Re: general question re polarized ac plugs on receivers as shipped originally
In the 1960's, CAP Comms units were issued a large number of PE-75s.? They had a Briggs/S engine and would put out 2.5kw 24/7.? The manual showed the gen connected to 3 or 4 GI gas cans interconnected and were used to power a remote radio relay site, it appeared. The PE-75 has a fuel pump. They were a very reliable genset that 4 could carry via a sedan chair arrangement. Nuff said......
Jeep K3HVG
On 01/12/2023 9:26 PM don Root <drootofallevil@...> wrote:
On Thu, Jan 12, 2023 at 01:54 PM, dcc98_05 wrote:
Over the years have seen some very creative wiring in houses!! To save wire only run a hot wire to a bathroom for lights then hook to a metal water pipe for a neutral to make it work. Older houses with a fuse box with both hot an neutral with a fuse. So when you measure from the hot or (neutral) to ground you get 60 volts AC. The house I grew up in was wired like this. Have a Army generator from 1952? model PE75 that has the 60 volts to ground on both pins. The design dates from 1936 and was used until the mid 70s. the outlet was 2 pin twist lock. ?
HI?? dcc98 and any others?
RE:? “creative wiring in houses……..” ???interesting, anything was possible in the days of the wild west,
some of the next is said in hindsight, after some sleuthing..and assumptions about how you got this info.. so please forgive me if I am missing something.
?
RE: Older houses with a fuse box with both hot an neutral with a fuse. …” .. I wonder …or maybe.. 2 hot lines and an unseen gnded-neutral? are you sure what really enters the house?
RE: So when you measure from the hot or (neutral) to ground you get 60 volts AC. ??….. I wonder … see measurements and DMMs below.?
RE: ??“驳别苍别谤补迟辞谤 ??has the 60 volts to ground on both pins” ….. I wonder again? see capture of the manual…and ?see measurements and DMMs below.
Your situation tweaked my curiosity.. anything was possible, but I wonder just where and how these voltages are/were determined…?
You said ?“….you measure from the hot or (neutral) to ground you get 60 volts AC.” --- I will quibble about “ground”.. what/where is? “ground”.. is it really ground= grounded ..or is just a should-be ground?
?
Also, these Hi Z? ?DMM ?meters can badly fool anyone as the ?capacitive coupling in the wire and/or slight dielectric leakage? becomes real voltage/power ?to the meter, so if voltages are from one of those
?
The generator info i found is that it is 110vac,? without comment on possible 60-60 split, or neutral, or ground
I can only guess that the generator neutral is not grounded.. to the frame
?
as Steve often says “the plot thickens”... have a look at this
73 don? VA3DRL
??
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Re: SX-71 frequency shift
The two best candidates are: 1 a microphonic tube,
2 a microphonic I.F. can. It could be as simple as reseating the tubes.? Just about every part and solder connection in the radio can become microphonic. Open it up and tap around with a plastic tuning tool or small wooden dowel.
?Walt Cates,
WD0GOF
?
Your past has no control over your future. Only your NOW can impact your future.
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Re: SX-71 frequency shift
I am not specifically fsmiar with the SX-71 but this seems excessive. Certainly mechanical. Could be the oscillator tube? or more likely something loose.? Check the tuning cap and tube by tapping around with the eraser end of a pencil.? Can also be a cold solder joint or even an unsoldered joint. Also look for cracked resistors.? Have you already cleaned the band switch and cap wipers??? ? ?Is this a new problem?? Does it jump in SSB?? Should be the same in both modes.? It's probably doing it in AM but will be harder to hear.
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-------- Original message -------- From: John Green <radio1956@...> Date: 1/12/23 7:54 PM (GMT-08:00) Subject: [HallicraftersRadios] SX-71 frequency shift
The SX-71 I am working on is tuned up and operating fine. However, when operating cw, the frequency shifts as much as 400 Hertz if the table is bumped or radio tapped.
Even after good warm up and drift stabilizes, shift is readily induced.
Any suggestions for fix much appreciated.
Best 73, John, kx4p?
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Re: SX-71 frequency shift
I am not specifically fsmiar with the SX-71 but this seems excessive. Certainly mechanical. Could be the oscillator tube? or more likely something loose.? Check the tuning cap and tube by tapping around with the eraser end of a pencil.? Can also be a cold solder joint or even an unsoldered joint. Also look for cracked resistors.? Have you already cleaned the band switch and cap wipers??? ? ?Is this a new problem?? Does it jump in SSB?? Should be the same in both modes.? It's probably doing it in AM but will be harder to hear.
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-------- Original message -------- From: John Green <radio1956@...> Date: 1/12/23 7:54 PM (GMT-08:00) Subject: [HallicraftersRadios] SX-71 frequency shift
The SX-71 I am working on is tuned up and operating fine. However, when operating cw, the frequency shifts as much as 400 Hertz if the table is bumped or radio tapped.
Even after good warm up and drift stabilizes, shift is readily induced.
Any suggestions for fix much appreciated.
