Airline Wells Gardner 6A27 Tube Radio Recap and Alignment

[@hql400]

the hum discussed at the end can be the one that is called "tunable hum", that means that some rf is blown to the line rectifier, and there it will be modulated (AM) with the line voltage ! This modulated rf will be received like a broadcast station or it is the IF, that will be modulated. There is a strong IF at the last IF stage. To solve this, there must be a capacitor across the rectifier or both side of the mains-rectifier(s) should be blocked with capacitors of some nanofarads (3 nF minimum). That will prevent the rf to be modulated at the mains-rectifier. Well, it is a little too late perhaps ^^

[@jamesmdeluca]

Greetings: I was going to suggest scoping the AVC but listened to others suggesting mains signal carriage and thought maybe he should compare another AA5 set performance at same freq.s. How about battery supplied B+ & heater supplies to eliminate mains signal transfer. Sounds like a good use for a battery powered set. I wonder what test gear would help determine the buzz freq. As it repeats. Not a good use for a signal tracer or another radio's local oscillator to beat against?

[@Moletastic69]

AA5, the good stuff. That tube tester is more complicated, but it looks so cool! I learn stuff with EVERY video you upload. Honestly a great resource. Good times.

[@stormlight4184]

Great job on the restore. As a new guy to this hobby thanks for taking the time to explain what you're doing and why it needs to be done.

[@hydrolisk1792]

Also check out bandersontv channel. This is all he does on there. Also subscribe to bandersontv and this channel. Both awesome channels and great people.

[@jwl9286]

Just for fun you check the bias! wow, wonderful fantastic! I haven't even finished watching this video and had to stop and say how helpful it is! what a great job describing it, thanks

[@CraigPetersen12f36b]

The buzzing noise is most likely nearby switching mode power supply's, ( wall warts) LED lights, compact florescent fixtures, etc. The noise is always appears as regularly spaced lobes across the band (every 33 to 66 kHz or so). The only way to get rid of it is to disconnect the offending device. However some of this interference may be generated at a neighbors house and is being coupled onto the electrical wiring, up the drop line to the transformer and down to every house connected to the transformer.

[@TerryMcKean]

That's a work of art, that set. Thanks for sharing, Dan, and nice restore, too.

[@chrischristopher7069]

What is the machine called that you apply various amounts of volts without needing to use batteries ?? You could apply 12 volts or 9 volts as needed.

[@VintageElectronicsGeek]

Another great repair! And, the good ol' days when smacking something to fix it! :)

[@alvarovaldezquintero1928]

Buenoloquieroenespaño

[@klafong1]

This was a Portland radio. KXL, KOIN, and KGW are on the pushbuttons. KXL moved to FM a few years ago. KOIN and KGW disappeared from the radio dial decades ago; these respective callsigns stayed with their television sister stations.

[@nunyabizness199]

I noticed that myself 😀

[@TonyFleetwood]

yay! love ur vids shango! when i was in the Marines i was stationed across from a radio platoon, and they always had stuff apart over there... i think i had the wrong job...

[@Lockemeister]

The buzz you hear could be broadband from your cable system. (If you have a cable system for cable TV and internet). Try other areas of the house. Try disconnecting the cable (if you have one) from the outside of your house. I have a cable modem that radiates all sorts of AM interference hum). Could be something over the power lines and or the land line telephone line also. Could be lighting in your house too. I have high intensity light that radiates in the AM band. The transformer radiates even when the lamp is off!

[@Hunter-xy6qq]

Great video Shango, you're a great technician.

[@chrysiemeininger893]

Love the old radio's, so does my husband Jim

[@TheFurriestOne]

Sounds like a fluorescent light buzz, but usually have to get close to hear it that strongly!

[@chriscimino7854]

Good to see your videos.That almost looks like a Belmont

[@johnedwards5639]

I have that same exact buzz on all the AM radios in my home, including on my battery-operated Superadio. I suspect LED bulbs, but haven't had time to do a trace. --W6JE

[@emorris272]

Did you check the resistors?

