Ronny, By experience it works with jpg¡¯ s ?probably png¡¯s ???but ?not tif¡¯s? and whoNose I have never seen any info on what? file types work.? ?don ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Ronny Julian
Sent: Sunday, June 16, 2024 8:56 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] Advice on begining? If you can't see the pics attached it is an SX-100.? Thanks! ? -- don??? va3drl
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Caveat - The HS Hamfest cans DO NOT always align their bottom lugs like
the originals...? If the space is tight, it can be a royal PITA to
"stretch" wires.? I gave up and redo my own... cut 'em open with a
Dremel saw, carefully unwind the "rollup" cap material, and VERY
carefully pry the soft aluminum section-straps from the foil... After
matching your new caps to the old layout, use the barrel-crimp end of
some crimp-on connectors (cut off the rest and discard)... crimp "half"
the barrel on the aluminum strap (THIS gives you something to solder
onto!!), match up the lead arrangement and length, and after they're
together, using some REAL diuct tape (the FOIL type), put the top back
on and you're done, save for resoldering.? Note:? Mark the halves before
disassembly, so they fit well.
Tom - W?E
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Check out their?website:? ?
They have a kit for your S-20R.? The multi-cap can is a little pricey, by but the time you make on your own the price is not to bad.
73
Jim Zellmer, KA0VSL
On Sun, Jun 16, 2024 at 9:18?PM John Watkins via <jpwatkins9= [email protected]> wrote: Finally getting around to my S-20R and was wondering if anyone knows if HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or email address for them.
Thanks, John WD5ENU
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Finally getting around to my S-20R and was wondering if anyone knows if HayseedHamfest does resistor kits?? Can¡¯t seem to find a phone number or email address for them.
Thanks, John WD5ENU
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If you can't see the pics attached it is an SX-100.? Thanks!
On Sun, Jun 16, 2024 at 7:29?PM Ronny Julian via <k4rjjradio= [email protected]> wrote: Let me start with a thanks for any advice.? I am greatly sight impaired and would love to see this radio working again.? I'm trying to get back to soldering but I've never worked on a tube rig before.? I got this yesterday and have an Octal plug on the way from Tubes n More.? I do not know much of the history on this.? Looking for advice on getting it back up.? If anyone is in central FL or nearby I'd like to talk to you about restoring it properly.? Pics attached.? Thanks!
Ronny? W4TRI
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Let me start with a thanks for any advice.? I am greatly sight impaired and would love to see this radio working again.? I'm trying to get back to soldering but I've never worked on a tube rig before.? I got this yesterday and have an Octal plug on the way from Tubes n More.? I do not know much of the history on this.? Looking for advice on getting it back up.? If anyone is in central FL or nearby I'd like to talk to you about restoring it properly.? Pics attached.? Thanks! Ronny? W4TRI
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SR2000 blower replacement
I used walts guid and ordered the Amazon motor.? I found an aluminum OD 1/4 threaded spacer at ACE.? Take the wheel with you.? I then drilled the center of the threads out to fit the 5/16 motor shaft. Insert into wheel and tighten.? Tap spacer and wheel down on shaft and assemble.? This runs super smooth and has much more air flow.? Low speed is perfect speed.
C
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Re: SX-117 noise limiter behavior
Hello all,
Thought I would weigh in on this thread.?
I have an ANC-4 that I decided was not working. Sometimes there seemed to be an effect, othertimes none. So I sent it back to the factory for evaluation. This was $60 plus shipping both ways to learn there was nothing wrong with the unit.
I did chat with two folks at TimeWave and learned the following:
As the ANC-4 works by sampling noise, then inverting the noise signal and adding it to the main signal, it will only be successful if the noise on both antennas is matched. The manual recommends a short dipole close the ground for the noise antenna, but the folks at TimeWave said to use whatever works. That is to say, you should arrange the noise antenna as vertical, horizontal, or whatever just so you can ge the same noise signature and level on both antennas.
There is a level control on the ANC-4, but the range may not be sufficient to match both signals.?
I was told that the unit only works properly if there is a well characterized single noise source. That is, ?there should be something "tangible" to detect, invert and cancel.?
