Identify transformer
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Still cleaning out cabinets. I have a transformer and cannot remember what it goes to. It has a Hallicrafters part # 050-004270. It has another number that may be a manufacturer's in-house part # or it could be a date code 5247120, perhaps week 20 of 1971?????
I have a hunch it may be for one of the SBT rigs.?
Any good ideas out there?????
Walt Cates, WD0GOF
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开云体育Turns ratio? ? from… Sergeant Friday From: [email protected] [mailto:[email protected]] On Behalf Of waltcates via groups.io
Sent: Sunday, December 1, 2024 5:08 PM To: HALLI IO GROUP Subject: [HallicraftersRadios] Identify transformer ? Still cleaning out cabinets. I have a transformer and cannot remember what it goes to. It has a Hallicrafters part # 050-004270. It has another number that may be a manufacturer's in-house part # or it could be a date code 5247120, perhaps week 20 of 1971????? I have a hunch it may be for one of the SBT rigs.? ? -- don??? va3drl |
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Don,? did the photos come through on the original message. If they did, all the information I have is there.
Walt Cates, WD0GOF
?
From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...>
Sent: Sunday, December 1, 2024 5:52 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
Turns ratio? ? from… Sergeant Friday From: [email protected] [mailto:[email protected]]
On Behalf Of waltcates via groups.io ? Still cleaning out cabinets. I have a transformer and cannot remember what it goes to. It has a Hallicrafters part # 050-004270. It has another number that may be a manufacturer's in-house part # or it could be a date code 5247120, perhaps week 20 of 1971????? I have a hunch it may be for one of the SBT rigs.? ? -- don??? va3drl |
开云体育Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ? From: [email protected] [mailto:[email protected]] On Behalf Of waltcates via groups.io
Sent: Sunday, December 1, 2024 6:35 PM To: [email protected] Subject: Re: [HallicraftersRadios] Identify transformer ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ? -- don??? va3drl |
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I am not really interested?in further characteristics?of the transformer or building anything with it. I would like to know what radio it was used in so?I can make it available to someone who needs?it.
Walt Cates, WD0GOF
?
From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...>
Sent: Sunday, December 1, 2024 9:06 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ? From: [email protected] [mailto:[email protected]]
On Behalf Of waltcates via groups.io ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ? -- don??? va3drl |
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Don With a primary resistance of 85 ohms @ 12 Henrys and a secondary resistance of 0.6 ohms @ 0.055 Henrys how could this possibly be a step-up power transformer?? At 7 pounds, I would guess it would have a rating of perhaps 150 V-A.? So if the full secondary is around 24 volts, the current would be around 6 amps. Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Sunday, December 1, 2024 at 08:07:04 PM CST, don Root <drootofallevil@...> wrote:
Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ? From: [email protected] [mailto:[email protected]] On Behalf Of waltcates via groups.io
Sent: Sunday, December 1, 2024 6:35 PM To: [email protected] Subject: Re: [HallicraftersRadios] Identify transformer ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ? -- don??? va3drl |
开云体育Thanks Jim, I must be visually wonky. That is bad. I know I should write the numbers down and compare apples with apples, but… ??a real goof here. Yes it must be a real step-down. 150 VA seems reasonable. ? From: [email protected] [mailto:[email protected]] On Behalf Of Jim Whartenby via groups.io
Sent: Monday, December 2, 2024 3:16 AM To: [email protected] Subject: Re: [HallicraftersRadios] Identify transformer ? Don With a primary resistance of 85 ohms @ 12 Henrys and a secondary resistance of 0.6 ohms @ 0.055 Henrys how could this possibly be a step-up power transformer?? At 7 pounds, I would guess it would have a rating of perhaps 150 V-A.? So if the full secondary is around 24 volts, the current would be around 6 amps. Jim ? ? Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy ? ? On Sunday, December 1, 2024 at 08:07:04 PM CST, don Root <drootofallevil@...> wrote: ? ? Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ? From: [email protected] [mailto:[email protected]] On Behalf Of waltcates via groups.io ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ?
? -- don??? va3drl |
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Flip the drawing and you could have a push pull amp driving another stage.
Walt Cates, WD0GOF
?