[@doogie812]

Love your stuff! Would love to fly out work with you. Let me know if that would be cool. I'm an expert on ctc16's and most other chassis. Actually I'm very good with most electronics. But there are things that you know that I don't. It would be fun to spend a couple of weeks with you and see what happens. Love your work, keep it up, Doogie

[@markmarkofkane8167]

That eye tube is cool!!! Thanks for another interesting video!!!

[@stevenking2980]

I have a Hickok TV-7/BU tester like that. I wonder what the diff is? Yours is a TV-7/AU I believe? As you stated they are badass testers! Shango I fired up the old curtain burner the other day and she still works! Good work sir! Steven

[@z13swee]

Really cool radio there, and great video aswell

[@seriousorry]

Love the videos. How close to cable tv lines are you? Sometimes they leak and transmit noise. Their not supposed to but they do if the insulation is faulty.

[@baron8107]

Radio looks pretty cool. Why they dropped the idea of a unique aesthetic is beyond me.

[@baron8107]

Jay Bee You're telling me that no-one can afford to cast or stamp a good-looking casing for a radio...

[@off_on_one]

That's a really cool looking radio

[@Synthematix]

Dont some new tubes have a silver colour inside the glass?

[@SoddingaboutSi]

Shango I thought that was getter not tungsten evaporation?

[@shango066]

+Simon Spiers Nope, thats hours baby and lots of them

[@SoddingaboutSi]

+shango066 Cheers

[@ronalddaub5049]

60 cycle hum LOL

[@gregorymalchuk272]

The shiny stuff on the side of these tubes is the getter. The stuff near the top of the tube where the filaments are exposed is evaporated tungsten being redeposited on the glass. On the miniature type tubes, the getter is often at the top, so you can't really distinguish the tungsten evaporation on those.

[@tonyblackmon6356]

I didn't see what you used for the speaker, but I found that black silicone gasket sealer works well, especially if there's a lot of bass on the unit.

[@shango066]

+Tony Blackmon speaker reconing glue. it will never come apart again

[@TimRRT1]

WKBW, is that the Buffalo, NY station?

[@rosieokelly]

You may be picking up some incipient buzz from local lighting..happens often here...nice viddy

[@shango066]

+Rosie O'Kelly Those live repair videos you do are cool, I should try that same day. good stuff

[@rosieokelly]

+shango066 You are too kinda..and coming from a master rebuilder and restorer like you, that is some compliment! I so enjoy your projects! Love to see you doing a live repair! Happy Easter!

[@stevenking2980]

+Rosie O'Kelly hey I will check you out! If you got a plug from the "mighty Shango" then you must have some great stuff! Ok, I'll bite. I'll check you out. If he says u are good then I'll subscribe too! I don't see Mr. Shango do that often, that freaking cool! Well thanks to both of you for another purveyor of fine videos! Happy Easter! Steven NC

[@stevenking2980]

+Rosie O'Kelly subscribed!

[@stevenking2980]

+shango066 wow that is a good idea huh? You know I love a long repair video! Great idea. Shango I wish we could watch you actually fit the parts and solder them in, and watch the whole process. That would be epic. Have a good Easter weekend man. Thanks for the videos... Steven

[@Andrewausfa]

Nice looking set, thanks for showing

[@chetpomeroy1399]

If you have nearby, above-ground power lines, they might have bad insulators. Some utility companies, if you notify them, will replace the insulators, which would likely solve the problem. As we all know, AM signals are quite susceptible to buzzing from power lines with bad insulators. Nearby fluorescent lights with weak/bad ballasts/capacitors can do the same thing. It certainly isn't from the radio itself. This makes DX-ing at night almost impossible to do.

[@runardamnes6359]

+Chet Pomeroy I would try a capacitor on the heater line/leads very close to the mixer tube socket. Simply twisting them can also do the trick. It COULD be that some RF junk from the power lines "infects" the cathode or it has some kind of a ground path through wiring layout.