For random grunge from scores of SMPS sources coming from all directions in your neighborhood, the ANC-4 is likely to be ineffective. On the otherhand, if your neighbor's garage plasma cutter runs 24/7 you might just be able to zap it away.
This is the best case to sign off with "YMMV", as it certainly will.
Cheers,
=Randy= WB6MAI
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On Sat, 2024-06-15 at 20:41 -0400, don Root via groups.io wrote: Hello all. I just read the ANC-4 ?blurb.? ?It seems to me that if the noise comes from? wiring in the house, use a small noise ¡°antenna /wire near the¡± sourse or maybe near the wiring, but if the noise is from outside power lines, use a longer outdoor wire.? They ??leave the whole type of main antenna to be a mystery. No wonder ?there are reports that it works well and others that it is bogus. ?IMO the noise? location[s] and the antenna combinations used is missing, and must be a very big topic.???? don ? ? The ANC-4 by Timewave is a very effective device for limiting local noise. ?I get more than 40dB reduction, sometimes more, so that weak signals stand out against an almost silent background. ?MFJ makes a similar device. ?These devices use an active RF circuit to amplify the offending noise from a separate antenna, and then beat it against the same noise in your main antenna. ?They really work. I see some used ones online around 125 bucks. ? Preston WJ2V
On Jun 10, 2024, at 1:52 PM, Maynard Wright, P. E., W6PAP via <ma.wright@...> wrote: ? The use of a noise antenna and associated circuitry is independent of
the nature of the noise, whether or not it's periodic and whether or not
it's random.
Ideally, the signal antenna would receive the signal plus the offending
noise and the noise antenna would receive just the noise. The combining
network would be adjusted to combine the two signals so that their time
domain noise components would be equal in amplitude but opposite in
polarity so that they would cancel and leave only the desired signal at
the input to the receiver.
There are several potential difficulties that make this system less than
perfect in most, if not all, implementations, but it may reduce the
noise enough to be useful in some situations.
73,
Maynard
W6PAP
On 6/9/24 17:11, Mike Feher wrote: It seems to me, that since noise is neither correlate-able or
stochastic, elimination is not possible. Also the multiple antenna
theory is out the window since RF generated noise travels at the speed
of light. 73 ¨C Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
908-902-3831
*From:* [email protected] <[email protected]>
*On Behalf Of *Maynard Wright, P. E., W6PAP via
*Sent:* Sunday, June 9, 2024 7:31 PM
*To:* [email protected]
*Subject:* Re: [HallicraftersRadios] SX-117 noise limiter behavior
Another technique for reducing or eliminating noise was to introduce
local noise to the front end of a receiver from a local "noise antenna."
The amplitude and phase of that noise could be adjusted to, hopefully,
cancel the noise received by the signal antenna.
Early BC-342 and BC-312 receivers featured a noise suppression circuit
of this type. War Department TM 11-850 states that the noise antenna
was intended to eliminate ignition noise when the receiver was mounted
in a vehicle.
By the time my BC-342-N was born (1942), the noise antenna and
associated circuitry were omitted, so that circuit may not have worked
well. The September, 1946 revision of the TM notes that spare parts
were no longer available for the noise suppression circuit and
recommends removing it if any of the components fail.
MFJ has featured at least one similar unit, the MFJ-1026, which is now
listed as sold out. There are other such units available but I have no
experience with them.
73,
Maynard
W6PAP
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Re: SX-117 noise limiter behavior
Hello all. I just read the ANC-4 ?blurb.? ?It seems to me that if the noise comes from? wiring in the house, use a small noise ¡°antenna /wire near the¡± sourse or maybe near the wiring, but if the noise is from outside power lines, use a longer outdoor wire.? They ??leave the whole type of main antenna to be a mystery. No wonder ?there are reports that it works well and others that it is bogus. ?IMO the noise? location[s] and the antenna combinations used is missing, and must be a very big topic.???? don ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Preston Douglas via groups.io
Sent: Tuesday, June 11, 2024 11:19 AM
To: [email protected]
Subject: Re: [HallicraftersRadios] SX-117 noise limiter behavior? The ANC-4 by Timewave is a very effective device for limiting local noise. ?I get more than 40dB reduction, sometimes more, so that weak signals stand out against an almost silent background. ?MFJ makes a similar device. ?These devices use an active RF circuit to amplify the offending noise from a separate antenna, and then beat it against the same noise in your main antenna. ?They really work. I see some used ones online around 125 bucks. ? Preston WJ2V
On Jun 10, 2024, at 1:52 PM, Maynard Wright, P. E., W6PAP via <ma.wright@...> wrote: ? The use of a noise antenna and associated circuitry is independent of
the nature of the noise, whether or not it's periodic and whether or not
it's random.