From: [email protected] <[email protected]> on behalf of Jim Whartenby via groups.io <old_radio@...>
Sent: Monday, December 2, 2024 3:15 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
Don
With a primary resistance of 85 ohms @ 12 Henrys and a secondary resistance of 0.6 ohms @ 0.055 Henrys how could this possibly be a step-up power transformer?? At 7 pounds, I would guess it would have a rating of perhaps 150
V-A.? So if the full secondary is around 24 volts, the current would be around 6 amps.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Sunday, December 1, 2024 at 08:07:04 PM CST, don Root <drootofallevil@...> wrote:
Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ? From: [email protected] [mailto:[email protected]]
On Behalf Of waltcates via groups.io ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ? -- don??? va3drl |
|
All thing are possible since transformers are bilateral.? Typically, audio transformers do not use two black leads or two red leads for that matter and the laminations are usually thinner then those for AC power transformers. OUTPUT TRANSFORMERS
ARRL Radio Amateur's Handbook:? Single-ended transformers:? Plate lead (pri.) -------------- blue (or brown)? B+ (power supply) lead --------- red? speaker (typ. +) (sec.) -------- green (or yellow)? speaker return (sec.) ---------- black? I found the above info on the web, don't know who wrote it.? The full file is attached. Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Monday, December 2, 2024 at 08:36:36 AM CST, waltcates via groups.io <cateswa@...> wrote:
Flip the drawing and you could have a push pull amp driving another stage.
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
From: [email protected] <[email protected]> on behalf of Jim Whartenby via groups.io <old_radio@...>
Sent: Monday, December 2, 2024 3:15 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
Don
With a primary resistance of 85 ohms @ 12 Henrys and a secondary resistance of 0.6 ohms @ 0.055 Henrys how could this possibly be a step-up power transformer?? At 7 pounds, I would guess it would have a rating of perhaps 150
V-A.? So if the full secondary is around 24 volts, the current would be around 6 amps.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Sunday, December 1, 2024 at 08:07:04 PM CST, don Root <drootofallevil@...> wrote:
Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ? From: [email protected] [mailto:[email protected]]
On Behalf Of waltcates via groups.io ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ? -- don??? va3drl |
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Jim,
That list you attached came from my website. That is what is so confusing about this hunk of iron. Those colors don't match any standard.? ??
Walt Cates, WD0GOF
?
From: [email protected] <[email protected]> on behalf of Jim Whartenby via groups.io <old_radio@...>
Sent: Monday, December 2, 2024 2:48 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
All thing are possible since transformers are bilateral.? Typically, audio transformers do not use two black leads or two red leads for that matter and the laminations are usually thinner then those for AC power transformers.
OUTPUT TRANSFORMERS ARRL Radio Amateur's Handbook:?
Single-ended transformers:?
Plate lead (pri.) -------------- blue (or brown)?
B+ (power supply) lead --------- red?
speaker (typ. +) (sec.) -------- green (or yellow)?
speaker return (sec.) ---------- black?
I found the above info on the web, don't know who wrote it.? The full file is attached.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Monday, December 2, 2024 at 08:36:36 AM CST, waltcates via groups.io <cateswa@...> wrote:
Flip the drawing and you could have a push pull amp driving another stage.
Walt Cates,
WD0GOF
?
A majority of acceptance is not proof of correctness.
From: [email protected] <[email protected]> on behalf of Jim Whartenby via groups.io <old_radio@...>
Sent: Monday, December 2, 2024 3:15 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
Don
With a primary resistance of 85 ohms @ 12 Henrys and a secondary resistance of 0.6 ohms @ 0.055 Henrys how could this possibly be a step-up power transformer?? At 7 pounds, I would guess it would have a rating of perhaps 150 V-A.? So if the full
secondary is around 24 volts, the current would be around 6 amps.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Sunday, December 1, 2024 at 08:07:04 PM CST, don Root <drootofallevil@...> wrote:
Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ?
From: [email protected] [mailto:[email protected]]
On Behalf Of waltcates via groups.io ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ? -- don??? va3drl |
|
Walt You can always apply 12VAC to the black leads and measure what what is on the red leads.? Still feel that it is an AC step down power transformer. You should put your call on that document.? Always sign your work! Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Monday, December 2, 2024 at 02:12:56 PM CST, waltcates via groups.io <cateswa@...> wrote:
Jim,
That list you attached came from my website. That is what is so confusing about this hunk of iron. Those colors don't match any standard.? ??
