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STC model 530 Part 1 

Don's Old Radio Shed
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this 1936 STC valve / tube radio has some interesting features and certainly a few challenges.
STC (Standard Telephones and Cables Australasia) was a subsidiary of the UK company of the same name. They were well known for producing equipment for the Postmaster General (PMG) which, at the time, ran the Australian telephone network.
This radio was probably built in STC's factory in Myrtle Street in the Sydney suburb of Chippendale. At that time, Australia, like many countries, was in the midst of the Great Depression. Hard times indeed, with harder to come.
Like many Australian radios of this era it covers Medium Wave (broadcast) band as well as Short Wave. With the developing situation in Europe, Short wave would have been of great interest as a reliable source of news. Radio brought the world into people's homes and I can only imagine the news and events it has brought to its owners over the years
Look over my shoulder as I try to get it working again as it should.
Carls Capacitors and Radio Parts - ebay store: www.ebay.com.au/str/vintageco...

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13 дек 2023

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Комментарии : 66   
@Watchyn_Yarwood
@Watchyn_Yarwood 7 месяцев назад
I say, that is the shortest 50 minute video I have ever watched!! I was very impressed with the layout especially the precursor to PCBs.
@Donno308
@Donno308 7 месяцев назад
Cheers. Glad you enjoyed it.
@davidstephen5363
@davidstephen5363 7 месяцев назад
What a pleasure to watch and learn so much while the master craftsman is at work. Thanks Don for the video. Looking forward for your next episode…👍
@Donno308
@Donno308 7 месяцев назад
Thanks 👍. I'm hoping to have the next part up this week.
@electrosoundaust
@electrosoundaust 7 месяцев назад
Very nice. I don’t know why we just can’t sell consoles. Just watching David doing a field coil from a STC! Twice the pleasure! Nice Sansui BTW.
@retro_tech
@retro_tech 7 месяцев назад
Well, that plug took a bit of MacGuyvering to get fixed! And indeed that chassis looks very comfortable to work on. Great job so far and I'm looking forward to the next video!
@maartenschapendonk6345
@maartenschapendonk6345 7 месяцев назад
Thank you for the video can't wait for part 2
@8000Time
@8000Time 7 месяцев назад
Super!
@stephencopeland238
@stephencopeland238 7 месяцев назад
Really looking forward to the next episode of this fabulous wireless set 👍
@lanini24
@lanini24 7 месяцев назад
Enjoyed your video look forward to part 2.
@Roundymooney
@Roundymooney 7 месяцев назад
Very interesting set Don, your mate will be well pleased. Great build quality as well-must have cost a pretty penny (or cent!) back in 1936! Looking forward to the next instalment-hope the heat isn't too oppressive, here in Cork we're just out of a coldish snap-freezing by night, with today being a balmy 11 degrees!
@Donno308
@Donno308 7 месяцев назад
Cheers mate. Yes, it's built like a brick shithouse, this one. A few curly issues though...
@techobaz55
@techobaz55 7 месяцев назад
Another great video Don, I'm sure you will nail the rest of the repair, just a bit of patience & stay away from super glue,LOL ! This gives me the incentive to keep rolling with my Breville restore too. Cheers Mate 😃
@Donno308
@Donno308 7 месяцев назад
Cheers mate. Yes, I've got it going now but some weird things happening. Anyway it'll all be in the next episode lol.
@BobAndersson
@BobAndersson 7 месяцев назад
What an interesting radio and another great video. The storytelling seems affortless to us viewers but that's down to the skill of the storyteller and the work you put in. Thank you! A Merry Christmas to you and the missus. 🎄🥂
@domtrimboli6238
@domtrimboli6238 7 месяцев назад
Hi Don, I’m very excited to see the radio coming back to life again, can’t wait for the next video. Awesome start so far to part 1, all the best for the next chapter.
@Donno308
@Donno308 7 месяцев назад
Cheers Dom. As Dave said - I'll have it working in no time!
