Hammarlund HQ-140-X Repair and Restoration
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- Опубліковано 30 вер 2024
- Everything you need to know about the Hammarlund HQ-140-X Receiver (and more) in one video. Included in this video: A correction to a mistake in Hammarlund's alignment procedure. Important "missing" instructions to the alignment procedure. Lots of troubleshooting tips and tricks. See the performance of this receiver as aligned to factory spec's. Follow along beside Paul through the entire alignment, troubleshooting, repair and restoration procedure of a fantastic communications receiver. FOR MORE information, click the "SHOW MORE" tab right below this box.
Heathkit signal tracer video:
• Signal Tracer Troubles...
Spectrum analyzer protection video:
• Build this Spectrum An...
Video Facts:
*Creation time: 1 month start to finish. (excluding editing time)
Video size as uploaded in MP4: 19.7Gigs. (before compression: 32 Gigs.)
*Individual video's within this video, edited together: 42
*Still pictures: 2. Taken by Marie (my other half :^)
*Still's camera: Canon 5D Mark II.
*Video Camera: Canon Vixia.
*Audio: XLR balanced to camera. Customized vacuum tube condenser microphone. Applied Research and Technology "ART Voice Channel."
i was watching how someone got hurt when i went to sleep and woke up to this 😹
LOL I JUST WOKE UP TO THIS TOO!!! Fell asleep for who knows how long and this is what's on!
Same 😂
Same
Same lmfao
Same wtf
Thanks Paul, especially for the SSB tips on overdriving the sensitivity.
Paul, that was simply amazing. The knowledge you have and the way you present your repairs are incredible. I started watching this video right after you posted it. Was working in the shop while doing so and just found it astonishing. Very well done on this relic.
Thanks Buddy!
The "Tuner Capacitor" is a work of art Paul. I think you have a unused receiver there. Any drift can be put down to age. My word you don't muck about with your vidio's. 10 out of 10 for expertise and just about everything else.Stuart.
Thanks for kind comment Stuart!
I agree. I think I would have checked the spades on the power plug to see if it had ever even been plugged in!
I have watch a number of Mr. Carlson's videos in the past few years. All of them are great, but so far, this one is the best of all. Having walked by many of these HQ-140's at Ham swaps over the years, I may just bring the next nice one home. :-)
Hello Paul - I just wanted to thank you for this excellent video. About 16 years ago I had an HQ-140X and it was one of the most enjoyable receivers I have ever used. It was just a lot of fun to operate and I remember how sensitive and stable it was. I was able to tune in a German ham operator on 10 meter SSB and even at that frequency it wasn't necessary to "touch up" the tuning to keep him intelligible. Very impressive.
Hammarlund did a beautiful job in the design and manufacture of this receiver and I would like to find another one but they seem to be getting fairly rare, especially in the condition yours is in. Anyway, thanks for the excellent tips on restoration and alignment and the trip down memory lane with the "band cruising". Your videos are excellent and very informative. 73, Bruce K6RQR
I'm glad you enjoyed the video Bruce. Thank You for your kind comment!
3 hours of joy that is, wowie!
你好啊，你也喜欢看 Mr Carlson 的视频 ：）
猪枣泥 啊你好。他的视频内容都很轻松有趣，每次都拿来像看电影一样看
你是做这一行的吗？在国外？
兴趣而已
Thanks for your kind comment! Glad your enjoying the video's :^)
I really liked the audio noise troubleshooting part. Another great video.
0:00:00 - 0:01:30 | Intro
0:01:30 - 0:09:12 | First look outside
0:09:12 - 0:12:25 | First look inside > top
0:12:25 - 0:16:21 | First look inside > bottom
0:16:21 - 0:23:33 | Testing paper caps for leakage
0:23:33 - 0:25:05 | [SPOILER] Replacing caps
0:25:05 - 0:31:37 | First power up, functionality walkthrough and rough diagnosis
0:31:37 - 0:35:28 | Testing broadcast band alignment
0:35:28 - 0:37:58 | Looking at engineering-porn tuning capacitors
0:37:58 - 0:40:49 | Cleaning the dials
0:40:49 - 0:41:28 | Aligning the dials with their windows
0:41:28 - 0:45:58 | Looking at the schematic and notes on test gear connection for alignment
0:45:58 - 0:47:55 | Attaching spectrum analyser
0:47:55 - 1:12:23 | Initial spectrum analysis of IF alignment
After many hours of IF alignment...