Walt Cates, WD0GOF
?
A majority of acceptance is not proof of correctness.
From: [email protected] <[email protected]> on behalf of Jim Whartenby via groups.io <old_radio@...>
Sent: Monday, December 2, 2024 2:48 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
All thing are possible since transformers are bilateral.? Typically, audio transformers do not use two black leads or two red leads for that matter and the laminations are usually thinner then those for AC power transformers.
OUTPUT TRANSFORMERS ARRL Radio Amateur's Handbook:?
Single-ended transformers:?
Plate lead (pri.) -------------- blue (or brown)?
B+ (power supply) lead --------- red?
speaker (typ. +) (sec.) -------- green (or yellow)?
speaker return (sec.) ---------- black?
I found the above info on the web, don't know who wrote it.? The full file is attached.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Monday, December 2, 2024 at 08:36:36 AM CST, waltcates via groups.io <cateswa@...> wrote:
Flip the drawing and you could have a push pull amp driving another stage.
Walt Cates,
WD0GOF
?
A majority of acceptance is not proof of correctness.
From: [email protected] <[email protected]> on behalf of Jim Whartenby via groups.io <old_radio@...>
Sent: Monday, December 2, 2024 3:15 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Identify transformer ?
Don
With a primary resistance of 85 ohms @ 12 Henrys and a secondary resistance of 0.6 ohms @ 0.055 Henrys how could this possibly be a step-up power transformer?? At 7 pounds, I would guess it would have a rating of perhaps 150 V-A.? So if the full
secondary is around 24 volts, the current would be around 6 amps.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
On Sunday, December 1, 2024 at 08:07:04 PM CST, don Root <drootofallevil@...> wrote:
Yes Walt ? I consider the turns ratio to be a primary characteristic of any transformer, but voltage ratio is usually much the same.. assuming I was guessing that you just measured it and have it on the bench. Halli seems to like? “52….” for a power transformer ???so that might be a clue , but it has no filament windings so ?? ?From the ?impedance ratios , it is likely a step up , ? ?Have a look at the saturation knee to see if it fits 120vac? ?
From: [email protected] [mailto:[email protected]]
On Behalf Of waltcates via groups.io ? Don,? did the photos come through on the original message. If they did, all the information I have is there. ? ? -- don??? va3drl |
开云体育Walt and Jim and All Black wires in and red wires out remind me of typical B+ ?power transformers. B+ for transistors were low voltage back then, so maybe ?you have a low voltage B+ rectifier transformer ,[ and no heaters needed]. Trial#1---- R.Pri? =85??? R.sec tot = .3+.3 = .6 ?Res ratio [P/S]?? 85 /? 0.6=? ??141??????? and?????? ??Similar X ratio? 12/.06 = 200 ? Turns ratio calculated from Res ratio [simplified assumptions ] = ???√141?? = a bit under 12, so use 12 ? Assume 120 v primary,? so secondary = 120/ 12? =? 10V C.T. ? I was looking at Filament and rectifier transformers in a 1974 Hammond catalog? 150 VA was 7.5 Lbs So that’s my guess until Jim reverses my mental gymnastics ? ? From: [email protected] [mailto:[email protected]] On Behalf Of waltcates via groups.io
Sent: Monday, December 2, 2024 3:13 PM To: [email protected] Subject: Re: [HallicraftersRadios] Identify transformer ? Jim, ? That list you attached came from my website. That is what is so confusing about this hunk of iron. Those colors don't match any standard.? ?? ?
?
_._,_._,_ -- don??? va3drl |
开云体育Richard, ???The old formula I learned is X= 2πfL. ?for 60 cycles--- ?6.28 *60* 12 = ??4521.6 ?[a lot of X-ohms ?] ?compared to 85 R-ohms, but that must be the magnetizing inductance at some low voltage. ? yes turns ratio measured by voltage ratio would help From: [email protected] [mailto:[email protected]] On Behalf Of Richard Knoppow via groups.io
Sent: Monday, December 2, 2024 6:11 PM To: [email protected] Subject: Re: [HallicraftersRadios] Identify transformer ? This is still an odd transformer. There have been systems of color -- don??? va3drl |
waltcates
don Root
Jim Whartenby