@tubeDude48
@tubeDude48 7 месяцев назад
Coming along, Don! 👍
@barrywatterson7048
@barrywatterson7048 7 месяцев назад
Good on ya mate, You are the MAN!
@klumpy103
@klumpy103 7 месяцев назад
As you say Don, an unusually well organised and neat chassis for this period. Those hand wound resistors were an interesting touch. I kind of like the change they made to the facia to give it a bit of character. I'm sure you'll have this up and running in no time. Seasons Greetins from Scotland.
@Donno308
@Donno308 7 месяцев назад
Hi Klumpy! And a very Merry Christmas and happy New Year all the way from Australia. Yes I guess we'll have to live with that facia as it is so I might as well get to like it! I've already got it running but there's a few weird things happening ...
@iantyler4045
@iantyler4045 7 месяцев назад
The 536 is not so easy to work on. It has a smaller cramped chassis.
@genestatler2514
@genestatler2514 7 месяцев назад
I love this video Don. Really cool old radio. I'm looking forward to the next installment. Happy Holidays to you and yours. All the best from Gene in Tennessee.
@Donno308
@Donno308 7 месяцев назад
Cheers Gene, and a Merry Christmas to you and yours. We'll definitely get it going in the next installment but this old girl still has some tricks up her sleeve!
@lyntonprescott3412
@lyntonprescott3412 7 месяцев назад
Merry Christmas and a Happy New Year from Pommie land. Great Video Don. I like the way you work in a logical progression and are not afraid to admit that you admit to puzzling finds. Great to watch. I'm currently strugging with a Hallicrafters S20 communication receiver. Sent anEmail to David today so may get some ideas from him soon! All the best Lynton G4XCQ
@Donno308
@Donno308 7 месяцев назад
Hi Lynton and a very Merry Christmas all the way from Aussieland! I'd send you over some of our hot weather if I could lol. It will get more puzzling in the next episode!
@GeorgeChristofi
@GeorgeChristofi 7 месяцев назад
Both yours and Dave Tiptons vids dropped in today and the radios look almost identical! That tag board assembly in yours reminds me of a lot of home made british stuff. At least you didn't have to rewind the field coil on the speaker like Dave did!
@Watchyn_Yarwood
@Watchyn_Yarwood 7 месяцев назад
I just finished Dave Tipton's video and was thinking the same!
@Donno308
@Donno308 7 месяцев назад
Yes a bit of a coincidence, that. Almost the same radio and we both published our videos at exactly the same time! If I need any field coils re-winding I'm sending them to Dave, though!
@lyntonprescott3412
@lyntonprescott3412 6 месяцев назад
Excellent work Don. Lucky to have that field coil speaker working. I'm really struggling with one in my Hallicrafters S20. Watch your fingers on that 6F6 they run really hot! Cheers Lynton G4XCQ
@Donno308
@Donno308 6 месяцев назад
Hi Lynton. Yes, I noticed the 6F6 gets really hot. I wasn't happy with the speaker as it was at the end of this video as it was still scraping a bit, so I ended up pulling it apart. You can watch it all in the next exciting episode lol. It really gave me a hard time though. Cheers
@moodyga40
@moodyga40 7 месяцев назад
nice Sansui amp too
@Mediawatcher2023
@Mediawatcher2023 7 месяцев назад
i wish manufactures bring these back with today s technology of course
@Donno308
@Donno308 7 месяцев назад
Yes, they were nice pieces of furniture. They would be great with bluetooth and DAB capability.
@6A8G
@6A8G 7 месяцев назад
Hi Don & a very merry Christmas to you. Thank you for the video - one small suggestion; if I remember the cct diagram correctly, the tone control cap is in the plate of the 6F6, returning via the tone pot to ground. In this position they have a hard life & if they short, you are down a tone pot also:( Thanx again.
