Harry Brown gave this radio to his granddaughter, probably in the 1960's It has now come to me for repair. Apologies for the sound quality in the first part of this video - I had microphone gremlins.
Пікірлер: 73
@maartenschapendonk63458 ай бұрын
What a nice little radio with a great story.
@eddyaudio5 ай бұрын
Full Marks Marks Don in Getting the Harry Brown Radio with HMV 61-51 parentride I like your new Rigol Signal Generator the old Leader did a sternly job Best Regards Ian,
@davidstephen53638 ай бұрын
A great learning experience. Felt as if I am sitting beside you while you are working on this vintage radio. Thanks Don…
@Donno3088 ай бұрын
Cheers David. Glad you enjoyed it.
@mikecass83067 ай бұрын
Great repair, thanks Don 😀
@exeterslab77818 ай бұрын
Well done Don. I've found those Nipper chassis' to be extremely robust in design and are quite easy to get working again. Great homemade case too.
@Donno3088 ай бұрын
Hi. Yes these chassis were pretty good, although the output tranny seems to be a bit of a weak point. Nice little piece of family history though.
@domtrimboli62388 ай бұрын
Nice fix Don, I'm sure the owner will be very happy and proud to have her grandfathers radio live again. Well done.
@Donno3088 ай бұрын
I hope so! Working on yours next. I just squeezed this one in as a favour
@domtrimboli62388 ай бұрын
@Donno308 that one has family history , I'm glad You got it working for the owner.🍺👍
@chrischannon27398 ай бұрын
Brilliant, thank you
@Donno3088 ай бұрын
Thanks. Glad you enjoyed it!
@lyntonprescott34128 ай бұрын
Nice job Don. I'm sure the recipient will be well chuffed. Nice to see the subtle changes you made to make it more attractive without ruining its character. Cheers Lynton G4XCQ
@BrbCb-hj9qp8 ай бұрын
Home made redos are the best
@mackfisher44878 ай бұрын
Nice bring back the family's connection to Harry Brown. P.S. good luck on your MG
@Donno3088 ай бұрын
Cheers Mack. Today I'm trying to get the MG up on ramps to work out where the oil leak is coming from. Not so easy - it's too low. And it's 38 degrees outside ... but I only get one weekend a week.
@philipblick88878 ай бұрын
Great video congratulations from Auckland Aotearoa 👏
@Donno3088 ай бұрын
Glad you enjoyed it! I just bought a NZ Columbia radio so that will be coming up soon. Cheers from across the ditch
@philblick49558 ай бұрын
Most old valve radios ended up in cow sheds cockies used to reacon cows always produced more milk with them blaring away.
@Donno3088 ай бұрын
@@philblick4955 Yes, a lot of them ended up that way. I've even seen console radios sawn in half and used to keep the cows happy.
@iantyler40458 ай бұрын
Hi Don. Nice restoration. A tip I got from the Vintage TV and Radio website was that a 100V line PA transformer can be used at a pinch for an output transformer (Jaycar MM1900) I have successfully used one in an STC 536 radio I restored. They are about $9.00 each.
@Donno3088 ай бұрын
Hi. I've heard that too but I've never tried it. I should grab a couple from Jaycar to keep as spares. These HMV chassis are notorious for open circuit output transformers.
@Stephens8x6Workshop8 ай бұрын
What a super little job Don. I build my own amateur radio (morse) equipment from pre digital designs but post tubes so thoroughly enjoyed nosing into this one with you. No chickens! just an odd fly or two checking your work this time! (ha ha) Looking forward to your next project as it sounds like you are quite excited about it. All the best mate.
@Donno3088 ай бұрын
Hi Stephen, I did most of this one at night. The lights attract all kind of bugs but the flies are pretty active as the weather warms up. It's getting hot now. 40 degrees C today, and it's not even Summer yet! Filming here is always difficult: we live near the airport so there are always planes flying over. They seem to know when I turn on the camera lol. Then there's the train line a block away with a freight train every half an hour or so. Then there's barking dogs and the neighbours getting drunk & singing karaoke. Add chickens to the mix and it becomes downright impossible! The next radio is a 1930's STC brand console. I don't own this one either - it's a job for a friend, but it promises to be interesting. I just hope I can get it working!
@Stephens8x6Workshop8 ай бұрын
@@Donno308 Oh mate I feel your frustration. I live in a terraced row among many so I have several households no more than 30 mtrs from my workshop so barking dogs, wailing cats and dysfunctional neighbours are a pain. Summer is the best time for me to film as I can start at around 4am knowing I have a couple of hours before you hear the crescendo of coughing, farting and toilet flushings from adjacent properties (ha ha). All the best mate.
@RGD-Repairs8 ай бұрын
awesome work there buddy :)
@Donno3088 ай бұрын
Thanks mate. Glad you enjoyed it.
@electrosoundaust8 ай бұрын
Hi Don, we had a power outage just as you were bringing the radio up! It looks like a HMV 61-51. The power transformer is on an angle so as to fit in the cabinet. Really nice speaker grill. Glad you put vent holes in the back though. Quite a nice way of using an old chassis. Hope you’re surviving the heat. Unfortunate fire, but you’d have thought that would of learned from Canberra building an estate next to a pine forest😢.
