Re: SX-115 signals lower on USB than LSB
Beautiful Station... 73 WA3GIN
Twenty-six years ago I collected the components for a classic Hallicrafters station.? The HT-33A amplifier was sold before I moved cross-country in 2020 (just too heavy) but I finally got around to putting the station together a few weeks ago.? The SX-88, SX-115 and HT-32B are all original - and with just cleaning the switches/pots and checking the tubes, work great.? The HT-32B is putting out 90 watts, and with a Turner 350D HI mic, gets good audio reports.
The only issue is USB signals on the SX-115 are noticeably weaker than on LSB by about 3 S-units.? Before I start digging in, has anyone on the list experienced a similar issue and knows how to resolve?
Thanks to all and Happy Holidays, de Norm - WA3KEY
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SX-115 signals lower on USB than LSB
Twenty-six years ago I collected the components for a classic Hallicrafters station. ?The HT-33A amplifier was sold before I moved cross-country in 2020 (just too heavy) but I finally got around to putting the station together a few weeks ago. ?The SX-88, SX-115 and HT-32B are all original - and with just cleaning the switches/pots and checking the tubes, work great. ?The HT-32B is putting out 90 watts, and with a Turner 350D HI mic, gets good audio reports.
The only issue is USB signals on the SX-115 are noticeably weaker than on LSB by about 3 S-units. ?Before I start digging in, has anyone on the list experienced a similar issue and knows how to resolve?
Thanks to all and Happy Holidays, de Norm - WA3KEY
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1648.550KHz LSB XTAL FOR SR2000
Anyone out there have a LSB carrier xtal 1648.550KHz they would part with. And yes, I have already checked with AF4K and several other sites, no joy.
Walt Cates, WD0GOF
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A majority of acceptance is not proof of correctness.
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WANTED: Radio Repair Technician
Hello all,
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I am posting this want ad for my Elmer and employer, Kevin, WA6HUL.
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Thanks,
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Lyman Lew
KK6LPW
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WANTED: Radio Repair Technician
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Radio repair technician, tube era ham equipment and vintage broadcast receivers. Shop in west Torrance in the Los Angeles south bay area. Full time? or part time, flexible hours. Ideal for semi-retired or student. Some experience needed, licensed ham preferred. wa6hul@..., 310-658-9289
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I apologize for coming back here and begging for help with yet another thorny HT-46 problem, but I am at wits end. The VFO drift problem is solved and now I am addressing the chirpy CW note.
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I listened to the VFO with a general coverage receiver and hear little or no frequency change at key down, but I don’t know where else the chirp could be coming from. ?I’m testing on 80M so the heterodyne oscillator is out of play. I have listened to the carrier oscillator and it does not vary. Perhaps most telling is that when I transmit using the SX-146 receiver VFO in slave mode, there is no chirp.
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I thought VFO screen voltage might be the problem but I changed the OA2 with a NOS tube and that didn’t help. I even built up a solid state screen voltage regulator and installed it in place of the screen resistor. Screen voltage is now rock solid but there was little or no improvement in the chirp.
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To demonstrate the problem I attached an audio clip from a WEB SDR where I transmitted using the receiver VFO and then using the transmitter VFO. I don’t know if Groups.io allows .wav attachments but it seemed to upload OK. Any suggestions are welcome.
73 – Jerry – W0PWE
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You are very fortunate. Yes, that was the standard back then so no worry. I never did get the Dow Key then as my lawn mowing money could not afford it. Built my own with? Potter Brumfield open frame relay in a mil surp relay box which I still have.
Ed, WA9GQK
On Wednesday, December 18, 2024 at 02:29:19 PM CST, Waldo Magnuson via groups.io <magnuson@...> wrote:
I generously received a 117 v Dow relay to connect my HT-44 and SX-117.
I’m now wondering if the relay contacts in the HT-44 (pins 2-3) control outlet connector are up to switching the 117 V to the Dow relay. Or should I look further for a 12 V Dow? Figure5 in the HT-44 manual shows the use of a 117 V relay.
Any concerns or am I overly concerned? Thanks.
Skip Magnuson W7WGM
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Yep. If you look at the 44/117 setup in the manual you will see they are using a 117vac relay. Figure 5 page 5 of the Hallicrafters manual.
Walt Cates, WD0GOF
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A majority of acceptance is not proof of correctness.
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I generously received a 117 v Dow relay to connect my HT-44 and SX-117.
I’m now wondering if the relay contacts in the HT-44 (pins 2-3) control outlet connector are up to switching the 117 V to the Dow relay. Or should I look further for a 12 V Dow? Figure5 in the HT-44 manual shows the use of a 117 V relay.
Any concerns or am I overly concerned? Thanks.
Skip Magnuson W7WGM
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I generously received a 117 v Dow relay to connect my HT-44 and SX-117.
I’m now wondering if the relay contacts in the HT-44 (pins 2-3) control outlet connector are up to switching the 117 V to the Dow relay. Or should I look further for a 12 V Dow? Figure5 in the HT-44 manual shows the use of a 117 V relay.
Any concerns or am I overly concerned? Thanks.
Skip Magnuson W7WGM
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Re: S-41G or W or Echophone EC-1A good picture of dial face
Bill,
I had not. I was not aware of those pixes. Thank you for the
reference.
