Re: Dust Cover for my SX-17
Very nice.? Seems to me that a matching cover for the speaker? Would also be nice.??
toggle quoted message
Show quoted text
-------- Original message -------- From: "Bill (Group Owner)" <k2wh@...> Date: 11/5/22 12:40 PM (GMT-08:00) Subject: [HallicraftersRadios] Dust Cover for my SX-17
Just received my special protective dust cover for my SX-17, Nice. ?
K2WH
|
Just received my special protective dust cover for my SX-17, Nice.
?
K2WH
|
Re: ISO HT-45 and power supply
?
Hi Sam , good job on finding the HT45. I am curious what ball park figure they sell for?
There is one locally here being sold , it’s in pretty rough shape and both the seller and I dont know what a reasonable price should be. I don’t see any eBay sales.
It has an unmarked power supply with it.
We don’t want to cheat ourselves or each other. No idea if it works.
Tim
On Fri, Jul 15, 2022 at 03:27 AM, Sam B wrote:
Hi everyone, I know its a bit of a longshot. I'm looking for a HT-45 to go with my SX-117 and HT-44 set that I recently got on the air. I haven’t had any luck finding any for sale. After looking online for several months I though that if anyone would know of one out there it would be someone in this group. Thanks in advance and? 73.
|
Re: What's Old, is New Again - Hallicrafters SX-17 & FT8
Same here whenever I see your calls on here or I believe on FT8. BTW, want real? dyslexia, I worked stations with the following calls:
- W2WH
- K4WH
- W2KH
- K2HW
K2WH
|
I still sm not clear on a couple of things.? Is the double peak on one station only?? And secondly how are you seeing it?? I thought the 62 does not have a tuning indicator, am I wrong?? ?A problem with the IF or detector should show up on all stations.? If this appears on one station it is something else ?
toggle quoted message
Show quoted text
-------- Original message -------- From: don Root <drootofallevil@...> Date: 11/4/22 1:35 PM (GMT-08:00) Subject: Re: [HallicraftersRadios] SX-62 FM respons
Scott and others
I am sticking with my first guess for now --two peaks on the IF [ If response is not flat enough]? .. but I have no conviction on that.
i agree that SMD, even if it is possible in the 62? seems to be a remote possibility
I just ran across a? somewhat similar posting on some other? group? and? i would guess from that, it is hard to rule out repeaters until they are checked out in that area.?
-- now i just saw a new email from Joe? and after a few moments of thought, it could be that old caps change value a bit and UNTUNE the IF’s rather than fail shorted .. but that is still just one possibility. ? 73,, don?? VA3DRL ? ? I don't believe SMD affects the SX-62 or SX-71, as they have the larger IF transformers that came before the miniature transformers with the Mica caps built in the base.
Joe; i guess you are speaking of SMD [silver mica disease] that apparently seems to make them erratic and then die shorted out and is common in many 455 kH IF transformers for AM etc.? The original posting mentioned only the one station and that it came in at two frequencies, so we don't have much to go on.
73 DON ? VA3DRL
|
Scott and others
I am sticking with my first guess for now --two peaks on the IF [ If response is not flat enough]? .. but I have no conviction on that.
i agree that SMD, even if it is possible in the 62? seems to be a remote possibility
I just ran across a? somewhat similar posting on some other? group? and? i would guess from that, it is hard to rule out repeaters until they are checked out in that area.?
-- now i just saw a new email from Joe? and after a few moments of thought, it could be that old caps change value a bit and UNTUNE the IF’s rather than fail shorted .. but that is still just one possibility. ? 73,, don?? VA3DRL ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Scott Petersen
Sent: Friday, November 4, 2022 3:02 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] SX-62 FM respons? I don't believe SMD affects the SX-62 or SX-71, as they have the larger IF transformers that came before the miniature transformers with the Mica caps built in the base.
Joe; i guess you are speaking of SMD [silver mica disease] that apparently seems to make them erratic and then die shorted out and is common in many 455 kH IF transformers for AM etc.? The original posting mentioned only the one station and that it came in at two frequencies, so we don't have much to go on.
73 DON ? VA3DRL
|
Scott, you're right that the SX-62 doesn't have the IF cans susceptible to SMD, but I believe the problem is plain old leakage, not SMD. I'm sure there's information on this on the various boatanchor forums. I remember reading it when I worked on my SX-62.?
? ? ? ? ? ? ? ? ? ? ? ? ? ? Joe?