@Donno308
@Donno308 7 месяцев назад
Ji and merry Christmas to you and yours. I did end up replacing that tone cap. I've seen a few designs where they run off the plate. Always one to watch for. Thanks
@zx8401ztv
@zx8401ztv 7 месяцев назад
Well so far don it's looking really good :-D The bi carb and super glue was very handy. I really like the massive chassis layout, You can get your sausages in there without swearing lol :-D It's a shame that some pillock bent the toaster rack. It looks like a no stress job, that's great :-D
@Donno308
@Donno308 7 месяцев назад
Hi Harvey Not too sure about a no stress job! I'll get the rack sorted easy enough. That speaker is going to be a bastard to stop it scraping but hopefully I'll get there. The tuning reduction drive is going to be a PITA too. Anyway I'll do the best I can with it. Cheers
@zx8401ztv
@zx8401ztv 7 месяцев назад
If you have never felt stress, i hope you never ever do. Very mentally destructive . Try to relax and not get upset/stressed. I became very mentally ill because of a bad boss that could not give a shit about the workers. Ill shut my gob now lol.
@Donno308
@Donno308 7 месяцев назад
@@zx8401ztv I have been in much the same position - several times in fact and yes, my mental health suffered. Life is too short for that stuff. Overall, fixing radios and making videos is good therapy as the rewards are immediate. Luckily I now have a job I like with a fantastic supportive boss. Yes, they do exist!.
@zx8401ztv
@zx8401ztv 7 месяцев назад
That's wonderful Don :-D that boss is a gem, Do the best you can for that boss. @@Donno308
@richb419
@richb419 7 месяцев назад
Hi Don, You must be right that the trim under the knobs is added. I'm thinking that the large tuning knob was left off when they added a piece of trim there wasn't enough length on the control. Rich
@Donno308
@Donno308 7 месяцев назад
Hi Rich. Yes, it's difficult to work out why that was done. No sign of damage on the inside of the cabinet. It will make it difficult to fit a new outer knob. I'll just have to see what I can do.
@richb419
@richb419 7 месяцев назад
if you have a fostner bit larger tan the knob you could cut a hole in a scrap piece of lumber, double sided tape it where you want the hole and cut to the original cabinet
@Wil_Bloodworth
@Wil_Bloodworth 7 месяцев назад
Really nice work Don!
@stuartirwin3779
@stuartirwin3779 7 месяцев назад
Hi Don. I can confirm that this is a model 530. "53" being the chassis number, and the "0" being the cabinet style. I have a model 680, which is a slightly earlier model (late 1935 to early 1936) that uses the same cabinet design.
@Donno308
@Donno308 7 месяцев назад
Thanks Stuart. I was struggling to find much information on it.
@neilforbes416
@neilforbes416 7 месяцев назад
23:35 The tuning capacitor? Call it "Bill" 'cause it's *"Shortin'"!* (Shorten) LOL😁
@Donno308
@Donno308 7 месяцев назад
And "Milton Dick" - the Speaker (of the house of representatives)
@Mediawatcher2023
@Mediawatcher2023 7 месяцев назад
@neilforbes416 you really have a *short* fuse 😆
@DavidTipton101
@DavidTipton101 7 месяцев назад
Nice going there Don. I have had the 'pleasure' of working on a few STC radios from the late 30s and yours is the cleanest and best laid out one I've seen. That huge capacitor was unusual, I expected it to have a high capacitance and voltage. It is high for a non polarised one I guess. What happened to the front of the radio cabinet? that is weird, is it a different chassis and the holes were out or something? As you once said to me... "you'll have this working in no time" 😉
@Donno308
@Donno308 7 месяцев назад
Cheers David. Someone has clearly "got at" this radio before, apparently using whatever they had lying around. I've found a few caps replaced with the wrong values but probably near enough to work. I'm not sure what went on with that front panel. No clues inside the cabinet. The holes on the inside line up so it wasn't that. Also someone has cut off the end of the inner tuning spindle with a hacksaw. With the extra thickness of the front panel I'm not even sure I can get it working again properly. Hopefully I can work something out. Yep, I'll have it working in no time. Funny, I don't remember saying that. I must be getting old. And my hearing is going funny too - my voice sounded kind of squeaky...
