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Re: SX-62 FM respons
Scott
If I understand it correctly, the 62 uses only the 10.7 IF’s for the high 2 bands, but it can do AM as well as FM on those bands. Maybe it is possible that it is processing the FM as AM using slope detection, perhaps due to a dirty contact on the selectivity switch. As a comparison, with a FM station tuned in using FM, what difference do you get if you then select AM ? |
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Re: SX-62 FM respons
开云体育sorry for the typo RADIOS BY HALLICRAFTERS
?Walt Cates,
WD0GOF
?
Your past has no control over your future. Only your NOW can impact your future.
From: [email protected] <[email protected]> on behalf of waltcates <cateswa@...>
Sent: Monday, January 16, 2023 11:32 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
According to "RDIOS BY HALLICRAFTERS" the R-42 was designed
for the SX-42
?Walt Cates,
WD0GOF
?
Your past has no control over your future. Only your NOW can impact your future.
From: [email protected] <[email protected]> on behalf of Dan <pitfit@...>
Sent: Monday, January 16, 2023 10:59 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Agree on the R-42 Reproducer. First I ever heard was in the shop of W3HM, Howard Mills, a couple of years ago. Wonderful. It was hooked to my 51J4 at the time - not famous for "hifi audio" - but it sounded great!
What Hallicrafters radio was the R-42 originally introduced for? I have no idea. The SX-62?
Dan
WB4GRA
On Jan 16, 2023, at 11:11 AM, Tom Dailey <radio@...> wrote:
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Re: SX-62 FM respons
开云体育According to "RDIOS BY HALLICRAFTERS" the R-42 was
designed for the SX-42
?Walt Cates,
WD0GOF
?
Your past has no control over your future. Only your NOW can impact your future.
From: [email protected] <[email protected]> on behalf of Dan <pitfit@...>
Sent: Monday, January 16, 2023 10:59 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Agree on the R-42 Reproducer. First I ever heard was in the shop of W3HM, Howard Mills, a couple of years ago. Wonderful. It was hooked to my 51J4 at the time - not famous for "hifi audio" - but it sounded great!
What Hallicrafters radio was the R-42 originally introduced for? I have no idea. The SX-62?
Dan
WB4GRA
On Jan 16, 2023, at 11:11 AM, Tom Dailey <radio@...> wrote:
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Re: SX-62 FM respons
开云体育Agree on the R-42 Reproducer. First I ever heard was in the shop of W3HM, Howard Mills, a couple of years ago. Wonderful. It was hooked to my 51J4 at the time - not famous for "hifi audio" - but it sounded great!What Hallicrafters radio was the R-42 originally introduced for? I have no idea. The SX-62? Dan WB4GRA On Jan 16, 2023, at 11:11 AM, Tom Dailey <radio@...> wrote:
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Re: SX-62 FM respons
开云体育I saw one at Sussex last year, but there was quite a bit wax on the chassis around the opt, so
it may have been cooked, and the radio was $100 ish, so I passed. The owner wasn't around, so I couldn't negotiate either.
From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 11:45 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Ebay is one of the places I keep a watch on, but it’s also the main place where the crazies try to get antique store prices for inoperable junk.? Sometimes making an offer will bring the price down, sometimes not.? My favorite hunting ground is hamfests. ? 73 – Steve, KW4H ? From:
<[email protected]> on behalf of Scott Petersen <s-petersen@...> ? The 62A I bought was $75 with $75 shipping in E-bay, but it wasn't packed well, and the clear glass was broken, and dial glass supports were bent, Rf controll was npushed in, several other smaller issues, seller refunded???and I fixed it, it looks fine now. From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...> ? Thanks for the tips.? I keep a watch for certain models, and the SX-62A is now one of them.? It can take time to find a reasonable deal. ? From:
<[email protected]> on behalf of Tom Dailey <radio@...> ? I’ve had (and redone) both… yeah, the “A” is better…? That said, if you score one, try to find the “Reproducer” speaker… they sound like a concert hall.? First time I ran my first rebuilt one (on FM bcst), the XYL asked “Did you get a new stereo?? It sounds wonderful!” ? Tom - W?EAJ |
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Re: SX-62 FM respons
开云体育The SX-62 has a fairly delicate output transformer that is sensitive to
bad coupling caps in the output stages, sometimes you will find one half of the transformer open.