There were a couple possibilities I'll try to work with. The
best photo of the S41G faceplate is a little cropped on the top
and bottom, as I do a print screen. But I'll see what I can do
with it, if no other options are forthwith.
Thanks again.
Ray, W4BYG
On 12/16/2024 20:24, Bill (Group Owner)
via groups.io wrote:
Have you looked at out image database ?
?
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You might be able to use those images.
K2WH
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"The world is desperate for a faith that combines two things: awestruck sight of unshakable divine Truth, and
utterly practical, round-the-clock power to make a liberating difference in life"... John Piper
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Re: S-41G or W or Echophone EC-1A good picture of dial face
Ray, Probably any original scales have ?similar problems? So someone would have to somehow reproduce the exact scale “paint scheme layout”. You did not mention any, scars, chipping, flaking; just fading so a well-diffused lit dead on photo [or a photo scanner] should capture all the printed details. That should leave only the “white” background to think about. So was the original 100% white or 98% ,90% or much less [who knows now]. Then there is the amount gloss, or semi-gloss, or matt ?to decide on. My though, from memory is scale backgrounds are not very glossy.. but that might depend on the intended illumination. However somebody may have done this already for the S-41, and at least have the exact prescription for the black markings. ?? I have one somewhere in hidden deep storage, but mine is a G, not a W. Remember to keep records, as we might be asking for advice once you are done. ? -- don??? va3drl
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Re: S-41G or W or Echophone EC-1A good picture of dial face
Just another suggestion: If the dial on your receiver is too far
gone to use as a basis for printing a new one perhaps someone on this
list can supply a suitable photo. Bill has referred you to the list
database, maybe one there. There are people who can generate a decal or
other method of renewing the dial printing. I would think with modern
digital methods this should be fairly easy or at least possible. There
are vendors who sell new dials for old radios, perhaps one can make a
new dial for this receiver.
I am reminded BTW, of the similarity of the S41 to the Echophone.
The S41W shown by another poster, is interesting looking. Don't
think I've ever seen the real thing. Not many receivers made in white
(actually I can't think of another) so I wonder what the intended market
was.
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On 12/16/2024 2:11 PM, Ray, W4BYG wrote: Never have found a source yet for a replacement dial face for my S41G.
This receiver works good and is in excellent physical condition except
for the faded dial face.
I wonder if anyone has a S41"W" model (white dial), or the Echophone
EC-1 with a good dial face that could be photographed such that I could
make a new dial face from an emailed attached photo?
It's not a premium radio of the past, but is in good enough condition to
try to improve the dial face.
I also have a good S-20R and a SX101 and a number of other "golden
oldies" to go with my "rice boxes".
Your assistance would be appreciated.
Ray, W4BYG
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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Re: S-41G or W or Echophone EC-1A good picture of dial face
Have you looked at out image database ?
?
?
You might be able to use those images.
K2WH
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S-41G or W or Echophone EC-1A good picture of dial face
Never have found a source yet
for a replacement dial face for my S41G. This receiver works
good and is in excellent physical condition except for the faded
dial face.
I wonder if anyone has a S41"W" model (white dial), or the
Echophone EC-1 with a good dial face that could be photographed
such that I could make a new dial face from an emailed attached
photo?
It's not a premium radio of the past, but is in good enough
condition to try to improve the dial face.
I also have a good S-20R and a SX101 and a number of other
"golden oldies" to go with my "rice boxes".
Your assistance would be appreciated.
Ray, W4BYG
--
"The world is desperate for a faith that combines two things: awestruck sight of unshakable divine Truth, and
utterly practical, round-the-clock power to make a liberating difference in life"... John Piper
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I know I'm late to the party, but the old Electronics Illustrated "Scrounger" 10 Watt 6V6 tube transmitter project (Link here: ) had a 1 transistor "keying Monitor" that one could make to monitor the CW tone. Just relaying in case in one would be interested.
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73, Gordon KJ6IKT
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Re: HT-44 Common Problem?
Yep - I read your document on the issues you ran across before starting any work on my receiver.? Oddly, all other resistors in my receiver were well within tolerance.? The guy I bought it from told me that he didn't think the SX-117 or HT-44 had ever been used.??
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73, Floyd
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Re: HT-44 Common Problem?
Hi Floyd,
Yep, my HT-44 also had a failed 22k resistor in that circuit.? It measured 568 ohms.? I replaced it and the others which weren't so far off.? At least one 1k and one 220 ohm resistor were also out of spec.? I replaced a lot of resistors in that circuit.? A prior owner had replaced the carrier balance potentiometer.? One of the 12BH7s had a bad section; replaced that too.? And a 12AX7 was bad...replaced.
One difference is that it didn't fail on my watch; I got it that way.
Cheers,
Halden VE7UTS
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Re: HT-44/SX-117 CW Offset Solution
Yes nice work.
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If you want can you send me a PDF of the circuit and I will put it on the site with credit to you.
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K2WH@...
K2WH
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Re: HT-44/SX-117 CW Offset Solution
Nice work, Floyd.?
Thanks!?
73
Jeff
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Re: HT-44 Common Problem?
I got some 3 watt 22k resistors from Amazon.? Slightly smaller than the original carbon 2 watt.? Will use them if the problem occurs again.
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I use noise-cancelling headphones much of the time on CW and a stand-alone generator could not be heard.??
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Dave Jordan
waltcates
whirligig
Ray, W4BYG
don Root
Bill (Group Owner)
Floyd - K8AC