]] On Behalf Of Emil via groups.io
Sent: Wednesday, May 21, 2025 1:53 PM To: [email protected] Subject: Re: [HallicraftersRadios] 60A225 power/tone switch ? That's looks like a switch and a pot. It might could be made to work, but that is not what is supposed to be there.? The original component has a rotary switch wafer with fixed resistors for the tone control with an SPST mounted with it. Emil WD4SCZ ? -- don??? va3drl |
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Re: 60A225 power/tone switch
开云体育Jim, Im just talking out loud re riveted connections.MY guess is that Cu-Cu ?would work fairly well. But in general, what material are being riveted? And how??? Loking at this switch, it appears that the visible terminal connects to the rivet, and the rivet conducts thru the insulation to something inside; so the rivet has two pressure connection places. If the inner contact is bad, soldering the outside probably wont work. Maybe I’ll have to open some old parts boxes. ? I have never read about how a rivet maintains pressure, or how much is needed to ensure a good contact.. a black art? ? From: [email protected] [mailto:[email protected]] On Behalf Of Jim Whartenby via groups.io
Sent: Wednesday, May 21, 2025 1:01 PM To: [email protected] Subject: Re: [HallicraftersRadios] 60A225 power/tone switch ? Those are the rivets, previously mentioned, that connect the external solder lugs to the internal switch contacts.? Notice the tarnish on the rivets, they are not as bright as the finish on the solder lugs.? Once the interface resistance between the rivet and the lug reaches a?sufficiently high value, the switch is permanently open.? A little wire brushing, bit of solder paste and a touch of solder will restore a low resistance contact. Jim ? -- don??? va3drl |
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Re: 60A225 power/tone switch
开云体育That's looks like a switch and a pot. It might could be made to work, but that is not what is supposed to be there.? The original component has a rotary switch wafer with fixed resistors for the tone control with an SPST mounted with it. Emil WD4SCZ On 21-May-25 11:38, Russ Tobolic via
groups.io wrote:
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Re: 60A225 power/tone switch
Yes Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Wednesday, May 21, 2025 at 11:42:20 AM CDT, don Root <drootofallevil@...> wrote:
? From: [email protected] [mailto:[email protected]] On Behalf Of Russ Tobolic via groups.io
Sent: Wednesday, May 21, 2025 11:38 AM To: [email protected] Subject: Re: [HallicraftersRadios] 60A225 power/tone switch ? I found this in my junkbox.? Would it work for you? ? Russ,N3CO
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Re: 60A225 power/tone switch
Those are the rivets, previously mentioned, that connect the external solder lugs to the internal switch contacts.? Notice the tarnish on the rivets, they are not as bright as the finish on the solder lugs.? Once the interface resistance between the rivet and the lug reaches a?sufficiently high value, the switch is permanently open.? A little wire brushing, bit of solder paste and a touch of solder will restore a low resistance contact. Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Wednesday, May 21, 2025 at 10:38:20 AM CDT, Russ Tobolic via groups.io <erusst@...> wrote:
I found this in my junkbox.? Would it work for you?
?
Russ,N3CO
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Re: 60A225 power/tone switch
From: [email protected] [mailto:[email protected]] On Behalf Of Russ Tobolic via groups.io
Sent: Wednesday, May 21, 2025 11:38 AM To: [email protected] Subject: Re: [HallicraftersRadios] 60A225 power/tone switch ? I found this in my junkbox.? Would it work for you? ? Russ,N3CO _._,_._,_ -- don??? va3drl |
don Root
Emil
Jim Whartenby