[@GaRbAllZ]

+Chet Pomeroy Fukushima getting closer?

[@chetpomeroy1399]

Runar Damnes Interesting! I'll bet that would work, or at least mitigate the effects of the 60-cycle buzz coming out of the loudspeaker!

[@chetpomeroy1399]

Dennis Hill Decades ago, I remember as a youngster that we had a roundie color television set in the family living room and was sternly instructed, and reminded, of the 4-foot rule when operating the set (Sylvania), so my exposure, even after many, many hours of color-television viewing, was minimal. Indeed, color TV was an engineering marvel of those days. Even back then, many people knew of the X-radiation emitted from these operating sets. However, the techs who worked on these things weren't so lucky; as they were *very close* to the unshielded HV rectifiers, shunt, damper, horizontal oscillator tubes, as well as the back of the CRT itself, and were exposed to dangerously-high levels of ionizing X-radiation on a daily basis. One can discover the actual level of radiation these electronic components emit by holding the probe of a properly calibrated Geiger counter next to one of these tubes. I've heard that later versions of some of these tubes have some sort of lead shielding. Obviously, this is nothing like what would happen if one were to ingest a hot plutonium particle from the Fukushima reactor, the effects of which would be more immediate.

[@aristocrat_000G]

thought the "bypass" cap solved the 60hz buzz? then it appears again?

[@davidharrison4881]

Back in the 70's I used to go the Thrifty Drug Store to test and buy my tubes there.

[@natarii]

I bet the baby doll would enjoy smoking some of those capacitors

[@shango066]

+agirisan I need to find it, no clue where it is now.

[@dictare]

+shango066 CPS probably took baby after you used deoxit on his diaper rash.

[@c.brionkidder9232]

KGW and KOIN, hey that's here in Portland!

[@PelDaddy]

You used an X type safety cap across the line, right? I couldn't tell by that one you held in there.

[@PelDaddy]

+PelDaddy And thanks for your video, BTW.

[@taz7264]

would you not trust the MOD spec rather than comercial sencore? im just asking

[@Kennynva]

Mine buzzes like that in the middle of the broadcast band....from a light in the house.

[@jeena256]

Great work, Dan. Subscribed!

[@shango066]

+jeena256 Neat when someone figures that out!

[@kyoudaiken]

Where was Part one???

[@nor4277]

I no this a old video,did you sell that one yet,if not I would be interested in buy that one ,I love the tuning eye,I built a tube tuner years ago with a magic eye tuning ,my x has it

[@jerrycarriera8648]

That buzzing sounds like you have a dayburning high pressure sodium streetlight nearby.

[@NJPurling]

If it is crap resident on the AC line a Schaffner filter might help. Move the set outside on a long cord, away from EMF. If it is still there is there anything being transmitted as a digital sideband by that station? I appreciate the set has probably been returned to it's owner, but the comment applies to any set that seems to have unusual buzzing at odd places on the band.

[@emorris272]

I've heard cameras causing interference.

[@MichaelBeeny]

The buzz might be your cam. Some do make radio noise, but as you said so many lamps give off all kinds of RF. Ahh progress!

[@nor4277]

If you ever get another tunning eye radio that has been restored by you ,I would love it if you would keep me in mind as a buyer it's hard to find radios that have been restored right and made safe,thanks for another great video ,

[@c.brionkidder9232]

There is a good guy here in Portland with a great variety for sale. Search Burlingame TV and Radio Portland Oregon

[@justsumguy2u]

Your conclusion is correct; the interference is caused by factors outside of the radio. I have probably 40 radios, and every single one makes the same noise at certain parts of the dial. The problem is that with today's cheap electronics and appliances, no one bothers to put in ac filtering (such as a 5 cent capacitor) to kill the RF noise. Refrigerators and a/c units are notorious for it.

[@ricardosalesdemello4130]

yeah! shango gostei o Radio ficou ótimo!!