1:12:23 - 1:33:42 | Explaining the IF alignment procedure with spectrum analyser and manufacturer spec. sheet
1:33:42 - 1:37:22 | Explaining the Beat Frequency Oscillator alignment
1:37:22 - 1:40:54 | Beginning the aligning of the Antenna, RF and Oscillator sections
1:40:54 - 1:52:54 | Notes on manufacturer's published alignment procedure including their error and omission
1:52:54 - 1:56:14 | Setting up for alignment
1:56:14 - 2:03:22 | Alignment using an oscilloscope or Vacuum Tube Volt Meter
2:03:22 - 2:08:59 | [SPOILER] Something's not right
2:08:59 - 2:24:09 | Troubleshooting with RF probes and a signal tracer
2:24:09 - 2:26:25 | Ready to test the restored receiver
2:26:25 - 2:30:03 | Listening from .54 to 1.32 Megacycles
2:30:03 - 2:31:42 | Listening from 1.32 to 3.2 Megacycles
2:31:42 - 2:33:00 | Demonstration of noise limiter
2:33:00 - 2:34:37 | Listening from 3.2 to 5.7 Megacycles
2:34:37 - 2:36:36 | Using the BFO to tune in on side band
2:36:36 - 2:37:44 | Listening from 3.2 to 5.7 Megacycles cont.
2:37:44 - 2:38:38 | Manually tracking a moving signal
2:38:38 - 2:39:48 | Listening from 3.2 to 5.7 Megacycles cont.
2:39:48 - 2:45:02 | Listening from 5.7 to 10 Megacycles including more side band and noise limiter action
2:45:02 - 2:50:51 | Listening from 10 to 18 Megacycles
2:50:51 - 2:54:14 | Listening from 18 to 31 Megacycles including using the BFO to tune in on a Morse code beacon
2:54:14 - 2:57:35 | Final notes and reminders for alignment
2:57:35 | Outro
Deserves more likes, helped alot!
Amazing, thanks for this!!
AaAAAAAAAa
You have way too much spare time on your hands.
@@Frankowillo If a job's worth doing, do it properly ;)
Mr Carlson the nobes on the Hammarlund HQ-140x collar brown is cool
ooooo.. Been waiting for this.. going to cook our lunch and then settle down for some quality educational video. I love your videos, keep up the great content.
Thanks!
Fantastic job Mr Carlson! I was waiting years for electronics teacher like You!! It couldnt be better, greetings!!
Hey Paul. The work on this kind of long and in depth video is just taken for granted by most. Must be really chalenging douing the restauration with added cinema filming labour. And editing. I can only imagine the amount of work and dedication. But the finished product is worthy of movie avards. Or at least documentary materion on Discovery channel. Thank you and respect. Hope to see more like this soon. Maybe an sp600?
PS. A quick vid with math for the impedance matching box? I need it for 50 to 300 ohm. So math would be apreciated.
Thank you. I support on patreon aswell. You are a tresure for us hobby boys!
Hello Mr. Carlson, I obtained my Associates Degree in Electronics about 40 years ago. I have been in the electronic/Electrical workplace for about 50 years.
I went into electronics in order to do the exact type of work you are doing. Board level repair. It seems I have been in Industrial Instrumentation , Telecommunications and general electrical.
Drat. I have retired now and found your channel. You are giving me great experience in troubleshooting and repair of an array of electronics. I probably won't do it professionally, but
I will do it for pleasure. I have two old receivers in upright wooden cabinets. I am ordering parts to replace the ones already there. Thank you very much. I don't have your test equipment.
I hope I have enough to at least do a fairly good alignment. Thanks again. Keep the video coming!!
Hi Paul, well done! The video is a volume of good information. Both video and explanations of each procedure was outstanding. This one will be referenced by many and useful for everyone. 73
in spite of its length, this is by far the most enlightening video I've seen on the subject as he exposes rarely talked about intrincacies. worth watching every minute
Got my start in rf with this radio. Got one from a neighbor when I was 10 years old. 56 years later feeling really sorry I don't still have it.
Thanks for sharing your story Stan!
I appreciate the time and effort you put into your videos.
It's amazing seing such a young person with such a knowledge of these vintage machines.
me too
me too :-)
👍👍👍
@15:00 they dont make them like that any more...wow... makes me feel bad for the next gen...facebook went down today and the kids are ready to jump of a bridge...