@DavidTipton101
@DavidTipton101 7 месяцев назад
@@Donno308 Haha... you said that on the hologram message you sent me with the clock radio 😉
@thecelticprince4949
@thecelticprince4949 7 месяцев назад
Any idea what type of wood has been used on the cabinet? Its real unusual and nice at the same time. Adds to the uniqueness
@Donno308
@Donno308 7 месяцев назад
I don't know what it would be. I does look unusual but I'm no expert. Cheers
@iantyler4045
@iantyler4045 7 месяцев назад
Very interesting watching this. I have an STC 536 chassis in a cabinet which is the same as the one you called "Butt Ugly" (which came up nicely in the end). The valves in it are 6J8, 6U7, 6B6, 6V6 and 5Y3 which are different to the one's in your STC 536. Also your chassis is somewhat larger than the 536 I have. I believe mine is a 536B. When working on mine I found a lot of discrepancies to the circuit diagram which I downloaded from Radio Museum. Out of interest what chassis did your "butt ugly" cabinet have? (sorry for calling it that but it's the only way of identifying it 🤣) Looking forward to the next part in this resto.
@Donno308
@Donno308 7 месяцев назад
Hi. Mine was a model 556 which was the battery - powered version. At some time it had been converted to AC operation. To do this, they removed one of the 3 IF stages so as to use the spare valve socket for the rectifier valve. It was all a bit of a butchers job and of course there was no schematic. It wasn't the same as the 536 and of course they changed all the valves to 6v filaments but used different valves to the 536. As far as I know the chassis would be the same size as it fitted in the same cabinet. Cheers
@moodyga40
@moodyga40 7 месяцев назад
easy wireless to work on 450 if
@Stephens8x6Workshop
@Stephens8x6Workshop 7 месяцев назад
Well Don, all I can say is you ratbag! Today was going to be my last day in the workshop before Christmas and what do I find when I came in for my lunch? A must watch video from you. And, AND a video from Dave Tipton too! Well that's my afternoon gone as I can't not watch both of you. Only joking, always great to see a video from you mate and to be honest it's brass monkey weather to be in the workshop here in the UK. An enjoyable watch as always. Best wishes of the season to you and yours Don.
@Donno308
@Donno308 7 месяцев назад
Hi Stephen, Well, my workshop's too hot and yours is too cold. We should've found a more comfortable hobby! And what a coincidence with Dave and I both releasing videos at the same time and both about 1930's STC radios! Cheers and Merry Christmas and a happy New Year to you and yours too.
@thanhhuynh272
@thanhhuynh272 7 месяцев назад
Hello from Hobart. The speaker plug is a UX -5 valve base, the same sort used on an 807, the base you took the pin from is UX-6 probably off a 57 or 58 IF pentode. A word of caution though using Sodium Hydrogen Carbonate mixed with Ethyl Cyanacrilate…that mixture still contains Sodium Ions, effectively charge carriers….and i that was one of the field ciol connections in thr pi filter at 450v…Yikes..you could get track-over. Sodium ions and 450v straight of the cathode of a 5V4 don’t mix well. Oh, and something else to help when the cyanacrilate sticks your fingers to the bench or to each oher….have a dropper bottle of acetone handy, it not obly dissolves the cyanacrylate polymer but seems to react and terminate polymerize the monomer too. On my bench there ate two polyproplyene dropper bottles, (scavaged from swarzkopf hair dyeing kits), one with metho and one with acrtone. Odd radio for 1936, I would have expected a UX based valve lineup, something like 6A7 pentagrid, 57/58 if, 75/6B7 det /AF ans a 42 for the output. Look as if here they were trying the very first octal valves. A 6F6 in the output is a pain in the bum because those are so bloody rare compared to 6V6’s. I reckon I have at least 150 6V6GT’s, a few, six or seven 6V6G’s and maybe two or three 6F6’s…one is in a metal can like your rectifier there and one if the others is in a Shouldered G bulb. I can ,t imagine the two are that different and I’d be very strongly tempted to alter it for a 6V6 by changing either the screen dropper, cathode resistor or speaker transformer after consultong the