@Donno3088 ай бұрын
Hi Andrew, Yes, it's bloody hot! We had a 20 hour power outage over Thursday & Friday during the worst of the fire. The fault wasn't fire related but there were no available resources to fix it. Anyway all sorted now and I think they're getting on top of the fire at last. One of my work colleagues is a volunteer firefighter so I guess he'll have a story or two. The Gnangara pine forest used to be on the semi-rural outskirts of Perth but is now surrounded by suburbia. The suburban sprawl is relentless and so are the developers, doing dodgy deals to get their hands on land that really shouldn't be turned into suburbs. And this is the result. Anyway I've been busy with the MG today. I've got it up on stands and I've been pressure cleaning the underside to try to pinpoint the oil leak which, as we all know, is a fundamental part of the design. Cheers
@electrosoundaust8 ай бұрын
Hi Don. I wish I could send you some of the misserable weather we're having here. The humidity has been around 90% all day with that fine misty rain. Fortunately it's not too hot. I should send it back up to Qld and David! The power came back on just after 10am. It sounded like there were a lot of emergency services, 3 choppers were circling until after 11.00pm. So someone must have gone into a major pole. The leaks sound very familar. I had an Austin 1800 as my 2nd car. Really confortable, more so than my friends LTD and with more space inside. BUT, it ate the rubber universal joints like there was no tomorrow and of course leaked oil like a sieve. Keep cool,, I'm sure the heat will head this way eventually.
@jamesmdeluca8 ай бұрын
Greetings: I think it was David Tipton that showed how just measuring the AVC negative voltage even without à modulating signal will allow proper IF alignment. Just keep the generator level low enough to not activate the AVC gain. The negative AVC voltage will increase as the IF is properly tuned. Does not require the output transformer to be functioning.
@Donno3088 ай бұрын
Hi James Yes I've seen David do that. I always keep the input signal low to avoid the AGC messing things up but I might try it that way next time.
@zx8401ztv8 ай бұрын
Don, you have made a massive difference :-D The i.f stages are peaked and it sounds much better :-D I don't think it would be easy to get the scale and frequency together, tracking is a bloody nightmare. I never mess with the tracking, i'm not mad, ok i'm slightly mad :-D
@Donno3088 ай бұрын
I have to admit I don't like to mess with the RF tracking.
@bofor39487 ай бұрын
Was it a surge or was it cooked without any ventilation? Either way, nice job Don and adding the vents should extend the life. Catch you next time Dave.
@Donno3087 ай бұрын
Hi Dave Hard to tell now. My guess is that the OPT went open and the owner took this to be a power surge. Or a power surge finished off the OPT which was already on the way out. Power surges were common in the 80's and the power supplier paid out a lot of money to consumers for damaged appliances.
@DAVIDGREGORYKERR8 ай бұрын
Those people out there who might be interested in following along start with the Car Radios made in 1957 which use vacuum tubes with a 12V heater and a B+ of 12V should be fine.
@Donno3088 ай бұрын
Sounds interesting!
@neilforbes4168 ай бұрын
31:30 No hum? Then the set remembered the words to the song! LOL😁
@Donno3088 ай бұрын
Yes it's a problem when you get leaky filter caps. The radio just hums the tune and you can't hear the words. It makes the news less alarming though...
@neilforbes4168 ай бұрын
@@Donno308 LOL
@steelcity321pb68 ай бұрын
Hi Don, That radio is certainly a surprise! Though functional, the cabinet is interesting. Using a fret saw to cut out the AB speaker front must have took a fair long time. It is not always straightforward to make a cabinet in which to house an existing chassis, and dial. Do you know who manufactured that radio’s chassis: it looks professional? I’d say that radio now performs as good, if not better than it did when Austin fitted it into its cabinet for its first time. Another super repair job my friend. Best regards, Phil
@Donno3088 ай бұрын
Hi Phil. Yes, it's a His Masters Voice model 61-51. They are a nice little chassis. My guess is that he got it from a radio that had been dropped, hence the bent mains transformer, fixed it up and put it in that cabinet. The front panel is Masonite, which isn't very strong and tends to delaminate so it would have taken some time & care to cut the speaker grille with his initials.
@neilforbes4168 ай бұрын
15:27 Perhaps the speaker coil is open-circuit. (If it's the radio's own speaker, that is. If it's your workshop speaker, then perhaps the output transformer is at fault. Just a guess).
@Donno3088 ай бұрын
Hi Neil. You guessed right!
@neilforbes4168 ай бұрын
@@Donno308 Cheers!
@Mediawatcher20238 ай бұрын
@@neilforbes416 old style radios are making a comeback in a modern way
@juanmanuelmoralesosuna8 ай бұрын
Hello from Spain, first of all congratulations on your KZfaq channel that I follow regularly. But I have a question between curious and silly, how do you make those pigtails so perfect? Well, go ahead with the channel and Merry Christmas, it's almost there. Greetings, Juanma.