On Friday, November 4, 2022 at 03:02:11 PM EDT, Scott Petersen <s-petersen@...> wrote:
I don't believe SMD affects the SX-62 or SX-71, as they have the larger IF transformers that came before the miniature transformers with the Mica caps built in the base.
Joe; i guess you are speaking of SMD [silver mica disease] that apparently seems to make them erratic and then die shorted out and is common in many 455 kH IF transformers for AM etc.? The original posting mentioned only the one station and that it came
in at two frequencies, so we don't have much to go on.
73 DON ? VA3DRL
|
I don't believe SMD affects the SX-62 or SX-71, as they have the larger IF transformers that came before the miniature transformers with the Mica caps built in the base.
toggle quoted message
Show quoted text
Joe; i guess you are speaking of SMD [silver mica disease] that apparently seems to make them erratic and then die shorted out and is common in many 455 kH IF transformers for AM etc.? The original posting mentioned only the one station and that it came
in at two frequencies, so we don't have much to go on.
73 DON ? VA3DRL
|
Joe; i guess you are speaking of SMD [silver mica disease] that apparently seems to make them erratic and then die shorted out and is common in many 455 kH IF transformers for AM etc.? The original posting mentioned only the one station and that it came in at two frequencies, so we don't have much to go on.
73 DON ? VA3DRL
|
I seem to recall that there's a chronic problem with bad mica caps inside the FM discriminator can. If I remember correctly, those caps can cause all kinds of strange problems with FM performance.
? ? ? ? ? ? ? ? ? ? ? ?Joe Connor
On Friday, November 4, 2022 at 12:47:29 PM EDT, don Root <drootofallevil@...> wrote:
Skip:? Its too bad that you didn't get more response from others; i seem to recall this sort of thing on an EICO HFT-90 FM tuner [1959], and /or a Heathkit AR-15 stereo receiver [1969], but have no details, and did no investigation, just noted it and listened on one or the other. I still have the Heath..In sick bay, but the EICO sadly vanished long ago. Both were home built.
don VA3DRL
|
Skip:? Its too bad that you didn't get more response from others; i seem to recall this sort of thing on an EICO HFT-90 FM tuner [1959], and /or a Heathkit AR-15 stereo receiver [1969], but have no details, and did no investigation, just noted it and listened on one or the other. I still have the Heath..In sick bay, but the EICO sadly vanished long ago. Both were home built.
don VA3DRL
|
Re: SX-110 Crystal Instability
Steve;? thanks for the clarification. I am only inquisitive now… Its driving me nuts too .. ? As I see it, you have a generator that really wants its frequency to be ?“the frequency” and a crystal that? wants to control the frequency. Is the generator really the Master and the crystal the slave, or can they be fighting?? One would not expect that the crystal could budge the generator, but who knows if the crystal can kick back somehow, maybe. I haven’t got that question quite right, and it is Just a lingering thought that I mull over. Your www reference on your new thread is interesting, but gonna take time for me to digest. Keep us updated Steve. Thanks 73 --Don VA3DRL ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KW4H via groups.io
Sent: Thursday, November 3, 2022 9:31 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] SX-110 Crystal Instability? Don, ? The frequency will jump suddenly from A to B and then settle on that for a bit.? The changes aren’t slow. ? 73 – Steve, KW4H ? I’m still curious; does the frequency jump suddenly from A to B, or does it ?settle for a bit on a variety of frequencies? or is it a slow change? Don VA3DRL ? ? An update.? I just did another crystal alignment and yet again found the right spot and re-confirmed the crystal oscillator frequency null is at 453.410 KHz.? However, there is no doubt that merely tapping on the crystal – even a tiny bit – causes the null point to noticeably change when the crystal is in use.? Now – to be realistic – that’s what the crystal phasing control is for, and it won’t end up in exactly the same place every time.? If it shifts a little, the phasing control ends up in a different position when you adjust it.? So, for a receiver this old – meh – and probably no one cared back then at this price point.? Nevertheless, I’m going to try replacing the crystal with one that doesn’t jiggle.? Just because. ? 73 – Steve, KW4H ? Perfect. WB4GRA ? On Nov 3, 2022, at 3:46 PM, Jacques_VE2JFE <jacques.f@...> wrote:
? Hi Dan, You wrote: But a loose mounted crystal wafer rattling about and being OK isn't an intuitive conclusion. Like to learn more about that. There is several examples of old radios using a “loose resonator crystal”. The old models of HRO use a plug-in crystal that “rattle” when you shake the holder. Another fairly well explained case is here: Go half-way down the page. ? 73, Jacques, VE2JFE in Montreal
|
Re: SX-110 Crystal Instability
Thanks, Richard.? I’ve opened the holder twice – cleaned everything (it wasn’t dirty, though), and carefully reassembled.? I think it’s just an old design and was considered “good enough”. ? 73 – Steve, KW4H ? FWIW i opened the filter compartment of my HQ 129 X? the crystal is in a holder similar to the one pictured in the SX110.? Itried tapping it.? Did not change frequency or have any effect on the phasing control.? as mentioned before the same ki d of holder is used in the RCA AR 88 . I have tapped that one too and found it made a slight noise but didn't seem to change its frequency. I think it's possible the electrodes may be a little loose.? The change in capacitance word affect the phasing control.