Times sure are different!
Just yet another find example, of the Mr Carlson letting up ride along in his time machine. Loved the part of him showing us what this beast will do. Thank you so much for all you do ,I'm glad to support his channel and be a Patreon.
Thank goodness for mr Carlson !!
I've got a 100, a 170 and a 180.
This sure will help.. Thank you, sir
All real nice receivers! Glad your enjoying. Thanks!
Even though I know squat about electronical stuff, I sure enjoy this electronical stuff. I wish my High School teach was as involved as you are. I might have made a difference as you do
Yeah...a lot of this stuff is a little 'over my head' but the presentation is well worth the time to watch...!
I grew up in the 50-60's...Hammarlund was a top quality name....
Doug Ankrum
yup... kinda weird....butt hey ...get it while we are alive
@@jime386, and thank goodness for UA-cam for memorializing this kind of knowledge for us all. When he's gone, it's NOT gone, thank goodness.
@@BruceNitroxpro yes, but it will all go away when the electricity shuts down. Impossible you say? Look up "Carrington Event"
@@jime386 No, "Beware the EMP event?" LOL I'll lose my Internet, so... oh well! At least my OLD stuff will probably work!
Would love to see you work on an SX-28!
Those milk 🥛 chocolate 🍫 colored knobs look 👀 great 👍 on that radio 📻. It seems like 👍 about every owner gets into the back of these radios 📻 to align, or fine tune them. Often, they use metal tipped screwdrivers 🪛 to turn the capacitors. This can short a capacitor out, and ruin it. Doing this is much like 👍 the game Operation. Touch the capacitor with the screwdriver 🪛, and that capacitor is shorted. I’d be scared 😱 to try to clean 🧼 those dials, taking the numbers off. That would really suck, since ya cannot make it original, trying to put the numbers back on. I’m certain somebody can, but at what cost? Keeping one ☝️ of these radios 📻 original as possible, helps it hold its value. I really like 👍 the impressive length of this video, almost 😅 topping 3 hours. Your friend, Jeff.
Wow... You know I love sagas! I would have pulled out the popcorn but I watched it first thing in the morning. Too early for popcorn.
Great information here and what a beautiful performer this radio is. All those alignment tips will come in real handy! I also loved the way that you isolated that noisy passive component with that non-conducting probe. Now I know the real reason for the noise generator function. Works a treat.
The video, I think, could use one more thing. "Intermission!"
Great job Paul as always,
Tom
Thanks Tom!
Thanks for another good video. I would prefer black knobs they would look more professional like the R-390s that I worked on years ago in the Navy, the brown just looks like they had a bunch left over from another project and used them to keep cost down.
I binge-watch these videos like some people binge-watch Netflix. I'm very, very boring person. And I'm cool with it. FOR SCIENCE!
Glad you made this video as I am working on mine now. I need to make the probe interface boxes. I wish I could just buy ones from you and I can't make a printed ckt board so mine will not look so nice. thanks Mike
Great video. I really appreciate all of the time you spend to make such a detailed video. When you started tuning the 3.2 mhz band, the first station you picked up was a North Korean propaganda broadcast. I doubt it meant anything to you unless you happen to speak Korean like I do, but it was cool! Thanks again!
If I were to describe the colour of these knobs, it would be "Dog Sh.." I mean "Milk Chocolate" Brown 😂
I'll go with your first choice. Bad choice of colour on Hammarlund's part.
I am curious about something. How well does the noise limiter work against switching noise from modern PSU's?
Mrister Carlsons lab you are good at restoring antique radios and alignment of antique radios 📻 and restoring antique tvs sets my friend
ı watch these channel because ı love nostalgic devices so much. for example: tube tvs, tube radios ...
It's been a wait, but it was worth it! The last couple of videos I've actually started worrying about you a few days before it came out; "what if he got a shock, or there's a forest fire and so on and so forth.."
High point for me was the finding of the noisy part. I'd love a video on that probe.
Thanks Steffen. I will do a probe video soon.
Great video! Thanks for sharing! I would like to see hookup and alignment using sweep and an oscilloscope as most folks dont have a spectrum analyzer. Thanks for all the great content of your videos! Take Care-Larry
BTW, where on AM do you hang out, Id like to see if I could work into Canada on the old HT-37? Thanks Larry W4PJP
That's an amazing find - always enjoy watching your excellent videos. Those ceramic stand-offs on the filter cap are a great idea!