Ideally, the signal antenna would receive the signal plus the offending
noise and the noise antenna would receive just the noise. The combining
network would be adjusted to combine the two signals so that their time
domain noise components would be equal in amplitude but opposite in
polarity so that they would cancel and leave only the desired signal at
the input to the receiver.
There are several potential difficulties that make this system less than
perfect in most, if not all, implementations, but it may reduce the
noise enough to be useful in some situations.
73,
Maynard
W6PAP
On 6/9/24 17:11, Mike Feher wrote: It seems to me, that since noise is neither correlate-able or
stochastic, elimination is not possible. Also the multiple antenna
theory is out the window since RF generated noise travels at the speed
of light. 73 ¨C Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
908-902-3831
*From:* [email protected] <[email protected]>
*On Behalf Of *Maynard Wright, P. E., W6PAP via
*Sent:* Sunday, June 9, 2024 7:31 PM
*To:* [email protected]
*Subject:* Re: [HallicraftersRadios] SX-117 noise limiter behavior
Another technique for reducing or eliminating noise was to introduce
local noise to the front end of a receiver from a local "noise antenna."
The amplitude and phase of that noise could be adjusted to, hopefully,
cancel the noise received by the signal antenna.
Early BC-342 and BC-312 receivers featured a noise suppression circuit
of this type. War Department TM 11-850 states that the noise antenna
was intended to eliminate ignition noise when the receiver was mounted
in a vehicle.
By the time my BC-342-N was born (1942), the noise antenna and
associated circuitry were omitted, so that circuit may not have worked
well. The September, 1946 revision of the TM notes that spare parts
were no longer available for the noise suppression circuit and
recommends removing it if any of the components fail.
MFJ has featured at least one similar unit, the MFJ-1026, which is now
listed as sold out. There are other such units available but I have no
experience with them.
73,
Maynard
W6PAP
-- don??? va3drl
|
FS: Hallicrafters HA-8 Splatter Guard with Manual
Hallicrafters HA-8 Splatter Guard with Manual - $100 plus shipping
No way to test with a radio. Eye tube is bright. Missing the detector unit but their is a schematic of it
in the manual. It's 3 caps and 2 diodes. Looks relatively easy to build.
Includes a photocopy of the manual.
Dave N7RK
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Re: Parting out an SX-100
As Don recommended, just measure it.?
Looking at the parts list for the SX96, SX99 and SX100, it does appear the part numbers are different.
But Hallicrafters was very cost effective in building these radios and used the same cabinet many times.
I doubt they used different versions of S meters.?
May be wrong....but definitely going to put the shop rule on mine this evening
Keith
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Re: Parting out an SX-100
Hello guys, why not measure the width/height of the visible part first and compare ? ¡»å2
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From: [email protected] [mailto:[email protected]] On Behalf Of Donald J
Sent: Thursday, June 13, 2024 1:51 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] Parting out an SX-100? The only way to tell if they are different in size is to remove and measure.? To my eye though, they look different in size.? ? Still looking for the clear bands/freqs dial covers on my SX-99.?
Are they the same as the SX-100?
-- don??? va3drl
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Noise Blanker circuit found
Here is a link to the manual for a Noise Blanker for the KWM-2.? See:
Two pentodes, two dual section triodes and eight Germanium diodes plus associated components.? Monitors the noise at 40mc and gates the IF signal in the KWM-2.? Not a simple solution but perhaps quite effective. Regards, Jim Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
I've looked and have not found a radio that uses a noise blanker.? All I have seen is clippers which remove noise spikes above a set level.? The guitar guys mention it but it is a squelch gate which is open below a set value and closes above this set level.? So audio is muted for very low passages; one assumes to remove background hiss. Regards, JIm
Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy
Thanks jim, but first, is/has this topic swung to dealing with ignition noise only?? For an SX-117 ??? . interesting discussiuons, but what is the scope of it? Help..I¡¯M lost??? ¡. again. don ?