Best 73, John, kx4p?
|
The SX-71 I am working on is tuned up and operating fine. However, when operating cw, the frequency shifts as much as 400 Hertz if the table is bumped or radio tapped.
Even after good warm up and drift stabilizes, shift is readily induced.
Any suggestions for fix much appreciated.
Best 73, John, kx4p?
|
Re: general question re polarized ac plugs on receivers as shipped originally
On Thu, Jan 12, 2023 at 01:54 PM, dcc98_05 wrote:
Over the years have seen some very creative wiring in houses!! To save wire only run a hot wire to a bathroom for lights then hook to a metal water pipe for a neutral to make it work. Older houses with a fuse box with both hot an neutral with a fuse. So when you measure from the hot or (neutral) to ground you get 60 volts AC. The house I grew up in was wired like this. Have a Army generator from 1952? model PE75 that has the 60 volts to ground on both pins. The design dates from 1936 and was used until the mid 70s. the outlet was 2 pin twist lock. ?
HI?? dcc98 and any others?
RE:? “creative wiring in houses……..” ???interesting, anything was possible in the days of the wild west,
some of the next is said in hindsight, after some sleuthing..and assumptions about how you got this info.. so please forgive me if I am missing something.
?
RE: Older houses with a fuse box with both hot an neutral with a fuse. …” .. I wonder …or maybe.. 2 hot lines and an unseen gnded-neutral? are you sure what really enters the house?
RE: So when you measure from the hot or (neutral) to ground you get 60 volts AC. ??….. I wonder … see measurements and DMMs below.?
RE: ??“驳别苍别谤补迟辞谤 ??has the 60 volts to ground on both pins” ….. I wonder again? see capture of the manual…and ?see measurements and DMMs below.
Your situation tweaked my curiosity.. anything was possible, but I wonder just where and how these voltages are/were determined…?
You said ?“….you measure from the hot or (neutral) to ground you get 60 volts AC.” --- I will quibble about “ground”.. what/where is? “ground”.. is it really ground= grounded ..or is just a should-be ground?
?
Also, these Hi Z? ?DMM ?meters can badly fool anyone as the ?capacitive coupling in the wire and/or slight dielectric leakage? becomes real voltage/power ?to the meter, so if voltages are from one of those
?
The generator info i found is that it is 110vac,? without comment on possible 60-60 split, or neutral, or ground
I can only guess that the generator neutral is not grounded.. to the frame
?
as Steve often says “the plot thickens”... have a look at this
73 don? VA3DRL
??
|
The service bulletin fir the S-40a says that a field coil speaker was used in the first 1000 units. A PM speaker was used in subsequent production.? I compared the part number with the S-20R, they are different.? I thought perhaps they were using up surplus stock.
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Re: general question re polarized ac plugs on receivers as shipped originally
Over the years have seen some very creative wiring in houses!! To save wire only run a hot wire to a bathroom for lights then hook to a metal water pipe for a neutral to make it work. Older houses with a fuse box with both hot an neutral with a fuse. So when you measure from the hot or (neutral) to ground you get 60 volts AC. The house I grew up in was wired like this. Have a Army generator from 1952? model PE75 that has the 60 volts to ground on both pins. The design dates from 1936 and was used until the mid 70s. the outlet was 2 pin twist lock. ?
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Re: SX-62 Front Panel Paint
That is right,,, they can match the color not the texture.? The "blob" texture
of the SR series is a good example and some of the old textured and wrinkle finishes take a little creativity to duplicate.
FORTUNATELY,, the SX-62 front panel does not fall into that category.
?Walt Cates,
WD0GOF
?
Your past has no control over your future. Only your NOW can impact your future.
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On Thu, Jan 12, 2023 at 07:23 AM, waltcates wrote:
If all else fails, try Sherwin-Williams paint stores. Clean your panel with soap and water. Then take to S/W, they can scan several spots on the panel and mix an exact match.?
listening in with interest. Paint stors can match the color, but what about the matt-gloss characteristics and maybe what works on metal... Matching paint always seems tricky.
73? don VA3DRL
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Re: SX-62 Front Panel Paint
On Thu, Jan 12, 2023 at 07:23 AM, waltcates wrote:
If all else fails, try Sherwin-Williams paint stores. Clean your panel with soap and water. Then take to S/W, they can scan several spots on the panel and mix an exact match.?
listening in with interest. Paint stors can match the color, but what about the matt-gloss characteristics and maybe what works on metal... Matching paint always seems tricky. 73? don VA3DRL
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Re: SX-62 Front Panel Paint
Chris,
If all else fails, try Sherwin-Williams paint stores.
Clean your panel with soap and water. Then take to S/W, they can scan several spots on the panel and mix an exact match.?
?Walt Cates,
WD0GOF
?
Your past has no control over your future. Only your NOW can impact your future.
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Hello.? I'm new here.? I'm rebuilding a first run SX-62 with all the loctal tubes in the IF chain.? Anyway, I am going to repaint and re-letter the face due to it being scratched up.? Can anyone give me an idea what color gray the face is?? It looks to
me to be like Navy haze gray or some variation of it.? If anyone can point me to something that is close in a spray can, I'd appreciate it.? I don't have anywhere around that can color match without having to drive 3+ hours so something from the local Ace
or Lowes will have to do.