Thanks, I have owned it for some time now, but wanted to save it for a video. Many more receivers in the waiting.
I wish if we could have more people like you. This level of detailed knowledge about radio repair is just so rare to find..
L
Qwqwq we
put the good paper capacitor in a picture frame!
Let me say that Mr. Carlson you do much more than give generously of your electronics knowledge, you bolster ones faith in their fellow man. Your teaching is very much appreciated on many levels, Thank You'
P hb.
I love these old radios they have so much personality
Very informative and very well done! I've aligned many old radios, but I still learned a number of things from this video! One suggestion: your spectrum scope H-P 3585B is a beautiful instrument, but I'll bet that almost no-one viewing the video has anything that good. It would be very interesting (and much more useful by much of your audience) to see how you do the alignment with a more humble (and much more common) set of instruments. For example, an old Tek scope (like my 453), the sweep from a general-purpose function generator, and a frequency counter. Thanks again for this video! Fred VE1FA
I am in awe of the level of your knowledge, humbleness and genuine willingness to share, explain and teach this highly technical and unique skill set. Thank you. I find your videos highly entertaining and fascinating. I have no experience in ham radio or electronics but you make me want to learn more about how radios work and were made decades ago. It’s amazing what people have invented and created. It makes you realize the amazing gift we have been given. God bless you.
Jim Wingert
Jupiter, FL
Once again Mr. Carlson you blow us away with your meticulous work and have uploaded yet another historical document! It's bittersweet for me because months ago I saw in one of your videos that you had an SP-210 sitting around, the radio I own, and I had been meaning to ask you to document and work on one of those early Hammarlunds. I was encouraged on your video to hear you've got a couple pending on the bench, so brother I hope you work on and upload an SP-210 as there are substantial differences in the older sets that could help many of us out. That's my X-Mas wish!
Mr Carlson Hammarlund HQ 140x the big specker the ton sounds good
I guess it's all a matter of taste. I think the brown knobs absolutely do not go with the rest of the case.
Paul you are an awesome Tech! I am learning so much from your video's.
Same cap was causing the same problem in my HQ-140X
Leaving paper foil/oil caps in circuit is against PAULicy.
Where did you go to school? How can I achieve this level of mastery? I'd seriously like to learn just half of what you know. I have sooo many questions.
Just too much time around RF and high Voltage :^) LOL...Seriously though, one day I may do a Bio video.
Mr Carlson's Lab please, do.
@@MrCarlsonsLab You did a video about it? ☹️
Wow!
I don't know anything about these radios Mr. Carlson
But I know quality and Beauty when I see it!
I'm sure glad you are on here passing your knowledge on to other people on how to keep these things going.
I am just a hobbyist, but I'm going to guess that they just don't teach this stuff in school anymore? Everyone seems to be in to micro Electronics. Some things just cannot be replaced!
I woke up to this and I'm so confused
me too, and another comment.
pay attention
Where do you get those ceramic standoffs?
This video is kind of like a video version of a service manual. Do you think its possible to add a few links into timestamps of the video to jump to certain sections, just like an index in a service manual? I am sure a lot of people will bookmark it in case they will later need it to look something up, its probably very helpful to jump right to the wanted part.
Mr Carlson I think shortwave receiver was left alone
I agree.
I'd really love to see an FM alignment video. Keep up the great vids!
interesting unit Mr C .. ( Paul ) from ham rf alexpm
Sir just want to convey my extreme oppression for the time and effort you put in all your video's. love of the craft really comes through
and it's that same love of watching my father work on the electronics of my youth this is where my love of all things electronic. Thank you the craft you teach in invaluable too us all and is very much appreciated. God bless you and yours. Thank you for giving so much of your time.
Thanks Joseph, Glad to share!
Mr Carlson your Hammarlund HQ_140.x is cool
I'm really getting a lot of enjoyment from your videos. A search for a better understanding of vacuum tube operation led me to your channel. I really enjoy the format of your videos. Although a lot of content is above my head, your attention to detail is very obvious. Thank you so much for inviting us into your lab!
Paul...
This was once again a terrific video.