From: [email protected] [mailto:[email protected]] On Behalf Of Jim Whartenby via groups.io
Sent: Monday, June 10, 2024 3:58 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] SX-117 noise limiter behavior ? Read the enclosed excerpt from TM 11-310.? The first page shows the noise antenna circuit and lists all design changes to the series of receivers.? I would think that the noise antenna would be short so as to only pick up ignition noise.? Anything longer would subtract form the signal of interest. Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy On Monday, June 10, 2024 at 01:55:22 PM CDT, don Root <drootofallevil@...> wrote: Maynard, your theory sounds mostly good, but we need some details on what is called an antenna; will it work with my 10 feet of haywire antenna? ? ? The operation of a noise antenna and associated circuitry are
independent of the nature of the noise, whether or not it's periodic and
whether or not it's random.
Ideally, the signal antenna would receive the signal plus the offending
noise and the noise antenna would receive just the noise. The combining
network would be adjusted to combine the two signals so that their time
domain noise components would be equal in amplitude but opposite in
polarity so that they would cancel and leave only the desired signal at
the input to the receiver.
There are several potential difficulties that make this system less than
perfect in most, if not all, implementations, but it may reduce the
noise enough to be useful in some situations.
73,
Maynard
W6PAP
--
don??? va3drl
|
Re: Parting out an SX-100
Hi Bruce The only way to tell if they are different in size is to remove and measure.? To my eye though, they look different in size.? Kr? D
Still looking for the clear bands/freqs dial covers on my SX-99.?
Are they the same as the SX-100?
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Re: SX-117 Noise Limiter fix
I think I suggested this possibility since the limiter was capable
of shorting out the IF signal. Congratulations on finding the culprit.
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On 6/12/2024 5:18 PM, Floyd - K8AC wrote: This started in another thread, which went off on a tangent and never
answered my question.? On my SX-117, switching the Noise Limiter on
resulted in the signals and background noise level just about
disappearing.? I wondered what should be heard when the NL is switched
on.? In my case, the problem was traced to one bad diode in the simple
noise limiter circuit.? The diode wasn't shorted or open, but exhibited
a resistance of 64 ohms in both directions.? That was enough to short
the IF signal to ground.? With the diodes replaced, when you switch the
NL on with no noise present, there is no difference in what you hear and
strong nearby signals do not cause any distortion.? The original diodes
are obsolete, but you can find them on eBay if you're willing to pay the
price.? Or, you can use 1N459A diodes as suggested by K9AXN.? They're
available from the usual suppliers.? At this time, there is no local
noise here so can't evaluate how well the NL circuit functions.
73, Floyd - K8AC
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
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Re: SX-117 Noise Limiter fix
Hello, Floyd,
Yes, watched the thread wander and there was some good theory put forth but not any direct answers. Don't expect anything spectacular from the early back to back diode noise limiters of yesteryear. They can chop noise peaks but are no match for the modern dsp processing available today. Do have an R4C with the noise blanker strip and it is a definite step up. The one in my Signal One CX-7A is also pretty effective but I usually resort to my W9GR outboard DSP to really knock out noise.
Glad you id'd the defective diode, which would have been my first thought. There was a suggested improvement for the CX-7 using a pair of diodes right at the antenna input. Tried it but later removed them and went with my W9GR DSP unit.
Happy hunting and see you in the pileups!
73 ... Ed, WA9GQK
On Wednesday, June 12, 2024 at 07:18:48 PM CDT, Floyd - K8AC <floydsense@...> wrote:
This started in another thread, which went off on a tangent and never answered my question.? On my SX-117, switching the Noise Limiter on resulted in the signals and background noise level just about disappearing.? I wondered what should be heard when the NL is switched on.? In my case, the problem was traced to one bad diode in the simple noise limiter circuit.? The diode wasn't shorted or open, but exhibited a resistance of 64 ohms in both directions.? That was enough to short the IF signal to ground.? With the diodes replaced, when you switch the NL on with no noise present, there is no difference in what you hear and strong nearby signals do not cause any distortion.? The original diodes are obsolete, but you can find them on eBay if you're willing to pay the price.? Or, you can use 1N459A diodes as suggested by K9AXN.? They're available from the usual suppliers.? At this time, there is no local noise here so can't evaluate how well the NL circuit functions.??
