Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Help understanding a 89 radio rebuild new guy
#12

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


Messages In This Thread
462ron - by 462ron - 09-01-2024, 08:49 AM
462ron - by 462ron - 09-02-2024, 08:04 AM
RE: Help understanding a 89 radio rebuild new guy - by Bruce B - 09-02-2024, 09:44 AM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently 1749 online users. [Complete List]
» 1 Member(s) | 1748 Guest(s)
Avatar

>