If you get a chance to evaluate the radio before purchase, you can test
for resistance to the plate pin of each of the output tubes. With a bad transformer the audio will be weak, or dead.
From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 11:24 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Thanks for the tips.? I keep a watch for certain models, and the SX-62A is now one of them.? It can take time to find a reasonable deal. ? From:
<[email protected]> on behalf of Tom Dailey <radio@...> ? I’ve had (and redone) both… yeah, the “A” is better…? That said, if you score one, try to find the “Reproducer” speaker… they sound like a concert hall.? First time I ran my first rebuilt one (on FM bcst), the XYL asked “Did you get a new stereo?? It sounds wonderful!” ? Tom - W?EAJ |
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Re: SX-62 FM respons
开云体育Ebay is one of the places I keep a watch on, but it’s also the main place where the crazies try to get antique store prices for inoperable junk.? Sometimes making an offer will bring the price down, sometimes not.? My favorite hunting ground is hamfests. ? 73 – Steve, KW4H ? From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? The 62A I bought was $75 with $75 shipping in E-bay, but it wasn't packed well, and the clear glass was broken, and dial glass supports were bent, Rf controll was npushed in, several other smaller issues, seller refunded???and I fixed it, it looks fine now. From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 11:24 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ? Thanks for the tips.? I keep a watch for certain models, and the SX-62A is now one of them.? It can take time to find a reasonable deal. ? From: <[email protected]> on behalf of Tom Dailey <radio@...> ? I’ve had (and redone) both… yeah, the “A” is better…? That said, if you score one, try to find the “Reproducer” speaker… they sound like a concert hall.? First time I ran my first rebuilt one (on FM bcst), the XYL asked “Did you get a new stereo?? It sounds wonderful!” ? Tom - W?EAJ |
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Re: SX-62 FM respons
开云体育The 62A I bought was $75 with $75 shipping in E-bay, but it wasn't packed well, and the clear
glass was broken, and dial glass supports were bent, Rf controll was npushed in, several other smaller issues, seller refunded???and I fixed it, it looks fine now.
From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 11:24 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Thanks for the tips.? I keep a watch for certain models, and the SX-62A is now one of them.? It can take time to find a reasonable deal. ? From:
<[email protected]> on behalf of Tom Dailey <radio@...> ? I’ve had (and redone) both… yeah, the “A” is better…? That said, if you score one, try to find the “Reproducer” speaker… they sound like a concert hall.? First time I ran my first rebuilt one (on FM bcst), the XYL asked “Did you get a new stereo?? It sounds wonderful!” ? Tom - W?EAJ |
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Re: SX-62 FM respons
开云体育Thanks for the tips.? I keep a watch for certain models, and the SX-62A is now one of them.? It can take time to find a reasonable deal. ? From: <[email protected]> on behalf of Tom Dailey <radio@...> ? I’ve had (and redone) both… yeah, the “A” is better…? That said, if you score one, try to find the “Reproducer” speaker… they sound like a concert hall.? First time I ran my first rebuilt one (on FM bcst), the XYL asked “Did you get a new stereo?? It sounds wonderful!” ? Tom - W?EAJ |
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Re: SX-62 FM respons
开云体育Thank You!
So there is hope of it sounding "correct". I will try again as soon as I have time(I'm still working,
so there never seems to be enough time for my projects,
From: [email protected] <[email protected]> on behalf of Tom Dailey <radio@...>
Sent: Monday, January 16, 2023 11:11 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
I’ve had (and redone) both… yeah, the “A” is better…? That said, if you score one, try to find the “Reproducer” speaker… they sound like a concert hall.? First time I ran my first rebuilt one (on FM bcst), the XYL asked “Did you get a new stereo?? It sounds wonderful!” ? Tom - W?EAJ |
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Re: SX-62 FM respons
开云体育I’ve had (and redone) both… yeah, the “A” is better…? That said, if you score one, try to find the “Reproducer” speaker… they sound like a concert hall.? First time I ran my first rebuilt one (on FM bcst), the XYL asked “Did you get a new stereo?? It sounds wonderful!” ? Tom - W?EAJ |
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Re: SX-62 FM respons
开云体育the 62A is a better receiver of the 2 ( in my opinion), it has a standard
speaker output besides the 5000 ohm speaker, and there are less loktal tubes in it ( I don't like those).