[@tonyblackmon6356]

I was told that the noise you hear in the form of a buzz is probably from the power lines because they use broadband through the power lines, at certain frequencies, and it is worse when you have a new digital power meter.

[@iliyastebnyov813]

If the buzz is not at whole wave band, it can be RF interference from the industrial plants or some side interference from the another stations (military communications, for example - they are all encoded, but can leave the buzz at the broadcast bands).

[@dondesnoo1771]

50k hours surprised. No wax oozing out everywhere..😁

[@jacobs.preciado1889]

This buzzer is a armonic resonance of a electronic device.

[@koltonhennessey]

where's part 1

[@hannonm]

those caps remind me of cat poop! The buzz could be a Mica in the IF.

[@bobtk2352]

It doesn't have SMs in the cans.

[@rexoliver7780]

Have two tube testers just like that military one at the VOA Tx plantAlso Hickock testers.

[@MisterTalkingMachine]

This youtuber, Uncle Dough, works a lot with guitar amps and other tube equipment. He has a video on the cap across the line. On the video he shows that some sets don't require it, while others do. Because it filters high frequency noise, would expect it to play a much bigger role in radios. Would post a link but don't know if YT would tag it as spam. The video is called _The Death Capacitor......Fact or Fiction ????._

[@shango066]

+MisterTalkingMachine I agree with that, it depends on the set or maybe the noise on the line. These radios were built so cheap and every penny was cut form cost, yet every 5 tube radio has this cap so it must be fact that in some cases its needed.

[@MisterTalkingMachine]

+shango066 I just replace it, it's not like it isn't extremely easy. A couple days ago I read the SBE has urged the FCC to improve noise regulation on the AM bands. The article got posted on the ARRL website. Over here it's just awful. I don't know if enough people care about AM to try and improve the situation. Only ones who I think would push for it would be religious stations. Will leave you a link on a reply to this comment, if you have not seen it.

[@MisterTalkingMachine]

+MisterTalkingMachine www.arrl.org/news/sbe-urges-fcc-to-improve-medium-wave-noise-environment

[@joseph9770]

What a tester! They didn't muck around, those things were built up to aircraft standards!

[@CuracaoLife]

Wow! Nice!!

[@steveseifer6784]

Buzz sounded like interference as soon as I heard it. A motor somewhere would do it, as well as a power line.

[@aristocrat_000G]

would price out the rotary springs~

[@moodyga40]

good job

[@manorn]

شكرًا داني على هدا الفيديو الرائع

[@SwingingChoke]

Love my tv-7

[@NJPurling]

That frikkin buzzing may well be a switch-mode power supply in a un-shielded chinese made wall-wart or a cheap clone of a OEM lap-top power supply which is also totally un-shielded. Those damn things are a pain in the arse & please don't get me started on CFL bulbs............

[@andygozzo72]

Very likely, unfortunately, especially the cheapie ones with minimal or no filtering!

[@andygozzo72]

Personally i think they should be banned unless made mandatory for filtering and shielding to be severely improved!

[@wolfgangbeginners-mind2853]

@->00:23 Just get some spring wire and fabricate up some more springs-> www.mcmaster.com/#spring-wire/=1bg4j06 I use spring wire to replace seemingly UN-replaceable funny little simple springs, all the time.

[@cardboardboxification]

The natives getting restless in Gardena....

[@Pete.hooooo]

UK nanny state were not allowed to comment .......We must stay silent ...account s will be monitored

[@hellhound-si5oz]

Sounds a lot like dirty power

[@ricardosalesdemello4130]

Ah hello shango good night

[@tailsdollblack9340]

17:35 total earrape! DX

[@intothevoid9831]

If you didn't import millions of muslims and third worlders into your country you wouldn't have attacks like Brussels or the Paris bombing, definitely not irrational to worry about the state of your country. Totally normal to be afraid of third world muslims or somali immigrants considering what they do to your country and people over time. Nice job either way, really neat art deco cabinet. Wards made some really funky radios in this time period, I restored one awhile back with an eye tube, though it was a transformer set.