You mentioned the restoration of the Hallicrafters SX-28 . I have more than several in various stages of restoration. I perhaps misunderstood, but I thought that you had reviewed the SX-28 as one of your projects but, if you did, I’ll be darned if I can find it.
In advance, thanks!
Fred
I'm also waiting for SX-28(A) video.TY!
Mr. Carlson, another great video. i didn't see this until almost three years after its release. I Great work., I'm impressed.
Whats the farthest distance away by miles that you've ever picked up a signal from where you are? Also how mush do the Rocky Mountains effect radio reception?
MrJohnisthename , I am guessing all over the world on some bands during good propagation. It follows the 11 year sunspot cycle. He could hear some very weak signals during the good times, as have I from the east coast of the USA. de KQ2E
What can I say Paul the amount of work you put in to all your projects you are truly a perfectionist at what you do. The best three hours watching a genius at work. thank you so much Paul for sharing all this with us. You just amaze me all the time you treat all you projects with the respect they deserve you have some lovely radios they don't make them like that any more. I honestly I don't think there is nothing you can't fix. and when it comes to restoration you are number one the work to details is perfection.
I have an odd request, may have no interest to do so, but i would love to see some explanation of mods and how a typical CB works. I used to drive truck over the road and different CB techs across the country will feed you different stories about how to mod a cb to have more output, or as they call it peak and tune. Just if you happen to have an interest in doing so, i would greatly appreciate it.
...been waiting for this too. 3h felt like 30 minutes. I like your longvids :)
Thanks for another great lesson!
The radio of radios! This reminds me of my grandfather who loved radios. On new years day he usually had the main TV, a portable B&W TV and three desktop radios all tuned to different games. It was insane but the man could multitask and the whole town came to him to find out the scores. He also had a Zenith AM/FM tube radio at his bedside and usually listened to AM shows all night long. His last favorite radio was a Cobra 29 CB transceiver.
OH boy a long one!! woohooo!!
I think this is the longest to date. So much to cover.... this is actually condensed. Some of the video details are under the "show more" tab, below the video description.
I love Shortwave :) Started out with a Am transistor radio as a kid then graduated to shortwave I love it!!!!!! always have
lots of things can be tuned in world radio you can here stations depending on the band 234 / design frequency = each dipole side length in feet,
OR - 468 / design frequency = total length in feet. Most builders cut long and trim the total length for lowest swr on their design frequency. for the Antenna!!! and you can here the world! this rocks and as a ham now I have taken my love of radio not only talking and tuning in but also learning and refurbishing them some day :) but if you use this in a 2 sided dipole you use a 50 ohm line for the best receiving and you can divide the total length on each side you can here radio in France and Japan UK Germany Havana CUBA, Spain all over the place I love radio always have always will. Even Russia and other places no min use English depending on time of day and Space weather Forecast if no sun flairs are interfering with the band you can here a lot of stations coming in...
Great job man great representation it takes a lot of time..
Paul, despite my occasional carping, I believe that you have one of the very best UA-cam channels available to most of us, the mere mortals. I could make similar videos, but they would each last over an hour, involve a lot of "magic smoke", expose the viewers to a great deal of "inappropriate" language, and make a lot of extra work for me. I have as much -- or more -- test gear as you, and my local electric utility just loves me. Yeah, I know...
...Like you, there is a Lakewood® scattershield on my electric meter ;-), installed after my [underground] neutral opened ("Act of God!"..."Uh-huh, yeah, sure...!"), causing a lot of my "stuff" to go to electrical heaven.
Twelve fires -- nine in surge protectors -- resulted, with Romex® cables burning and receptacles actually blowing out of the wall. Fortunately, I -- and most of my kids -- were in the house at the time, and we knew how to handle the situation. If we had not been home, I would be paying a thousand bucks a month to live in my car because my homeowners' insurance was not in effect for one of the eight days during which the disaster occurred.
All of your videos seem to go "One, two, three...Done!", but, for those of us who know, there just might be a bit of editing in there. A "Bloopers" reel or something similar might prove to be a "hit" for you. If you have never "barked up the wrong tree", then, I remove my hat. Otherwise, you might increase your hit count.
I -- and many others -- would really like to see a video of your biography, C.V., or some other history.
Thanks for your input Ed! Lucky you were home that day, WOW sounds like a lot of dead electrical "things" came out of that. P.S.... Occasional "carping" is ok :^)
So much here that I'm going to have to watch several times. I don't mind waiting for content when it's this good.
