Channel Master 8 Tr Deluxe Vintage AM radio repair

[@barryfleischer6553]

Your're amazing. Thanks for the video. I love these radios, it;s so nice to hear one come back to life.

[@jmcgatkinson]

For many years, the family listened to an 'AllWave' version of this radio; MW-SW. From Australia, received BBC world service, as well as Alistair Cooke's 'Letter from America', and 'Voice of America' on the SW band. It got many years of use, then put aside because it 'whistled' and sounded as if it had flat batteries when they were replaced, so took it apart, and decided to replace all the electrolytic (gray-green) capacitors, using 'preferred values' 33uF, 22uF, 100uF, (instead of 120uF) etc. I know that there was electrolyte residue on the circuit board, which I cleaned away, and since I had it apart, put the xx cent replacement electrolytics throughout.. Working very well now..

[@DAVIDGREGORYKERR]

Have you thought about building a radio around a balanced Quadrature Sampling Detector which could be made to drive a RF phasing network to recombine the I and Q to feed the demodulation circuit then onto a speaker. the QSD would be driven via a clock I.E. ((fin+455)*4) which drives a Johnson counter that drives the QSD, the output from the QSD will be 455khz

[@Pyridox]

Thanks for the video. They really crammed the components onto the circuit board, so it would fit in the small radio case. That's back when there was only discrete components, no IC's.

[@douglashoff95]

It's always fun to get something like that going again even though some think it might be a waste of my time

[@12voltvids]

Just a fun project. No money in this.

[@jeffking4176]

Interesting. I’m learning much about these old radios. Have been DXing for 45++ years. Recently have started a very modest collection of old “new stock” . So far all work. Some claim to have over 14 transistors. (I say “claim”). Since I know very little about electronics,these are all interesting.

[@12voltvids]

I have a few more old radios. A few are not in great shape. I have an old Panasonic shortware around somewhere that I will look at if I can find it.

[@Buzzin46]

I enjoy watching your rehabs of old radios. I am currently working on a Channel master 6 transistor Mod # 6527. I need help woth identifying the + and - on the grey caps. There is a black dot does that indicate + or -? Your help would be greatly appreciated.

[@btouw8558]

i would say it's worth the efford, old radio's need love too, i want to see an iphone do the same after 50? years.

[@ninaevans4501]

Good video, and glad that you took the time to get things up and going again.

[@bonasperry8747]

Awesome little radio

[@electriccity2980]

i have a radio with a circuit board like that i hear they are very easy to lift a trace any stuff any recommendations on a soldering iron temp? don't want to destroy so trying to be as careful as possible.

[@Kennynva]

Ive repaired a few of the Sanyo/Channel Master radio..like that..and when I started, there was zero sound heard from the speaker...the reason was all them gray caps had to be replaced...and that fix everyone Ive worked on..some have 12 of them..

[@12voltvids]

I am sure they are all bad. I just changed the one that was causing no sound. The owner of it really hasn't decided to spend any money on it. Even just a few $ for parts. So when he decides what he wishes to do I will proceed with replacing them all. Just like I have on the vintage tube sets. Those owners wanted them fixed.

[@jessede1970]

Hi 12volts how can I get my fm transmitter to go further from my house it goes down the road and then it goes out of range how can I get more range from it many thanx

[@cttv90108]

Cool old radio, on marine band you might be able to hear hams on 160 meters running AM at night.

[@m.k.8158]

Under good conditions...WWV at 2.5 Mhz and CHU at 3.330 should be receivable on this set.

[@BlankBrain]

Klein makes some nice slotted screw holding screwdrivers. They really save time and aggravation.

[@zx8401ztv]

Yes they were a minefield, but interesting never the less :-). Do you remember the rounded square plastic ones with two tiny controls on the side, they looked like a ladies powder compact, but bloated, one side had holes for the speaker.

[@frac]

You may want to go on eBay and do a search for "PARTS GRABBER PICK UP". Once you have one, you can't live without it. They're strong enough to get a screw thread started.

[@rogertyler3237]

I Had An Old 4 D Cell Philco Radio Ahh Mid 50's. & It Had Very Lo Volume Output. But It Had A Huge Speaker In It & When I'd Put My Ear To The Speaker It Had A Good Sound. Espcialy When I Had A Country Station On It.

[@jungleman4921]

Very good repair !

[@m.k.8158]

I don't know if it's normal...but the audio sounds somewhat distorted-those old units were not high fidelity by any means, but they were usually clearer than this.

[@russellhltn1396]

My guess is that more caps need to be replaced or need to be reformed.

[@nor4277]

I never seen a marine band before,does that pick up ships or something,I wonder if it was a popular type of a radio or one made for a certain area .nice save to that radio ,considering how old it is,your friend should be very happy .neat radio

[@Radiowild]

These were very good radios except for the low quality electrolytics. I just re-capped a 6515 with a RF stage. It's a terrific DX radio.