toggle quoted message
Show quoted text
-------- Original message --------From: don Root <drootofallevil@...> Date: 11/3/22 5:31 PM (GMT-08:00) Subject: Re: [HallicraftersRadios] SX-110 Crystal Instability I’m still curious; does the frequency jump suddenly from A to B, or does it ?settle for a bit on a variety of frequencies? or is it a slow change? Don VA3DRL ? ? An update.? I just did another crystal alignment and yet again found the right spot and re-confirmed the crystal oscillator frequency null is at 453.410 KHz.? However, there is no doubt that merely tapping on the crystal – even a tiny bit – causes the null point to noticeably change when the crystal is in use.? Now – to be realistic – that’s what the crystal phasing control is for, and it won’t end up in exactly the same place every time.? If it shifts a little, the phasing control ends up in a different position when you adjust it.? So, for a receiver this old – meh – and probably no one cared back then at this price point.? Nevertheless, I’m going to try replacing the crystal with one that doesn’t jiggle.? Just because. ? 73 – Steve, KW4H ? Perfect. WB4GRA ? On Nov 3, 2022, at 3:46 PM, Jacques_VE2JFE <jacques.f@...> wrote:
? Hi Dan, You wrote: But a loose mounted crystal wafer rattling about and being OK isn't an intuitive conclusion. Like to learn more about that. There is several examples of old radios using a “loose resonator crystal”. The old models of HRO use a plug-in crystal that “rattle” when you shake the holder. Another fairly well explained case is here: Go half-way down the page. ? 73, Jacques, VE2JFE in Montreal
|
Re: SX-110 Crystal Instability
Don, ? The frequency will jump suddenly from A to B and then settle on that for a bit.? The changes aren’t slow. ? 73 – Steve, KW4H ? I’m still curious; does the frequency jump suddenly from A to B, or does it ?settle for a bit on a variety of frequencies? or is it a slow change? Don VA3DRL ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KW4H via groups.io
Sent: Thursday, November 3, 2022 4:42 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] SX-110 Crystal Instability? An update.? I just did another crystal alignment and yet again found the right spot and re-confirmed the crystal oscillator frequency null is at 453.410 KHz.? However, there is no doubt that merely tapping on the crystal – even a tiny bit – causes the null point to noticeably change when the crystal is in use.? Now – to be realistic – that’s what the crystal phasing control is for, and it won’t end up in exactly the same place every time.? If it shifts a little, the phasing control ends up in a different position when you adjust it.? So, for a receiver this old – meh – and probably no one cared back then at this price point.? Nevertheless, I’m going to try replacing the crystal with one that doesn’t jiggle.? Just because. ? 73 – Steve, KW4H ? Perfect. WB4GRA ? On Nov 3, 2022, at 3:46 PM, Jacques_VE2JFE <jacques.f@...> wrote:
? Hi Dan, You wrote: But a loose mounted crystal wafer rattling about and being OK isn't an intuitive conclusion. Like to learn more about that. There is several examples of old radios using a “loose resonator crystal”. The old models of HRO use a plug-in crystal that “rattle” when you shake the holder. Another fairly well explained case is here: Go half-way down the page. ? 73, Jacques, VE2JFE in Montreal
|
Re: SX-110 Crystal Instability
FWIW i opened the filter compartment of my HQ 129 X? the crystal is in a holder similar to the one pictured in the SX110.? Itried tapping it.? Did not change frequency or have any effect on the phasing control.? as mentioned before the same ki d of holder is used in the RCA AR 88 . I have tapped that one too and found it made a slight noise but didn't seem to change its frequency. I think it's possible the electrodes may be a little loose.? The change in capacitance word affect the phasing control.