datasheets for both valves…becausr 6V6’s are still literally everywhere. I have a very interesting Stromberg - Carlson here a big cabinet model like this, it is choc-full of UX based valves….a damn pain to get back into a socket up the back of the chassis behind an IF can because the thick and thin pins ain’t that different…guess that is why Octal was developed, just get the valve over the socket and the end of the keyway into the centre socket hole, them spin till it drops and you know it is “good to go” to push it down. Bloody UX sockets, particularly the cheap micenol ones….crack!..Oops, got thise thicker heater pins in the wrong place! This Stromberg-Carlson has a three-gang tuning, a 57 tuned RF, a 6A7 pentagrid, but wait for it…it has TWO IF strips! Two more 57’s, one in each strip and two 6B7S’, one for each strip…one whole strip dies the AGC and the other for the AF!. the output stage is odd too, it has a 6A7 dual triode phase splitter folloved by a class A-B pair of 2A3’s…oh and I just about forgot, it has a 6E7? Magic-Eye hanging off the second AGC strip! This must have beentheir absolute top of the line radio…I rescued it from a scrap metal yard about 20 years ago. Sadly the dial glass was snashed to bits. The cabinet and speaker are OK, but that missing dial glass is a show stopper. There are so many valves in the chassis, someone has put an octal based GZ32 rectifier in there, I suspect it replaces an 83, a very rare mercury vapor version of the famous 80. All in all it is a very unusual Aussie radio, Inshould pull my finger out of my bum and do something conclusive with it as the chassis dOes basically work despite all the old paper caos underneath!
@Donno308
@Donno308 7 месяцев назад
Hi and thanks for the information. I haven't used sodium carbonate and super glue on anything carrying high voltage before, only cabinet parts etc. and I wasn't aware of the potential for it to become conductive. I wish I had used epoxy resin on that plug. It would have produced a better result and probably been a lot less trouble. There is still about 5 or 6 mm of "clean" bakelite between the pins as I only used the superglue/bicarb mixture around the pin itself to hold it firm. I guess I'll just keep an eye on it for now but certainly something to be aware of in future. Yes I've had a few dealings with UX based valves and I agree they are a pain in thee arse. The worst, though are those rimlock valves they used around the 1950s. You risk breaking the valve every time you remove or replace it! That Stromberg Carlsen of yours sounds like a beast! Such a pity about the dial glass! If anyone can help with that it would be Michael Raanan radiomike121@gmail.com. He makes repro dial glasses to a very high standard. If you can find a picture of the original one, or even still have the broken pieces he may be able to help. Good luck with it anyway. Do you post on Facebook forums or anything? I'd be interested to see some photos. Cheers
@petepeterson4540
@petepeterson4540 7 месяцев назад
100 f huh? get some ac unit mate
@Donno308
@Donno308 7 месяцев назад
Good idea! Either that or I'll have to move my workshop inside.
@mackfisher4487
@mackfisher4487 7 месяцев назад
Don you a great person, but please don't talk about the weather I'm in northern hemisphere and its cold. When your cold I'll rub you about my great weather. This is a great intro a Radio console in its prewar living room as seen around the world, however I miss your politically incorrect scantily clad women images. Why is it that it's prevalent on the island (Sorry continent) of Australia versus the lack of politically incorrect images from Island of Caldeira? Question, how do we get that great tech to get a bit more Vivacious, this could cause a jump in his subscribers too Sorry Guys..a little jocularity helps the world go around.
@Donno308
@Donno308 7 месяцев назад
Hi Mack. I did at least put a girl in a bikini on this one. I do get a few negative comments from the puritans out there but overall more people like than dislike them. They always seem to get more clicks anyway. As for the weather, it's bloody hot here. You can have it! I'll swap for some of your cold! Cheers
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