From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 10:47 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
An SX-62 is on my short list to acquire and restore.? Until that happens, the only info I have is anecdotal and from research on the model. ? 73 – Steve, KW4H ? From:
<[email protected]> on behalf of Scott Petersen <s-petersen@...> ? I have replaced them in 1 of the 2 62's. I First bought a SX-62(kind of a wreck), recapped it, and it performed well except for FM audio, I then recapped the discriminator , and re adjusted it per the alignment instructions, but it didn't really help, so I found a 62A and it performed pretty much the same way, after recapping except for the discriminator, which I didn't do yet (because on the last one it didn't help) at that point I became annoyed with it, and shelved it for another day. I would really like to know if someone has listened to one working correctly, and their opinion of the sound. I will be retiring this year, then it will be back on the bench. ? From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...> ? Well – some other things to try first, then.? The SX-62 is notorious for bad micas, and if not done yet you should replace every mica in the FM discriminator transformer.? FM performance will be impacted by even the smallest of leaks in those caps.? Were those replaced already? ? 73 – Steve, KW4H ? From:
<[email protected]> on behalf of Scott Petersen <s-petersen@...> ? I don't have a sweep generator, or spectrum analyzer I have an oscilloscope, standard rf signal generator, many different volt meters. From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...> ? Do you have the gear to do a sweep alignment?? Ideally and if available, use a spectrum analyzer with a tracking generator so you can visualize the FM IF and have a better idea of what’s going on.? The SX-62 was designed for superb audio fidelity – in fact it has 6V6 push-pull audio and a R-42 bass-reflex speaker came with this model.? A recap, which you have done, will almost certainly bring on the need for a thorough re-alignment. ? 73 – Steve, KW4H ? From:
<[email protected]> on behalf of Scott Petersen <s-petersen@...> ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...> ? Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in. |
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Re: SX-62 FM respons
开云体育An SX-62 is on my short list to acquire and restore.? Until that happens, the only info I have is anecdotal and from research on the model. ? 73 – Steve, KW4H ? From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? I have replaced them in 1 of the 2 62's. I First bought a SX-62(kind of a wreck), recapped it, and it performed well except for FM audio, I then recapped the discriminator , and re adjusted it per the alignment instructions, but it didn't really help, so I found a 62A and it performed pretty much the same way, after recapping except for the discriminator, which I didn't do yet (because on the last one it didn't help) at that point I became annoyed with it, and shelved it for another day. I would really like to know if someone has listened to one working correctly, and their opinion of the sound. I will be retiring this year, then it will be back on the bench. ? From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 10:28 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ? Well – some other things to try first, then.? The SX-62 is notorious for bad micas, and if not done yet you should replace every mica in the FM discriminator transformer.? FM performance will be impacted by even the smallest of leaks in those caps.? Were those replaced already? ? 73 – Steve, KW4H ? From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? I don't have a sweep generator, or spectrum analyzer I have an oscilloscope, standard rf signal generator, many different volt meters. From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...> ? Do you have the gear to do a sweep alignment?? Ideally and if available, use a spectrum analyzer with a tracking generator so you can visualize the FM IF and have a better idea of what’s going on.? The SX-62 was designed for superb audio fidelity – in fact it has 6V6 push-pull audio and a R-42 bass-reflex speaker came with this model.? A recap, which you have done, will almost certainly bring on the need for a thorough re-alignment. ? 73 – Steve, KW4H ? From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...> ? Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in. |
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Re: SX-62 FM respons
开云体育I have replaced them in 1 of the 2 62's. I First bought a SX-62(kind of
a wreck), recapped it, and it performed well except for FM audio, I then recapped the discriminator , and re adjusted it per the alignment instructions, but it didn't really help, so I found a 62A and it performed pretty much the same way, after recapping
except for the discriminator, which I didn't do yet (because on the last one it didn't help) at that point I became annoyed with it, and shelved it for another day. I would really like to know if someone has listened to one working correctly, and their opinion
of the sound.
I will be retiring this year, then it will be back on the bench.
From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 10:28 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Well – some other things to try first, then.? The SX-62 is notorious for bad micas, and if not done yet you should replace every mica in the FM discriminator transformer.? FM performance will be impacted by even the smallest of leaks in those caps.? Were those replaced already? ? 73 – Steve, KW4H ?
From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? I don't have a sweep generator, or spectrum analyzer I have an oscilloscope, standard rf signal generator, many different volt meters.