[@annierenard5954]

Dave Capacitor fixed it AGAIN nice repair

[@12voltvids]

I am sure the others are probably bad too, but this is not a money maker, more of a show and tell, so show an old beast, and it is producing sound again. Only problem now is there is nothing to listen to on AM radio. 3 sports channels, CBC, traffic, news and a talk station. 2 Punjabi and a Chinese station. Nothing to listen to on AM>

[@annierenard5954]

mayby your "client" is an older man and addicted to this radio "emotional value" is you said I appreciate it very much you took the time to repair this for him

[@12voltvids]

Yes, correct. The same reason I still have my grandmothers old Sony transistor 6 AM radio. I remember going to her house and she always had that radio playing. Used to run the dam thing all day listening for the cash call. They would announce the amount, and then randomly phone people. She always had the amount written on a scratch pad by the hard wired phone, which back in those days was attached to the wall. I have the actual old rotary phone too, and that phone is attached to the wall in my hallway, and yes it still works, and IS connected. I can make and receive calls still on it despite it being rotary dial, as we are still on a GTD5 switch with works with both pulse and tone dialing.

[@tonycosgrove6433]

Nice one good video I was wondering if you can help me i have a pioneer BDP -450 3D blu-ray player only had it about 2 years l hardly use it I switch it off when not in use the front panel display started to go dim over the last 2 weeks and now the display doesn't work now apparently it's a common fault on these players there's loads of the same model with the same problem if you can throw some light on the problem be much appreciated.

[@tonycosgrove6433]

Jim James hi I had a new power supply put in and it was still the same

[@catsbyondrepair]

Get a Sony problem solved

[@Sloxx701]

Check for cold solder joints / cracks

[@rodolfogomez382]

It is a very old radio sure all the electrolytics capacitors are dry, the best option change them.

[@Kennynva]

I have alot of old CM, Sanyo radios like this...and all of them need the gray electrolytics replaced, the black dot is the negative terminal of the caps....nice radio..I do not have one of these..

[@umajunkcollector]

aaah yes, the marvel of its time, the POCKET transistor radidio.

[@rogertyler3237]

Well At least You Got It To Work.

[@garymckee8857]

I had a set of Channel Master walkie talkie's when I was a child they didn't have much range to them.

[@markmarkofkane8167]

Great to see another piece of junk resurrected. I don't mean it's worthless. Just a novelty.

[@12voltvids]

Don't laugh, those old vintage radios go for quite a but at the local antique store. They had a radio just like this one and it closed on an auction for 125.00 US! I just picked up 2 vintage tube radios in wooden boxes for restoration projects. A Marconi and an old GE that go back to the 30's. To a collector these units are quite valuable. To the fella that ownes this one, like my Sony transistor 6 it has sentimental value. He has had it since he was a kid. My Sony TR6 as my grandmothers radio, and I remember her listening to CKWX on this thing every time I was in her house. It as rarely turned off. I don't listen to it, just keep it, and like my other collectables of value will let my kids fight over them. My old Strongberg Carlson radio is work a good chunk of change.

[@gartmorn]

I love these fault finding videos but like you say the build quality and layout is atrocious! I must try and get an old radio to play around with!

[@russellhltn1396]

Looking at eBay, someone paid $65 for one in good condition and had been recapped.

[@12voltvids]

Well there are fools born every minute. People pay way more than things are worth when bidding wars start. I have sold things for ridicules amounts. Get a few computers going. Connect one to my home internet and post item. At bids roll in, log in from my work computer and bid against myself. After all if I win, I can always cancel the bid right. Pump the bid up, and sooner or later a sucker enters a stupid amount, and I don't counter bid from the other account. Bam, they just bought it for a much higher price. Have sold a few Betamax recorders for well north of 500 that way. You get someone with a bunch of Beta takes they want to play, and emotions take over, and the sky is the limit.

[@misterhat5823]

In other words, you're a crook.

[@12voltvids]

Not at all. I didn't force anyone to bid for it. I just played the same game that everyone else does. Shill bidding is a fact of live on ebay. That was about 10 years ago when I was disposing of much of my old production gear. I unloaded my old betacam, and professional hi-8 gear, and some old beta decks. I wanted to get as much as I could, for it. So I bid against it, and had a few friends also pump stuff up. This is how you keep them at bay. If it is always the same bidder pumping up an auction they get suspicious but if you have 6 or 7 friends that play the game.... Oh shit, I just let the cat out of the bag. Yes everyone does this. I stay clear of fleabay, or if I want something I put in 1 bid, and if someone outbids me, they get it. There is nothing I want bad enough to get in a bidding war over, because I know how it works. A good percentage of bidders are "ghosts" just there to drive up the price. Noe excuse me while I go bid on something I have no intention of buying.

[@markanderson350]

Just checked, I guess they have value but not much over ten bucks.

[@nattakiet1]

I was like this in 1977..

[@rogertyler3237]

Some Of Those Screws Are Made Of Pot Metal.