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Mr Carlson when repair restoration is cool
Mister : only one word : THANKS !!! perfect , for me your job and knowlege is a pure joy and i'm learning many , many things !!! please continue your video and i hope many beautiful thing for you and your lab's !!! Eric from France ....
A ham buddy of mine had a 140x just like this w/the large knobs. Picked it up at the Dayton Hamvention in 1989. He loved it!
Thanks Paul. I am not sure about those brown knobs they used though. I have seen many original ads for those receivers, but they were in black and white, so I never knew the color of the them. A matter of taste, I suppose. You seemed to like them, and the object is to preserve the radio as closely to original as practical.
I appreciate your efforts in making the highest-quality videos I have ever seen on youtube, without regard to the subject. You seem to know just when to skip over things and when to slow down and show details. P.S.-I love the marathon videos! 3 hours of viewing pleasure.
I'll bet the knobs matched the tuning window bezels' slate color when they were new. My 1958 Heathkit Signal Tracer had fluted knobs of same apparent style as on Paul's HQ-140x. They were colored gray to match the panel when new. They have also aged to "milk chocolate." No significant exposure to sunlight. Just an unstable colorant.
Totally agree: Mr. Carlson's lab videos are the best.
I appreciate you explaining alignment and the application of various test gear...Thank You! Super Fine Radio!
Hi Paul. I'm curious about your device to connect the 50 ohm signal generator to the receiver.. I have an RTMA that I built from a Hallicrafters SX-110 manual but I don't know if it is to be used with a 50 ohm generator. Can I just terminate the input of the RTMA with a 50 ohm resistor. By the way! I just picked up an HQ-140-X (with chocolate knobs) at an auction today. I can't wait to get started but I've got to get my Hallicrafters SX-28A finished first. I nicknamed it Lucifer because I'm sure the Devil himself designed it. Another great one Paul. Thanks, Dave WB8VQV.
Thanks Dave! Are you referring to an RMA dummy?
Yes. I'm not sure why Hallicrafters put the "T" in it. I compared the Hallcrafters circuit to an RMA and they are the same. Thanks for the reply.
Geez, great video. Your skills are just mind blowing. I haven't seen one of the Hammarlund radios in 38 years and they were rare antiques back then. We used to sell them "as is" in a CB shop back in the 80's. I thought they were old military radios back the 80's because they were built like tanks.
..That has to be the cleanest piece of equipment I've ever seen on your workbench...!
I don't comment very often however this a truly great video. I learned a lot and throughly enjoyed it.
Thanks Neil!
I enjoy very much your video Mr Carlson. I Also subscribe your channel. Mr Carlson i have a HQ180A with burning IF on 455 KHz on V4. Do you have experience rewinding the IF Coil ? Thank you. 73s
Agus H , I am amazed he didn't respond to you, Agus. He would really love to work on your receiver, I am sure. de KQ2E
@@BruceNitroxpro i believe to much comments coming in and, he couldn't response them all. i made shortcut to bypass V4 and also bypass the notch. Receiver is back on. Thanks for your response
I've been working on mine. Works well except for the BFO. When I switch to BFO, the mode switch arcs and the VR tube goes dark. Something is drawing too much current. Perhaps the mode switch is messed up??
Hi Philip, there is a short somewhere.
@@MrCarlsonsLab --- thanks. Was just wondering if this was a common failure mode with this particular receiver. Restored most of it and the nicotine just poured off of it with cleaning.
A majority of these radios 📻 have very complex dial cords, and they can be very hard restringing. Alignment of the dial pointer, to being in relation to the proper marks, or numbers on the radio 📻 dial, is probably actually easier than dial cord restringing. It’s even tougher to restring a dial cord if it breaks, because the dial cord may not follow its actual path to the next pulley. It will be slack, and out of form, and not taut. In other words, the dial cord will lay in shapeless form around the pulleys. Unless ya knew exactly how the dial cord was strung, that could be easier, or if ya observed it during breakage. Your friend, Jeff.
Wow Almost a million views Mr Carlson! I know this is an oldie but I enjoy going back and watching you go through these old am radios. Well anything really your videos are a treat to us nerds lol
Thank you Mr. Carlson
These are great radios. I was in the Hammarlund factory many times. My best friend in High School was Lloyd Hammarlund Jr.