73, Floyd - K8AC
|
This started in another thread, which went off on a tangent and never answered my question.? On my SX-117, switching the Noise Limiter on resulted in the signals and background noise level just about disappearing.? I wondered what should be heard when the NL is switched on.? In my case, the problem was traced to one bad diode in the simple noise limiter circuit.? The diode wasn't shorted or open, but exhibited a resistance of 64 ohms in both directions.? That was enough to short the IF signal to ground.? With the diodes replaced, when you switch the NL on with no noise present, there is no difference in what you hear and strong nearby signals do not cause any distortion.? The original diodes are obsolete, but you can find them on eBay if you're willing to pay the price.? Or, you can use 1N459A diodes as suggested by K9AXN.? They're available from the usual suppliers.? At this time, there is no local noise here so can't evaluate how well the NL circuit functions.??
73, Floyd - K8AC
|
A while back I was searching for? a crystal for my SX-117 to cover the first 500 Kc of 10 meters (crystal freq of 34.5 MHz).? A crystal provided by AF4K was too far off frequency and I couldn't find any other source of crystals in HC6 holders.? I ended up buying a crystal in an HC-49 holder from Krystaly in the Czech Republic.? Their price is $40 and that includes postage from Europe.? Delivery time was about 3 weeks and their communications was excellent, including lab test reports of the crystal.? The frequency was spot on.? A HC-49 crystal fits inside an HC-6 housing and you just wind the wire leads around the HC-6 pins and solder.? The HC-6 housing fits over the new crystal and can be resoldered to look like the original HC-6 crystal.? You can contact the Czech company at: krystaly@...? . 73, Floyd - K8AC
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Re: Parting out an SX-100
Still looking for the clear bands/freqs dial covers on my SX-99.?
Are they the same as the SX-100?
|
Re: Parting out an SX-100
Gotcha. Thanks? Bob W4JFA?
The ¡°un-yellowing¡± procedure is for the clear plastic meter cover, not the meter face itself.? I have no idea how the ¡°un-yellowing¡± procedure would work on the meter face card.
Mike/
K5MGR
_____________________________ ? Mike Langner
NW
Albuquerque, NM 87114-1901
(505) 898-3212 home/home office
(505) 238-8810 cell
mlangner@...
? ? So the print stays intact? If you mentioned that, I missed it. ? On Wed, Jun 12, 2024, 12:26 AM Rudy Littrell via <kc5yl.radio=[email protected]> wrote: Donald and Mike.? ?Thanks for your de-yellow info.? Mine must have seen a lot of sun exposure. It's as yellow as a turn signal lense.? ? Gosh, Thank you for that Mike as I had not the heart to tell Rudy that I've never had or seen an SX-100 S meter cover that wasn't yellowed! And now I will be able to clear the covers on the two that I have that are quite yellowed. I'm recent to this group so missed and didn't know to look for something about meter covers. ? Note to Rudy, kc5yl --
Hello Rudy!
I failed to keep your email address, so my apologies for sending this to the group.
If your SX-100 meter lens is yellowed but otherwise in good shape, please take a look at ¡°Retro-Brite,¡± a spray that restores yellowed plastic.? It¡¯s available from many sources, including Amazon.?
Recently there was a flurry of exchanges about ways to de-yellow plastic, most of which revolved around hydrogen peroxide and sunlight, with some augmentation chemicals added in for good measure.
You should be able to restore the ¡°yellow-free¡± nature of the plastic with little effort!
Good luck a& 73!
Mike/
K5MGR
_____________________________________________ ? Mike Langner
NW
Albuquerque, NM 87114-1901
(505) 898-3212 home/home office
(505) 238-8810 cell
mlangner@... ?
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don Root
Jim Whartenby
Donald J
Floyd - K8AC
Bruce Collins
Bob