[@johnbellas490]

Aaahh Channel Master !! They had a big plant on the East side of Ellenville, N.Y. that produced TV antenna's for a LOOONNNNNGG time. I live south of the mountain (Shawangunks) from there. I have a C band dish branded by Channel Master, maybe they even really made it, the dish that is a 10 footer. The LNA is made by another company, don't remember who right now. but yea it still works there are some programs still on C band, not many though ! This channel Master plant moved to either the Carolina's or Tennessee somewhere, Now they make the High DEF T.V. antenna's.

[@12voltvids]

I have a channel master 10' BUD on my roof with a couple of Chaperrell feed horn, CalAmp C band and Norsat Ku LNB. Was using it for music channels until they changed formats. Now it is just waiting for me to take down and scrap.

[@johnbellas490]

Now that you mention it I think my LNA was made by Chaperrell along with the downconverter being the same manufacturer.I think the LNA was a 55 degree unit.

[@rogertyler3237]

That's Why I Use Magnetic Screwdrivers.

[@12voltvids]

They are. The screws are not.

[@mervace]

Very cheap, why would you not just replace the 4 or 5 10cent electro caps and make a good reliable repair? Instead of screwing around with the coils with a metal screwdriver to boot, Did I mention you are very cheap?

[@mervace]

And you actually refitted an old cap, LOL

[@12voltvids]

Electronics Tech No money in this repair. Just wanted to get it working. To show the part that caused the fault. I also don't have all the values of caps in stock. That's 10 in gas to drive to the big city to buy some of shipping charges to order them. Did I mention that I am not being paid for this job? Do you work for free?

[@12voltvids]

Electronics Tech Yup I did put the old ones back in because it tested good on the cap meter and esr tester. Not all old caps are bad. What makes electronics fail is 2 things. Over heating and seal failure which results in them drying out. If the seal is intact then the electrolytics won't dry out. I have devices with 50 year old caps that are still working fine and being used. It is the high frequency or switch mode power supply that kills them quick. Low voltage DC doesn't stress them. This one likely failed due to mechanical stress. It is one thing to go recap a classic sansui or McIntosh receiver that is worth 1500.00. Then you put 30.00 into caps, but an old am radio that is not going to see much of any use and has no value.

[@12voltvids]

Here's the thing.. Anyone can just go in and change all the caps. If it is a cap problem, you will solve it guaranteed, but did you learn anything? Did you learn which component caused the fault? No. When you can go in, and change the bad part on the first or second try, by using test equipment to isolate, and replace just the bad part, and nothing else, this is the sign of a master technician. The rest are just amateurs. The pros know how to troubleshoot to the individual part that has failed. The analogy that the others are going to go bad is simply not true. Most capacitors never fail, and when they do, like I stated before it is generally due to an overload of the specific part. Now some people will bring in a high end amp or receiver and request that all the caps are changed, and that is fine, they are paying for it, and that is a different situation, but in 99% of repairs I did when in the business, the only parts that were changed were only the ones that had actually failed. We would never just start changing parts to "pad the bill" as some shops would because we never knew if it was a sting by some reporter. A few local shops that had a bad reputation of "over repairing" did get caught up in it. They would be baited. A TV or VCR was taken in where another tech had intentionally put in a bad part, and many shops that got caught were claiming that a bunch of parts were bad, and giving big estimates. Never played that game. At the shop I ran, only the actual fault was repaired. Honesty keeps customers returning.

[@mervace]

yes some good points there, but when I was doing repairs I would always do a little preventive maintenance and customers always were happy with that when explained, I never did any free repairs even if I only charged 10 or 20 dollars for a fun little repair like this one, and I never felt I was under examination for over charging . Decades of experience should never be free

[@greentree320]

U r wearing a made in Japan watch and calling Japanese radio junk?

[@12voltvids]

The attitude towards anything from Jalan in the 60 and early 70s was the same as many people's attitudes to Chinese stuff today.

[@greentree320]

@@12voltvids i dont know that time but I love made in Japan and so do you I guess.. it was a good informative vedio. Plz keep uploading... Tha ks for replying

[@12voltvids]

@@greentree320 I grew up in the 60s. When the first Japanese products arrived they were seen as cheap knock off's. The domestic suitcase record players for example by companies like seaberg used metal garrard, bsr or dual changers and were made of metal and wood. The Japanese national Panasonic, plastic everything. Toys from USA and Canada metal, japan plastic and they broke on Xmas day. They got much better in the 70s and by the 80s were considered the best. Korea was next. Goldstar and Samsung were considered absolute junk. Now they are the top brands and the same thing with China, but things move much faster now and china has fantastic products. As developing countries enter the high tech world there are early days where their stuff is sub standard. Then they figure it out.

[@greentree320]

That's new to me.. m nostaligic about old time tech and art in that time.. ur experiences are great and we learn from it

[@vincentyan9319]

I remember when I was a kid, we used to have a lot of jokes about Japanese products. The one I still remember is about alarm clock. They are very loud but never on time.🤣🤣🤣

[@UnkyjoesPlayhouse]

that is the ugliest design I have seen by far..

[@umajunkcollector]

it's looks kewl!