Congratulations on bringing it back to life! Part of the fun of the challenge is taking something that looks hopeless and making it work again. Sounded decent too at the end of the video. Nice work!
I am glad to see you have been reinstated to you tube and I hope that you never get bumped again . you are a great asset to youb tube and wish you a very happy and healthy new year and all the best
Nice to see you saved the radio to survive another decade from the trash. Your area is like mine with all the planes flying over all the time! I cop it a lot here over my house. Happy New Year 2017.
I'd like to see the earlier video when or if you post it. My mother bought a new Capehart in 1951, either the 1005 or 1006 model that is still at her house in dry storage and minty cosmetic condition. I have the Sam's on it and plan on restoring it when the day comes she is gone and it has to be moved. Hers has a single 6V6 output, and a simpler tuner section (as per the schematic) and I know the radio was basically dead back in the 1970's when I used it as a record player as a step up from my horrid Wards Signature fold down stereo and buying components. As a kid I know it sounded pretty good with it's single 12" speaker as my mother would stack up 78's on the 3 speed VM changer. She actually wore out the platter gear on that changer! But I have a replacement changer pulled from a true Crosley of the same age.
Great video and explanation of everything that you have done. I have a Capehart 1009 installed in a cabinet. At this point, I can't figure out how to remove it. I've taken out 3 machine screws which come up from the bottom shelf, and have removed the 4 knobs and the noise control switch. My guess is that there are screws hidden behind the bezel, but if this is the case, I'm not sure how to remove the bezel without breaking it. If this isn't the case, then I'm still stumped. Thanks.
The chassis looks like my Halicrafters S20r lol. I bet there is not many in Australia. I love this stuff got a couple Australian made 1930s console radios going last year, It's good fun would love to get a FM Valve Radio to have a play. Your Vids are awesome Shango...........
Great job! Love the way the dial light switches. Isn't it great to be right? You figured those capacitors weren't bad. I appreciate the way you seem stumped even though you come through. Again Great Video and happy new year.
There is no contact in a trimmer capacitor like a resistor, its got a mica wafer in it and plates squeeze down to increase capacitance. Spraying it would destroy it. And this is a super low value, 4-10pf just a few mm or lead length has a huge effect
it happened the same to me in a telefunken...fm and sw worked fine but mw and lw gave lod crackling just like SMD...but as there almost never any case of SMD in european radios the culprit was a trimmer cap exacly like that one...in my case rotating it back and forth solved the issue
That FM demodulator circuit I would think is a ratio detector, rather than a Foster Seeley discriminator, which needs more IF stages with a limiter at the end driving that transformer. If you have the ratio detector you can use the same procedure to align it to center, but the performance from it will never be what the FS discrim can be for fidelity. Poor high frequency response, along with some distortion that you'll never really get rid of. I chose a ratio detector for the first few FM sets I built, but quickly went to the discriminator, and added the necessary IF stage(s). My last vacuum tube set and my only solid state unit used a balanced bridge discriminator, which is the best of both types.
Those large color coded capacitors (upper right corner)were horrible even when this equipment was relatively new. I remember changing them for leakage in the late 60's in equipment that was not very old.
As for the failed oscillator it can be tricky to get them working when the won't fire. Your technique for diagnosis is pretty much the same as I would've done. Sometimes just a touch of the screwdriver to the tank coil would get it going, and it would remain working until the set gets shut off. On powerup later on the same thing would have to be done. Like in your case it is usually a bad capacitor, and a type that you would think would never go bad. Also don't forget to check for any temp coefficient rating that might apply.
Nice job figuring out the oscillator trimmer cap wasn't functioning 100% Have fun with the radio now while painting. It will be short-lived though because you "won't" have fun scraping off the paint blots off the cabinet later. Happy New Year!
IF SM disease? 3 gang variable cap in fm section, suggests RF amp and self oscillating mixer. (or double tuned rf front end). Actually there IS another tube in the FM section, that must be the RF amp, looks like a 7 pin, so probably a pentode, but if it is a 9 pin then probably a cascade dual triode.
Hey we should put together a virtual AA cannon for you to shoot at those airplanes. A real, inert cannon with old school sights, and a ham band radar or image analysis to guesstimate whether the shells would have hit or not. It's ironical that the vehicles whose noise can bother the most people (by flying over them) are also those that are under the most lenient noise and emissions control. Same in various other countries.
Well i feel better you got it! - cause me not 'grasping' this, yet, i guess, ask [no one here], then wait for Big Picture in head so i'll find it. hmm . . . Nice Search info! You Win =]
I have a grunow 750 with a bad osc coil, the windings turned to green dust... schematic says the coil data is on page 7 of the service literature... of course is the one page of the schematic was never scanned on to the web anywhere, ....it figures......so it's been wind , retry, wind, retry etc etc...
is that de oxit that you were for contact cleaner if it is how do you like that stuff there is a electronics store in sarasota florida that sells it but its 8 dollars for a 4 ounce can i aquired a heathkit sb 101 with dirty switchs and contacts and need to clean them any opinion would be greatly aprichated
ok thanks i have put the heathkit on the air the guy i got it from did not know how to even use the radio and its almost museum quality its that clean ok thanks
i would replace the capacitors in that thing, seems heathkit used junk electorlytics because they always seem to be shorted and burn the power transformers up. good way to render it junk and have serious regret
i plan on going thru the whole radio including the power supply but thanks for the tip send me an email my email good on qrz so i can send ya some pics of it then one day iam going to get my heathkit sb 102 going 73 sir and happy new year
yes and no, you'd have to change the heater connections slightly, and reduce ht to about half, better would be ECC85/6AQ8, as its characteristics are nearer to a 12AT7/ECC81, but still needs the heater wiring changing