@Donno3088 ай бұрын
Hi Juanma and greetings from Australia! Glad you're enjoying my channel. To answer your question, I use a small screwdriver form a set of "jeweler's screwdrivers" (about 1mm) and wrap the component lead around that. I use small pliers to push the coil snugly against the handle then pull the screwdriver out and re-insert it into the coil from the other direction and, holding the little coil with my thumbnail, bend the wire to come off in line with the coil or at whatever angle I want . It sounds complicated but it only takes a few seconds. I'll show it in my next video. Cheers
@EsotericArctos8 ай бұрын
The reason for 6IX being different is likely not Alignment, 6IX originally started broadcasting in 1933 on 1240KHz and then moved to 1080KHz in 1935, 2 years later. The dial glass was likely from before 1935 originally. As this was a home made radio, it is likely the dial glass was recovered from a different radio that had been parted out. I always found it interesting that Australian radios would have station ID's onthe glass and rarely had the frequency. Quite different to a lot of overseas AM / Broadcast Band radios.
@Donno3088 ай бұрын
Hi, Yes I think Australia (and New Zealand) may be unique in having station callsigns marked on radio dials. Every overseas radio I have seen has frequencies or wavelengths marked on the dials, and, on short wave receivers, countries. In this case though, the chassis is from the 1950's and, as far as I can tell, has its original dial. I think there is a clue in the fact that the dial cord had been incorrectly installed so that the pointer ran in the reverse direction. In that case, none of the station markings would line up. On checking I realised that the stations that had been stuck on the dial were in reverse order to the way they would normally appear. So it seems that rather than re-stringing the dial cord, he just typed out the main stations and stuck them on in the appropriate places. Cheers
@timflynn32187 ай бұрын
Great watching you work on this. What did you end up doing with the "ground" wire on the power cord? Was it connected, or not used? Just curious about that one.
@Donno3087 ай бұрын
Hi Tim I ended up attaching the ground wire to the chassis. I only left it off at first in case there was any earth leakage through those old capacitors. When that happens it can trip the RCD breaker to the house and my wife gets upset.
@lawrencehalpin66118 ай бұрын
Hi Don. Did you replace that mica cap with something other than a mica cap. If so what did you replace it with. Kind regards
@BaijuGangadharanHomePage7 ай бұрын
Pls indicate with your finger which parameter you are measuring when using analog meter.lot of us are not so familiar with analog multimeter 4:42
@Donno3087 ай бұрын
Thanks for the tip. I'll keep that in mind.
@johnpateman-ct2kv8 ай бұрын
Hello Don John from England here, I loved to see the home made radio repair but at the end of the video you said the dial string was back to front which means the tuning cap was also back to front with regards to the dial plate does that mean the stick on stations markings was to correct this ?
@Donno3088 ай бұрын
Hi John. Yes. thinking about it later I realised that was probably what happened. My guess is that, having re-strung the dial, he discovered that the pointer ran the wrong way, so stuck the station callsigns on the front. I checked and they are in reverse order to what appears on the dial glass so that pretty much proves the point.
@johnpateman-ct2kv8 ай бұрын
@@Donno308 👍
@stuartirwin37798 ай бұрын
I enjoy working on those HMV chassis, although 95% of them have O.C. output transformers in my experience. A tip though; operating a set with this transformer O.C. is a good way to ruin output valves. Did I hear you say silvered mica capacitors rarely give trouble? Not here! I replace them before even powering a set up for the first time. For the last 25 years, I've found almost all of them to be leaky, if they have more than a volt or so across them. The audio coupling capacitor in question may be an ordinary mica type. It'd be highly unusual to use a silvered mica cap in such a non-critical position. Hope that helps.
@Donno3088 ай бұрын
Hi Stuart. Yes, I think it was just an ordinary mica cap. I've also noticed these HMV chassis often have O.C output transformers. It must have been a design flaw.
@stuartirwin37798 ай бұрын
I think it was the fact that they encapsulated them in pitch. This prevented the moisture from escaping. I've found the same even with their TV sets.
@davidk62718 ай бұрын
Hey Don, no Chickens this week? Have you been celebrating Thanksgiving?!
@Donno3088 ай бұрын
Hi. No, the chickens kept quiet this time. The roosters had to go as the neighbors were complaining. They were duly invited to dinner at a friend's place.
@NuttyforNissan7 ай бұрын
That's a HMV 61 51
@moodyga407 ай бұрын
yes 100%
@Donno3087 ай бұрын
Sure is.
@tubeDude488 ай бұрын
To bad you couldn't straighten up that chassis for the power transformer. Good job, though.
@Donno3088 ай бұрын
Yes, I didn't want to risk it. My guess is that the chassis came from a set that had been dropped.
@stevehead3658 ай бұрын
Nice job Don. Are you going to give your wife her toothbrush back?
@Donno3088 ай бұрын
Hi Steve. No, not till I've finished cleaning the carburetors on the MG.