Thanks
Chris
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Re: SX-62 Front Panel Paint
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Hello.? I'm new here.? I'm rebuilding a first run SX-62 with all the loctal tubes in the IF chain.? Anyway, I am going to repaint and re-letter the face due to it being scratched up.? Can anyone give me an idea what color gray the face is?? It looks to me to be like Navy haze gray or some variation of it.? If anyone can point me to something that is close in a spray can, I'd appreciate it.? I don't have anywhere around that can color match without having to drive 3+ hours so something from the local Ace or Lowes will have to do.
Thanks
Chris
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Re: S-40B - What is the socket on the back for?
I have to look at the schematics but it seems to me the S-40 has an electrodynamic speaker, at least in early versions but the S-40A has a PM speaker with a 1K resistor in place of the field coil. The S-20R has a field coil speaker. Field coil speakers? were very common until after WW-2.? Good magnets were expensive plus the field coil served as a filter choke.
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-------- Original message -------- From: don Root <drootofallevil@...> Date: 1/11/23 2:22 PM (GMT-08:00) Subject: Re: [HallicraftersRadios] S-40B - What is the socket on the back for?
Hello Craig and group
While scouring the www for info I ran across this link re the ?S-40A and B
It seems that much of it is from Riders.
who knows what run[s] it represents.
Again I don’t know what to believe … for the 40B,? the writing says it has PM speaker, but the schematic shows an electro-dynamic? .. did it maybe change in mid-run?
?
Plug for S-meter ?and DC power is shown in the S-40A , but not the B , as most people believe to be true.
The last page partly applies to the Halli S-40's … if you are working on one, you may want to read it.?
73 don VA3DRL
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Re: S-40B - What is the socket on the back for?
Interesting discussion guys but its going on 3 pages now.
Maybe its time to start a new discussion if you don't mind.
K2WH
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Re: SR-400 Cyclone VOX problem
Greetings to Walt and the Group:
I have the voltages for V20 as requested.?? Here is your table combined with the actual measured voltages.
?? The only thing remaining on the grid side of V2B that has not been replaced or checked is the anti-trip circuit.?? I will be looking here next, I guess.?? Any other suggestions welcome.
Thanks and 73,
Jim T.
KB6GM
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FYI S-22 interesting note re grounding
note FOUND ON THE?? S-22 schematic
the schematic shows terminal G internally wired thru a cap to chassis
73 don VA3DRL
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Re: S-40B - What is the socket on the back for?
That’s a S-210.? Made from ’67 to ’69. ? 73 – Steve, KW4H ? OK, you are right, not a 120a, but I forget what it was now.? Here's a quick clip after I rebuilt the filter cap and tweaked things a little.? I bet someone knows?the correct model number.
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Re: S-40B - What is the socket on the back for?
On Wed, Jan 11, 2023 at 01:37 PM, KW4H wrote:
A moment of humor:? at some point this becomes kind of like examining belly button lint.? When we look back over the decades at some of these designs, we’re looking almost entirely from an engineering/technical perspective – because that’s really all we’ve got.? But the actual truth may lie in something a little more difficult to calculate:? the need for these companies to make a profit, and management driving (or interfering in) engineering decisions.? It could have gone something like this:
“We’ve got 500 pre-punched chassis with an extra hole for a feature we didn’t implement – get the summer hires to cover them up!”
Then, 60 years later, we’re looking at these radios like time capsules and can’t figure out why that extra hole is there with the cover plate.
?
73 – Steve, KW4H
Hello again Steve, Craig and group
? Glad you injected this Steve. I have often wanted to say something similar. I worked in and out of a factory for a while, and like halli , parts came in with unexpected variations over time.. ---Ya it is a 50 ohm, 2 watt, but this one wont fit in that spot .. now what?? or --- we just ran short/the bin is empty...now what? or --- the supplier of unique part burnt down or went under.. now what?....? or --- ya, the draftsman changed the schematic, not the wiring drawing, and we use the wiring dwg to build the stuff. or --- we have been building this that way for 2 years.. what? somebody changed something? --- newbie... what's polarity?, resistors have 2 wires, so do those condensers! --- this pot has 4 terminals for 3 wires --- whats cold solder?, i burnt my fingers on it --- hey man, its Friday afternoon! --- the engineer to the draftsman ..."just copy the S-40, and change model number, remove the If stage, add an RF stage,fix up the frequency stuff and lets go , the test department can fix anything on the weekend" --- the draftsman to the engineer "ya so fix-up tne S-49 today, and the sx-88 can wait.... til i get back from vacation??"
73 don VA3DRL
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Re: S-40B - What is the socket on the back for?
OK, you are right, not a 120a, but I forget what it was now.? Here's a quick clip after I rebuilt the filter cap and tweaked things a little.? I bet someone knows?the correct model number.
Trent
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waltcates
don Root
Bill (Group Owner)
Trent N4DTF EM55