toggle quoted message
Show quoted text
-------- Original message -------- From: don Root <drootofallevil@...> Date: 11/3/22 5:31 PM (GMT-08:00) Subject: Re: [HallicraftersRadios] SX-110 Crystal Instability
I’m still curious; does the frequency jump suddenly from A to B, or does it ?settle for a bit on a variety of frequencies? or is it a slow change? Don VA3DRL ? ? An update.? I just did another crystal alignment and yet again found the right spot and re-confirmed the crystal oscillator frequency null is at 453.410 KHz.? However, there is no doubt that merely tapping on the crystal – even a tiny bit – causes the null point to noticeably change when the crystal is in use.? Now – to be realistic – that’s what the crystal phasing control is for, and it won’t end up in exactly the same place every time.? If it shifts a little, the phasing control ends up in a different position when you adjust it.? So, for a receiver this old – meh – and probably no one cared back then at this price point.? Nevertheless, I’m going to try replacing the crystal with one that doesn’t jiggle.? Just because. ? 73 – Steve, KW4H ? Perfect. WB4GRA ? On Nov 3, 2022, at 3:46 PM, Jacques_VE2JFE <jacques.f@...> wrote:
? Hi Dan, You wrote: But a loose mounted crystal wafer rattling about and being OK isn't an intuitive conclusion. Like to learn more about that. There is several examples of old radios using a “loose resonator crystal”. The old models of HRO use a plug-in crystal that “rattle” when you shake the holder. Another fairly well explained case is here: Go half-way down the page. ? 73, Jacques, VE2JFE in Montreal
|
Re: SX-110 Crystal Instability
I’m still curious; does the frequency jump suddenly from A to B, or does it ?settle for a bit on a variety of frequencies? or is it a slow change? Don VA3DRL ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KW4H via groups.io
Sent: Thursday, November 3, 2022 4:42 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] SX-110 Crystal Instability? An update.? I just did another crystal alignment and yet again found the right spot and re-confirmed the crystal oscillator frequency null is at 453.410 KHz.? However, there is no doubt that merely tapping on the crystal – even a tiny bit – causes the null point to noticeably change when the crystal is in use.? Now – to be realistic – that’s what the crystal phasing control is for, and it won’t end up in exactly the same place every time.? If it shifts a little, the phasing control ends up in a different position when you adjust it.? So, for a receiver this old – meh – and probably no one cared back then at this price point.? Nevertheless, I’m going to try replacing the crystal with one that doesn’t jiggle.? Just because. ? 73 – Steve, KW4H ? Perfect. WB4GRA ? On Nov 3, 2022, at 3:46 PM, Jacques_VE2JFE <jacques.f@...> wrote:
? Hi Dan, You wrote: But a loose mounted crystal wafer rattling about and being OK isn't an intuitive conclusion. Like to learn more about that. There is several examples of old radios using a “loose resonator crystal”. The old models of HRO use a plug-in crystal that “rattle” when you shake the holder. Another fairly well explained case is here: Go half-way down the page. ? 73, Jacques, VE2JFE in Montreal
|
Re: What's Old, is New Again - Hallicrafters SX-17 & FT8
Steve ?it Took a bit of work for the old gray matter to digest your last comment, and i will ditto your first line. 73? Don VA3DRL ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KW4H via groups.io
Sent: Thursday, November 3, 2022 7:51 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] What's Old, is New Again - Hallicrafters SX-17 & FT8? Good luck to you both, please keep us posted! ? And by the way, Bill, whenever I see your callsign I get a bad case of dyslexia.? ? ? 73 – Steve, KW4H ? Good luck again and your enthusiasm is contagious.
K2WH
|
Re: What's Old, is New Again - Hallicrafters SX-17 & FT8
Good luck to you both, please keep us posted! ? And by the way, Bill, whenever I see your callsign I get a bad case of dyslexia.? ? ? 73 – Steve, KW4H ? Good luck again and your enthusiasm is contagious.
K2WH
|
Re: What's Old, is New Again - Hallicrafters SX-17 & FT8
Good luck again and your enthusiasm is contagious.
K2WH
|
Re: What's Old, is New Again - Hallicrafters SX-17 & FT8
That's really interesting, Bill.
I'd never even thought about that, but what a brilliant way to check on local oscillator drift!
I really must get on with my SX16 restoration but it's going to be a long process. I've got
capacitors from Hayseed, all the tubes, decals from RadioDaze - just need to find the time
(and transformers!) and make some space in the shack/workshop to get started...
73 de Peter, G4ADJ
?
|
Bill (Group Owner)
don Root