09-02-2024, 08:44 AM
I have to thank all of you for these nice posts that have given me good information and documents that will help me on this radio project.
One of the first things I did before a power up was to look for shorts and to own out all of the coils. They all checked out ok. I replaced all the caps from the antenna to the 2nd detector. When I powered on I got plenty of sound, no stations though. I then did an alignment that seemed to go well but still no stations, just tunable noise. The noise gets quiet when a modulated single is applied to the antenna.
I have used an oscilloscope and and can see a 260 KC wave form when placing the prob close to the ocilator. So I think the coils are still good for now,?
I am waiting till next week to hopefully resume playing with my radio. A couple of things have developed, one I ran out of capacitors and and am waiting on an order of more caps.
The other thing is Morzh ask about nearby by interference. Well I got curious and got an old battery powered radio, turned off the main breaker at our power pool and WOW! I still had loud noises coming out of the battery powered radio. I live on a farm and my closest neighbor is a mile away. There is nothing nearby that can be making interference. I realized that this noise is coming onto our property via the power line. Standing in my front yard this interference was preventing a known working radio from receiving stations. By turning the dial I learned that it peaked out at 2 KC intervals from 16 KC to 8 KC. I got into my car and went for a drive discovering that this interference is present half a mile away when I park under the power lines. Tomorrow I will call my power provider and hope that the conversation goes well ?. They have an arc going on somewhere like cracked, dirty insulators or trees ? touching
Well I will sign off before I use up too much text and will report back when I have more capacitors and no harmonics floating around in my house.
Bruce B
One of the first things I did before a power up was to look for shorts and to own out all of the coils. They all checked out ok. I replaced all the caps from the antenna to the 2nd detector. When I powered on I got plenty of sound, no stations though. I then did an alignment that seemed to go well but still no stations, just tunable noise. The noise gets quiet when a modulated single is applied to the antenna.
I have used an oscilloscope and and can see a 260 KC wave form when placing the prob close to the ocilator. So I think the coils are still good for now,?
I am waiting till next week to hopefully resume playing with my radio. A couple of things have developed, one I ran out of capacitors and and am waiting on an order of more caps.
The other thing is Morzh ask about nearby by interference. Well I got curious and got an old battery powered radio, turned off the main breaker at our power pool and WOW! I still had loud noises coming out of the battery powered radio. I live on a farm and my closest neighbor is a mile away. There is nothing nearby that can be making interference. I realized that this noise is coming onto our property via the power line. Standing in my front yard this interference was preventing a known working radio from receiving stations. By turning the dial I learned that it peaked out at 2 KC intervals from 16 KC to 8 KC. I got into my car and went for a drive discovering that this interference is present half a mile away when I park under the power lines. Tomorrow I will call my power provider and hope that the conversation goes well ?. They have an arc going on somewhere like cracked, dirty insulators or trees ? touching
Well I will sign off before I use up too much text and will report back when I have more capacitors and no harmonics floating around in my house.
Bruce B