This video was a pleasant surprise find. I have an HQ-140 which has been sitting idle for decades. You've inspired me to have a look at it and start restoration.
Glad to be that inspiration!
I have no idea what you're talking about
but it was good background noise while i was working on something else.
My First Ham Station was a Hammerlund HQ-110C and a Heath DX40. Love the Hammerlund receivers.
The HQ-140X was my Novice receiver. I purchased it for $100 in 1960. Very sorry I ever sold it. I loved it!
Paul, I am a regular watcher and Patron member as well. I am in the process of restoring a HQ-120, the same version as you went thru a few years ago. I have a few questions regarding the alignment method you used here and on the 120. Where did you connect the tracking gen output, and the spectrum analyzer to these chassis? I see you had a 50 ohm to high impedance adapter for both connections. Where did you obtain these, or did you build these? I have been watching and rewatching these videos, and perhaps I have missed the answers to my questions. If so, I apologize. I am new to this method and am stumped, at this point. Any help you can provide me would be appreciated. Thanks. Chris, N9WHH.
Hi Chris, pin 2 of the 6AL5 goes to the spectrum analyzer input through my protection device. Remember to lightly couple the protection device to that area (clip the protection device signal lead to the insulation of the wire attached to pin 2 of the 6AL5,) there is enough signal in that wire to drive the analyzer correctly. Connect the tracking generator output of your spectrum analyzer through my other protection device to pin 7 of the 6BE6. Again to the insulation of the wire attached (light coupling.) It's extremely important "for the best alignment" to keep the test equipment invisible to the receiver. If its coupled heavily, you will load the receivers circuits, and when you remove the test equipment, the receivers alignment will change due to a capacitive and inductance difference. Here is a video on the protection devices I designed: ua-cam.com/video/ETKyKC2Zj-M/v-deo.html
Thanks Paul, for the reply. This is what I was looking for. I am gathering parts to build the protection devices now. I will see how it goes from here. 73 Chris.
Great, let me know how it all goes.
While sleeping, I was following a course about this in french with visual representations, once the video started my teacher restarted the whole course and started speaking english as in a new english student walked in the classroom then woke up to this video at 6 minutes. I'm mindblown.
The final product demo in the end was an awesome reward for the hard work of following the front of the video. All most appreciated. I think I have a "virgin" Hammarlund HQ-215 that was retired not later than 1965. It looks like it was used by a novice with a Heathkit DX-60/HG-10 combo which I also have and that also appears to be in the same old fine in the 60's state. The HQ-140 is amazing, but it sure would be nice if I could pay my Mathematics teacher pay to have this Hammarlund HQ-215 safely work nice by someone with the first/last initials "PC". This is the wrong forum for such an appeal, and I hope it was not too obtrusive. I'm good in QRZ. Joel ~ KN4EWI
Many thanks for the most informative, most detailed, perfectly described and beautifully presented videos, it is truly a blessing to be able to watch these videos ⚡
Thank You for your kind comment!
Paul, did you ever do the video for the simple RF probe as you discussed here? Not the super probe, but the one you shou here. Is it just the diode and cap style probe? Cheers
I can't believe those knobs. I've been a licensed ham since 1967, and have been to countless hamfests, and I've never seen one like that!
I will be watching this one again I have a HQ-140-X ( THIS VID IS OSSUM )
thanks for this video ,top!
Since this was aired new miniaturized spectrum analyzers have been flooding the market (TinySA). As most of us cannot afford a full sized spectrum analyzer, yet we want to do an IF sweep alignment on our radio (HQ129X in my case) can we use these $75 mini spectrum analyzers to do that alignment. It would make good video if you could… or even explain, if we can’t.
As ever, thanks for your gift of radio knowledge.
Cheers
I really need to build a tracking generator for my 8668a. Looks the best way to do it, never really got on with a sweep generator and scope.
I am surprised this set is not double conversion. Maybe it's to early ?
Another very detailed interesting video. Thank you.
Glad you enjoyed Simon!
Quick question... I have the HQ-140-XA and plan to follow your guide to refurb it. It works fine but it is probably in need of a new set of capacitors. My question. In one part of the alignment you generate a 5.3 MHz signal to determine the accuracy of the dials. I don't have a signal generator... Couldn't I just set my HAM radio to 5.3 Mhz at very low power and send a tone to check the radio's dial accuracy?