When you replace a output transformer you have to make shure that the primairy side of it corresponds with to anode impedance of the amplifier tubes, othewise you wil get bad sound
nice repair job i just finished repairing another radio phonograph its a ge model when i got it it had a low level hum so i replaced the electrolitics also it had a bad needle i replaced the needle then i refinished the cabinet it looked new just like the day it left the factory john
Thanks! Do you have any videos on cabinet repair and refinishing? that would be cool to see. I haven't tried cabinet repair yet. Not sure if I have the knack.
My hobby is also restoring old radios and your videos are very good. One thing to look for when you have a tuning eye that doesn't close is an off value 1 meg resistor usually located in the tuning eye tube socket. . RCA specified an oscilloscope indicating device when used with a sweep generator so as to make a response curve on the 'scope for IF alignment.
I have a few radios with a tuning eye, which indicates the power of the signal. I have increased the signal strength without using an RF generator making slight adjustments I mark where the if transformer screws are set, and then slowly turn them left or right while watching the tuning eye open or close. I have successfully increased the signal strength to where the tuning eye closes completely on strong stations and improved reception on the weaker ones. Make small adjustments only
hi i am verry intrested in knowing how to fix this type of radios i am a mechanic ive worked 4 ford i am no presently working for a waste & recycleing company ive done in ford basic electrical and electrical component diag classes how mutch more do i need so i can maybe fix a radio i found in the trash its a philco model 37-61 i pluged it in the outlet an il light up but started to smoke im realy intrested in learning just as a hobe thanks
hi!! i would try to use a longer annt. wire!! i have several old sets like this and, they seem to like the longer wire!! you can make one by going around a window frame, making a square . that will give you some 20 ft right there!! my 1936 zenith i did, picks up all kinds of shortwave and hams!! and the eye tube does close without a alimment!! hope this helps!! ed
I noticed that you mentioned Clark Howard on WSB,Are you in Atlanta? Or Somewhere in Georgia? If so I would love to check out your radio sometime!!! I also fool with those damn things and have a few Im working on repairing.
I would have left out the cover on the transformer so that it could cool easier. There is usually no problem with induction to the oscillator. Later radios left off the covers.
Still a nice video on this radio.
Oscilloscope is nice for alignment, but many have been aligned using just a basic signal generator and a good analog VTVM or FET based meter type multimeter. It is easier to see the actual peaking occurring with the old VTVM than on a digital multimeter.
RCA had said cathode ray scope alignment highly prefereable. C20 adjust = minimum capacity peak if two peaks are obtained. C9 adjust = max capacity peak if two peaks are obtained. Connected to 2nd IF trans at Phono terminal strip. Steps 3 and 4 of a 10 step alignment. Seemed pretty involved.
The steps for full alignment do seem involved the first few times you do it.
And yes an oscope is preferable, but a good VTVM or meter based multimeter is a good second choice. The same basic instructions can be followed with a meter - but digital meters take a while to settle down on large swings in voltage. Anyway, think it over and try the antique radio forum to ask for opinions and options.
Actually with the scope, they are not looking for the total peak all of the time. In one step, they are looking for the broadest IF curve if you get two peaks while adjusting C20. This allows for greater bandwidth and greater fidelity. With an analog voltmeter, you can only peak to the greatest deflection which is not the same as the greatest bandwidth.
The 810 I owned in the '70' would actually 'overlap' the 6E5 indicator on very strong stations. Either your reception isn't as good (although it SOUNDS like it's GREAT), or something's different about the way our 6E5's are/were wired or biased. Just guessing...
Hi! As it turns out, I ordered a 6E5 from EbaY and I had somehow received a 6U5 and never caught the error. I ordered it 2 years ago so just popped it in the radio yesterday. Thanks for the help since this one slipped right past me. The 6U5 is not as sensitive a tube as a 6E5.
Just wanted to note to you. The hands of thr radio were really chipped off. I found a similar white paint at Ace Hardware. True Value Navaho white enamel. I scrapped the old paint off with a fingernail. then washed them down with rubbing alcohol. I gave the hands 3 coats per the paint cans instructions. I let dry for 24 hours. Then baked them at 200 degrees for 4 hours the next day. Then let cool and sit for another 24 hours.
My first 810 had no hands at all so I 'made' a pointer by sticking a piece of paper over the shaft (you'll see in the photo I sent)! My new one has hands. Nice job on the paint!
Just another tip... I read that lots of radio manufactures used water soluble paints for the dial numbers. I just blew the dust off mine and took a few hours and used a slightly moistioned Q-tip, (I squeezed out the excess water with my fingers). Actually I used a whole box of them and gently wiped down the dial but was careful NOT to touch any of the painted numbers or lettering. If I was too closed to the numbers or letterinf I didn;t dare get near them.
When you replace a output transformer you have to make shure that the primairy side of it corresponds with to anode impedance of the amplifier tubes, othewise you wil get bad sound
19GN03 3 weeks ago
Great Work my friend :) QC
Quaaludedude714 5 months ago
@Quaaludedude714 thanks!
Lockemeister 5 months ago
Hey, I love the website Nostalgia Air and started reading the Radio Tricians part and then verk nothing! What the hell can you help me out on this?
barronredneck 7 months ago
nice repair job i just finished repairing another radio phonograph its a ge model when i got it it had a low level hum so i replaced the electrolitics also it had a bad needle i replaced the needle then i refinished the cabinet it looked new just like the day it left the factory john
antiqueradioman1950 2 years ago 2
Thanks! Do you have any videos on cabinet repair and refinishing? that would be cool to see. I haven't tried cabinet repair yet. Not sure if I have the knack.