From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...> ? Do you have the gear to do a sweep alignment?? Ideally and if available, use a spectrum analyzer with a tracking generator so you can visualize the FM IF and have a better idea of what’s going on.? The SX-62 was designed for superb audio fidelity – in fact it has 6V6 push-pull audio and a R-42 bass-reflex speaker came with this model.? A recap, which you have done, will almost certainly bring on the need for a thorough re-alignment. ? 73 – Steve, KW4H ?
From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine
From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...> ?
Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in.
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Re: SX-62 FM respons
开云体育Well – some other things to try first, then.? The SX-62 is notorious for bad micas, and if not done yet you should replace every mica in the FM discriminator transformer.? FM performance will be impacted by even the smallest of leaks in those caps.? Were those replaced already? ? 73 – Steve, KW4H ? From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? I don't have a sweep generator, or spectrum analyzer I have an oscilloscope, standard rf signal generator, many different volt meters. From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 8:34 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ? Do you have the gear to do a sweep alignment?? Ideally and if available, use a spectrum analyzer with a tracking generator so you can visualize the FM IF and have a better idea of what’s going on.? The SX-62 was designed for superb audio fidelity – in fact it has 6V6 push-pull audio and a R-42 bass-reflex speaker came with this model.? A recap, which you have done, will almost certainly bring on the need for a thorough re-alignment. ? 73 – Steve, KW4H ? From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...> ? Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in. |
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Re: SX-62 FM respons
开云体育I don't have a sweep generator, or spectrum analyzer I have an oscilloscope, standard rf signal
generator, many different volt meters.
From: [email protected] <[email protected]> on behalf of KW4H via groups.io <reedsteve@...>
Sent: Monday, January 16, 2023 8:34 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Do you have the gear to do a sweep alignment?? Ideally and if available, use a spectrum analyzer with a tracking generator so you can visualize the FM IF and have a better idea of what’s going on.? The SX-62 was designed for superb audio fidelity – in fact it has 6V6 push-pull audio and a R-42 bass-reflex speaker came with this model.? A recap, which you have done, will almost certainly bring on the need for a thorough re-alignment. ? 73 – Steve, KW4H ? From:
<[email protected]> on behalf of Scott Petersen <s-petersen@...> ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...> ? Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in. |
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Re: SX-62 FM respons
开云体育On 1 unit I replaced them, the other I did not, I forgot which one
From: [email protected] <[email protected]> on behalf of F. Hottinger <hottinger@...>
Sent: Monday, January 16, 2023 5:55 AM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ?
Are the mica capacitors in the T27 (FM discriminator C93,C94,C95,C96) replaced? This could be that failure. ?
Von: [email protected] <[email protected]>
Im Auftrag von Scott Petersen ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine
From:
[email protected] <[email protected]> on behalf of don Root <drootofallevil@...> ?
Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in.
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Re: SX-62 FM respons
开云体育Do you have the gear to do a sweep alignment?? Ideally and if available, use a spectrum analyzer with a tracking generator so you can visualize the FM IF and have a better idea of what’s going on.? The SX-62 was designed for superb audio fidelity – in fact it has 6V6 push-pull audio and a R-42 bass-reflex speaker came with this model.? A recap, which you have done, will almost certainly bring on the need for a thorough re-alignment. ? 73 – Steve, KW4H ? From: <[email protected]> on behalf of Scott Petersen <s-petersen@...> ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...>
Sent: Sunday, January 15, 2023 8:22 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ? Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in. |
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Re: SX-62 FM respons
开云体育The Mica's in the IF transformers should also be changed! ? Von: [email protected] <[email protected]> Im Auftrag von Scott Petersen ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...>
Sent: Sunday, January 15, 2023 8:22 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ? Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in. |
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Re: SX-62 FM respons
开云体育Are the mica capacitors in the T27 (FM discriminator C93,C94,C95,C96) replaced? This could be that failure. ? Von: [email protected] <[email protected]> Im Auftrag von Scott Petersen ? It has been recapped, and seems to receive well on both AM and FM, but audio quality is poor on FM broadcast on all stations. Have tried to improve the FM alignment, and have not had any improvement. All tubes have been checked good,and swapped between both radios 62 ans 62A? Audio on AM seems fine From: [email protected] <[email protected]> on behalf of don Root <drootofallevil@...>
Sent: Sunday, January 15, 2023 8:22 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] SX-62 FM respons ? Scott: your 62 could need alignment as Steve said, or maybe some tubes, caps etc are tired? you didn't say what state it is in. |
don Root
waltcates