Lockemeister 2 years ago
My hobby is also restoring old radios and your videos are very good. One thing to look for when you have a tuning eye that doesn't close is an off value 1 meg resistor usually located in the tuning eye tube socket. . RCA specified an oscilloscope indicating device when used with a sweep generator so as to make a response curve on the 'scope for IF alignment.
snuffy39 2 years ago
Is that Hammond transformer still in production?
JPa311979 2 years ago
it was still in production as of last year. I bought them at tubesandmore dotcom
Lockemeister 2 years ago
I have a few radios with a tuning eye, which indicates the power of the signal. I have increased the signal strength without using an RF generator making slight adjustments I mark where the if transformer screws are set, and then slowly turn them left or right while watching the tuning eye open or close. I have successfully increased the signal strength to where the tuning eye closes completely on strong stations and improved reception on the weaker ones. Make small adjustments only
maynardcat 2 years ago 2
That is an EXCELLENT idea! Thanks!
Lockemeister 2 years ago
hi i am verry intrested in knowing how to fix this type of radios i am a mechanic ive worked 4 ford i am no presently working for a waste & recycleing company ive done in ford basic electrical and electrical component diag classes how mutch more do i need so i can maybe fix a radio i found in the trash its a philco model 37-61 i pluged it in the outlet an il light up but started to smoke im realy intrested in learning just as a hobe thanks
caretero1111 2 years ago
hi!! i would try to use a longer annt. wire!! i have several old sets like this and, they seem to like the longer wire!! you can make one by going around a window frame, making a square . that will give you some 20 ft right there!! my 1936 zenith i did, picks up all kinds of shortwave and hams!! and the eye tube does close without a alimment!! hope this helps!! ed
lawnking168 2 years ago
Thanks! I will do just that and get a longer antenna wire!
Lockemeister 2 years ago
Korean language broadcast at 6:11...
SchaeferBeer 3 years ago
very nice radio absolutely:-). i love this radios.
mtv70pn 3 years ago 2
I noticed that you mentioned Clark Howard on WSB,Are you in Atlanta? Or Somewhere in Georgia? If so I would love to check out your radio sometime!!! I also fool with those damn things and have a few Im working on repairing.
ontheair323 3 years ago
I would have left out the cover on the transformer so that it could cool easier. There is usually no problem with induction to the oscillator. Later radios left off the covers.
Still a nice video on this radio.
Oscilloscope is nice for alignment, but many have been aligned using just a basic signal generator and a good analog VTVM or FET based meter type multimeter. It is easier to see the actual peaking occurring with the old VTVM than on a digital multimeter.
Great job..
desertbard 3 years ago
I guess I could try that.
RCA had said cathode ray scope alignment highly prefereable. C20 adjust = minimum capacity peak if two peaks are obtained. C9 adjust = max capacity peak if two peaks are obtained. Connected to 2nd IF trans at Phono terminal strip. Steps 3 and 4 of a 10 step alignment. Seemed pretty involved.
Lockemeister 3 years ago
The steps for full alignment do seem involved the first few times you do it.
And yes an oscope is preferable, but a good VTVM or meter based multimeter is a good second choice. The same basic instructions can be followed with a meter - but digital meters take a while to settle down on large swings in voltage. Anyway, think it over and try the antique radio forum to ask for opinions and options.
desertbard 3 years ago
Actually with the scope, they are not looking for the total peak all of the time. In one step, they are looking for the broadest IF curve if you get two peaks while adjusting C20. This allows for greater bandwidth and greater fidelity. With an analog voltmeter, you can only peak to the greatest deflection which is not the same as the greatest bandwidth.
Lockemeister 3 years ago
The 810 I owned in the '70' would actually 'overlap' the 6E5 indicator on very strong stations. Either your reception isn't as good (although it SOUNDS like it's GREAT), or something's different about the way our 6E5's are/were wired or biased. Just guessing...
blasttapes 3 years ago
Hi! As it turns out, I ordered a 6E5 from EbaY and I had somehow received a 6U5 and never caught the error. I ordered it 2 years ago so just popped it in the radio yesterday. Thanks for the help since this one slipped right past me. The 6U5 is not as sensitive a tube as a 6E5.
Lockemeister 3 years ago
And the 6U5 I had wasn't as bright as the 6E5 in my set- that's why I'd use the latter.
blasttapes 3 years ago
Just wanted to note to you. The hands of thr radio were really chipped off. I found a similar white paint at Ace Hardware. True Value Navaho white enamel. I scrapped the old paint off with a fingernail. then washed them down with rubbing alcohol. I gave the hands 3 coats per the paint cans instructions. I let dry for 24 hours. Then baked them at 200 degrees for 4 hours the next day. Then let cool and sit for another 24 hours.
Lockemeister 3 years ago
My first 810 had no hands at all so I 'made' a pointer by sticking a piece of paper over the shaft (you'll see in the photo I sent)! My new one has hands. Nice job on the paint!
blasttapes 3 years ago
Just another tip... I read that lots of radio manufactures used water soluble paints for the dial numbers. I just blew the dust off mine and took a few hours and used a slightly moistioned Q-tip, (I squeezed out the excess water with my fingers). Actually I used a whole box of them and gently wiped down the dial but was careful NOT to touch any of the painted numbers or lettering. If I was too closed to the numbers or letterinf I didn;t dare get near them.
Lockemeister 3 years ago